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The CMC 256 Plus is a high precision relay test set and universal calibrator.

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Transport Case 28kg 60L 45W 35H
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The CMC256 plus is the first choice for applications requiring very high accuracy. This unit is not only an excellent test set for protection devices of all kinds but also a universal calibration tool.

Its high precision allows the calibration of a wide range of measuring devices, including: energy meters of class 0.2, measuring transducers, power quality measurement devices and phasor measurement units (PMU), devices and phasor measurement units (PMU). Its unique accuracy and flexibility make the CMC 256plus ideal for protection and measurement equipment manufacturers for research and development, production and type testing.


Key features:

• Powerful current sources for testing even high-burden electromechanical relays

• High current amplitudes for 5 A relay testing

• High accuracy and versatility for testing static and numerical relays of all types

• Universal calibrator

• Power system Simulator


Standard Accessories: Transport case, Connection adaptors, Software CD, Test Leads x 12, Computer interface cables

Power Supply: 100 – 240 VAC Generator Outputs Data Please refer to detailed specifications in user manual

Voltage outputs: 4 x independent sources, fully configurable AC/DC 0-300V

Generator Combination socket: 3 x 300 v and 3 x 25 A

Current Sources: 6 x 12.5 A or 3 x 25 A or 1 x 75 A independent sources, fully configurable

Binary Input Channels: 10 Potential-free or DC-voltage compared to threshold voltage

Binary Output Relays: 4 Binary Output Relays (Binary Outputs 1-4), Potential free, independently controlled

DC Aux Supply Output: 0 … 264 VDC (max. 50W) Operating Temperature/Humidity Range 0 to 50°C and 20 to 95%RH (no condensation)

Dimensions: 600mm x 450mm x 350 mm

Weight (instrument only): 13.8kg

Resources & Downloads

Data Sheet

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omicron 256 plus relay test set