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The CMC 356 is the universal solution for testing all generations and types of protection relays. Its powerful six current sources (three-phase mode: up to 64 A / 860 VA per channel) with a great dynamic range, make the unit capable of testing even high-burden electromechanical relays with very high power demands.
The CMC 356 is the first choice for applications requiring the highest versatility, amplitude and power. Commissioning engineers will particularly appreciate its ability to perform wiring and plausibility checks of current transformers, by using primary injection of high currents from the test set.
Key Features |
Powerful current sources for testing high-burden electromechanical relays |
High current amplitudes for 5 A relay testing |
High accuracy and versatility for testing digital and static relays of all types |
Integrated network interface for testing IEC 61850 IEDs |
Technical Specifications1 | |||
Omicron CMC 356 (VE002801) | |||
Setting range | |||
Current amplifier | 6-phase AC (L-N) | 6 x 0 ... 32 A | |
3-phase AC (L-N) | 3 x 0 ... 64 A (Group A II B) | ||
1-phase AC (LL-LN) | 1 x 0 ... 128 A (Group A II B) | ||
DC (LL-LN) | 1 x 0 ... ±180 A (Group A II B) | ||
Setting range | |||
Power | 6-phase AC (L-N) | 6 x 430 VA typ. at 25 A | 6 x 250 W guar. at 20 A |
3-phase AC (L-N) | 3 x 860 VA typ. at 50 A | 3 x 500 W guar. at 40 A | |
1-phase AC (LL-LN) | 1 x 1740 VA typ. at 25 A | 1 x 1100 W guar. at 20 A | |
DC (LL-LN) | |||
Accuracy | Error r < 0.05 % rd2 + 0.02 % rg. 2 typ | ||
Error r < 0.15 % rd + 0.05 % rg. Guar. | |||
Distortion (THD+N) 3 | 0.05 % typ., <0.15 % guar | ||
Resolution | 1 mA | ||
Max. compliance voltage (L-N)/(L-L)/(L-L-L-L) | 35 Vpk / 70 Vpk / 140 Vpk | ||
Amplifiers, general | |||
Frequency | |||
Range sine signals4 | 10 ... 1000 Hz | ||
Range harmonics / interharmonics | Voltage: 10 ... 3000 Hz5 Current: 10 ... 1000 Hz | ||
Range transient signals | DC ... 3.1 kHz5 | ||
Resolution | < 5 μHz | ||
Phase | |||
Resolution | 0.001° | ||
Error at 50 / 60 Hz | Voltage: 0.02° typ., < 0.1° guar. Current: 0.05° typ., < 0.2° guar.3 | ||
Bandwidth (-3 dB) | 3.1 kHz | ||
Voltage amplifier | |||
4-phase AC (L-N) | 4 x 0 ... 300 V | ||
2-phase AC (L-L) | 2 x 0 ... 600 V | ||
DC (L-N) | 4 x 0 ... ±300 V | ||
Power | |||
4-phase AC (L-N) | 4 x 75 VA typ. at 100 ... 300 V | 4 x 50 VA guar. at 85 ... 300 V | |
3-phase AC (L-N) | 3 x 100 VA typ. at 100 ... 300 V | 3 x 85 VA guar. at 85 ... 300 V | |
1-phase AC (L-L) | 1 x 275 VA typ. at 200 ... 600 V | 1 x 250 VA guar. at 200 ... 600 V | |
Accuracy | Error r < 0.03 % rd2 + 0.01 % rg2. typ. | ||
Error r < 0.08 % rd + 0.02 % rg. Guar | |||
Distortion (THD+N) 3 | 5 mV / 10 mV in range 150 V / 300 V | ||
Resolution | 150 V / 300 V | ||
Low level outputs | |||
Number of outputs | 6 (12 with Option LLO-2) | ||
Setting range | ion LLO-2) Setting range 0 ... ±10 Vpk | ||
Auxiliary DC supply | |||
Voltage ranges, max. current | 0 ... 264 VDC, 0.2 A | ||
0 ... 132 VDC, 0.4 A | |||
0 ... 66 VDC, 0.8 A | |||
Binary inputs | |||
Number | 10 (5 potential groups) | ||
Trigger criteria | Toggling of potential-free contacts or DC voltage compared to threshold voltage | ||
Ranges | 20 V / 300 V If equipped with ELT-16: 100 mV / 1 V / 10 V / 100 V / 600 V | ||
Sample rate | 10 kHz (resolution 100 µs) | ||
Binary outputs | |||
Type | 4 relay | ||
4 transistor | |||
Relay breaking capacity | Imax: 8 A / Pmax: 2000 VA at 300 VAC | ||
Imax: 8 A / Pmax: 50 W at 300 VDC |
1 The full technical specifications are available on request. All data specified are guaranteed, except where indicated otherwise. OMICRON guarantees the specified data for one year after factory calibration, within 23 °C ±5 °C / 73 °F ±10 °F in the frequency range from 10 to 100 Hz and after a warm-up phase > 25 minutes
2 rd. = reading, rg. = range
3 THD+N: Values at 50/60 Hz, 20 kHz measurement bandwidth
4 For current outputs amplitude derating at > 380 Hz
5 Amplitude derating at > 1000 Hz
6 The ELT-1 hardware option turns the ten binary inputs into multifunctional analog AC and DC voltage measuring inputs and adds two DC measuring inputs (0 … 10 V / 0 … 20 mA) for transducer testing