Related Manuals for ABB Uniswitch
Summary of Contents for ABB Uniswitch
- Page 1 Uniswitch Medium Voltage Switchgear 12 kV, 17.5 kV, 24 kV 630 A and 1250 A Operation and Maintenance Manual...
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Page 2: Table Of Contents
TABLE OF CONTENTS Summary ..........................1 General ........................... 1 Standards and specifications ..................2 Service conditions ......................3 1.3.1 Normal service conditions .................. 3 1.3.2 Special service conditions .................. 4 Technical data.......................... 5 Electrical data ......................... 5 Internal arc classification ....................6 Design and construction ...................... - Page 3 4.4.3.1 Charging the stored energy spring system ........34 4.4.3.2 Opening and closing the VD4 type circuit-breaker ......34 4.4.4 Circuit-breaker – type HD4 ................35 4.4.4.1 Manual operation for spring charging..........35 4.4.4.2 Electrical operation for spring charging..........35 4.4.4.3 Circuit-breaker closing................
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Page 4: Summary
By combining the standard components, a system which offers a wide range of different device arrangements can be made. Applications The Uniswitch switchgear and controlgear system is designed for use in general and industrial applications in 3.6 – 24 kV electrical distribution networks. -
Page 5: Standards And Specifications
All other corresponding IEC publications, national or local safety-at-work regulations and safety regulations for production materials must be adhered to during the installation and operation of these systems. Above and beyond these, the order-related data from ABB must be taken into account. Uniswitc h Operation and... -
Page 6: Service Conditions
Average value of relative humidity (24 h) ≤ 90 % Average value of relative humidity (1 month) Pollution The ambient air must not be significantly polluted by dust, smoke, corrosive and/or flammable gases, vapors or salt. Uniswitch Operation and UNI S14GB 05-02 Maintenanc e Manual... -
Page 7: Special Service Conditions
1.3.2 Special service conditions Special service At site altitudes above 1000 m, the effects of the reduction in dielectric conditions strength of the air on the insulation level must be taken into account (please refer to IEC standard 60694). Increased ambient temperatures must be compensated for in the design of the busbars and branch conductors as well as for the components, otherwise the current carrying capacity will be limited. -
Page 8: Technical Data
2 Technical data 2.1 Electrical data Table 2.1 Electrical data Rated voltage U 17.5 Rated lightning impulse withstand voltage U Common value Across the isolating distance Rated power-frequency withstand voltage U Common value Across the isolating distance Rated frequency 50/60 50/60 50/60 Rated current I... -
Page 9: Internal Arc Classification
The switchgear units have been tested according to IEC 60298 Standards (appendix AA, class A, criteria 1 to 6). Uniswitch switchgear has to be installed in closed rooms suitable for electrical equipment. This means the accessibility must be restricted to authorised personnel only. -
Page 10: Design And Construction
3.1 Construction of the switchgear and main components General In the design of the Uniswitch cubicle, special attention has been paid to increased reliability of use and improved personnel safety in the possible event of an arc-fault. The following improvements have been made: •... - Page 11 When opening, the user should take measures to ensure safety (ie. Busbar must be dead). 2) Gas filled compartment The three position switch-disconnector is located between the main busbar and cable compartments. Its epoxy resin shell forms an SF -gas filled space in which the electrical parts of the switches are situated.
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Page 12: Compartments Of Withdrawable Type Switchgear
The enclosure is completed by the top-mounted pressure relief flap which is common for the two high- voltage compartments. This flap will open in the case of overpressure due to an internal arc fault. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... - Page 13 Compartments The cubicle is divided into the following compartments (for all compartments, see Figure 3.2): Figure 3.3 View into the busbar compartment. 1) Busbar compartment (1) (see Figure 3.2) The busbars (40) have a profile cross-section made of copper and are laid in sections from cubicle to cubicle.
- Page 14 withdrawable part moves to the disconnected position. In the test/disconnected position of the withdrawable part, partitioning by separation is established in the main current circuit. Connection of the control wiring, required for test purposes, need not be interrupted when in the test/disconnected position. •...
- Page 15 The withdrawable assembly establishes the mechanical connection between the cubicle and the circuit-breaker. The fixed part is connected to the cubicle by forking, which is form-coded on both sides. Figure 3.6 Withdrawable assembly for circuit-breaker, with auxiliary switches. The moving part with the circuit-breaker is moved manually by means of a spindle (60.1), between the service or test/disconnected positions with the front doors closed.
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Page 16: Service Continuity
According to IEC 62271-200 the Loss of Service Continuity (LSC) of Uniswitch switchgear is LSC2A-PI. The PI denotes that partition and shutters are insulation. Table 3.1 Accessibility to compartments (according to IEC 62271-200). -
Page 17: Enclosure And Partitioning
3.3 Enclosure and partitioning Material The enclosure and internal partitions of the cubicles are made of 2 mm thick high-quality aluminum-zinc coated steel sheet. Doors and end plates are thoroughly cleaned and treated against corrosion before receiving a high-quality coating of paint. The finishing coat is in the standard RAL 7035 colour (special colours by agreement). -
Page 18: Interlockings
3.5.2 Interlockings of the fixed type switchgear 3.5.2.1 Interlocking unit General Permitted control operations of the Uniswitch switchgear and the three- position SFG switch-disconnector are defined by the position of the selector of the interlocking mechanism. Positions... - Page 19 Interlocking system The use of the interlocking system and permitted operations are shown in the figure below: Figure 3.8 Interlocking system and permitted operations. Uniswitc h Operation and UNI S14GB 05-02 Maintenanc e Manual...
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Page 20: Normal Interlocking
• Double key lock on the SFG switch-disconnector. The interlock can be verified with a micro switch when motor operated. Additional locks such as Castell and Ronis are also possible. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 21: Interlockings Of The Withdrawable Type Switchgear
(electromechanical interlock). Connecting and disconnecting the control wiring plug (44.4) (Figure 3.5) is only possible in the test/disconnected position of the withdrawable part due to the door interlock. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... - Page 22 Figure 3.10 Operating and interlocking mechanism of earthing switch type EM. The earthing switch (46.1) (Figure 3.2) can only be switched on if the withdrawable part is in the test/disconnected position or outside of the cubicle (mechanical interlock) (61.3 and 61.4). If the earthing switch is on, the withdrawable part cannot be moved from the test/disconnected position to the service position (mechanical interlock).
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Page 23: Door Interlocking
The apparatus compartment door cannot be opened if the circuit- breaker is in service or in an undefined position. • The circuit-breaker & cable compartment door cannot be opened if the earthing switch is open. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 24: Locking Devices
(Figure 3.12). • Access to the circuit-breaker racking slot can be restricted with a padlock (Figure 3.13). • Access to the circuit-breaker & cable compartment can be restricted with a padlock. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 25: Operation Of The Switchgear
4 Operation of the switchgear 4.1 General cautions and warnings Do not walk on the top surfaces of the switchgear cubicles (rupture points for pressure relief)! The switching operations are to be carried out with the doors closed. The relative work and operating procedure must be carried out carefully by a trained specialist familiar with the installation, taking into account all the relative safety regulations according to the IEC and other relevant... -
Page 26: Commissioning
Set the protective devices in the switchgear to the required values and check their function with test equipment. • Instruct local operators regarding the basic details of regular handling of the switchgear. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 27: Start-Up
• Check readiness for operation and the switching status of electrical systems upstream and downstream of the switchgear. Reference For any other matters regarding operation of the withdrawable circuit- breaker part and testing facilities for the withdrawable part, see section 5.6. -
Page 28: Operating The Fixed Type Switchgears
4) Put the operating handle into the hole so that the guide key goes into the notch on the shaft. 5) Turn the operating handle anti-clockwise about 80 degrees until the switch-disconnector opens. Figure 4.2 Opening the switch- connector. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 29: Operating The Sfg Switch-Disconnector To The Earthed Position
4) Put the operating handle into the hole so that the guide key goes into the notch on the shaft. 5) Turn the operating handle clockwise about 80 degrees until the switch-disconnector opens and moves from the earthed position. Figure 4.4 Opening from earthed position. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 30: Operations In Fixed Mounted Circuit-Breaker Cubicles
HD4 circuit-breaker Operating sequences: 1) Open the earthing switches (see 4.3.1.4). Connecting the cubicle 2) Close the switch-disconnector (see 4.3.1.1). in the network 3) Close the circuit-breaker by push button (43.2). Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 31: Operating The Withdrawable Type Switchgears
4.4 Operating the withdrawable type switchgears 4.4.1 Manual operation of the withdrawable type Carry out switching operations with the front doors closed. 4.4.1.1 Manual insertion from the test/disconnected position to the service position Figure 4.6 Withdrawable assembly for circuit-breaker, with auxiliary switches. (3/10) 1) Connect control wiring plug (44.4) (Figure 4.9) to socket (50.1) (Figure 4.8). - Page 32 Figure 4.8 Figure 4.9 View inside the circuit-breaker compartment Connect and release of control wiring plug interlock It must be considered that the spring loaded pin head (60.2) (Figure 4.6) will lie completely on the rear side of the cubicle door when the hand crank is moved from square spigot of spindle mechanism.
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Page 33: Manual Withdrawal From The Service Position To The Test/Disconnected Position
4.4.1.2 Manual withdrawal from the service position to the test/disconnected position • Instructions Ensure that the circuit-breaker is in the OFF position. • Reverse the procedure described above for insertion into the service position. Insertion and withdrawal of circuit-breakers must be gradual, in order to avoid any shocks which could deform the mechanical interlock. -
Page 34: Withdrawal From The Test/Disconnected Position Onto The Service Truck
) top at the correct height for approach to the switchgear panel, 81.3 and engaging the catch ( Figure 4.11 Service truck engaged with the switchgear panel. Withdrawable part ( 60.9 released for withdrawal with the handles sliding ( ) inwards. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 35: Insertion From The Service Truck Into The Test/Disconnected Position
4.4.1.4 Insertion from the service truck into the test/disconnected position • Instructions Carry out the procedure described in 4.4.1.3 for withdrawal in reverse order. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 36: Opening And Closing The Doors
4.4.2 Opening and closing the doors Preparatory The cable compartment door can be removed when the switch-disconnector is in the earthed position and the interlocking selector is in the “Door open” position and the earthing switch is in “Closed” position.. Figure 4.13 Figure 4.14 Lift the door by the handle... -
Page 37: Circuit-Breaker - Type Vd4
4.4.3 Circuit-breaker - type VD4 4.4.3.1 Charging the stored energy spring system Instructions On the circuit-breaker with charging motors, charging is carried out automatically. If the charging motor should fail, the charging procedure can be carried out manually. On breakers with manual charging systems, open the door with the withdrawable part in the disconnected position, insert charging lever (80.4) into the recess and pump for approximately 25 strokes until the charged condition is indicated (43.4). -
Page 38: Circuit-Breaker - Type Hd4
4.4.4 Circuit-breaker – type HD4 4.4.4.1 Manual operation for spring charging Instructions To manually charge the closing springs, fully insert charging lever (80.5) into seat (44.5) (Figure 4.20) and turn it until the yellow indicator (43.4) (Figure 4.20) appears. Figure 4.19 Manual charging of HD4 circuit-breaker springs. -
Page 39: Circuit-Breaker Opening
(60.12) anticlockwise to the stop, if the withdrawable Figure 4.21 part is in the service position. • Observe the switch position indicator. Detailed information about installation and maintenance can be found in instruction manual 647016. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 40: Earthing Switch - Type Em
4.4.5 Earthing switch - type EM 4.4.5.1 General Operating principle The earthing switch - type EM - has a snap closing mechanism, which is independent of the rotation of the drive shaft. An earthing switch allocated to a circuit-breaker is only enabled for switching when withdrawable part is in the test/disconnected position or removed from the switchgear cubicle. -
Page 41: Manual Opening And Closing
4.4.5.2 Manual opening and closing • Press slide (61.7) downwards onto the operating lever recess socket. (When the switch is closed, it is already in this position!) If the operation is prevented, do not force the interlock and check that the operation sequence is correct. -
Page 42: Voltage Presence Indicating Systems
4.5 Voltage presence indicating systems General Uniswitch cubicles can be, if required, fitted with voltage presence indicating system (VPIS) in accordance with IEC 61958. VPIS is used to indicate the presence of operating voltage. The indication of VPIS alone is not sufficient to prove that the system is dead: if operating procedures make it mandatory, relevant voltage detectors according to IEC 6143-5 shall be used. -
Page 43: Service And Maintenance
IEC safety regulations and those of other technical authorities, and with other overriding instructions. It is recommended that ABB service personnel be called in to perform the servicing and repair work detailed below. •... - Page 44 For the Uniswitch switchgear under normal service conditions maintenance intervals and measures according to Table 5.1 recommended. In more demanding conditions (for example areas with high pollution levels) three year intervals are recommended for all maintenance measures.
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Page 45: Maintenance Intervals
As required As required Under more demanding service conditions, we recommend shortening this interval appropriately – also sections 5.2 and 5.3. According to results of inspection. See the instruction manual for the circuit-breakers. Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 46: Inspection
5.3 Inspection General Where necessary, the working area must be isolated and secured before inspection against reconnection in accordance with the “Safety Regulations” specified by IEC and appropriate national standards. Correct condition of the switchgear should be monitored by regular inspections. -
Page 47: Servicing
Should partial discharges occur as a result of condensation, application of a thin silicone film on the surface concerned is often effective as a temporary remedy. It is advisable to ask the ABB after-sales service department for advice regarding permanent solutions to this unusual type of problem. -
Page 48: Repair
5.5 Repair 5.5.1 Switchgear in general • Instructions Carry out repair work immediately after a defect has been discovered. • Completely remove all rust from damaged paintwork areas on steel sheet and other steel parts by mechanical means, e.g. with a wire brush. -
Page 49: Replacement Of Melted Fuse Links
5.5.2 Replacement of melted fuse links 5.5.2.1 Investigate and clear a fault General The fuse links cannot be regenerated. According to IEC Publication 60282-1, all three fuse links should be replaced, even if only one or two of the fuse links in the three-phase system have operated. Exceptions are allowed when it can be verified that the fuse link(s) have not experienced any overcurrent. -
Page 50: Removal Of The Fuse Links
Push the fuse link first into the upper fuse holder (47.1) (Figure 5.4) and then into the lower holder (47.2) (Figure 5.3). Drag the fuse link downward about 5 mm. Figure 5.4 Uniswitch Operation and Maintenance Manual UNI S14GB 05-02... -
Page 51: Testing Withdrawable Parts
5.6 Testing withdrawable parts General When functional tests are carried out on withdrawable parts, compliance with the conditions listed below should also be checked. 5.6.1 Testing interlock conditions Figure 5.5 Withdrawable part standing on service truck and secured by the catches Checkpoints 1) The withdrawable part must only be movable from the test/disconnected position to the service position when the circuit-... - Page 52 2) The withdrawable part must only be movable from the test/disconnected position to the service position when the control- wiring plug is inserted. Check the following conditions individually: • With the control wiring plug disconnected, insertion of the withdrawable part towards the service position must be locked after only half a turn of the crank in the clockwise direction.
- Page 53 6) Withdrawable parts with order-related locking magnet Y0 may not be moved in case of control power failure, or when there is no control power. Do not forcibly move locked withdrawable parts! The locking magnet Y0 is only present on manually operated withdrawable parts. •...
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Page 54: Spare Parts, Auxiliary Materials And Lubricants
5.7 Spare parts, auxiliary materials and lubricants 5.7.1 Spare parts Available on request A spare parts list is available on request for procurement of spare parts. It basically includes moving parts and parts subject to wear. When parts are required, the serial number of the relative switchgear or switching device should always be quoted. -
Page 55: Troubleshooting
Troubleshooting Problem Action All cubicle types • Switch-disconnector cannot be closed. Check that the switch is in the open position. • Check that the interlocking selector is in the ‘Operation’ position. • Turn the operating handle clockwise. • Switch-disconnector cannot be opened. Check that the switch is in the closed position. - Page 56 The switch-fuse has not operated even Check that the fuse is correctly fitted so that the trip pin though a fuse has blown. indicator is pointing upwards. Circuit-breaker cubicle • The cable compartment door will not Check that the switch is in the earthed position. open.
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Page 57: Product Quality And Environmental Protection
ISO 9001 and by the EMS according to ISO 14 001. At the end of a product’s The ABB company is committed to complying with the relevant legal and life... other requirements for environment protection according to the ISO 14 001 standard. -
Page 58: Packing Materials
SFG switch-disconnector includes e.g. copper and SF – gas, which are material valuable materials for recycling. The recycling/disposal can be subcontracted to ABB or to a specialist company (see 7 Product quality and environmental protection). References IEC technical report 1634 (1995): “High-voltage switchgear and controlgear –... - Page 59 Uniswitch Operation and Maintenance Manual UNI S14GB 05-02...
- Page 60 Information given in this publication is ABB Oy generally applicable to equipment MV Apparatus & Switchgear described. Changes may be made in future without notice. P.O.Box 613, FIN-65101 Vaasa, Finland Tel: +358 10 22 11 Fax: +358 10 22 44661...