Omicron CMC 256plus

High precision Relay Rest set and universal calibrator

The CMC 256plus is an excellent choice for applications requiring high accuracy. It is not only an excellent test set for protection devices of all kinds, but also a universal calibrator. This unit’s high precision allows it to calibrate a wide range of measuring devices, including: energy meters of class 0.2, measuring transducers, power quality measurement 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.

Available on back-order

Key features

  • Protection test set and universal calibrator in one device
  • Testing of all relay generations – electromechanical, static, numerical, IEC 61850
  • Highly accurate test signals. For meter testing: The sources are the reference – no additional reference meters are required
  • Integrated network for testing IEC 61850 IEDs
  • 10-channel analog measurement and transient recording functionality


Omicron CMC 256plus Datasheet