Omicron CMC 356 User Manual
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Omicron CMC 356 User Manual

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Summary of Contents for Omicron CMC 356

  • Page 1 CMC 356 User Manual...
  • Page 2 The user is responsible for every application that makes use of an OMICRON product. OMICRON electronics translates this manual from the source language English into a number of other languages. Any translation of this manual is done for local requirements, and in the event of a dispute between...

  • Page 3: Table Of Contents

    Preface........................7 Safety Instructions ....................8 Designated Use .................... 11 Introduction ....................12 Options Available for the CMC 356 Test Set..............12 Operating the CMC 356 ................13 System Components ..................... 13 Safe Use of the Connecting Cables ................14 3.2.1...
  • Page 4 CMC 356 Reference Manual Connections on the Back Panel ..................32 5.2.1 Ethernet Ports ETH1 and ETH2 ................ 32 5.2.2 ! Button ......................33 5.2.3 Associate Button....................33 5.2.4 Status LED A, B....................34 5.2.5 Ethernet / Network Settings ................34 5.2.6...
  • Page 5 6.11 Option LLO-2 (Low Level Outputs)................. 90 Increasing the Output Power, Operating Modes ........91 Safety Instructions for High Current Output..............91 Single-Phase Operation of the CMC 356 ..............92 7.2.1 1 x 32 A High Burden Mode (L-L-L-L)..............92 7.2.2...
  • Page 6 CMC 356 Reference Manual CMC 356-Related Products and Accessories ......... 105 CMA Current Amplifiers & CMS Voltage Amplifiers ............ 105 CMControl-6 ......................... 106 Time Synchronization Accessories................107 9.3.1 CMGPS......................107 9.3.2 CMIRIG-B ......................109 100TX to 100FX-SC Converter ..................111 Current Clamp C-PROBE1...................

  • Page 7: Preface

    REFACE The purpose of this reference manual is to familiarize users with the CMC 356 test set and to show how to properly use it in various application areas. The manual contains important tips on how to use the CMC 356 safely, properly, and efficiently.

  • Page 8: Safety Instructions

    Before operating the CMC 356 test set, carefully read the following safety instructions. Only operate (or even turn on) the CMC 356 after you have read this reference manual and fully understood the instructions herein. The CMC 356 may only be operated by trained personnel. Any maloperation can result in damage to property or persons.
  • Page 9 Follow the instructions in sections 3.2 and 3.4 that describe the safe use of the connecting cables and how to set the CMC 356 into operation. • The CMC 356 must only be used from a power outlet that has a protective earth. •...
  • Page 10 For applications drawing DC current: The load may not exceed 3 mH because of dangerous feedback current. • When setting up the CMC 356, make sure that the air slots on the back, top, and bottom of the test set remain unobstructed. •...

  • Page 11: Designated Use

    [0 Hz (DC) ... 10 kHz] for ten analog inputs are available. The CMC 356 is part of the OMICRON Test Universe which, in addition to the physical test set, consists of a test software for a computer with...

  • Page 12: Introduction

    CMC 356 Reference Manual NTRODUCTION The CMC 356 is a part of the OMICRON Test Universe which, in addition to the physical test set, consists of a test software for a computer with Microsoft Windows operating system, and, when needed, external voltage and/or current amplifiers, GPS or IRIG-B synchronization units or other accessories (refer to section 9, "CMC 356-Related Products and...

  • Page 13: Operating The Cmc 356

    System Components Before operating the CMC 356 for the first time, use the packing list to verify that all components of the test system are available. To set the CMC 356 into operation you need the following components: •...

  • Page 14: Safe Use Of The Connecting Cables

    ↔ Safety socket of, for example, the CMC 356 test set. Plug only the regular test leads of 2.0 m/6 ft. length into the CMC 356 output safety sockets. Regular test lead Test lead adapter ↔...

  • Page 15: Regular Test Leads For Safety Sockets

    Operating the CMC 356 Regular Test Leads for Safety Sockets Use the regular test leads of 2.0 m/6 ft. length to connect the CMC 356 output to other safety sockets of, for example, amplifiers, test objects or to banana adapters in control cabinets.

  • Page 16: M4 (0.15") Cable Lug Adapters

    CMC 356 Reference Manual 3.3.2 M4 (0.15") Cable Lug Adapters The optional CMC Wiring Accessory Package includes M4 (0.15") cable lug adapters to connect regular test leads to screw-clamp terminals of SEL/ABB/GE relays (and others). Regular test lead ↔ M4 (0.15") cable lug adapter The cable lugs have blank ends.

  • Page 17: Starting The Test System

    Detailed instructions for installing the software for the OMICRON Test Universe can be found in the software manual "The Concept". This description refers both to the computer and to the CMC 356. It does not take into consideration any external devices. If the system is driven by external amplifiers, follow the instructions in section 7.5, "Operation with...
  • Page 18 3. Turn on both devices. 4. Start the OMICRON Test Universe software. A comprehensive hardware test is carried out on the CMC 356. In the process, switching sounds from relays in the CMC test set can be heard. If any irregularities are determined during the course of this self-test, the software displays a corresponding error message on the PC monitor (refer to section 8, "Troubleshooting"...

  • Page 19: Setup And Function

    Setup and Function ETUP AND UNCTION The computer-controlled OMICRON test system employs the concept of a functional division between the software running on the computer and the CMC 356 hardware connected to the test object. OMICRON Test Universe test software running on the computer •...

  • Page 20: Block Diagram

    1* Note regarding the hardware option ELT-1: The hardware option ELT-1 enables the measurement of analog signals using the CMC 356. In the standard configuration (CMC 356 without option ELT-1), the inputs BINARY/ANALOG INPUT 1 - 10 can only be used as...

  • Page 21: Voltage Output (Voltage Amplifier)

    (voltage outputs) The four voltage outputs have a common neutral N and are galvanically separated from all other outputs of the CMC 356. The two black sockets labeled "N" are galvanically connected with one another. The voltage amplifier and the current amplifiers are linear amplifiers with DC coupling.

  • Page 22: Current Output (Current Amplifier)

    The output sockets are internally protected against currents > 45A peak (32A ; the CMC 356 switches off with the error message "current on neutral too high"). In non-operative state, relay contacts (as illustrated in figure 5-3) protect the current amplifier from external power by shortening the outputs to N.

  • Page 23: Binary / Analog Input (Binary Inputs 1 - 10)

    CPU. The binary inputs are configured from the Hardware Configuration module of the OMICRON Test Universe software. When doing so, it can be specified whether the contacts are potential-sensitive or not. When the contacts are potential-sensitive, the expected nominal voltage and pick-up threshold can be set for each binary input.

  • Page 24: Aux Dc (Dc Power For Test Objects)

    "This unit outputs an AuxDC voltage of ___V immediately after powering-up". If the voltage on the "AUX DC" output exceeds 42 V, the associated signal light lights up. More information about the configuration of the AUX DC supply can be found in the OMICRON Test Universe AuxDC Help.

  • Page 25: Cpu

    Setup and Function 4.1.6 The CMC 356 CPU (Central Processing Unit) carries out the following tasks: • Communication with the computer or a network via the Ethernet ports “ETH1” and “ETH2”. • Digital signal generation for all outputs of the test set (including control signals for external amplifiers).

  • Page 26: Accuracy And Signal Quality

    CMC 356 Reference Manual 4.2.1 Accuracy and Signal Quality The CMC 356 is a very precise test set with excellent long-term and temperature drift behavior. To achieve this accuracy, the philosophy was not only to solve signal generation digitally, but also to implement the distribution of signals to the various modules using digital methods.

  • Page 27: Connections And Interfaces

    ONNECTIONS AND NTERFACES Front Panel Connections Figure 5-1: AUX DC Front view of the CMC 356 Output voltage in 3 ranges from 0 - 264 V; used to supply power to test objects. VOLTAGE OUTPUT BINARY OUTPUT ANALOG DC INPUT...
  • Page 28 Circuit diagram of a binary input with potential-free operation (dry) programmable threshold voltage (wet operation) Note: For simplified circuit diagrams of the inputs BINARY/ANALOG INPUTS and ANALOG DC INPUT of the CMC 356 with hardware option ELT-1 installed, please refer to Figure 6-20 on page 72.
  • Page 29 Connections and Interfaces Figure 5-3: VOLTAGE OUTPUT Simplified diagrams of 4 x 300 V current and voltage outputs CURRENT OUTPUT A CURRENT OUTPUT B 3 x 32 A 3 x 32 A In non-operative state, relay contacts (as illustrated in figure 5-3) protect the current amplifier from external power by shortening the outputs to N.

  • Page 30: Generator Combination Socket For Voltage Output And Current Output

    CURRENT OUTPUT The combination socket CURRENT OUTPUT / VOLTAGE OUTPUT simplifies the connection of test objects to the CMC 356. The three voltage outputs (VOLTAGE OUTPUT 1-3) as well as the CURRENT OUTPUT A are wired to the combination socket (refer to table 5-1 on page 31).
  • Page 31 Description of the generator combination socket information Description SPEAKON LINE 8-pole Article Number NL8FC Manufacturer Neutrik (www.neutrik.com) You can order the plug for generator combination socket directly from OMICRON. For the part number refer to section 9.8, "Ordering Information" on page 127.

  • Page 32: Connections On The Back Panel

    CMC 356 Reference Manual Connections on the Back Panel Figure 5-5: Rear view of CMC 356 Power supply Fans Interface Status LEDs A & B Fuse T12.5 AH power supply "ext. Interf." "Associate" button Fan voltage outputs 4 mm/0.16 " socket...

  • Page 33: Button

    The test set will issue voltages and currents only when it is associated to the client requesting this. The association process can be initiated by the Test Set Association and Configuration tool or by the OMICRON Device Browser. For more details about this process, refer to the Help of the according tool.

  • Page 34: Status Led A, B

    IP Configuration For the CMC test set to communicate with the controlling computer and the OMICRON Test Universe software, TCP/IP is used. The IP parameters are set by either the Test Set Association and Configuration tool or the OMICRON Device Browser.
  • Page 35 Additionally, there is a special DHCP server integrated in the CMC test set to serve IP addresses only for that computer the OMICRON Test Universe software is running on. Note that this will only take place when there is no DHCP server in the network.

  • Page 36: Selv Interfaces

    117 and 9.6.6, "CMLIB B" on page 118. Synchronization Via the "ext. Interf.", the CMC 356 time base can be GPS- and IRIG-B- synchronized. Depending on the synchronization method of your choice, use either the CMGPS synchronization unit or the CMIRIG-B interface box.

  • Page 37: Ll Out 1-6 (Low Level Outputs 1-6)

    The low level outputs are short-circuit-proof and continually monitored for overload. Connect the external amplifier to the CMC 356 low level outputs. Use the connecting cable that was supplied with the amplifier. For more detailed information please refer to the technical data section 6.3.5, "Low Level Outputs "LL out"...
  • Page 38 CMC 356 Reference Manual...

  • Page 39: Technical Data

    Technical Data ECHNICAL Guaranteed Values: • General: The values are valid for the period of one year after factory calibration, within 23 °C ± 5 °C at nominal value and after a warm-up time greater than 25 min. • Guaranteed values from the generator outputs: The values are valid in the frequency range from 10 to 100 Hz unless specified otherwise.

  • Page 40: Insulation Coordination

    Measurement category CAT III / 300 V (BINARY / ANALOG CAT IV / 150 V INPUTS) Functional groups on CMC 356 front panel: VOLTAGE OUTPUT, CURRENT OUTPUT (A, B), AUX DC, BINARY OUTPUT, BINARY / ANALOG INPUT, ANALOG DC INPUT...

  • Page 41: Outputs

    Technical Data Outputs For block diagrams of the available generator outputs, please refer to section 4.1, "Block Diagram" on page 20. Table 6-3: Analog current, voltage, General Generator Outputs Data and LL outputs. (analog current and voltage outputs, outputs "LL out") Frequency ranges sinusoidal signals 10 …...

  • Page 42: Extended Frequency Range

    Extended Frequency Range In selected Test Universe modules (e.g., Harmonics and PQ Signal Generator) the CMC 356 supports a mode for generating stationary signals up to 3 kHz on the voltage outputs and the low-level outputs. This mode corrects the phase and gain errors of the output filter. The 3 dB bandwidth of this filter limits the amplitude at 3 kHz to about 70 % of the maximum range value.

  • Page 43: Current Outputs

    Technical Data 6.3.2 Current Outputs Table 6-5: Outputs of current groups Current Outputs (Groups A and B) A and B Output currents 6-phase AC (L-N) 6 x 0 ... 32 A (Group A and B) Footnotes: 3-phase AC (L-N) 3 x 0 ... 64 A (Group A + B parallel) 1.Data for three-phase 2, 3 2-phase AC (L-L)
  • Page 44 S: 64A (L-L) [VA] 1400 P: 64A (L-L) [W] S: 128A (LL-LN) [VA] 1200 P: 128A (LL-LN) [W] 1000 Output Current [Arms] Output current in A For additional information refer to section 7.2, "Single-Phase Operation of the CMC 356" on page 92.
  • Page 45 Technical Data Figure 6-3: Typical compliance 160.0 voltage (50/60 Hz) 140.0 low sensitive 32 A (L-L-L-L) 1~ low sensitive 32A (L-L-L-L) 120.0 high sensitive 32 A (L-L-L-L) 1~ high sensitive 32A (L-L-L-L) low sensitive 64 A (L-L//L-L) 1~ low sensitive 64A (L-L // L-L) high sensitive 64 A (L-L//L-L) 1~ high sensitive 64A (L-L // L-L) 100.0...
  • Page 46 CMC 356 Reference Manual Figure 6-5: Typical continuous output current and output power at 23 °C; single-phase mode Current in A Figure 6-6: Typical continuous output current and output power at 23 °C; three- and six-phase mode Current in A The continuous operating range is given by the area below the curves in the figure 6-5 and 6-6 above.
  • Page 47 Technical Data Table 6-6: Typical duty cycles for 6 x 32 A (L-N) 3 x 64 A (L-N) operation at ambient duty toff duty toff temperature of 23 °C cycle [min] cycle [min] 0 ... 25 0 ... 1200 100% >...

  • Page 48: Voltage Outputs

    CMC 356 Reference Manual 6.3.3 Voltage Outputs Table 6-7: CMC 356 voltage outputs 4 Voltage Outputs Output voltages Footnotes: 3-phase AC (L-N) 3 x 0 ... 300 V 1.a) V (t) automatically 4-phase AC (L-N) 4 x 0 ... 300 V...

  • Page 49: Power Diagram For Three-Phase Operation

    Technical Data 6.3.3.1 Power Diagram for Three-Phase Operation Figure 6-7: typical Power diagram for three-phase operation guaranteed Output voltage in V...

  • Page 50: Power Diagram For Single-Phase Operation

    CMC 356 Reference Manual 6.3.3.2 Power Diagram for Single-Phase Operation Also refer to section 7.2.4, "Single-Phase Voltage" on page 95. Figure 6-8: typical Single-phase operation guaranteed Output voltage L-N in V Figure 6-9: Single-phase operation typical guaranteed Output voltage L-L in V...

  • Page 51: Operational Limits In Conjunction With Mains Supply

    Technical Data 6.3.4 Operational Limits in Conjunction with Mains Supply Principally, the maximum output power of the CMC 356 is limited by the mains input supply voltage. For mains voltages of 115 V or smaller, it is also possible to supply the CMC 356 with two phases (L-L) instead of the normal phase-neutral (L-N) operation in order to increase the supply voltage (115 V * sqrt(3) = 200 V).

  • Page 52: Low Level Outputs "Ll Out" For External Amplifiers

    In addition, each SELV interface connector provides a serial digital interface (pins 8-16; see below) that transmits control and monitor functions between the CMC 356 and the external amplifiers. Supported devices are the CMA 156, CMA 56, CMS 156, CMS 251 and CMS 252 (see also 9.6.7, "CMLIB A"...
  • Page 53 GND is connected to protective earth (PE). Input OMICRON amplifier nominal: 0 ... 5 V If you purchased the option FL-6, the maximum output frequency is constrained to 599 Hz. Values at nominal voltage (10 V ), 50/60 Hz, and 20 kHz measurement bandwidth.

  • Page 54: Low-Level Binary Outputs ("Ext. Interf.")

    < 3 µs (V = 5 V, R = 4.7 k extern pullup Connection Connector "ext. Interf." (CMC 356 rear side) Insulation Reinforced insulation to all other potential groups of the test equipment. GND is connected to protective earth (PE).
  • Page 55 Figure 6-12: Circuit diagram of Rear side "ext. Interf." binary of CMC 356 transistor outputs 11 = 5 ... 15 V extern Inside of CMC 356 pullup Ω 22 k 16 V Binary outputs 11 ... 14 "ext. Interf." Ω...

  • Page 56: Binary Output Relays

    CMC 356 Reference Manual 6.3.7 Binary Output Relays Table 6-13: Data of binary output 4 Binary Output Relays (Binary Outputs 1-4) relays Type Potential-free contacts; software-controlled AC loading 300 VAC; I 8 A; P 2000 VA DC loading 300 VDC; I 8 A;...

  • Page 57: Dc Supply (Aux Dc)

    Technical Data 6.3.8 DC Supply (AUX DC) Table 6-14: DC Voltage supply DC Supply (AUX DC) AUX DC Voltage ranges 0 ... 66 V (max. 0.8 A) 0 ... 132 V (max 0.4 A) 0 ... 264 V (max. 0.2 A) Power Max.

  • Page 58: Inputs

    CMC 356 Reference Manual Inputs 6.4.1 Binary Inputs Note: If option ELT-1 is installed, only the general binary input data given in the following Table 6-15 are valid. For detailed information about the option ELT-1, please refer to section 6.10, "Option ELT-1" on page 67.
  • Page 59 Applies to positive voltage signal edge; value shown in % of reading (rd.) + % of upper range value (rg.) Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)" on page 28.
  • Page 60 The debounce function is placed after the deglitch function described above and both are realized by the firmware of the CMC 356 and are calculated in real time. The figure below illustrates the deglitch function. On the right-hand side of the figure, the debounce time is too short.

  • Page 61: Counter Inputs 100 Khz (Low Level)

    2 V Rise & fall times < 1 ms Max. input voltage ± 30 V Connection Socket "ext. Interf." (rear CMC 356) Insulation Reinforced insulation to all other potential groups of the test equipment. GND is connected to protective earth (PE).
  • Page 62 CMC 356 Reference Manual Figure 6-17: Rear side Circuit diagram of of CMC 356 +15 V "ext. Interf." counter inputs Inside of 1 and 2 CMC 356 Ω 22 k Counter inputs 1 & 2 "ext. Interf." Ω 100 k...

  • Page 63: Technical Data Of The Ethernet Ports

    ETH2: a 100Base-FX (optical fiber) Ethernet port. With the introduction of the front panel control device CMControl, the CMC 356 test sets are now equipped with a NET-1B board that holds two identical PoE (Power over Ethernet) ports ETH1 and ETH2.

  • Page 64: The Net-1 Board

    CMC 356 Reference Manual 6.5.2 The NET-1 Board Table 6-20: Ethernet port ETH1 Technical data of the NET-1 Ethernet port ETH1 Type 10/100Base-TX (10/100Mbit, twisted pair, auto-MDI/MDIX or auto-crossover) Connector RJ45 Cable type LAN cable of category 5 (CAT5) or better...

  • Page 65: Environmental Conditions

    (17.7 x 5.7 x 15.4 ") Housing IP20 according to EN 60529 Cleaning To clean the CMC 356, use a cloth dampened with isopropanol alcohol or water. Prior to cleaning, always switch off the power switch and unplug the power cord from the mains.

  • Page 66: Safety Standards, Electromagnetic Compatibility (Emc) And Certificates

    CMC 356 Reference Manual Safety Standards, Electromagnetic Compatibility (EMC) and Certificates Table 6-25: CE conformity, certified CE Conformity, Requirements Safety Standards and The product adheres to the specifications of the guidelines of the council of EMC-compatibility the European Community for meeting the requirements of the member states regarding the electromagnetic compatibility (EMC) Directive 89/336/EEC and the low voltage Directive 73/23/EEC.

  • Page 67: Option Elt-1

    Binary/analog inputs and inputs for analog DC measurement Binary/analog inputs The ELT-1 option enables the CMC 356 to measure analog signals: • Analog DC inputs (+/-10V and either +/-1mA or +/-20mA) for basic transducer testing with the test module QuickCMC.

  • Page 68: General Data

    CMC 356 Reference Manual Using the CMC 356 test set in combination with the Test Universe module Transducer enables advanced testing of multifunctional single-phase and three-phase electrical transducers with symmetrical or non-symmetrical operating characteristics. The hardware option ELT-1 can either be ordered with the new test set or later as a factory upgrade (the CMC 356 needs to be returned to OMICRON).

  • Page 69: Analog Dc Input (Vdc, Idc)

    Technical Data Four different operating modes are possible: • Multimeter Mode (section 6.10.6) • Harmonic Analysis (section 6.10.7) • Transient Recording (section 6.10.8) • Trend Recording (section 6.10.9) 6.10.2 Analog DC Input (V Figure 6-19: DC measurement unit (analog inputs V The measurement of analog DC signals has been implemented to enable the testing of transducers.

  • Page 70: Accuracy Of The Analog Dc Input

    CMC 356 Reference Manual 6.10.3 Accuracy of the Analog DC Input Note: Exceeding the specified input values can damage the measurement inputs! Table 6-26: DC measurement input DC Measurement Input IDC Measurement ranges 0 ... ±1 mA 0 ... ±20 mA Max.

  • Page 71: Measuring Currents

    Technical Data 6.10.4 Measuring Currents Since the analog inputs of the CMC 356 are voltage inputs, current measurement has to be performed using suitable active current clamps with voltage outputs or shunt resistors. OMICRON offers the C-PROBE1 as a suitable current clamp (refer to section 9.5, "Current Clamp C-PROBE1"...

  • Page 72: Accuracy Of Binary/Analog Inputs With Option Elt-1

    CMC 356 Reference Manual 6.10.5 Accuracy of Binary/Analog Inputs with Option ELT-1 The technical data for the binary inputs change with the installation of option ELT-1. Figure 6-20: ANALOG DC INPUT Simplified diagrams of analog and binary inputs Only available with option ELT-1.

  • Page 73: Multimeter Mode

    Ω Input impedance 162 k (|| 50 pF) Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356 standard, without option ELT-1 installed)" on page 28. 6.10.6 Multimeter Mode This operating mode is designed for measuring steady-state signals (e.g., also non-sinusoidal shaped signals).

  • Page 74: Accuracy Of Ac Measurements

    CMC 356 Reference Manual 6.10.6.1 Accuracy of AC Measurements Conditions: integration time 1 s, measurement signal sinusoidal, excitation 10 - 100 %, accuracy references the measurement full scale values. Table 6-30: Sampling rate 28.44 kHz; Frequency range Accuracy measurement range...
  • Page 75 Technical Data The accuracy data contains linearity, temperature, long-term drift, and frequency. Figure 6-21: Typical frequency Frequency response in the 100 V range Frequency Response in the 100 V Range response with a sampling (SR = 28.44 kHz) (SR = 28.44 kHz) rate of 28.44 kHz and an Maximum+3Sigmamax input voltage of 70 V...

  • Page 76: Channel Cross-Talk

    CMC 356 Reference Manual Figure 6-23: Typical AC linear AC linearity in the 100 V range AC Linearity in the 100 V Range progression at 50 Hz and a Maximum+3Sigmamax sampling rate of 0.04 Minimum-3Sigmamin 28.44 kHz 0.03 0.02 0.01 -0.01...

  • Page 77: Accuracy Of Phase Measurement

    Technical Data 6.10.6.3 Accuracy of Phase Measurement Figure 6-24: Phase error as function of Phase error as function of the input voltage Phase Error as a Function of the input voltage input voltage Phase CH1-CH2; range: 100 V; f = 50 Hz (Phase CH1-CH2, Range:100 V, f = 50 Hz) CH1:10V CH1:70V...
  • Page 78 CMC 356 Reference Manual Figure 6-26: Typical phase error as Phase error as function of input frequency Phase Error as a Function of Frequency function of the input (fs = 28.44 kHz, range = 100 V, Uin = 20 Vrms) (SR = 28.44 kHz, R: 100 V, Uin = 20 Vrm s)

  • Page 79: Accuracy Of Frequency Measurement

    Technical Data 6.10.6.4 Accuracy of Frequency Measurement Figure 6-27: Error in the frequency Error in frequency measurement as a function of the input voltage Error in Frequency Measurem ent as a Function of the input voltage measurement as a (measured over 50 periods) (Measured over 50 Periods) function of the input voltage...

  • Page 80: Accuracy Of Power Measurement

    CMC 356 Reference Manual 6.10.6.5 Accuracy of Power Measurement General The power is calculated from one current channel and one voltage channel:  Active power: * u t ( )*i t ( ) t d -- - Apparent power: S = V...
  • Page 81 Technical Data Table 6-40: Sampling rate Frequency range Power Accuracy 9.48 kHz Typical Guaranteed 10 Hz ... 750 Hz + 0.3 % / - 0.7 % ± 1.8 % 10 Hz ... 750 Hz + 0.3 % / - 0.7 % ±...
  • Page 82 CMC 356 Reference Manual Typical relative error as function of the excitation Figure 6-28: Typical error of the Typical error of apparent power S as function of the excitation Typ. Error apparent pow er S as a function of the excitation apparent power S as (fs = 28.44 kHz, f = 50 Hz)
  • Page 83 Technical Data Figure 6-30: Typical error of the Typical error of reactive power Q as function of the excitation Typ. Error reactive pow er Q as a function of the excitation reactive power Q as a (fs = 28.44 kHz, f = 50 Hz) (fs = 28.44kHz, f=50Hz) function of the excitation, fs = 28.44 kHz, fin = 50 Hz...

  • Page 84: Harmonic Analysis

    CMC 356 Reference Manual Note: • For very small phase shifts (< 0,3 °) and small excitation (< 10 %), too small integration time (< 1 s) or sampling rate 3.16 kHz, the sign of the reactive power cannot definitely be determined.

  • Page 85: Accuracy Of Frequency Measurement

    Technical Data 6.10.7.1 Accuracy of Frequency Measurement The permitted input frequency range depends on the specified sampling rate: Table 6-43: Sampling rate and input Sampling rate Input frequency range frequency range 28.44 kHz 49 Hz ... 3400 Hz 9.48 kHz 17 Hz ...

  • Page 86: Accuracy Of Amplitude Measurement

    CMC 356 Reference Manual 6.10.7.2 Accuracy of Amplitude Measurement The measurement values are given as effective values (rms). The permitted input frequency range for the fundamental wave depends on the specified sampling rate: Table 6-44: Sampling rate and input Sampling rate...

  • Page 87: Accuracy Of Phase Measurement

    Technical Data Table 6-48: Sampling rate Frequency range Accuracy 9.48 kHz Typical Guaranteed 3.16 kHz measurement range fmin ... 100 Hz ± 0.15 % ± 0.4 % 100 mV fmin ... 1 kHz ± 0.2 % / - 0.5 % ±...

  • Page 88: Transient Recording

    Trigger delay (negative) Recording of input signals Note: More details about triggering methods can be found in the OMICRON Test Universe Help and in the practical examples of the ELT-1 option. The maximum length of the recording depends on the settings for the...

  • Page 89: Trend Recording

    Technical Data Table 6-51: The maximum recording Number of Maximum Maximum Maximum time depends on the active recording time [s] recording time [s] recording time [s] number of active channels channels at fs = 28.4 kHz at fs = 9.48 kHz at fs = 3.16 kHz and the sampling frequency...

  • Page 90: Option Llo-2 (Low Level Outputs)

    CMC 356 Reference Manual 6.11 Option LLO-2 (Low Level Outputs) The LLO-2 option ("LL out 7 - 12") represents an additional SELV (SELV = Safety Extra Low Voltage) interface connector holding two independent generator triples. These six high accuracy analog signal sources can serve to either control an external amplifier or to directly provide small signal outputs.

  • Page 91: Increasing The Output Power, Operating Modes

    The CMC 356 has a very large application diversity. The current outputs offer enough output power to test all electromechanical relays. In particular, the CMC 356 offers a variety of types of single-phase operation using its two galvanically separated three-phase current outputs with which the output power from the units can be significantly increased.

  • Page 92: Single-Phase Operation Of The Cmc 356

    CMC 356 Reference Manual Single-Phase Operation of the CMC 356 7.2.1 1 x 32 A High Burden Mode (L-L-L-L) 1 x 0 ... 32 A (±45 A ), max. 140 V , 1 x 1740 VA at 25 A peak Both amplifier groups CURRENT OUTPUT A and CURRENT OUTPUT B are connected in series.

  • Page 93: X 64 A High Burden And High Current Mode (L-L)

    Increasing the Output Power, Operating Modes 7.2.2 1 x 64 A High Burden and High Current Mode (L-L) 1 x 0 ... 64 A (±90 A ), max. 70 V , 1 x 1740 VA at 50 A peak The currents 1 and 2 of each group are phase-opposite. In addition, the groups A and B are connected in parallel.

  • Page 94: X 128 A High Current Mode (Ll-Ln)

    CMC 356 Reference Manual 7.2.3 1 x 128 A High Current Mode (LL-LN) 1 x 0 ... 128 A (±180 A ), max. 35 V , 1 x 1000 VA at 80 A peak Since the current over the N socket is limited to 32 A...

  • Page 95: Single-Phase Voltage

    Increasing the Output Power, Operating Modes 7.2.4 Single-Phase Voltage 1 x 0 ... 300 V, 1 x 200 VA [100 ... 300 V] typical Figure 7-4: Single-phase operation of Load the voltage system (L-N) 1’ N’ 1 x 0 ... 600 V, 1 x 275 VA [200 ... 600 V] typical Figure 7-5: Single-phase operation of Load...

  • Page 96: Two-Phase Operation

    CMC 356 Reference Manual Two-Phase Operation For some applications it is beneficial to have two independent currents, each higher than 32 A , or a higher compliance voltage available. 7.3.1 2 x 64 A High Current Mode (LL-LN) 2 x 0 ... 64 A (±90 A ), max.

  • Page 97: X 32 A High Burden Mode (L-L)

    Increasing the Output Power, Operating Modes 7.3.2 2 x 32 A High Burden Mode (L-L) 2 x 0 ... 32 A (±45 A ), max. 70 V , 2 x 870 VA at 25 A peak The currents 1 and 2 of each group are phase-opposite. Observe the safety instructions given in Section 7.1 on page 91 when using this operating mode.

  • Page 98: Three-Phase Current Mode With High Burden

    CMC 356 Reference Manual Three-Phase Current Mode with High Burden 3 x 0 ... 32 A (±45 A ), max. 70 V , 3 x 860 VA at 25 A peak For loads with three separate phases it is possible to double the available compliance voltage.

  • Page 99: Operation With External Amplifiers

    6 × 250 V / 75 VA for the synchronization in two galvanically separated voltage triples with CMC 356 + CMS 156. For a complete overview of the supported configurations of the CMC 356 and CMA/S amplifiers see the OMICRON Test Universe Help, topic...
  • Page 100 CMC 356 Reference Manual...

  • Page 101: Troubleshooting

    • screenshots or the exact wording of possible error messages. 6. If you call the OMICRON hotline, please have your computer and test set available and be prepared to repeat the steps that caused the problem. To speed up the support, please attach the following diagnostic log files: •...

  • Page 102: Potential Errors, Possible Causes, Remedies

    CMC 356 Reference Manual Potential Errors, Possible Causes, Remedies Some potential disruptions that may occur while operating the CMC 356 are listed below. Try to eliminate them by applying the remedies proposed here. Table 8-1: Troubleshooting the Error Possible causes...

  • Page 103: Overheating

    Troubleshooting Overheating If a thermal shutdown occurs because of loading the voltage or current outputs a long time by high burden, the Test Universe displays the following messages respectively in the Status History window: • “Voltage overtemperature:” followed by a list of the affected outputs “CMC switched off.”...
  • Page 104 CMC 356 Reference Manual...

  • Page 105: Cmc 356-Related Products And Accessories

    RODUCTS AND CCESSORIES This chapter describes the optional equipment for the CMC 356 test set. In the following the amplifiers CMA 56, CMA 156, CMS 156, CMS 251 and CMS 252 are jointly named CMA/S. Please visit the OMICRON Web site www.omicron.at for up-to-date information.

  • Page 106: Cmcontrol-6

    The CMControl is available in two variations: CMControl-6 for CMC 356, CMC 256plus and CMC 256-6, and CMControl-3 for CMC 353. The rugged Ethernet connector ensures reliable communication with the CMC test set.

  • Page 107: Time Synchronization Accessories

    Interf. For detailed information about the CMGPS, please refer to the CMGPS reference manual, the product catalog, or the OMICRON Web site www.omicron.at. For ordering information about the CMGPS, refer to table 9-5, "Order numbers overview" on page 128.
  • Page 108 Antenna For cases that may require an extension of the antenna cable, an optional set of 2 × 20 m cables is available from OMICRON. For ordering information, refer to table 9-5, "Order numbers overview" on page 128. Figure 9-5:...

  • Page 109: Cmirig-B

    9.3.2 CMIRIG-B Via the CMIRIG-B interface box you can connect devices to the CMC 356 test set that either transmit or receive the IRIG-B time reference signal (DC level shift protocol B00x). That way, two or more CMC test sets are synchronized.
  • Page 110 ± 5µs typ., ± 20µs guar. - Voltage outputs ± 1µs typ., ± 5µs guar. Valid for CMC 356 output frequencies < 100Hz and re-synchronized analog output signals. For ordering information about the CMIRIG-B, refer to table 9-5, "Order numbers overview" on page 128.

  • Page 111: 100Tx To 100Fx-Sc Converter

    Converter Order number: VEHZ0021 This converter connects the CMC 356 to a network via fiber optics. The 100TX to 100FX-SC Converter transfers data from a 10/100Base-TX copper to a fiber interface. It is designed to receive both data and power...

  • Page 112: Current Clamp C-Probe1

    "-" = black For detailed information about the C-PROBE1 current clamp and the option ELT-1, please refer to the respective reference manuals, the product catalog, or visit the OMICRON Web site www.omicron.at. Table 9-4: Max. voltage of the leads 600 V...

  • Page 113: Accessories For Meter Testing

    CMC 356-Related Products and Accessories Accessories for Meter Testing 9.6.1 Scanning Head OSH256 The passive optical scanning head OSH256 detects the status of an LED, that is either an optical pulse output from an energy meter or the binary status of a protective relay or other similar optical source.

  • Page 114: Interface Box Ifb256

    CMC 356 Reference Manual The OSH256 connects to the EXIF socket of a CMC 356 by means of the adapter cable VEHK0010 (refer to section 9.6.5, "Adapter Cable for Scanning Heads" on page 117) or a CMLIB B (refer to section 9.6.6, "CMLIB B"...

  • Page 115: Scanning Head Tk 326

    TK 326 Order number: VEHZ2008 The TK 326 connects to the EXIF socket of a CMC 356 by means of the adapter cable VEHK0010 (refer to section 9.6.5, "Adapter Cable for Scanning Heads" on page 117) or a CMLIB B (refer to section 9.6.6,...

  • Page 116: Scanning Head Tvs 6.15/1

    The magnetic scanning head TVS 6.15/1 Order number: VEHZ2004 The TVS 6.15/1 connects to the EXIF socket of a CMC 356 by means of the adapter cable VEHK0010 (section 9.6.5 on page 117) or a CMLIB B (section 9.6.6 on page 118).

  • Page 117: Adapter Cable For Scanning Heads

    Adapter Cable for Scanning Heads The adapter cable VEHK0010 connects the scanning heads OSH256, TK 326 and TVS 6.15/1 directly to a CMC 356 test set. The scanning heads connection cable is simply extended by the adapter cable plugging the 5-pole LEMO connectors into each other.

  • Page 118: Cmlib B

    • if a reference meter is used and therefore two pulse inputs are required • if the binary transistor outputs of a CMC 356 test set need to be accessed. For these applications, the CMLIB B is used as interface.

  • Page 119: Cmlib A

    CMA 156 and CMS 156. Applications for CMLIB A: • Connection of amplifiers that do not have an OMICRON connection socket to the CMC analog low level signal outputs. • Connection of OMICRON amplifiers to controlling sources that do not have an OMICRON connection socket.

  • Page 120: Cpol Polarity Tester

    The CMC 356 injects a special continuous voltage or current test signal at one point. Then CPOL checks the polarity at all terminals and provides a clear indication as to whether the polarity is OK (green LED) or not (red LED).

  • Page 121: Connection Cable For Ref 54X Relays (Abb) With Low Level Signal Inputs

    CMC 356-Related Products and Accessories 9.6.9 Connection Cable for REF 54x Relays (ABB) with Low Level Signal Inputs This connection cable with twin-BNC clamp plugs type AMPHENOL 31-224 is tailored to connect ABB relays of the REF 54x series (with AMPHENOL twin-BNC bulkhead receptacles type 31-223) to the low level outputs of the CMC 356 (16-pole LEMO connector).

  • Page 122: C-Shunt

    C-Shunt C-Shunt 1 and C-Shunt 10 are precision shunts for current measurements. They can be directly inserted into the binary/analog inputs of a CMC 356 with ELT-1 option. The ELT-1 option enables the CMC 356 to measure analog signals; see 6.10 ”Option ELT-1” on page 67.

  • Page 123: Wiring Accessories

    CMC 356 test set. They can, however, also be ordered separately. 1. Flexible test lead Order number: VEHK0112 2 m (6 ft.) test lead to connect the CMC 356 output to other safety sockets of, for example, amplifiers, test objects or to banana adapters in control cabinets.

  • Page 124: Optional Cmc Wiring Accessory Package

    CMC 356 Reference Manual 3. Flexible terminal adapter Order number: VEHS0009 Flexible terminal adapter to connect to screw-clamp terminals. Specification: 1000 V/32 A Amount supplied: 12 pieces 9.7.2 Optional CMC Wiring Accessory Package Figure 9-22: The CMC Wiring Accessory Package...
  • Page 125 1. Flexible test lead adapter 5 cm 5 cm (2") test lead adapter with retractable sleeve to connect the CMC 356 output to non-safety sockets in combination with a regular flexible 2 m (6 ft.) test lead as shown at section 9.7.1.
  • Page 126 CMC 356 Reference Manual 4. Flexible terminal adapter Flexible terminal adapter to connect to screw-clamp terminals. Identical to article of standard delivery scope listed under 9.7.1. Specification: 1000 V/32 A Amount: 12 pieces 5. M4 (0.15") Cable Lug Adapters Cable lug adapters for M4 (0.15") screws to connect regular test leads to screw-clamp terminals of SEL/ABB/GE relays (and others).

  • Page 127: Ordering Information

    CMC 356-Related Products and Accessories Ordering Information This section lists the order numbers for optional equipment of the CMC 356 test set. Figure 9-23: Plug for generator Connection cables I CMC 356 test set combination socket VEHS0103 Generator combination cable VEHK0103 Test object (relay, meter...)
  • Page 128 VEHV1010 CMS 156 Voltage/current amplifier (3×250 V, 3×25 A) VEHV1030 → CMControl-6 ( section 9.2) CMControl-6; upgrade for an existing CMC 356 (includes soft VEHO2806 bag VEHP0014) CMControl-6; add-on for a new CMC 356 VEHO2805 → CMIRIG-B Interface box ( section 9.3.2)
  • Page 129 CMC 356-Related Products and Accessories Article Order no. Meter testing accessories OSH256 Passive scanning head, suction and adhesive VEHZ2006 → fixation ( section 9.6.1) IFB256 Interface Box for scanning head OSH256; used for relay testing when binary information → section 9.6.2) VEHZ1152 originates from a relay's LED.
  • Page 130 12 pieces 5. M4 (0.15") Cable Lug Adapters, 1000 V/20 A, 20 pieces 6. M5 (0.2") Cable Lug Adapters, 1000 V/20 A, 10 pieces 7. Cable Tie (Velcro fastener), length 150 mm (6"), 10 pieces 8. OMICRON Accessory Bag, 1 piece...
  • Page 131 Article Order no. Heavy-duty transport case with wheels and extendable VEHP0021 handle for the CMC 356 test set with or without CMControl-6, for CMB IO-7, and for CMA or CMS amplifiers. Soft bag for CMC 356 test set VEHP0012 Soft bag for CMC 356 test set with attached CMControl-6...
  • Page 132 CMC 356 Reference Manual...

  • Page 133: Appendix

    Appendix PPENDIX The OMICRON Bootloader software The OMICRON Bootloader software includes software parts developed by: • Intel Corporation (IXP400 SW Release version 2.3) • Intrinsyc Software (Intrinsyc Bootloader) • Swedish Institute of Computer Science, Adam Dunkels (lwIP TCP/IP stack) •...
  • Page 134 The OMICRON Bootloader Software - Copyright Notices 3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by Intrinsyc Software. 4. The name of Intrinsyc may not be used to endorse or promote products derived from this software without specific prior written permission.
  • Page 135 Appendix zlib (Jean-loup Gailly and Mark Adler) Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler. This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1.
  • Page 136 The OMICRON Bootloader Software - Copyright Notices...

  • Page 137: Contact Information / Technical Support

    6833 Klaus, Austria Phone: +43 5523 507-333 E-Mail: support@omicron.at Web: http://www.omicron.at For addresses of OMICRON offices with customer service centers, regional sales offices or offices for training, consulting and commissioning, please see the Contact section of our Web site http://www.omicron.at.
  • Page 138 Contact Information / Technical Support...

  • Page 139: Index

    NDEX amplifier Numerics CMA current amplifier ........105 CMS voltage amplifier ........105 current amplifier (output) of CMC 356 ....22 599 Hz restriction ......13 voltage amplifier (output) of CMC 356 ....21 amplifiers ordering information .......... 128 apparent power calculation ........80 accessories adapter cable for scanning heads ......117...
  • Page 140 ........... 41 ordering information ...........128 output resolution ..........41 C-Shunt (accessory) ..........122 front panel components of CMC 356 ......27 current max. input current INPUT IDC ......70 front panel control CMControl ........106 max. input current INPUT VDC ......70 fuse changing the ............
  • Page 141 ........66 for CMC 356 (overview) ........12 option ELT-1 ............67 option LLO-2 ............90 ordering information for CMC 356 accessories ..127 OSH256 scanning head ............113 LL out (SELV low level outputs) ........52 output power per phase when group A || group B .....
  • Page 142 CMC 356 Reference Manual reactive power calculation ..........80 Technical Support ............ 137 temperature relative humidity ............65 operating temperature of CMC 356 ..... 65 resolution storage temperature ..........65 current outputs .............43 LL out 1-6 .............53 temperature drift of output signals ......41 phase output ............41...

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