Page 1 Preface Introduction Functions SIPROTEC Mounting and Commissioning Numerical Overhead Technical Data Contact Line Protection for Appendix AC Traction Power Supply 7ST6 Literature V4.2 Glossary Manual Index E50417-G1176-C251-A3...
Page 2 We reserve the right to make technical improvements without SIPROTEC, SINAUT, SICAM, SITRAS and DIGSI are registered notice. trademarks of SIEMENS AG. Other designations in this manual might be trademarks whose use by third parties for their own pur- poses would infringe the rights of the owner.
Page 3: Functions 3
(Low-voltage directive 73/23 EEC). This conformity is proved by tests conducted by Siemens AG in accordance with Article 10 of the Council Directives in agreement with the generic standards EN61000-6-2 and EN 61000-6-4 for the EMC directive, and with the standard EN 60255-6 for the low-voltage directive.
Page 4 +49 - 180 - 524 7000 Fax: +49 - 180 - 524 2471 E-mail: services@ptd.siemens.de Instructions and The warnings and notes contained in this manual serve for your own safety and for Warnings an appropriate lifetime of the device. Please observe them!
Page 5 Preface Definition QUALIFIED PERSONNEL Prerequisites to proper and safe operation of this product are proper transport, proper storage, setup, installation, operation, and maintenance of the product, as well as careful operation and servicing of the device within the scope of the warn- ings and instructions of this manual.
Page 6 Preface External binary output signal with number (device indication) used as input signal Example of a parameter switch designated FUNCTION with the address 1234 and the possible settings ON and OFF Besides these, graphical symbols are used according to IEC 60617-12 and IEC 60617-13 or symbols derived from these standards.
Page 7: Table Of Contents
Contents Introduction..............15 Overall Operation .
Page 8 Contents Distance Protection ............47 2.2.1 Enabling the Distance Protection.
Page 9 Contents Circuit Breaker Failure Protection ......... . . 103 2.8.1 Functional Description .
Page 10 Contents 2.16 Monitoring Function ............166 2.16.1 Hardware Monitoring .
Page 11 Contents 2.21 Use in auto-transformer systems..........205 2.21.1 Functional Description .
Page 12 Contents Technical Data ..............255 General .
Page 13 Contents Appendix ..............289 Ordering Information and Accessories .
Page 14 Contents 7ST6 Manual E50417-G1176-C251-A3...
Page 15: Introduction
Introduction ® The SIPROTEC 4 7ST6 device is introduced in this chapter. An overview of the scope of application, the properties and functional scope of the device is provided. Overall Operation Application Scope Characteristics 7ST6 Manual E50417-G1176-C251-A3...
Page 16: Overall Operation
1 Introduction Overall Operation ® The SIPROTEC 4 7ST6, Numerical Overhead Contact Line Protection for AC Traction Power Supply, is equipped with a powerful 32-bit microprocessor. All tasks are processed numerically, from acquisition of measured values up to commands to the circuit breakers.
Page 17 1.1 Overall Operation The IA input amplifier group allows high impedance connection for analog input values and contains filters optimized with regard to bandwidth and processing speed for mea- sured value processing. In the analog/digital converter unit, the analog input values are sampled, digitized and supplied to the microcomputer system.
Page 18 1 Introduction Power Supply These described functional units are supplied by a power supply PS with the neces- sary power in the different voltage levels. Brief supply voltage dips which may occur on short circuits in the auxiliary voltage supply of the power system are usually bridged by a capacitor (see also Technical Data, Chapter 4).
Page 19: Application Scope
1.2 Application Scope Application Scope ® The SIPROTEC 4 7ST6, Numerical Overhead Contact Line Protection for AC Traction Power Supply, is a selective and fast protection device for overhead contact lines with single- and multi-ended infeeds. The device incorporates the functions which are normally required for the protection of an overhead contact line section and is therefore capable of universal application.
Page 20 1 Introduction Indications and The operational indications provide information about conditions in the power system Measured Values; and the device itself. Measurement quantities and resulting computed values can be Fault Recording displayed locally and communicated via the serial interfaces. Device indications can be assigned to a number of LEDs on the front cover (allocat- able), can be externally processed via output contacts (allocatable), linked with user- definable logic functions and/or issued via serial interfaces.
Page 21: Characteristics
1.3 Characteristics Characteristics General Character- • Powerful 32-bit microprocessor system istics • Complete digital processing of measured values and control, from the sampling of the analog input values up to the closing and tripping commands to the circuit breakers • Complete galvanic and reliable separation between internal processing circuits from the measurement, control, and power supply circuits by analog input transduc- ers, binary inputs and outputs and the DC/DC or AC voltage converters •...
Page 22 1 Introduction Voltage Protection • Two-stage overvoltage and undervoltage detection (optional) • Two overvoltage stages for the overhead contact line ( U>>, U> ) • Two undervoltage stages for the overhead contact line (U<<, U<) Thermal Overload • Determination of the overhead contact line temperature by creating a thermal profile Protection of the object to be protected •...
Page 23 1.3 Characteristics Trip Circuit Super- • Integrated trip circuit supervision vision User Defined • Freely programmable combination of internal and external signals for the imple- Functions mentation of user-defined logic functions (optional) • All common logic functions • Delays and limit-value inquiries Breaker Control •...
Page 24 1 Introduction 7ST6 Manual E50417-G1176-C251-A3...
Page 25: Functions
Functions This chapter describes the individual functions of the SIPROTEC 4 device 7ST6. It shows the setting possibilities for each function in maximum configuration. Guidelines for establishing setting values and, where required, formulae are given. Additionally, on the basis of the following information, it may be defined which func- tions are to be used.
Page 26: General
2 Functions General A few seconds after the device is switched on, the initial display appears in the LCD. Depending on the device version either measured values (four-line display, device type 7ST61) or a single-phase switching diagram of the feeder status (graphic display, device type 7ST63) is displayed in the 7ST6.
Page 27: Setting Notes
2.1 General The following table presents an overview of the activation or blocking of functions. Details are set out in the respective function description. ON/OFF Blocking Function Para Para Distance Protection High-Speed Overcurrent Pro- tection Overcurrent Protection Emergency Overcurrent Pro- tection Voltage Protection Thermal Overload Protection...
Page 28 2 Functions Function Provided in the Basic Not Provided in the Basic Version Version Distance Protection Time Overcurrent Protection Emergency Overcurrent Protection Thermal Overload Protection Ambient Temperature Sensing Trip Circuit Supervision Defrosting Protection Current-time Integral High-Speed Overcurrent Protection Inrush Restraint Automatic Reclosure Synchro-check Circuit Breaker Failure Protection...
Page 29: Settings
2.1 General 2.1.1.3 Settings Addr. Parameter Setting Options Default Setting Comments Grp Chge OPTION Disabled Enabled Setting Group Change Option Enabled OSC. FAULT REC. Disabled Enabled Oscillographic Fault Records Enabled DISTANCE CURVE Quadrilateral Combined Distance Curve Combined InrushRestraint Disabled Enabled 2nd Harmonic Inrush Restraint Enabled FCT HS O/C...
Page 30: Device
2 Functions 2.1.2 Device The device requires some general information. This may be, for example, the type of indication to be issued in the event a power system fault occurs. 2.1.2.1 Trip Dependent Indications The recording of indications masked to local LEDs, and the maintenance of spontane- ous indications, can be made dependent on whether the device has issued a trip signal.
Page 31: Settings
2.1 General 2.1.2.4 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. Addr. Parameter Setting Options Default Setting Comments FltDisp.LED/LCD Target on PU Target on PU Fault Display on LED / LCD Target on TRIP Spont.
Page 32 2 Functions Information Type of In- Comments formation Error 5V Error 5V Fail.TEMPSENS Failure of outdoor temp. sensing Alarm Sum Event Alarm Summary Event Fail Battery Failure: Battery empty Error A/D-conv. Error: A/D converter Alarm Clock Alarm: Real Time Clock Error Board 1 Error Board 1 Error Board 2...
Page 33: Power System Data 1
2.1 General 2.1.3 Power System Data 1 The device requires certain basic data regarding the protected equipment, so that the device will be compatible with its desired application. This comprises e.g. nominal system data, nominal data of transformers, polarity ratios and their physical connec- tions, in certain cases circuit breaker properties, and similar.
Page 34 2 Functions In auto-transformer systems, the protection functions can evaluate either • The summation current of the overhead contact line current and the negative feeder current, or • The overhead contact line current In the parameter CURRENT I1, I2 (address 213) you specify which current will be fed to the protection functions for evaluation.
Page 35 2.1 General At address 239 T-CB close the operating time of the connected circuit breaker is Circuit Breaker set for the CLOSE command. This operating time will be taken into account by the Sync. Check function when closing the circuit breaker. At address 237 the operating time of the circuit breaker T CB BREAKTIME is set for the TRIP command.
Page 36: Settings
2 Functions 2.1.3.2 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments...
Page 37: Information List
2.1 General Addr. Parameter Setting Options Default Setting Comments T CB BREAKTIME 0.001 .. 0.600 sec 0.080 sec Breaktime (Circuit Break- T CB OPENING 0.001 .. 0.200 sec 0.030 sec Opening Time (Circuit Breaker) T-CB close 0.01 .. 0.60 sec 0.06 sec Closing (operating) time of 240A...
Page 38: Change Group
2 Functions 2.1.4 Change Group 2.1.4.1 Purpose of the Setting Groups Up to four independent setting groups can be created for establishing the device's function settings. During operation, the user can locally switch between setting groups using the operator panel, binary inputs (if so configured), the operator and service in- terface per PC, or via the system interface.
Page 39: Settings
2.1 General 2.1.4.3 Settings Addr. Parameter Setting Options Default Setting Comments CHANGE Group A Group A Change to Another Setting Group Group B Group C Group D Binary Input Protocol 2.1.4.4 Information List Information Type of In- Comments formation Group A IntSP Group A Group B...
Page 40: Power System Data 2
2 Functions 2.1.5 Power System Data 2 The general protection data (P.System Data 2) include settings associated with all functions rather than a specific protection, monitoring or control function. In contrast to the P.System Data 1 as discussed before, these can be changed over with the setting groups and can be configured via the operator panel of the device.
Page 41: Settings
2.1 General 2.1.5.2 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments...
Page 42 2 Functions Addr. Parameter Setting Options Default Setting Comments 1150A SI Time Man.Cl 0.01 .. 30.00 sec 0.30 sec Seal-in Time after MANUAL closures 1151 SYN.MAN.CL with Sync-check w/o Sync-check Manual CLOSE w/o Sync-check COMMAND generation 0.05 .. 80.00 Ω/mi 0.30 Ω/mi 1160 Reactance per Unit Length...
Page 43: Information List
2.1 General 2.1.5.3 Information List Information Type of In- Comments formation ProtActive IntSP At Least 1 Protection Funct. is Active ProtON/OFF IntSP Protection ON/OFF (via system port) Pow.Sys.Flt. Power System fault Fault Event Fault Event >Manual Close >Manual close signal >CloseCmd.Blo >Block all close commands from external >FAIL:Feeder VT...
Page 44: Oscillographic Fault Records
2 Functions 2.1.6 Oscillographic Fault Records 2.1.6.1 Functional Description The 7ST6 numerical overhead contact line protection is equipped with a fault record- ing function. The instantaneous values of the measurement quantities i (overhead contact line cur- rent) and u (overhead contact line voltage) are recorded in all variants of the 7ST6 device.
Page 45: Setting Notes
2.1 General the central device. Currents and voltages are referred to their maximum values, scaled to their rated values and prepared for graphic representation. Binary signal traces (marks) of particular events, e.g. „fault detection“, „tripping“ are also represented. In the event of transfer to a central device, the request for data transfer can be exe- cuted automatically and can be selected to take place after each fault detection by the protection, or only after a trip.
Page 46: Settings
2 Functions 2.1.6.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. Addr. Parameter Setting Options Default Setting Comments 402A WAVEFORMTRIGGE Save w. Pickup Save w. Pickup Waveform Capture Save w. TRIP Start w.
Page 47: Distance Protection
2.2 Distance Protection Distance Protection The type of characteristics used for the distance protection is specified in the Functional Scope under parameter 113 DISTANCE CURVE. Combined or polygonal tripping characteristics are available. 2.2.1 Enabling the Distance Protection The distance protection requires several enable signals. These enable signals ensure that the distance protection works only with measurement signals that allow precise measurement of the impedance.
Page 48: Distance Protection With Combined Tripping Characteristic
2 Functions 2.2.2 Distance Protection with Combined Tripping Characteristic With this tripping characteristic, the curves are constituted by one circle segment and several straight lines. The radius „Z“ of the circle segment defines the reach of the associated tripping zone. The circle segment is limited by the directional straight lines „β“...
Page 49 2.2 Distance Protection Figure 2-3 Tripping characteristic of the combined characteristic 7ST6 Manual E50417-G1176-C251-A3...
Page 50: Distance Protection With Polygonal Tripping Characteristic
2 Functions 2.2.3 Distance Protection with Polygonal Tripping Characteristic With this tripping characteristic, the curves are constituted by several straight lines. The straight line in parallel to the R axis defines the largest reactance present in the tripping area, and thus the range of the tripping zone. The straight line in parallel to the X axis defines the limitation of the tripping area in R direction.
Page 51 2.2 Distance Protection Figure 2-4 Tripping characteristic of the polygonal characteristic 7ST6 Manual E50417-G1176-C251-A3...
Page 52: Short-Circuit Detection By Current And Voltage Angle Changes
2 Functions 2.2.4 Short-circuit Detection by Current and Voltage Angle Changes In highly loaded, long overhead contact lines, when energizing with high loads or load currents at the end of long supply zones, the load impedances can be as high as the short-circuit impedances, so that an impedance comparison alone is no longer suffi- cient.
Page 53 2.2 Distance Protection Figure 2-6 Logic of the short-circuit detection 7ST6 Manual E50417-G1176-C251-A3...
Page 54: Tripping Logic Of The Distance Protection
2 Functions The short-circuit detection logic provides the signals „Dis. T2K active“ (FNo. 3909) and „Dis. T3K active“ (FNo. 13804). These signals are used for switcho- ver of the tripping times of the zones Z2 and Z3. If these signals are active, the tripping times T2K (FNo.
Page 55 2.2 Distance Protection Figure 2-7 Tripping logic of independent zones The logic for providing the direction signals and the general pickup and trip are shown separately in the figure below. 7ST6 Manual E50417-G1176-C251-A3...
Page 56 2 Functions Figure 2-8 Overreach logic of the distance protection 7ST6 Manual E50417-G1176-C251-A3...
Page 57: Tripping Characteristic For Manual Reclose
2.2 Distance Protection 2.2.6 Tripping Characteristic for Manual Reclose The distance protection zones described in this subsection are only available if the function Auto Reclose is available in the device. The controlled zone Z1B is usually applied as an overreaching zone. The logic is shown in Figure 2-9.
Page 58: Tripping Characteristic For Manual Close
2 Functions 2.2.7 Tripping Characteristic for Manual Close Direction Determi- If you switch a deenergized line that is faulty line to a live busbar, the direction of faults nation on Closing close to the location of the voltage transformer is difficult to determine, because the measuring voltage required for correct direction determination is missing.
Page 59: Zone Changeover (Only For 16.7 Hz)
2.2 Distance Protection 2.2.8 Zone Changeover (only for 16.7 Hz) To adapt the protection to different switching states of the overhead contact line during operation, the device is equipped with a changeover function of the impedance stages for zone Z1, zone Z2 and zone Z3 via binary inputs, a control system or the operator control panel.
Page 60: Setting Notes
2 Functions Figure 2-11 Logic of change to zone, example zone Z1 2.2.9 Setting Notes At address 1201 FCT Distance the distance protection function can be switched ON or OFF. At address 113 DISTANCE CURVE the characteristic types Quadrilateral and Combined can be selected (see Subsection 2.1.1.2). This setting is valid for all characteristics of the distance protection.
Page 61 2.2 Distance Protection Example: 15 kV overhead contact line with the data: Maximum transmitted power S = 10 MVA = 784 A LMax Minimum operating voltage U = 0.85 U Current transformers 1000 A / 1 A Voltage transformers 15 kV/0.1 kV The resulting minimum load impedance is therefore: This value can be entered as a primary value when parameterizing with a PC and DIGSI®.
Page 62 2 Functions secondary quantities, the values derived from the grading coordination chart must be converted to the secondary side of the current and voltage transformers. In general: Accordingly, the reach for any distance zone can be specified as follows: where: = Current transformer ratio = Transformation ratio of voltage transformer Calculation example:...
Page 63 2.2 Distance Protection inception. Accordingly the directional characteristic includes a safety margin with respect to the limits of the first quadrant in the R–X diagram. This safety margin is defined by the parameters Beta (β) and Gamma (γ). Normally the default settings of these parameters need not be changed.
Page 64 2 Functions Note For all three distance zones to function correctly, the following conditions must imper- atively be met for each characteristic: γ < α R < Z cosα R ≤ Z cos γ β – γ ≤ 180° Polygonal Charac- If the distance protection is to have impedance characteristics with polygonal charac- teristic, set address 113 DISTANCE CURVE=Quadrilateral.
Page 65 2.2 Distance Protection Independent Zones The table below shows the assignment of the general characteristic parameters to the concrete setting values for the independent zones: Table 2-2 Assignment of setting parameters for the independent zones of the distance protection Parameter Setting parameters DIGSI®...
Page 66 2 Functions mally set to at least 120 % of the line length. The delay times are set in accordance with the type of application, usually to zero or a very small delay. Furthermore, these zones do not have alternative parameters for the reach and the minimum load impedance (see Table 2-3).
Page 67 2.2 Distance Protection Inrush Blocking If the protection zone of the device includes power transformers, tripping may be caused by the inrush effect when switching in transmission lines operating at weak load or no load. With such a constellation, you should activate the blocking of the distance protection by inrush detection.
Page 68 2 Functions Calculation example: 15 kV infeed with the following impedance from the infeed point to the location of the voltage transformer: Z = (2 + j 7)Ω (corresponds to e.g. 23.5 km Re200 with amplifi- cation line one-track at 50 Hz, or 29 km Re330 two-track without return-line cable and amplification line) Maximum start-up current primary: I = 550 A...
Page 69: Settings
2.2 Distance Protection 2.2.10 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 1201 FCT Distance Distance protection is 1202 Minimum Iph> 0.1 .. 2.0 A 0.1 A Phase Current threshold for dist.
Page 70 2 Functions Addr. Parameter Setting Options Default Setting Comments 0.00 .. 30.00 sec; ∞ 1306 0.00 sec Delay Time Zone Z1 0.20 .. 250.00 Ω 5.00 Ω 1308 Resistance R Zone Z1 0.04 .. 50.00 Ω 1.00 Ω 0.20 .. 250.00 Ω 10.00 Ω...
Page 71 2.2 Distance Protection Addr. Parameter Setting Options Default Setting Comments 0.20 .. 250.00 Ω 6.00 Ω 1326 R1B Reverse Resistance R Zone Z1B Reverse 0.04 .. 50.00 Ω 1.20 Ω 0.20 .. 250.00 Ω 12.00 Ω 1327 X1B Reverse Reactance X Zone Z1B Reverse 0.04 ..
Page 72 2 Functions Addr. Parameter Setting Options Default Setting Comments 0.20 .. 250.00 Ω 20.00 Ω 1349 Reactance X Zone Z2 0.04 .. 50.00 Ω 4.00 Ω 0.20 .. 250.00 Ω 20.00 Ω 1350 Impedance Z Zone Z2 0.04 .. 50.00 Ω 4.00 Ω...
Page 73 2.2 Distance Protection Addr. Parameter Setting Options Default Setting Comments 0.20 .. 250.00 Ω 30.00 Ω 1369 Reactance X Zone Z3 0.04 .. 50.00 Ω 6.00 Ω 0.20 .. 250.00 Ω 30.00 Ω 1370 Impedance Z Zone Z3 0.04 .. 50.00 Ω 6.00 Ω...
Page 74: Information List
2 Functions Addr. Parameter Setting Options Default Setting Comments 0.20 .. 250.00 Ω 10.00 Ω 1388 ROR Reverse Resistance R Overreach Zone Reverse 0.04 .. 50.00 Ω 2.00 Ω 0.20 .. 250.00 Ω 20.00 Ω 1389 XOR Reverse Reactance X Overreach Zone Reverse 0.04 ..
Page 75 2.2 Distance Protection Information Type of In- Comments formation 3931 Dis. Trip Z2L Dist.: Trip in zone Z2 (overload) 3935 Dist. T2K Dist.: Time T2K (Zone Z2) expired 3936 Dist. T2L Dist.: Time T2L (Zone Z2) expired 3943 DIS Flt forward DIS Fault direction forward 3944 DIS Flt reverse...
Page 76: Overcurrent Protection
2 Functions Overcurrent Protection The 7ST6 device has an integrated time overcurrent protection function. This function can be used as a backup overcurrent protection which works independently of the other protection and monitoring functions, including distance protection. The back-up time overcurrent protection could for instance be used as the only short-circuit protec- tion if the voltage transformers are not yet available when the feeder is initially com- missioned.
Page 77 2.3 Overcurrent Protection Figure 2-14 Pick-up and tripping logic of the definite time overcurrent stages Figure 2-14 shows the logic diagram of the definite-time overcurrent stages. The function block „Switch onto fault“ is common to all stages. The parameter O/C SOTF Trip (address 2603) specifies whether instantaneous tripping of this stage via the binary input „>Manual Close“...
Page 78 2 Functions Definite Time High- The logic of the high-set current stage I>> is the same as that of the I>>> stage. The set Current Stage two stages differ only in their parameters for the current threshold and the delay time. The parameter I>>...
Page 79: Setting Notes
2.3 Overcurrent Protection Switching onto a The internal line energization detection can be used to achieve quick tripping of the Fault circuit breaker in case of an earth fault. The time overcurrent protection then issues an instantaneous trip command. Pickup Logic and The pickup signals of the individual stages are OR-combined and cause the indication „O/C PICKUP“...
Page 80 2 Functions With the parameter I>> (address 2608) the pickup threshold of the high-set current High-set Current Stage I>> stage is specified. ® When using a personal computer and DIGSI to apply the settings, these can be op- tionally entered as primary or secondary values. If secondary quantities are used, all currents must be converted to the secondary side of the current transformers.
Page 81 2.3 Overcurrent Protection Overcurrent Stages If the overcurrent stage is to be operated as an inverse-time stage with ANSI charac- teristics, address 2602 CURVE O/C must be set to TOC ANSI. IP in Inverse-time Overcurrent Pro- With ANSI characteristics, the following characteristics are available in address 2612 tection with ANSI ANSI Curve: Characteristics...
Page 82: Settings
2 Functions 2.3.3 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 2302 Inrush O/C O/C Blocked by Inrush 2601 OverCurrent Overcurrent Protection Function 2602 CURVE O/C...
Page 83: Information List
2.3 Overcurrent Protection 2.3.4 Information List Information Type of In- Comments formation 1820 Ip picked up Ip picked up 1825 Ip TRIP Ip TRIP 7151 O/C OFF Overcurrent is switched OFF 7161 O/C PICKUP Overcurrent PICKED UP 7191 O/C PICKUP I>> Overcurrent Pickup I>>...
Page 84: High-Speed Overcurrent Protection
2 Functions High-Speed Overcurrent Protection This function is optional, i.e. not included in all device variants. In railway networks, close-in faults can lead to very high short-circuit currents. The high-speed overcurrent protection issues in very short time the trip command to the circuit breaker.
Page 85: Setting Notes
2.4 High-Speed Overcurrent Protection 2.4.2 Setting Notes The high-speed overcurrent protection is only effective and accessible if address 124 General FCT HS O/C has been set to Enabled during the configuration of the functional scope. In order to be effective, the high-speed overcurrent protection function must also be switched ON in address 2401 = HS O/C.
Page 86: Settings
2 Functions 2.4.3 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 2401 HS O/C High-Speed Overcurrent Protection 1.0 .. 25.0 A; ∞ 2404 I HS O/C 10.0 A...
Page 87: Emergency Overcurrent Protection
2.5 Emergency Overcurrent Protection Emergency Overcurrent Protection 2.5.1 General Whereas the distance protection can only function correctly if the measured voltage signals are available to the device, the emergency overcurrent protection only requires the currents. The emergency overcurrent protection function is activated automatically, and only if the distance protection is ineffective (emergency operation).
Page 88: Setting Notes
2 Functions Figure 2-19 Pick-up and tripping logic of the backup O/C protection 2.5.3 Setting Notes The emergency overcurrent protection is only effective and accessible if address 127 General FCT Emerg. O/C has been set to Enabled during the configuration of the functional scope.
Page 89: Settings
2.5 Emergency Overcurrent Protection In address 2705 you specify the pickup threshold I Emerg. O/C of the emergency I Emerg. O/C overcurrent protection. ® When using a personal computer and DIGSI to apply the settings, these can be op- tionally entered as primary or secondary values. If secondary quantities are used, all currents must be converted to the secondary side of the current transformers.
Page 90: Overvoltage And Undervoltage Protection
2 Functions Overvoltage and Undervoltage Protection This function is optional, i.e. not included in all device variants. Voltage protection has the function to protect electrical equipment against undervolt- age and overvoltage. Both operational states are unfavourable as overvoltage might e.g. cause insulation problems or undervoltage might cause stability problems. Both the overvoltage and the undervoltage protection in the 7ST6 use the overhead contact line voltage U.
Page 91: Undervoltage Protection
2.6 Overvoltage and Undervoltage Protection on/off. The overvoltage protection is blocked as soon as the signal „Dis. PICKUP“ is activated. Both stages of the overvoltage protection have a separately settable grading margin for the TRIP command of their respective stage. 2.6.2 Undervoltage Protection The figure below shows the logic diagram of the undervoltage protection.
Page 92: Setting Notes
2 Functions 2.6.3 Setting Notes The voltage protection can only operate if the parameter O/U VOLTAGE (address 137) has been set to Enabled during the configuration of the functional scope. Note For overvoltage protection it is particularly important to observe the setting hints: The overvoltage level must never be set to less than an undervoltage level.
Page 93: Settings
2.6 Overvoltage and Undervoltage Protection 2.6.4 Settings Addr. Parameter Setting Options Default Setting Comments 3701 OVERVOLTAGE Overvoltage Protection 20 .. 170 V; ∞ 3702 U>> 150 V Pickup Overvoltage U>> 3703 U>> Reset 0.50 .. 0.95 0.95 Reset Ratio U>> 0.00 ..
Page 94: Thermal Overload Protection
2 Functions Thermal Overload Protection The thermal overload protection prevents damage to the overhead contact line caused by thermal overloading. It is based on the principle of creating a thermal model of the overhead contact line on the basis of the current load and the ambient temperature. Where no ambient temperature sensing is provided, a fixed value can be used instead of an ambient temperature measurement.
Page 95: Ambient Temperature Sensing
2.7 Thermal Overload Protection tripping temperature, is reached, the protected object is disconnected from the net- work. Reclosing is prevented until the temperature has dropped again below TEMP CLOSE. The figure below shows the pickup and trip logic of the overload protection. Figure 2-23 Pick-up and tripping logic of the overload protection 2.7.2...
Page 96 2 Functions the ambient temperature sensing is assumed, and the last valid ambient temperature is kept. In addition, the indication „Fail.TEMPSENS“ (FNo. 158) is output. If the ambient temperature sensing is already disturbed on power-up of the protection relay, the ambient temperature set at address 4215 AMB.TEMP. is used for the cal- culation, and the indication „Fail.TEMPSENS“...
Page 97: Catenary Changeover
2.7 Thermal Overload Protection 2.7.3 Catenary Changeover Where the continuous current carrying capacity of the catenary assembly depends on the switching state, the current carrying capacity of up to 3 different switching states can be processed. The thermal model can be matched to the current switching state by parameter set- tings, by the control system or through the system interface.
Page 98 2 Functions The figure below shows the control logic of the catenary changeover: Figure 2-25 Control logic of the catenary changeover 7ST6 Manual E50417-G1176-C251-A3...
Page 99: Setting Notes
2.7 Thermal Overload Protection 2.7.4 Setting Notes General A prerequisite for the application of the thermal overload function is that during the configuration of the functional scope in address 142 Therm.Overload = Enabled was set. The function can be turned ON or OFF in address 4201 Ther. OVER LOAD. When overload protection is disabled, the thermal replica will also be reset.
Page 100 2 Functions Example: Regular overhead contact line Re250 Permissible continuous catenary current ITRise = 750 A Current transformers 1000 A / 1 A Setting value k ITRise = 0.7 In address 4207 TEMP ALARM the temperature threshold for the thermal alarm stage Temperature Limits is set.
Page 101: Settings
2.7 Thermal Overload Protection 2.7.5 Settings Addr. Parameter Setting Options Default Setting Comments 4201 Ther. OVER LOAD Thermal overload protection 4202 CAT CHANGEOVER Binary Input Binary Input Catenary Changeover Protocol Setting Blocked 4203 2.0 .. 30.0 min 5.0 min Thermal Time Constant 4204 k ITRise 0.10 ..
Page 102 2 Functions Information Type of In- Comments formation 13829 Cat3 ON/OFF TEL IntSP O/L Catenary 3 ON/OFF via Telegram 13980 Cat.1 ON/OFF BI IntSP Catenary 1 ON/OFF about Binary Input 13981 Cat.2 ON/OFF BI IntSP Catenary 2 ON/OFF about Binary Input 13982 Cat.3 ON/OFF BI IntSP...
Page 103: Circuit Breaker Failure Protection
2.8 Circuit Breaker Failure Protection Circuit Breaker Failure Protection This function is optional, i.e. not included in all device variants. The circuit breaker failure protection provides rapid back-up fault clearance, in the event that the circuit breaker fails to respond to a trip command from a protective func- tion of the local circuit breaker.
Page 104 2 Functions The reset time of the feeder protection is not relevant because the breaker failure pro- tection itself recognizes the interruption of the current. Current Flow Moni- The current detected by the device is filtered by numerical filters so that only the fun- toring damental wave is evaluated.
Page 105 2.8 Circuit Breaker Failure Protection When the initiate conditions are fulfilled, the associated timers tBF1 (address 3904) Delay Times and tBF2 (address 3905) are started. The circuit breaker pole(s) must open before the associated time has elapsed. The device detects that the circuit breaker has opened when the current drops below the dropout threshold I>...
Page 106: Setting Notes
2 Functions 2.8.2 Setting Notes The breaker failure protection can only operate if it has been set as Enabled during General configuration of the functional scope (address 139 BREAKER FAILURE). The breaker failure protection is switched ON or OFF at address 3901 FCT Circuit Breaker BreakerFail.
Page 107 2.8 Circuit Breaker Failure Protection With two-stage operation, the trip command is repeated after a time delay tBF1 (ad- Two-stage Breaker dress 3904) to the local feeder breaker, normally to a different set of trip coils of this Failure Protection breaker.
Page 108: Settings
2 Functions 2.8.3 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 3901 FCT BreakerFail Breaker Failure Protection 3902 I> BF 0.05 .. 20.00 A 0.10 A Pick-up threshold I>...
Page 109: Trip Supervision
2.9 Trip Supervision Trip Supervision The trip supervision function checks whether the circuit breaker has tripped correctly in case of an external trip or a trip command by an additional current flow monitoring. 2.9.1 Functional Description After the circuit breaker has tripped, the device checks that no current flows, or only a current below a certain threshold, once the supervision time has elapsed.
Page 110: Setting Notes
2 Functions 2.9.2 Setting Notes General The circuit breaker trip supervision is one of the basic functions of the 7ST6 device. This function cannot be disabled by a configuration parameter. To activate the function, the indication „>Ext. CB Trip“ (FNo. 1438) must be con- figured to a binary input, and this binary input must be connected with the TRIP command of the circuit breaker to be monitored.
Page 111: Defrosting Protection
2.10 Defrosting Protection 2.10 Defrosting Protection In some models of the 7ST6 device, the basic variant is equipped with the defrosting protection (3xI, 3xU). In order to remove icing from overhead contact line systems, unused lines are series- connected (by the operator) and heated with a low current, if necessary with an inter- posed resistor.
Page 112 2 Functions Figure 2-31 Simplified operation scheme of the defrosting protection operating on the differ- ential current principle In addition to the current transformer in the infeed of the overhead contact line I , which is shared with the other protection functions, another current transformer is needed for the defrosting current flowing back.
Page 113 2.10 Defrosting Protection Protection Princi- The defrosting protection operates on the differential protection principle. This princi- ple says that the phases and amplitudes of both measured currents are the same in fault-free condition. The condition i(t) + ix(t) = 0 is always fulfilled in fault-free condition of the line.
Page 114 2 Functions Figure 2-32 Characteristic curve of the differential protection for defrosting The characteristic can be configured with the following parameters: Id> Pickup value of the differential current Characteristic slope The knee-point of the characteristic is determined by the parameters k and Id>. The value for Id>...
Page 115 2.10 Defrosting Protection Switching On/Off The defrosting protection can be switched on/off via parameters, binary input or the and Blocking protocol of the system interface. Also, the defrosting protection can be dynamically blocked via binary input or via pro- tocol. The figure below shows the control logic: Figure 2-33 Control logic of the defrosting protection Pickup and TRIP...
Page 116 2 Functions Definite-time The defrosting protection is provided with a two-stage definite-time overcurrent pro- Backup Time Over- tection as backup protection. This backup protection is switched on and off together current Protection with the differential protection. The stages operate with the fundamental wave compo- nent of the defrosting current I.
Page 117: Setting Notes
2.10 Defrosting Protection 2.10.2 Setting Notes Preconditions When setting the general power system data (Power System Data 1, refer to Section 2.1.3.1) a number of parameters regarding the measured quantities and the operating mode of the defrosting protection function must be applied. This concerns the following parameters: 201 CT Starpoint Current direction of the current transformer...
Page 118 2 Functions Note For the setting of the pickup current, the setting of the differential protection delay must be taken into account. If the delay of the TRIP signal for the differential protection is set in such a way that transient states occurring on switching on the defrosting current have not yet entirely decayed, the pickup current must be set to approx.
Page 119: Settings
2.10 Defrosting Protection 2.10.3 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 4301 Defrosting Defrosting Protection 4302 ID> 0.10 .. 2.00 I/In 0.40 I/In Pickup Current ID>...
Page 120: Inrush Restraint
2 Functions 2.11 InRush Restraint This function is optional, i.e. not included in all device variants. When switching in equipment, especially transformers operating at weak load or no load, high inrush currents may briefly occur which can cause unwanted pickup of pro- tection functions.
Page 121 2.11 InRush Restraint Figure 2-36 Logic diagram of the inrush restraint Inrush current contains a relatively large second harmonic component (twice the nominal frequency) which is nearly absent during a fault current. Numerical filters that carry out a Fourier analysis of the current are used for the frequency analysis. As soon as the harmonics content exceeds the value set in 2nd HARM.BLOCK, an inrush current is detected.
Page 122: Setting Notes
2 Functions 2.11.2 Setting Notes The inrush restraint is only necessary if the device is to be used on transformer feeders or on overhead contact lines in an auto-transformer system. Even in those ap- plications, the inrush restraint is only needed for protection functions which the inrush current might cause to trip.
Page 123: Settings
2.11 InRush Restraint 2.11.3 Settings The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Setting Options Default Setting Comments 2301 Inrush DIS >=Z2 Distance Zones >=Z2 Blocked by Inrush 2302 Inrush O/C O/C Blocked by Inrush...
Page 124: Automatic Reclosure Function
2 Functions 2.12 Automatic Reclosure Function This function is optional, i.e. not included in all device variants. Experience shows that about 85% of the arc faults on overhead contact lines are ex- tinguished automatically after being tripped by the protection. This means that the line can be connected again.
Page 125 2.12 Automatic Reclosure Function The integrated auto reclose function allows up to 8 reclosure attempts. The first two interrupt cycles may operate with different parameters for action and dead times. The parameters of the second cycle also apply for the third cycle and onwards. Selectivity before In order for the automatic reclosure to be successful, all faults on the entire overhead Reclosure...
Page 126 2 Functions An exception to this is the last reclosure cycle. If all reclosure attempts were unsuc- cessful, zone Z1 is enabled prior to the last configured reclosure cycle. Initiation Initiation of the auto reclose function means storing the first trip signal during a network fault that was generated by a protection function which operates with the auto reclose function.
Page 127 2.12 Automatic Reclosure Function Example 2: 3 cycles are set. Initiation of the auto-reclosure is only allowed for the first. The action times are set as in example 1. The first protection trip takes place 0.5 s after pickup. Since the action time for the 1st cycle has already expired at this time, this cannot start the auto reclose function.
Page 128 2 Functions This interrogation usually suffices for a single reclosure scheme. Since, for example, the air pressure or the spring tension for the circuit breaker mechanism drops after the trip, no further interrogation should take place. The time needed by the circuit breaker to regain the ready state can be monitored by the 7ST6.
Page 129 2.12 Automatic Reclosure Function Until the set maximum number of permissible auto-reclose cycles has been reached, the reclaim time is reset with every new trip command after reclosure and started again with the next close command. If one of the reclosing attempts is successful, i.e. the fault disappeared after reclosure, the blocking time expires and the automatic reclosing system is reset.
Page 130 2 Functions Figure 2-39 Connection of an external protection device to the internal automatic reclosure function Thermal Auto- The thermal auto reclose function behaves largely in the same way as the general reclose Function auto reclose function, but is in part controlled by its own parameters and outputs its own indications.
Page 131: Setting Notes
2.12 Automatic Reclosure Function 2.12.2 Setting Notes General If no reclosure is required on the feeder to which the 7ST6 overhead contact line pro- tection is applied, e.g. for transformers, the auto reclose function must be removed during configuration of the device (address 133, see Section 2.1.1.2). The auto reclose function is then totally disabled, i.e.
Page 132 2 Functions The blocking duration following Manual-Close detection T-BLOCK MC (address 3423) must guarantee the circuit breaker to open and close reliably (0.5 s to 1 s). If a fault is detected by a protection function within this time after closing of the circuit breaker was detected, no reclosure takes place and a final trip command is issued.
Page 133 2.12 Automatic Reclosure Function nism and voltage check function is available or that an external device is available for synchronism check. Where no stability problems are to be expected during the auto- reclosure dead time, set address 3434 to NO. In address 3440 2nd Recl:START you set whether the 2nd to 8th cycle are permit- 2nd to 8th Reclo- ted to start the auto reclose function (= YES) or not.
Page 134 2 Functions Figure 2-40 Static blocking If a TRIP command occurs while the auto reclose function is statically blocked, the function passes to the dynamic blocking state. Possible Causes of The table below summarizes the possible causes of dynamic blocking: Dynamic Blocking Table 2-6 Possible causes of dynamic blocking...
Page 135 2.12 Automatic Reclosure Function TRIP out of Action The interval between the appearance of a pickup signal and the appearance of a TRIP command can be monitored by the action time in addresses 3431 1.AR: T-ACTION Time and 3441 2-8 Recl:T SI. The action time starts with the appearance of the pickup signal.
Page 136 2 Functions No More Cycles The maximum number of reclosure attempts specified in the settings is reached. If Possible now a TRIP command is given within the reclaim time, the auto reclose function is dy- namically blocked during 500 ms. The auto reclose function resumes its normal state when the blocking time has expired and new blocking conditions do not apply.
Page 137 2.12 Automatic Reclosure Function Separate binary inputs exist for switching the thermal auto reclose function on and off and for blocking it. Likewise, there are separate indications for the status of the thermal auto reclose function. For circuit breaker supervision, interaction with a synchro- check, the manual-close feature and the dynamic blocking time, the parameters of the general auto reclose function are used.
Page 138 2 Functions „AR no starter“ (FNo. 2823) In the configuration parameters AR w/ DIST. (address 3405), AR w/ HS O/C (ad- dress 3406), AR w/ DTT (address 3407) and the parameter AUTO-TH-AR (address 3450) no source has been defined for starting the auto reclose function. The automat- ic reclosure is therefore statically blocked.
Page 139: Settings
2.12 Automatic Reclosure Function 2.12.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. Addr. Parameter Setting Options Default Setting Comments 3401 AUTO RECLOSE Auto-Reclose Function 3402 No.Recl. 1 AR-cycle 1 AR-cycle Maximum Number of Reclosure 2 AR-cycles Attempts...
Page 140: Information List
2 Functions Addr. Parameter Setting Options Default Setting Comments 0.01 .. 1800.00 sec; ∞ 3442 2-8 Recl:Tdead 0.50 sec Dead Time for 2nd to 8th Reclo- sure Cycle 3450 AUTO-TH-AR Automatic Reclosure after Thermal Trip 3451 No. of TH-AR 1 AR-cycle 1 AR-cycle Max.
Page 141 2.12 Automatic Reclosure Function Information Type of In- Comments formation 2823 AR no starter AR: no starter configured 2829 AR Tact expired AR: action time expired before trip 2844 AR 1stCyc. run. AR 1st cycle running 2851 AR Close Auto-reclose Close command 2855 Th-AR ClosCmd Th-AR: Close command from thermal AR...
Page 142: Synchronism And Voltage Check
2 Functions 2.13 Synchronism and Voltage Check This function is optional, i.e. not included in all device variants. The synchronism and voltage check function ensures, when switching a line onto a busbar, that the stability of the network is not endangered. The voltage of the feeder to be energized is compared to the voltage of the busbar (reference voltage) to check conformances in terms of magnitude, phase angle and frequency within certain toler- ances.
Page 143 2.13 Synchronism and Voltage Check When closing via the integrated control function, the configured interlocking conditions may have to be verified before checking the conditions for synchronism. After the syn- chronism check grants the release, the interlocking conditions are not checked a second time.
Page 144 2 Functions The device issues indications if, after a request to check synchronism, the conditions for release are not fulfilled, i.e. if the absolute voltage difference Max. Volt. Diff, the absolute frequency difference Max. Freq. Diff, or the absolute phase angle difference Max.
Page 145: Setting Notes
2.13 Synchronism and Voltage Check • Is the magnitude of the voltage difference |ULine – URef| within the permissible limit Max. Volt. Diff? ± • Are the two frequencies fRef and fLine within the permitted operating range f 3 Hz? •...
Page 146 2 Functions WARNING! Closing under Asynchronous System Conditions Closing under asynchronous system conditions requires the closing time of the circuit breaker to be set correctly in the Power system data 1 (address 239). Otherwise, faulty synchronization may occur. The synchro-check can only operate if it has been set to Enabled during the config- General uration of the device scope (address 135 Synchro-Check).
Page 147 2.13 Synchronism and Voltage Check Address 3510 Op.mode with AR determines whether closing under asynchronous system conditions is allowed for automatic reclosure. Set this parameter to with T- CB close to allow asynchronous closing; the relay will then consider the circuit breaker closing time before determining the correct instant for the close command.
Page 148 2 Functions Address 3530 Op.mode with MC determines whether closing under asynchronous system conditions is allowed for manual closing or reclosure via control command. Set this parameter to with T-CB close to allow asynchronous closing; the relay will then consider the circuit breaker closing time before determining the correct instant for the close command.
Page 149 2.13 Synchronism and Voltage Check Note The closing functions of the device issue individual output indications for the corre- sponding close command. Be sure that the output indications are assigned to the correct output relays. FNo. 2851 „AR Close“ for CLOSE via command of the automatic reclosure, FNo.
Page 150: Settings
2 Functions 2.13.3 Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. Addr. Parameter Setting Options Default Setting Comments 3501 FCT Synchronism Synchronism and Voltage Check function 3502 Dead Volt. Thr. 1 .. 60 V Voltage Threshold Dead Line / Reference 3503...
Page 151: Information List
2.13 Synchronism and Voltage Check Addr. Parameter Setting Options Default Setting Comments 3538 MC Uref<Uline< Dead Ref. / Dead Line Check before MC 3539 MC O/RIDE Override of any check before Man.Cl 2.13.4 Information List Information Type of In- Comments formation 2901 >Sync.
Page 152: Fault Locator
2 Functions 2.14 Fault Locator This function is optional, i.e. not included in all device variants. The measurement of the distance to a fault is an supplement to the protection func- tions. Availability of the line for power transmission within the system can be in- creased when the fault is located and cleared faster.
Page 153 2.14 Fault Locator Figure 2-42 Determination of the distance to fault from the calculated fault reactance As a result, the fault location works correctly even if there are line sections with differ- ent reactance per unit length characteristics, or transformers, between the protection device and the fault.
Page 154: Setting Notes
2 Functions Note The direction indication orientates itself according to the line and is indicated indepen- dent from the direction indication of the distance protection. Depending on the fault lo- cation and the configured distance protection zone, it may deviate from the direction indication of the distance protection.
Page 155: Settings
2.14 Fault Locator 2.14.3 Settings Addr. Parameter Setting Options Default Setting Comments 3802 START TRIP TRIP Start fault locator with Reclosing/Trip 2.14.4 Information List Information Type of In- Comments formation 1106 >Start Flt. Loc >Start Fault Locator 1110 FltLoc block Fault locator is blocked 1114 Rpri =...
Page 156: It Function (Current-Time Integral)
2 Functions 2.15 It Function (current-time integral) This function is optional, i.e. not included in all device variants. Via two different procedures the It function makes information available, which enables an optimised determination of the service period of the circuit breaker by means of an adequately precise determination of the circuit breaker load.
Page 157 2.15 It Function (current-time integral) In the 7ST6 device the indication „>Brk Aux NC“ (FNo 4602) is used for this pur- pose. The device does not detect the opening of the circuit breaker auxiliary contact until a delay time t of approx.
Page 158 2 Functions terval, the current-time integral measurement is started. Then the last zero crossing of the current is determined. Using the TRIP In this case, the starting time of the current-time integral determination is computed Command with the following formula: where: Instant at which the TRIP command is issued by one of the protection TRIP...
Page 159: Function Description 2P-Procedure
2.15 It Function (current-time integral) 2.15.2 Function Description 2P-procedure General In the 2P-procedure the CB manufacturer's double-log operating cycle diagrams and the fault current measured at the time of contact separation serve as a basis for the calculation of the remaining lifespan. The data supplied by the CB manufacturer is transformed in such manner that, by means of measuring the fault currents, a concrete statement can be made with regard to the still possible operating cycles.
Page 160 2 Functions Figure 2-44 Logic of the Start and End Criterion As soon as the start criterion has been fulfilled, the parameterised operating time on tripping is started. The time of commencement of separation of the circuit breaker con- tacts is thus determined. The end of the trip procedure, including arc deletion is deter- mined via another given parameter (CB tripping time) supplied by the manufacturer of the circuit breaker.
Page 161 2.15 It Function (current-time integral) 2P Calculation The application of the two-point procedure for the calculation of the remaining lifespan depends on the 2P configuration. The CB manufacturer supplies a double-log diagram on the relation between the number of operating cycles and fault currents (see example in figure 2-45). This picture also serves to determine the still possible trips (in case of a trip with the same fault current).
Page 162 2 Functions The general straight-line equation for the double-log diagram can be derived from the exponential function, from which the coefficients b and m can be derived. Note As the directional coefficient of m < -4 is technically not relevant, but can nevertheless be derived from an incorrect parameterisation, it is limited to -4.
Page 163: Setting Notes
2.15 It Function (current-time integral) the 2P-procedure. All trips counted in this manner can be retrieved under the statistical value „mechan.TRIP=“ (FNo. 16011). 2.15.3 Setting Notes General The determination of the circuit breaker load in accordance with the It or 2P-procedure can only operate if you have set address 141 FCT It-Calc.
Page 164 2 Functions The parameters listed below represent important input values for a correct functioning of the sub-functions: The circuit breaker tripping time T CB BREAKTIME is a parameter supplied by the CB manufacturer. It comprises the complete trip procedure from trip command (activation of auxiliary power on the shunt opening release of the circuit breaker) to arc deletion.
Page 165: Settings
2.15 It Function (current-time integral) 2.15.4 Settings Addr. Parameter Setting Options Default Setting Comments 4101 It FUNCTION It Function 4102 0.001 .. 0.100 sec; 0 0.005 sec CB Response Time 4103 DELTA AuxCont -0.050 .. 0.050 sec 0.000 sec Time Diff. CB Main and Auxiliary Contact 1.0 ..
Page 166: Monitoring Function
2 Functions 2.16 Monitoring Function The device 7ST6 incorporates comprehensive monitoring functions which cover both hardware and software; the measured values are continuously checked for plausibility, so that the current and voltage transformer circuits are also included in the monitoring system to a large extent.
Page 167: Software Monitoring
2.16 Monitoring Function 2.16.2 Software Monitoring Watchdog For continuous monitoring of the program sequences, a watchdog timer is provided in the hardware (hardware watchdog) which will reset and completely restart the proces- sor system in the event of processor failure or if a program falls out of step. A further software watchdog ensures that any error in the processing of the programs will be recognized.
Page 168 2 Functions The distance and overvoltage protection is only activated again on returning measur- ing-circuit voltage. Figure 2-48 Logic diagram of the fuse failure monitor 7ST6 Manual E50417-G1176-C251-A3...
Page 169: Setting Notes
2.16 Monitoring Function 2.16.4 Setting Notes With the parameter MEASURE. SUPERV (address 2901) fuse failure monitoring can Fuse Failure Monitor either be switched off or operated in one of the two possible operating modes. If the parameter is set to Without FFM, a fuse failure (failure of the measuring voltage) is always detected when the voltage has dropped below 5 V while at the same time an operating current is flowing.
Page 170: Trip Circuit Supervision
2 Functions 2.17 Trip Circuit Supervision 2.17.1 Functional Description Trip Circuit Super- The overhead contact line protection 7ST6 is equipped with an integrated trip circuit vision supervision. Depending on the number of available binary inputs (not connected to a common potential), monitoring with one or two binary inputs can be selected. If the al- location of the required binary inputs does not match the selected monitoring mode, a corresponding alarm is issued („TripC1 ProgFAIL“).
Page 171 2.17 Trip Circuit Supervision A state in which both binary inputs are not activated („L“) is only possible in healthy trip circuits for a short transition period (trip relay contact closed but circuit breaker not yet open). A continuous state of this condition is only possible when the trip circuit has been in- terrupted, a short-circuit exists in the trip circuit, a loss of battery voltage occurs, or malfunctions occur with the circuit breaker mechanism.
Page 172 2 Functions Figure 2-51 Principle of trip circuit monitoring with one binary input In normal operation, the binary input is energized when the trip relay contact is open and the trip circuit is healthy (logic state „H“), as the monitoring circuit is closed via the auxiliary contact (if the circuit breaker is closed) or via the substitute resistor R.
Page 173: Setting Notes
2.17 Trip Circuit Supervision 2.17.2 Setting Notes This function is only effective and available if address 140 Trip Cir. Sup. has General been set to Enabled during configuration. If you do not want to use the trip circuit supervision, set Disabled. The trip circuit supervision can be switched ON or OFF in address 4001 FCT TripSuperv..
Page 174: Protection Function Control
2 Functions 2.18 Protection Function Control The function logic coordinates the sequence of both the protective and ancillary func- tions, processes the functional decisions, and data received from the system. 2.18.1 General The following is included in the function logic: - Pickup logic - Tripping logic - Fault display at the LEDs/LCD...
Page 175 2.18 Protection Function Control tiated by the internal automatic reclosure function is interpreted as a manual reclosure, even it has been initiated by a control command from the device. Figure 2-54 Manual closure with internal automatic reclosure Circuit breaker Circuit breaker close coil CBaux Circuit breaker auxiliary contact If, however, external close commands which should not activate the manual close...
Page 176: Detection Of The Circuit Breaker Position
2 Functions Figure 2-55 Manual closing with external automatic reclosure device Circuit breaker Circuit breaker close coil CBaux Circuit breaker auxiliary contact Depending on the configuration of the distance protection, an undelayed trip command can be generated after energisation for each pickup or for pickup in . The line energisation recognition function is also used by the stages of the overcurrent pro- tection.
Page 177: Pickup Logic For The Entire Device
2.18 Protection Function Control 2.18.1.3 Pickup Logic for the Entire Device Pickup Indications The fault detection logic combines the fault detection (pick-up) signals of all protection functions. The group alarms „Relay PU“ and„Protection PU“ are available re- spectively for a general device pickup and a general pickup of the protection functions. The above indications can be allocated to LEDs or output relays.
Page 178: Tripping Logic Of The Entire Device
2 Functions 2.18.1.4 Tripping Logic of the Entire Device TRIP Command Just like for pickup, a group alarm exists for the device TRIP command. The alarm „Relay TRIP“ is an OR combination of • All trip signals of the individual protection functions •...
Page 179 2.18 Protection Function Control Figure 2-57 Reclosure interlocking Conditions which cause reclosure interlocking and control commands which have to be interlocked can be set individually. The two inputs and the output can be wired via the correspondingly allocated binary inputs and outputs or be linked via user-defined logic functions (CFC).
Page 180 2 Functions taken into consideration when configuring the protection functions (address 133 Auto Reclose). This contact is also opened when closing the breaker via the binary input „>Manual Close“ (FNo. 356), so that no breaker alarm can pass there either. Further optional closing commands which are not sent via the device cannot be taken into consideration.
Page 181 2.18 Protection Function Control Figure 2-59 Breaker tripping alarm suppression — sequence examples Trip-Dependent In- The recording of indications masked to local LEDs, and the maintenance of spontane- dications ous indications, can be made dependent on whether the device has issued a trip signal.
Page 182: Pickup Of The Automatic Test Unit For The Overhead Contact Line (Only For 16.7 Hz)
2 Functions 2.18.1.5 Pickup of the Automatic Test Unit for the Overhead Contact Line (only for 16.7 Hz) For the pickup of the automatic test unit for the overhead contact line, the indication „Pckup TstUnit“ (FNo. 1191) is available in the 7ST6. This indication is output on one of the following events: •...
Page 183: Setting Notes
2.18 Protection Function Control The figure below shows the logic diagram for this: Figure 2-61 Start of the automatic overhead contact line check following TRIP commands by the overload protection 2.18.1.6 Setting Notes The setting of the minimum trip signal duration TMin TRIP CMD (address 240) was Command Duration already discussed in Subsection 2.1.3.
Page 184: Testing
2 Functions 2.18.2 Testing The numerical overhead contact line protection 7ST6 allows an easy check of the trip circuits and the circuit breakers. 2.18.2.1 Functional Description The test programs as shown in Table 2-8 are available. The output alarms mentioned must be allocated to the relevant command relays that are used for controlling the circuit breaker coils.
Page 185: Setting Notes
2.18 Protection Function Control 2.18.2.2 Setting Notes The set times are those stated in Subsection 2.1.3.1 under margin heading „Manual Close“. 2.18.2.3 Information List Information Type of In- Comments formation CB-T T M CB-Test:TRIP command main trip element CB-T T B CB-Test:TRIP command backup trip element CB-T T/C M CB-Test: trip/close main trip element...
Page 186: Auxiliary Functions
2 Functions 2.19 Auxiliary Functions The general functions of the device are described in chapter "Additional Functions". 2.19.1 Message Processing After the occurrence of a system fault, data regarding the response of the protective relay and the measured quantities should be saved for future analysis. For this reason indications are processed in three ways.
Page 187 2.19 Auxiliary Functions In all other respects, the properties of the fast binary outputs are the same as the general properties of the binary outputs described above. Information on the Events and conditions can be read out on the display on the front cover of the relay. Integrated Display Using the front PC interface or the rear service interface, for instance, a personal com- (LCD) or to a Per-...
Page 188 2 Functions To influence information at the system interface during test mode („Test mode“ and „Transmission block“) a CFC logic is required. Default settings already include this logic (see Appendix). ® The SIPROTEC 4 System Description describes in detail how to activate and deac- tivate test mode and blocked data transmission.
Page 189 2.19 Auxiliary Functions Spontaneous Indi- After a fault, the most important data of the fault are displayed automatically without cations any further operating actions in the sequence displayed below after a general device pickup: Figure 2-63 Spontaneous indications for devices with a small display Retrievable Indica- The indications of the last eight faults can be retrieved and output.
Page 190: Measurement
2 Functions 2.19.2 Measurement 2.19.2.1 Functional Description Display of Mea- For local retrieval, or for data transmission via system interface, measured values and sured Values resulting computed values are continuously available. The operational measured values can be read out as secondary, primary or percent values. The measured values can only be correctly displayed if the transformer ratings are entered completely and correctly.
Page 191: Information List
2.19 Auxiliary Functions 2.19.2.2 Information List Information Type of In- Comments formation Udif= U - Difference (line - reference) Uline= U - Line Uref= U - Reference P (active power) Q (reactive power) Freq= Frequency fref= f - Reference fdif= f - Difference (line-reference) ϕ-diff= Angle (difference line-bus)
Page 192: Statistics
2 Functions 2.19.3 Statistics The number of trips initiated by 7ST6, the accumulated interrupted currents resulting from trips initiated by protection functions and the number of close commands initiated by the auto-reclosure function are counted. 2.19.3.1 Functional Description Counters and Mem- The counters and memories of the statistics are saved by the device.
Page 193: Setting Notes
2.19 Auxiliary Functions 2.19.3.2 Setting Notes ® Readout/Set- The SIPROTEC 4 System Description describes how to read out the statistical ® ting/Resetting counters using the device front panel or DIGSI . Setting or resetting of these statistical counters takes place under the menu item Annunciation -> STATISTIC by overwrit- ing the counter values displayed.
Page 194: Command Processing
2 Functions 2.20 Command Processing The SIPROTEC 4 7ST6 includes a command processing function for initiating switch- ing operations in the system. Control commands can originate from four command sources: • Local operation using the keypad on the local user interface of the device •...
Page 195: Sequence In The Command Path
2.20 Command Processing 2.20.1.2 Sequence in the Command Path Security mechanisms in the command path ensure that a switch command can be carried out only if the test of previously established criteria has been successfully com- pleted. Additionally, user-defined interlocking conditions can be configured separately for each device.
Page 196: Interlocking
2 Functions 2.20.1.3 Interlocking Interlocking can be executed by the user-defined logic (CFC). Switchgear interlocking checks in a SICAM/SIPROTEC 4 system are normally divided in the following groups: • System interlocking checked by a central control system (for interbay interlocking), •...
Page 197 2.20 Command Processing The plus sign indicated in the indication is a confirmation of the command execution: The command output has a positive result, as expected. A minus sign means a neg- ative, i.e. an unexpected result; the command was rejected. Figure 2-64 shows an example in the operational indications command and feedback of a positively run switching action of the circuit breaker.
Page 198 2 Functions Figure 2-65 Standard interlockings Source of Command REMOTE includes LOCAL. LOCAL Command using substation controller REMOTE Command via telecontrol station to power system management and from power system management to the device The display shows the configured interlocking reasons. The are marked by letters as explained in Table 2-11.
Page 199: Information List
2.20 Command Processing Figure 2-66 Example of configured interlocking conditions Control Logic via For the bay interlocking, an enabling logic can be structured using the CFC. Via spe- cific release conditions the information „released“ or „bay interlocked“ are available, e.g. object „52 Close“ and „52 Open“ with the data values: ON / OFF). 2.20.1.4 Information List Information Type of In-...
Page 200: Control Device
2 Functions 2.20.2 Control Device 2.20.2.1 Information List Information Type of In- Comments formation Breaker CF_D12 Breaker Breaker Breaker Disc.Swit. CF_D2 Disconnect Switch Disc.Swit. Disconnect Switch EarthSwit CF_D2 Earth Switch EarthSwit Earth Switch Brk Open IntSP Interlocking: Breaker Open Brk Close IntSP Interlocking: Breaker Close Disc.Open...
Page 201: Process Data
2.20 Command Processing 2.20.3 Process Data During the processing of commands, independently of the further allocation and pro- cessing of indications, command and process feedbacks are sent to the indication pro- cessing. These indications contain information on the cause. With the corresponding allocation (configuration) these indications are entered in the event log, thus serving as a report.
Page 202: Protocol
2 Functions 2.20.4 Protocol 2.20.4.1 Functional Description The following protocols are available for communication with the control system via the system interface: • IEC 60870-5-103 • PROFIBUS FMS • PROFIBUS DP • Modbus • DNP 3.0 Note ® A description of the profiles and the mapping files are included on the DIGSI 7ST6 Manual E50417-G1176-C251-A3...
Page 203: Measured Value Overview
2.20 Command Processing 2.20.4.2 Measured value overview Depending on the device components (1– or 3–transformer), different measured values may be displayed, for example, via the IEC 60870-5–103 protocol. The follow- ing table presents an overview. 1–transformer device Type Name 13917 ϕ...
Page 204: Information List
2 Functions 3–transformer device Type Name 13921 IF- = 13923 IX = 13920 UF- = 13922 Uref = 13921 IF- = 13923 IX = 13920 UF- = 13922 Uref = 13917 ϕ = 13918 Tline = Tline = ϕ = 13918 13917 2.20.4.3 Information List...
Page 205: Use In Auto-Transformer Systems
2.21 Use in auto-transformer systems 2.21 Use in auto-transformer systems This function is optional, i.e. not included in all device variants. The system 2x15 kV (or 2x25 kV) is used increasingly in a.c. power traction networks to enhance the transmission properties. Additional auto-transformers and a return line - negative feeder - of 15 kV (or 25 kV) potential are characteristic of this type of infeed.
Page 206: Setting Notes
2 Functions 2.21.2 Setting Notes ® General In DIGSI double-click on Settings to display the relevant selection. A dialog box with the tabs General, Transformer data, System data, Voltage transformers and Circuit breaker will open under Power System Data 1, in which you can configure the in- dividual parameters.
Page 207: Mounting And Commissioning
Mounting and Commissioning This chapter is primarily intended for experienced commissioning engineers. The commissioning engineer must be familiar with the commissioning of protection and control systems, with the management of power systems and with the relevant safety rules and guidelines. Under certain circumstances adaptations of the hardware to the particular power system data may be necessary.
Page 208: Mounting And Connections
3 Mounting and Commissioning Mounting and Connections General WARNING! Warning of improper transport, storage, installation or erection of the device. Failure to observe these precautions can result in death, personal injury or substantial property damage. The successful and safe operation of this device is dependent on proper handling, storage, installation, operation, and maintenance.
Page 209 3.1 Mounting and Connections Changing Setting If binary inputs are used to change setting groups, please observe the following: Groups • Two binary inputs must be dedicated to the purpose of changing setting groups when four groups are to be switched. One binary input must be set for „>Set Group Bit0“, the other input for „>Set Group Bit1“.
Page 210 3 Mounting and Commissioning breaker auxiliary contact (Aux1) is open and the trip contact has dropped out. The value of this resistor must be such that in the circuit breaker open condition (therefore Aux1 is open and Aux2 is closed) the circuit breaker trip coil (TC) is no longer picked up and binary input (BI1) is still picked up if the command relay contact is open.
Page 211 3.1 Mounting and Connections For power consumption of the resistance: Example: ® 1.8 mA (SIPROTEC 4 7ST6) BI (HIGH) 19 V for delivery setting for nominal voltages of 24/48/60 V (from the BI min 7ST6); 88 V for delivery setting for nominal voltage 110/125/220/250 V (from device 7ST6);...
Page 212: Hardware Modifications
3 Mounting and Commissioning 3.1.2 Hardware Modifications 3.1.2.1 General A subsequent adaptation of the hardware to the power system conditions can, for ex- ample, become necessary with regard to the control voltage for binary inputs or the termination of bus-capable interfaces. Follow the procedure described in this section, whenever hardware modifications are done.
Page 213: Disassembly
3.1 Mounting and Connections cessor module C-CPU-2 is described in the following sections under „Processor Board C-CPU-2“ and on the interface modules under „RS485 Interface“ and „PROFIBUS In- terface“. Both jumpers must be plugged in the same way. On delivery of the device, the terminating resistors are switched ON. Spare Parts Spare parts can be the battery for storage of data in the battery-buffered RAM in case of a power failure, and the internal power supply miniature fuse.
Page 214 3 Mounting and Commissioning • Remove the caps on the front cover of the device and withdraw the then accessible screws. • Remove the front cover and tilt it to the side. With device versions with a detached operator panel it is possible to remove the front cover of the device right after having unscrewed all screws.
Page 215 3.1 Mounting and Connections Figure 3-3 Front view with housing size after removal of the front cover (simplified and scaled down) Figure 3-4 Front view with housing size after removal of the front cover (simplified and scaled down) 7ST6 Manual E50417-G1176-C251-A3...
Page 216: Switching Elements On Printed Circuit Boards
3 Mounting and Commissioning 3.1.2.3 Switching Elements on Printed Circuit Boards Processor Board C- The PCB layout of the processor board C–CPU-2 is illustrated in the following figure. CPU-2 The set rated voltage of the integrated power supply is checked according to Table 3- 2, the quiescent state of the life contact according to Table 3-3, the selected pickup voltages of the binary inputs BI1 to BI5 according to Table 3-4 and the integrated RS232 / RS485 interface according to Table 3-5 to 3-7.
Page 217 3.1 Mounting and Connections Table 3-2 Jumper setting of the rated voltage of the integrated Power Supply on the C- CPU-2 processor board Jumper Rated Voltage 24 to 48 VDC 60 to 125 VDC 110 to 250 VDC Not used Not used 1-2 and 3-4 Not used...
Page 218 3 Mounting and Commissioning Jumper setting 2-3: The connection to the modem is usually established with a star coupler or fibre-optic converter. Therefore the modem control signals according to RS232 standard DIN 66020 are not available. Modem signals are not required since ®...
Page 219 3.1 Mounting and Connections C-I/O-7 Input/Out- The P.C.B layout for the C-I/O-7 input/output board is shown in Figure 3-7. put Board(s) Figure 3-7 Input/output board C–I/O-7 with representation of the jumper settings required for the board configuration Depending on the device version the contacts of some binary outputs can be changed from from normally open to normally closed (see Appendix, under section A.2).
Page 220 3 Mounting and Commissioning Table 3-8 Jumper setting for the Contact Mode of the relays for BO14, BO15, BO25 and BO26 or BO9, BO10, BO20 and BO21 on the input/output board C-I/O-7 with housing size Device 7ST61* Printed Circuit Jumper Open in Quiescent Closed in Quiescent State Factory Board...
Page 221 3.1 Mounting and Connections BI7 to BI12 (with housing size slot 19, and with housing size slot 19 right side) according to Table 3-11. Table 3-11 Jumper settings of Pickup Voltages of the binary inputs BI7 to BI12 on the in- put/output board C-I/O-7 Binary Inputs Jumper...
Page 222 3 Mounting and Commissioning Board C-I/O-12 The PCB layout for the C-I/O-12 input/output board is shown in Figure 3-8. Figure 3-8 C-I/O-12 input/output board with representation of jumper settings required for checking configuration settings Table 3-13 Jumper setting for the Contact Mode of the relays for BO4 and BO5 on the in- put/output board C-I/O-12 with housing size Device 7ST61*1/5 Printed Circuit...
Page 223 3.1 Mounting and Connections Table 3-14 Jumper settings of Pickup Voltages of the binary input BI6 on the input/output board C-I/O-12 Binary Input Jumper Threshold 19 V Threshold 88 V Threshold 176 V Factory settings for devices with rated power supply voltages 24 VDC to 125 VDC Factory settings for devices with rated power supply voltages 110 VDC to 250 VDC Use only with pickup voltages 220 to 250 VDC Jumpers X71, X72 and X73 on the input/output board C-I/O-12 are used to set the bus...
Page 224 3 Mounting and Commissioning C-I/O-13 Input/Out- put Board Figure 3-9 C-I/O-13 input/output board with representation of jumper settings required for checking configuration settings Table 3-16 Jumper settings of Pickup Voltages of the binary input BI6 on the input/output board C-I/O-13 Binary Input Jumper Threshold 19 V Threshold 88 V...
Page 225 3.1 Mounting and Connections Mounting location: with housing size in Figure 3-3, slot 33 with housing size in Figure 3-4, slot 33 right side; Table 3-17 Jumper settings of Bus Address of the input/output board C-I/O-13 Jumper Factory Setting A0 X71 1-2 (H) A1 X72 2-3 (L)
Page 226 3 Mounting and Commissioning Input/Output Board The PCB layout for the B-I/O-2 input/output board is shown in Figure 3-10. B-I/O-2 Figure 3-10 Input/output board B-I/O-2 with jumper settings required for the board configu- ration (representation of the jumpers X71, X72 and X73 for housing size Checking the control voltages of the binary inputs: BI13 to BI38 (with housing size ) according to Table3-19.
Page 227 3.1 Mounting and Connections Table 3-19 Jumper settings for the Pickup Voltages of the binary inputs BI13 to BI38 on the B–I/O-2 board for model 7ST63* Binary Inputs Jumper Threshold 19 V Threshold 88 V Slot 33 left Slot 19 left side side BI13...
Page 228: Interface Modules
3 Mounting and Commissioning 3.1.2.4 Interface Modules Exchanging Inter- The interface boards are located on the C–CPU-2 board (in Figures 3-3 and 3-4). face Modules Figure 3-11 C-CPU-2 board with interface module Please note the following: • The interface modules can only be replaced in devices for panel flush mounting and cubicle mounting.
Page 229 3.1 Mounting and Connections Table 3-21 Exchangeable Interface Modules Interface Mounting Location / Port Exchange Module Only interface modules that can System interface be ordered in our facilities via the order key (see also Appendix, Section A.1). The order numbers of the exchange modules can be found in the Appendix in Section A.1, Accessories.
Page 230 3 Mounting and Commissioning Jumper setting 1-2: This setting makes the modem signals available, i. e. for a direct ® RS232 connection between the SIPROTEC 0.4 device and the modem this setting can be selected optionally. We recommend to use a standard RS232 modem connec- tion cable (converter 9-pin to 25-pin).
Page 231: Reassembly
3.1 Mounting and Connections Termination For bus-capable interfaces a termination is necessary at the bus for each last device, i.e. terminating resistors must be connected. With the 7ST6 device, this concerns the variants with RS485 or PROFIBUS interfaces. The terminating resistors are located on the RS485 or PROFIBUS interface module, which is on the board C-CPU-2 (No.1 in Figure 3-3 to 3-4), or directly on the PCB of the processor board C-CPU-2 (see margin heading „Processor Board C-CPU-2“, Table 3-7).
Page 232: Mounting
3 Mounting and Commissioning 3.1.3 Mounting 3.1.3.1 Panel Flush Mounting Depending on the version, the device housing can be . For the housing size (Figure 3-16) there are four covers and four holes. For the housing size (Figure 3- 17) there are six covers and six holes. •...
Page 233: Rack And Cubicle Mounting
3.1 Mounting and Connections Figure 3-17 Example of panel flush mounting of a device (housing size 3.1.3.2 Rack and Cubicle Mounting 2 mounting brackets are required for incorporating a device in a rack or cubicle. The order number is given in the Appendix, Subsection A.1. For the housing size (Figure 3-18), there are four covers and four holes.
Page 234 3 Mounting and Commissioning Figure 3-18 Mounting device in a rack or cubicle (housing size 7ST6 Manual E50417-G1176-C251-A3...
Page 235 3.1 Mounting and Connections Figure 3-19 Example of rack or cubicle mounting of a device (housing size 7ST6 Manual E50417-G1176-C251-A3...
Page 236: Checking Connections
3 Mounting and Commissioning Checking Connections 3.2.1 Checking Data Connections of Serial Interfaces The following tables illustrate the pin assignment of the various serial device interfaces and of the time synchronization interface. The position of the connections can be seen in the following figure.
Page 237 3.2 Checking Connections Termination The RS485 interface is capable of half-duplex operation with signals A/A' and B/B' with the common reference potential C/C' (GND). It is necessary to check that the termi- nating resistors are connected to the bus only at the last unit, and not at other devices on the bus.
Page 238: Checking System Connections
3 Mounting and Commissioning 3.2.2 Checking System Connections WARNING! Warning of hazardous voltages Non-observance of the following measures can result in death, personal injury or sub- stantial property damage. Only qualified people who are familiar with and observe the safety procedures and precautionary measures shall perform the inspection steps.
Page 239 3.2 Checking Connections • The short-circuit feature of the current circuits of the device is to be checked. This may be performed with an ohmmeter or other test equipment for checking continu- ity. Make sure that terminal continuity is not wrongly simulated in reverse direction via current transformers or their short circuit links.
Page 240: Commissioning
3 Mounting and Commissioning Commissioning WARNING! Warning of hazardous voltages when operating electrical devices Non-observance of the following measures can result in death, personal injury or sub- stantial property damage. Only qualified people shall work on and around this device. They must be thoroughly familiar with all warnings and safety notices in this instruction manual as well as with the applicable safety steps, safety regulations, and precautionary measures.
Page 241: Test Mode And Transmission Block
3.3 Commissioning WARNING! Warning of dangers evolving from improper primary tests Non-observance of the following measure can result in death, personal injury or sub- stantial property damage. Primary tests may only be carried out by qualified persons who are familiar with com- missioning protection systems, with managing power systems and the relevant safety rules and guidelines (switching, earthing etc.).
Page 242: Testing System Interfaces
3 Mounting and Commissioning 3.3.3 Testing System Interfaces Prefacing Remarks If the device features a system interface and uses it to communicate with the control ® centre, the DIGSI device operation can be used to test if indications are transmitted correctly.
Page 243 3.3 Commissioning Figure 3-21 System interface test with dialog box: Generate Indications — example Changing the Oper- On clicking one of the buttons in the column Action you will be prompted for the pass- ating State word No. 6 (for hardware test menus). After you have entered the password correctly you can send the indications individually.
Page 244: Checking The Binary Inputs And Outputs
3 Mounting and Commissioning 3.3.4 Checking the Binary Inputs and Outputs ® Prefacing Remarks The binary inputs, outputs, and LEDs of a SIPROTEC 4 device can be individually ® and precisely controlled in DIGSI . This feature is used e.g. to check the correct con- nection to the system during commissioning.
Page 245 3.3 Commissioning Figure 3-22 Test of the binary inputs and outputs – example Changing the Oper- To change the operating state of a hardware component, click on the associated ating State button in the Scheduled column. Before executing the first change of the operating state the password No. 6 is demand- ed (provided that it has been activated).
Page 246 3 Mounting and Commissioning Test of the Binary To test the wiring between the system and the binary inputs of the protection device, Inputs the condition in the system which initiates the binary input must be generated and the response of the device checked. To do so, open the dialog box Hardware Test again to view the physical position of the binary input.
Page 247: Tests For Circuit Breaker Failure Protection
3.3 Commissioning 3.3.5 Tests for Circuit Breaker Failure Protection General If the device provides a breaker failure protection and if this is used, the integration of this protection function in the system can be tested under practical conditions. Because of the manifold application facilities and various configuration possibilities of the system it is not possible to give a detailed description of the necessary test steps.
Page 248: Current And Voltage Test
3 Mounting and Commissioning 3.3.6 Current and Voltage Test Load Current ≥ The connections of the current and voltage transformers are tested using primary [10% I N ] quantities. Secondary load current of at least 10 % of the nominal current of the device is necessary.
Page 249: Direction Check With Load Current
3.3 Commissioning 3.3.7 Direction Check with Load Current Load Current ≥ The correct connection of the current and voltage transformers is tested via the pro- [10% I N ] tected line using the load current. For this purpose, connect the line. The load current the line carries must be at least 0.1 ·...
Page 250: Measuring The Operating Time Of The Circuit Breaker
3 Mounting and Commissioning 3.3.8 Measuring the Operating Time of the Circuit Breaker Only for Synchro- If the device is equipped with the function for synchronism and voltage check and it is nism Check applied, it is necessary - under asynchronous system conditions - that the operating time of the circuit breaker is measured and set correctly when closing.
Page 251: Trip And Close Test With The Circuit Breaker
3.3 Commissioning 3.3.10 Trip and Close Test with the Circuit Breaker The circuit breaker and tripping circuits can be conveniently tested by the device 7ST6. ® The procedure to do so is described in detail in the SIPROTEC System Description. If the check does not produce the expected results, the cause may be established from the text in the display of the device or the PC.
Page 252 3 Mounting and Commissioning ® Start Triggering Os- To trigger test measurement recording with DIGSI , click on Test in the left part of the cillographic Re- window. Double-click in the list view the entry Test Wave Form (see Figure 3-25). cording ®...
Page 253: Final Preparation Of The Device
3.4 Final Preparation of the Device Final Preparation of the Device The used terminal screws must be tightened, including those that are not used. All the plug connectors must be correctly inserted. Caution! Do not apply force! The tightening torques must not be exceeded as the threads and terminal chambers may otherwise be damaged! The setting values should be checked again, if they were changed during the tests.Check if protection, control and auxiliary functions to be found with the configu-...
Page 254 3 Mounting and Commissioning 7ST6 Manual E50417-G1176-C251-A3...
Page 255: Technical Data
Technical Data ® This chapter provides the technical data of the device SIPROTEC 4 7ST6 and its in- dividual functions, including the limiting values that under no circumstances may be exceeded. The electrical and functional data for the maximum functional extent are fol- lowed by the mechanical specifications with dimension diagrams.
Page 256: General
4 Technical Data General 4.1.1 Analog Inputs and Outputs Rated system frequency 16.7 (depending on ordered version, or settable) 25, 50 or 60 Hz Current Inputs Rated current 1 A or 5 A Measuring range 100 I for I ≤ I Error limits 1% of I 1% of I for I >...
Page 257: Auxiliary Voltage
4.1 General 4.1.2 Auxiliary Voltage DC Voltage Voltage supply via integrated converter Rated auxiliary voltage U 24/48 VDC 60/110/125 VDC 110/125/220/250 V Admissible voltage ranges 19 to 58 VDC 48 to 150 VDC 88 to 300 VDC Admissible AC ripple voltage, ≤15 % of the auxiliary voltage peak to peak Power input...
Page 258: Communication Interfaces
4 Technical Data Output Relays Signalling/trip relays (see also terminal assignments in Appendix A) Number and information According to the order variant (configurable) Order variant NO contact (normal) NO/NC contact (select- Fast digital output BO1 and able) 7ST61*3/7 7ST61*1/5 7ST63* Switching capability 1000 W or VA except for: BO23-BO26...
Page 259 4.1 General Service / Modem Interface (optional) RS232/RS485/FO Isolated interface for data transfer Acc. to ordered variant ® Operation With DIGSI RS232/RS485 RS232/RS485 according to ordered variant Connection for flush-mounted housing Rear panel, mounting location „C“, 9-pin D-subminiature female connector Test voltage 500 V;...
Page 260 4 Technical Data Fibre optic cable (FO) FO connector type ST connector Connection for panel flush-mounted Rear panel, mounting location „B“ housing Connection for panel surface-mounted In console housing on bottom housing λ = 820 nm Optical wavelength Laser Class 1 according to EN 60825-1/-2 Using glass fibre 50/125 µm or using glass fibre 62.5/125 µm Permissible optical link signal attenuation Max.
Page 261 4.1 General MODBUS FO FO connector type ST connector transmitter/receiver Connection for panel flush-mounted Rear panel, mounting location "B" housing For panel surface-mounted housing In console housing on bottom Transmission speed Up to 19,200 Baud λ = 820 nm Optical wavelength Using glass fibre 50/125 µm or using glass Laser Class 1 according to EN 60825–1/–...
Page 262: Electrical Tests
4 Technical Data Operating Modes for Time Tracking Internal Internal synchronization using RTC (default) IEC 60870–5–103 Rear panel, mounting location „A“; 9-pin D-subminiature female connector Time signal IRIG B At two-tier terminals on housing bottom Time signal DCF77 Selectable 5 V, 12 V or 24 V Time signal Sync.
Page 263: Mechanical Stress Tests
4.1 General Impulse: 1.2/50 µs High Energy Surge Voltages (SURGE), IEC 61000- 4-5 Installation Class 3 Common mode: 2 kV; 12 Ω; 9 µF Auxiliary voltage Diff. mode: 1 kV; 2 Ω; 18 µF Common mode: 2 kV; 42 Ω; 0.5 µF Measuring Inputs, Binary Inputs and Diff.
Page 264: Climatic Stress Tests
On 56 days of the year up to 93% relative humidity. Conden- sation must be avoided in operation! Siemens recommends that all devices be installed so that they are not exposed to direct sunlight nor subject to large fluctuations in temperature that may cause condensation to occur.
Page 265: Service Conditions
4.1 General 4.1.8 Service Conditions The protection device is designed for installation in normal relay rooms and plants, so that electromagnetic compati- bility (EMC) is ensured if installation is done properly. In addition, the following are recommended: • All contactors and relays that operate in the same cubicle, cabinet, or relay panel as the numerical protective device should, as a rule, be equipped with suitable surge suppression components.
Page 266: Distance Protection
4 Technical Data Distance Protection Distance Measurement Characteristic Polygonal or combined Setting ranges > = min. current, phases for I = 1 A 0.10 A to 2.00 A 0.1 to 2.0 * I for I = 5 A 0.50 A to 10.00 A = 1 A 0.2 Ω...
Page 267 4.2 Distance Protection Times Shortest trip time 40 ms at 16.7 Hz 35 ms at 25 Hz 25 ms at 50/60 Hz Dropout time 80 ms at 16.7 Hz 60 ms at 25 Hz 30 ms at 50/60 Hz SI Time Man.Cl Operating time for manual close 0.01 s to 30.00 s Increments 0.01 s signal...
Page 268: Time Overcurrent Protection
4 Technical Data Time Overcurrent Protection Very High Set Current Stage, High Set Current Stage and Definite-time Overcurrent Stage 0.10 A to 25.00 A; ∞ Pickup value I Increments 0.01 A 0.00 s to 30.00 s; ∞ Delay time T I Increments 0.01 s ≥...
Page 269 4.3 Time Overcurrent Protection Tolerances ≥ I Currents 5 % of setting value for I 1 % of setting value, at least 10 ms Times With high-speed overcurrent protec- 1 % of setting value, at least 3 ms tion IDMT Pickup/dropout thresholds I 2 % of set value or 10 mA for I = 1 A...
Page 270 4 Technical Data Trip Time Characteristics ANSI 7ST6 Manual E50417-G1176-C251-A3...
Page 271 4.3 Time Overcurrent Protection Figure 4-1 Trip Time Characteristics of the Inverse-time Overcurrent Protection, acc. to ANSI/IEEE 7ST6 Manual E50417-G1176-C251-A3...
Page 272 4 Technical Data Figure 4-2 Trip Characteristics of the Inverse-time Overcurrent Protection, as per IEC 7ST6 Manual E50417-G1176-C251-A3...
Page 273 4.3 Time Overcurrent Protection Figure 4-3 Trip Time Characteristics of the Inverse-time Overcurrent Protection, acc. to ANSI/IEEE 7ST6 Manual E50417-G1176-C251-A3...
Page 274: Voltage Protection (Optional)
4 Technical Data Voltage Protection (optional) Overvoltage Protection U>> Stage 20.0 V to 170.0 V; ∞ Pickup value U>> Increments 1 V 0.00 s to 60.00 s; ∞ Delay time T Increments 0.01 s U>> Dropout to pickup ratio U 0.50 to 0.95 Increments 0.01 >>Dropout...
Page 275: Thermal Overload Protection
4.5 Thermal Overload Protection Thermal Overload Protection Setting Ranges Factor k ITRise = ITRise / I (continuous limit current) 0.10 to 4.00 Increments 0.01 Time constant TAU 2.0 min to 30.0 min Increments 0.1 min (6 s) Final temperature rise TRise (for continuous limit cur- 0 to 100 K Increments 1 K rent)
Page 276: Circuit Breaker Failure Protection (Optional)
4 Technical Data Circuit Breaker Failure Protection (optional) Circuit Breaker Monitoring Current flow monitoring For I = 1 A 0.05 A to 20.00 A Increments 0.01 A For I = 5 A 0.25 A to 100.00 A Dropout to pickup ratio Approx.
Page 277: Defrosting Protection (Depending On Device Version)
4.7 Defrosting Protection (depending on device version) Defrosting Protection (depending on device version) Defrosting Protection Characteristic ID> 0.10 to 2.00 I/IN (referred to I) Increments 0.01 I/IN k: 0.00 to 0.80 Increments 0.01 0.00 to 30.00 s; ∞ Delay time T ID> Increments 0.01 ≥...
Page 278: Automatic Reclosure Function (Optional)
4 Technical Data Automatic Reclosure Function (optional) General AR Function Number of reclosures Max. 8, the first 2 with individual parameters optionally 1 with SOTF-O/C Polarization 1-pole Control With TRIP Command Action times 0.01 s to 300.00 s 2 separate parameters for cycle 1 and 2-8 Dead times prior to reclosure 0.01 s to 1800.00 s 2 separate parameters for cycle 1 and 2-8...
Page 279: Synchronism And Voltage Check (Optional And Depending On Device Version)
4.10 Synchronism and Voltage Check (optional and depending on device version) 4.10 Synchronism and Voltage Check (optional and depending on device version) Operating Modes Operating modes Synchro check with automatic reclosure Dead line / live bus Dead bus / live line Dead bus and dead line Bypassing Or combination of the above...
Page 280: Fault Locator (Optional)
4 Technical Data 4.11 Fault Locator (optional) General Start With trip command or dropout 0.05 to 50.00 Ω/km Reactance (secondary) In km or miles Line length 1.0 to 200.0 km 0.08 to 80.00 Ω/mile Reactance (secondary) Line length 0.6 to 124.0 miles In Ω...
Page 281: User Defined Functions (Cfc) (Optional)
4.15 User Defined Functions (CFC) (optional) 4.15 User Defined Functions (CFC) (optional) Function Modules and Possible Assignments to Task Levels Explanation Task Level Function Module MV_PROC PLC1_PROC PLAN_BEARB S_BEARB ABSVALUE Magnitude Calculation Addition AND - Gate BOOL_TO_CO Boolean to Control (conversion) BOOL_TO_DI Boolean to Double Point...
Page 282 4 Technical Data General Limits Description Limit Comment Maximum number of all CFC charts considering all task When the limit is exceeded, an error in- levels dication is output by the device. Conse- quently, the device starts monitoring. The red ERROR LED lights up. Reduce the number of CFC charts until they are below the limit again.
Page 283 4.15 User Defined Functions (CFC) (optional) Maximum Number of TICKS in the Task Levels Task Level Limit in TICKS MW_BEARB (Measured value processing) 10 000 PLC1_BEARB (Slow PLC processing) 1 900 PLC_BEARB (Fast PLC processing) SFS_BEARB (Switchgear interlocking) 10 000 When the sum of TICKS of all blocks exceeds the limits before-mentioned, an error indication is output by CFC.
Page 284: Auxiliary Functions
4 Technical Data 4.16 Auxiliary Functions Measured Values Operational measured values for currents I, IX, IF in A primary and secondary, and in % I for I ≤ I Tolerance 1 % of I and 1 % of I for I > I Operational measured values for voltages U, UF, URef in kV primary, in V secondary or in % U for U ≤...
Page 285 4.16 Auxiliary Functions Statistics Number of trip events caused by device Number of reclosure events caused by device Separately for 1st AR cycle and for all further cycles Total of interrupted currents Summated It Summated I Last It Last I Maximum interrupted current in A;...
Page 286: Dimensions
4 Technical Data 4.17 Dimensions 4.17.1 Housing for Panel Flush Mounting or Cubicle Mounting (Size Figure 4-4 Dimensional drawing of a 7ST6 for panel flush or cubicle mounting (housing size 7ST6 Manual E50417-G1176-C251-A3...
Page 287: Housing For Panel Flush Mounting Or Cubicle Mounting (Size 1 / 1 )
4.17 Dimensions 4.17.2 Housing for Panel Flush Mounting or Cubicle Mounting (Size Figure 4-5 Dimensional drawing of a 7ST6 for panel flush or cubicle mounting (housing size ■ 7ST6 Manual E50417-G1176-C251-A3...
Page 288 4 Technical Data 7ST6 Manual E50417-G1176-C251-A3...
Page 289: Appendix
Appendix This appendix is primarily a reference for the experienced user. This section provides ordering information for the models of this device. Connection diagrams for indicating the terminal connections of the models of this device are included. Following the general diagrams are diagrams that show the proper connections of the devices to primary equipment in many typical power system configurations.
Page 290: Ordering Information And Accessories
A Appendix Ordering Information and Accessories A.1.1 Ordering Information A.1.2 Accessories Voltage Transform- Nominal Values Order Number er Miniature Circuit Thermal 1.6 A; magnetic 6 A 3RV1611-1AG14 Breaker (VT mcb) Interface Modules Exchange Modules for Interfaces Order Number RS232 C53207-A351-D641-1 RS485 C73207-A351-D642-1 FO 820 nm...
Page 291 A.1 Ordering Information and Accessories Terminal Block Terminal block covering cap for block type Order Number Covering Caps 18-pole voltage terminal, 12-pole current terminal C73334-A1-C31-1 12-pole voltage terminal, 8-pole current terminal C73334-A1-C32-1 Short-Circuit Links Covering cap for terminal type Order Number Jumper-KIT: 3 jumpers for current terminal, 6 jumpers for voltage terminal C73334-A1-C40-1...
Page 292 A Appendix Display Editor Software for creating basic and power system control pic- tures. Option package of the complete version of DIGSI® Order Number Display Editor 4; Full version with license for 10 PCs 7XS5420-0AA0 Graphic Tools Graphical software to aid in the setting of characteristic curves and provide zone diagrams for overcurrent and dis- tance protective devices.
Page 293: Terminal Assignments
A.2 Terminal Assignments Terminal Assignments A.2.1 Panel Flush Mounting or Cubicle Mounting 7ST61*1/5 Figure A-1 Connection diagram for 7ST61*1/5 (panel flush mounted or cubicle mounted) 7ST6 Manual E50417-G1176-C251-A3...
Page 294 A Appendix 7ST61*3/7 Figure A-2 Connection diagram for 7ST61*3/7 (panel flush mounted or cubicle mounted) 7ST6 Manual E50417-G1176-C251-A3...
Page 295 A.2 Terminal Assignments 7ST63* Part 1 Figure A-3 Connection diagram for 7ST63 part 1 (panel flush mounted or cubicle mounted) 7ST6 Manual E50417-G1176-C251-A3...
Page 296 A Appendix 7ST63* Part 2 Figure A-4 Connection diagram for 7ST63 part 2 (panel flush mounted or cubicle mounted) 7ST6 Manual E50417-G1176-C251-A3...
Page 297: Connection Examples
A.3 Connection Examples Connection Examples A.3.1 Connection of Measured Values Figure A-5 Measured value connection in 7ST61*1/5 (single-phase) Figure A-6 Measured value connection in 7ST6**3/7 (single-phase) with synchro-check 7ST6 Manual E50417-G1176-C251-A3...
Page 298 A Appendix Figure A-7 Measured value connection in 7ST6**3/7 for auto-transformer systems Figure A-8 Measured value connection in 7ST6**3/7 for auto-transformer systems with synchro-check 7ST6 Manual E50417-G1176-C251-A3...
Page 299: Current Transformer Requirements
A.4 Current Transformer Requirements Current Transformer Requirements The requirements to the feeder current transformers are normally determined by the overcurrent protection, especially by the setting of the high-set stage. Furthermore, there is a minimum requirement, which is an experimental value. The recommendations for dimensioning are in accordance with IEC 60044-1.
Page 300: Default Settings
A Appendix Default Settings When the device leaves the factory, a large number of LED indications, binary inputs and outputs as well as function keys are already preset. They are summarised in the following table. A.5.1 LEDs Table A-1 LED Indication Presettings LEDs Allocated Func- Function No.
Page 301: Binary Input
A.5 Default Settings A.5.2 Binary Input Table A-2 Binary input presettings for all devices and ordering variants Binary Input Allocated Func- Function No. Description tion >FAIL:Feeder VT >Failure: Feeder VT (MCB tripped) >VT MCB UF 13951 >U feeder side VT MCB tripped >Reset LED >Reset LED >Dis.Z1 act.
Page 302: Binary Output
A Appendix A.5.3 Binary Output Table A-4 Output relay presettings for all devices and ordering variants Binary Output Allocated Func- Function No. Description tion Protection TRIP 13992 General protective TRIP of device With a 2-channel TRIP command control of the high- speed overcurrent protection function the BO2 is assigned...
Page 303: Function Keys
A.5 Default Settings Table A-8 Further output relay presettings for 7ST63* Binary Output Allocated Func- Function No. Description tion Dis.Trip Z1 3810 Dist.: Trip in Zone Z1 BO10 Dis. Trip Z2K 3930 Dist.: Trip in zone Z2 (short circuit) BO11 Dis.
Page 304: Default Display
A Appendix A.5.5 Default Display 4-line Display Table A-10 This selection is available as start page which may be configured. Page 1 Page 2 Page 3 Graphic Display Figure A-9 Default displays of a graphical display Note The above examples of basic displays may deviate, depending on the configuration, with regard to information contents and extent.
Page 305 A.5 Default Settings Spontaneous Dis- Spontaneous displays are fault indications which appear in the display automatically plays following a general fault detection or trip command of the device. In the case of 7ST6 they are the following: „S/E/F TRIP“: Protective function that tripped; „PU Time“: Operating time from the general pickup to the dropout of the device, in ms;...
Page 306: Pre-Defined Cfc Charts
A Appendix A.5.6 Pre-defined CFC Charts Some CFC charts are already supplied with the SIPROTEC 4 device. Depending on the variant the following charts may be implemented: Device and System Some of the event-controlled logical allocations are created with blocks of the slow Logic logic (PLC1_BEARB = slow PLC processing).
Page 307 A.5 Default Settings Interlocking With blocks of level Interlocking (SFS_BEARB = interlocking), standard interlocking for three switchgears (circuit breaker, disconnector and earth switch) is pre-defined. Due to the large functional scope of the logic you will find this level on two worksheets. The circuit breaker can only be closed if •...
Page 308 A Appendix Figure A-11 Standard interlocking for circuit breaker (Breaker), disconnector (Disc. Swit.) and earth switch (GndSwit.) 7ST6 Manual E50417-G1176-C251-A3...
Page 309: Protocol-Dependent Functions
A.6 Protocol-dependent Functions Protocol-dependent Functions Protocol → IEC 60870-5-103 PROFIBUS FMS PROFIBUS DP DNP3.0 Additional Service Function ↓ Interface (optional) Operational Mea- sured Values Metered Values Fault Recording No. Only via addi- No. Only via ad- tional service inter- ditional service face interface Remote Protection...
Page 310: Functional Scope
A Appendix Functional Scope Addr. Parameter Setting Options Default Setting Comments Grp Chge OPTION Disabled Enabled Setting Group Change Option Enabled OSC. FAULT REC. Disabled Enabled Oscillographic Fault Records Enabled DISTANCE CURVE Quadrilateral Combined Distance Curve Combined InrushRestraint Disabled Enabled 2nd Harmonic Inrush Restraint Enabled FCT HS O/C...
Page 311: Settings
A.8 Settings Settings Addresses which have an appended "A" can only be changed with DIGSI, under Ad- ditional Settings. The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secondary nominal current of the current transformer. Addr. Parameter Function Setting Options Default Setting Comments...
Page 312 A Appendix Addr. Parameter Function Setting Options Default Setting Comments OP.CYCLES AT Ir P.System Data 1 100 .. 1000000 10000 Switching Cycles at Rated Normal Current Isc-CB P.System Data 1 10 .. 100000 A 25000 A Rated Short-Circuit Breaking Current CB OP.CYCLES Isc P.System Data 1 1 ..
Page 313 A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 1150A SI Time Man.Cl P.System Data 2 0.01 .. 30.00 sec 0.30 sec Seal-in Time after MANUAL clo- sures 1151 SYN.MAN.CL P.System Data 2 with Sync-check w/o Sync-check Manual CLOSE COMMAND w/o Sync-check generation 0.05 ..
Page 314 A Appendix Addr. Parameter Function Setting Options Default Setting Comments 0.20 .. 250.00 Ω 15.00 Ω 1227 R3 Strk Distance prot. Resistance R Zone Z3 Reverse 0.04 .. 50.00 Ω 3.00 Ω 0.20 .. 250.00 Ω 15.00 Ω 1228 R3 Strk Reverse Distance prot.
Page 315 A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 0.20 .. 250.00 Ω 12.00 Ω 1328 Z1B Reverse Distance prot. Impedance Z Zone Z1B Reverse 0.04 .. 50.00 Ω 2.40 Ω 1331 Op. Mode Z1L Distance prot. Forward Forward Operating Mode Distance Zone Forward ext.
Page 316 A Appendix Addr. Parameter Function Setting Options Default Setting Comments 0.20 .. 250.00 Ω 20.00 Ω 1359 X2 Strk Reverse Distance prot. Reactance X Zone Z2 Stroke Reverse 0.04 .. 50.00 Ω 4.00 Ω 0.20 .. 250.00 Ω 20.00 Ω 1360 Z2 Strk Reverse Distance prot.
Page 317 A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments -70 .. 40 ° -20 ° 1387 GAMMA ZOR Distance prot. Angle Limit. Gamma Overreach Zone 0.20 .. 250.00 Ω 10.00 Ω 1388 ROR Reverse Distance prot. Resistance R Overreach Zone Reverse 0.04 ..
Page 318 A Appendix Addr. Parameter Function Setting Options Default Setting Comments 0.10 .. 25.00 A; ∞ 2705 I Emerg. O/C Emerg. O/C 2.00 A Emergency O/C Pickup Current 0.50 .. 125.00 A; ∞ 10.00 A 0.00 .. 30.00 sec; ∞ 2706 T Emerg.
Page 319 A.8 Settings Addr. Parameter Function Setting Options Default Setting Comments 3501 FCT Synchronism Sync. Check Synchronism and Voltage Check function 3502 Dead Volt. Thr. Sync. Check 1 .. 60 V Voltage Threshold Dead Line / Reference 3503 Live Volt. Thr. Sync.
Page 320 A Appendix Addr. Parameter Function Setting Options Default Setting Comments 3901 FCT BreakerFail Breaker Failure Breaker Failure Protection is 3902 I> BF Breaker Failure 0.05 .. 20.00 A 0.10 A Pick-up threshold I> 0.25 .. 100.00 A 0.50 A 0.10 .. 10.00 sec; ∞ 3904 tBF1 Breaker Failure...
Page 321: Information List
A.9 Information List Information List Indications for IEC 60 870-5-103 are always reported ON / OFF if they are subject to general interrogation for IEC 60 870-5-103. If not, they are reported only as ON. New user-defined indications or such newly allocated to IEC 60 870-5-103 are set to ON / OFF and subjected to general interrogation if the information type is not a spon- taneous event („.._Ev“).
Page 322 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio Fault Recording Start (FltRecSta) Osc. Fault Rec. IntSP CB-Test:TRIP command main trip Testing element (CB-T T M) CB-Test:TRIP command backup Testing trip element (CB-T T B) CB-Test: trip/close main trip Testing element (CB-T T/C M)
Page 323 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio >Reset LED (>Reset LED) Device LED BI >Setting Group Select Bit 0 (>Set Change Group LED BI Group Bit0) >Setting Group Select Bit 1 (>Set Change Group LED BI Group Bit1)
Page 324 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio VT Fuse Failure (alarm >t) (VT Monitoring FuseFail>t) VT Fuse Failure (alarm instanta- Monitoring neous) (VT FuseFail) Failure: Battery empty (Fail Bat- Device tery) Error: A/D converter (Error A/D- Device conv.)
Page 325 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio Final Trip (Final Trip) P.System Data 2 Time from Pickup to drop out (PU P.System Data 2 Time) Time from Pickup to TRIP (TRIP P.System Data 2 Time) Manual close signal detected...
Page 326 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 1455 Breaker failure : fault detection Breaker Failure on off (B/F fault) 1471 Breaker failure TRIP (BrkFailure Breaker Failure TRIP) 1484 B/F: pick up superordinat.prot.re- Breaker Failure lais (B/F s.ordProt) 1491...
Page 327 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 2742 >AR: Block 1st AR-cycle (>BLK Auto Reclose on off LED BI 1.AR-cycle) 2746 >AR: External Trip for AR start Auto Reclose on off LED BI (>Trip for AR) 2781...
Page 328 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 2866 Th-AR: Therm.AR reclaim time is Auto Reclose running (Th-AR T-Recl.) 2867 Th-AR: Thermal AR cycle suc- Auto Reclose cessful (Th-AR success) 2868 Th-AR: Thermal AR definite trip Auto Reclose (Th-AR def.Trp) 2901...
Page 329 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 2971 Sync. Reference frequency < (fn- Sync. Check on off 3Hz) (Sync. fref<<) 2972 Sync. Line frequency > (fn + 3Hz) Sync. Check on off (Sync.
Page 330 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 3909 Dist.: Delay Time T2K is active Distance prot. (Dis. T2K active) 3915 Dist.: Zone Z1 is active (Dis. Z1 Distance prot. act.) 3916 Dist.: Zone Z1 stroke is active Distance prot.
Page 331 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 6605 >First catenary is active (>Cat.1 Therm. Overload LED BI active) 6616 First catenary is active (Cat. 1 Therm. Overload IntSP active) 6617 Second catenary is active (Cat.
Page 332 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 13803 du/dt function is active in Zone Z3 Distance prot. (Z3du/dt ACTIVE) 13804 Dist.: Delay Time T3K is active Distance prot. (Dis. T3K active) 13805 Time Out T3K (Time Out T3K) Distance prot.
Page 333 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 13836 Undervolt. U<< picked up Over/Under Volt on off (UNDER U<< PU) 13837 Undervolt. U< TRIP command Over/Under Volt (UNDER U< TRIP) 13838 Undervolt.
Page 334 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 13872 AR thermal trip:ON/OFF via Tele- Auto Reclose IntSP gram (AR TH ON/OFFtel) 13873 AR thermal trip:ON/OFF via Auto Reclose IntSP Binary Input (AR TH ON/OFF BI) 13874 >AR: BLOCK 2nd-nth cycle (>AR Auto Reclose...
Page 335 A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 13904 Dist. Prot. TRIP Zone Z3 (over- Distance prot. load) (Dis TRIP Z3L) 13905 Dist. Prot. TRIP after PU by Man. Distance prot. Close (Dis TRIP PU MC) 13906 TRIP Overreach Zone after Man.
Page 336 A Appendix Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 13974 Differential Protection picked up Defrosting on off (Diff PU) 13975 Differential Protection TRIP (Diff Defrosting TRIP) 13976 Defrosting Protection on/off about Defrosting IntSP BI (DEF ON/OFF BI) 13978 Block Defrosting Protection (De-...
Page 337: Group Alarms
A.10 Group Alarms A.10 Group Alarms Description Function No. Description Error Sum Alarm Error 5V 13953 Failure Umeas Error1A/5Awrong Error A/D-conv. Alarm Sum Event VT FuseFail>t VT FuseFail >FAIL:Feeder VT 13951 >VT MCB UF Fail Battery Alarm adjustm. Error Board 0 Error Board 1 Error Board 2 Error Board 3...
Page 338: Measured Values
A Appendix A.11 Measured Values Description Function IEC 60870-5-103 Configurable in Matrix Control DIGSI (CntrlDIGSI) Cntrl Authority U - Difference (line - reference) (Udif=) Measurement U - Line (Uline=) Measurement U - Reference (Uref=) Measurement P (active power) (P =) Measurement Q (reactive power) (Q =) Measurement...
Page 339 A.11 Measured Values Description Function IEC 60870-5-103 Configurable in Matrix 13968 Differential current in [%] is (Id =) Measurement 13969 Restraint current in [%] is (Ir =) Measurement 16009 Lower Threshold of CB Residual Endurance SetPoint(Stat) (Resid.Endu. <) ■ 7ST6 Manual E50417-G1176-C251-A3...
Page 340 A Appendix 7ST6 Manual E50417-G1176-C251-A3...
Page 341: Literature
Literature SIPROTEC 4 System Manual; E50417-H1100-C151-A SIPROTEC DIGSI, Start Up; E50417-G1100-C152-A DIGSI CFC, Manual; E50417-H1100-C098-A SIPROTEC SIGRA 4, Manual; E50417-H1100-C070-A 7ST6 Manual E50417-G1176-C251-A3...
Page 342 Literature 7ST6 Manual E50417-G1176-C251-A3...
Page 343: Glossary
Glossary Battery The buffer battery ensures that specified data areas, flags, timers and counters are re- tained retentively. Bay controllers Bay controllers are devices with control and monitoring functions without protective functions. Bit pattern indica- Bit pattern indication is a processing function by means of which items of digital tion process information applying across several inputs can be detected together in paral- lel and processed further.
Page 344 Glossary Component view In addition to a topological view, SIMATIC Manager offers you a component view. The component view does not offer any overview of the hierarchy of a project. It does, how- ever, provide an overview of all the SIPROTEC 4 devices within a project. COMTRADE Common Format for Transient Data Exchange, format for fault records.
Page 345 Glossary This term means that a conductive part is connected via an earthing system to the → Earth (verb) earth. Earthing Earthing is the total of all means and measures used for earthing. Electromagnetic Electromagnetic compatibility (EMC) is the ability of an electrical apparatus to function compatibility fault-free in a specified environment without influencing the environment unduly.
Page 346 Glossary image. The current process state can also be sampled after a data loss by means of a GI. GOOSE message GOOSE messages (Generic Object Oriented Substation Event) are data pakets which are transferred event-controlled via the Ethernet communication system. They serve for direct information exchange among the relays.
Page 347 Glossary → IRC combination Inter relay commu- nication IRC combination Inter Relay Communication, IRC, is used for directly exchanging process information between SIPROTEC 4 devices. You require an object of type IRC combination to con- figure an inter relay communication. Each user of the combination and all the neces- sary communication parameters are defined in this object.
Page 348 Glossary Modems Modem profiles for a modem connection are stored in this object type. Measured value MVMV Metered value which is formed from the measured value Measured value with time Measured value, user-defined Navigation pane The left pane of the project window displays the names and symbols of all containers of a project in the form of a folder tree.
Page 349 Glossary Project Content-wise, a project is the image of a real power supply system. Graphically, a project is represented as a number of objects which are integrated in a hierarchical structure. Physically, a project consists of a number of directories and files containing project data.
Page 350 Glossary SIPROTEC 4 device This object type represents a real SIPROTEC 4 device with all the setting values and process data it contains. SIPROTEC 4 This object type represents a variant of an object of type SIPROTEC 4 device. The variant device data of this variant may well differ from the device data of the original object.
Page 351: Index
Index Index Communication 20 Communication interfaces 258 Acknowledgement of commands 201 Configuration of functional scope 27 Analog Inputs 256 Contact mode for binary outputs 212 Auxiliary voltage 257 Control Logic 199 Automatic reclosing commands 192 Control voltage for binary inputs 212 Automatic Reclosure Function 124 Counters and memories 192 Automatic reclosure function 278...
Page 352 Index Operational measured values 284 Operator Interface 258 General 26 Oscillographic recordings for test 251 General Diagrams 293 Output relays 186 General interrogation 189 Output relays of binary outputs 258 Overcurrent stage I> 80 Overcurrent stage IP (inverse-time overcurrent pro- tection with ANSI characteristics) 81 Overcurrent stage IP (inverse-time overcurrent pro- High-set current stage I>>...
Page 353 Index Synchronism conditions for automatic reclosure Synchronism conditions for manual csure and control command 147 System Interface 259 Terminal Assignment 293 Termination 237 Termination of serial interfaces 212 Test mode 241 Test: System interface 242 Time constant τ Time Overcurrent Protection 268 Time overcurrent protection 76 Time overcurrent stage I>...
Page 354 Index 7ST6 Manual E50417-G1176-C251-A3...
Page 355 Index 7ST6 Manual E50417-G1176-C251-A3...
Page 356 Index 7ST6 Manual E50417-G1176-C251-A3...

Siemens SIPROTEC 7ST6 Manual

1 Introduction

2 Functions

3 Mounting and Commissioning

4 Technical Data

Appendix

Literature

Glossary

Index

Quick Links

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Summary of Contents for Siemens SIPROTEC 7ST6