Omicron CMC 256-6 Voltage & Protective Relay Test Set | Power System Commissioning Unit

OMICRON electronics CMC 256-6 is a professional multifunctional test set designed for testing, commissioning, and maintenance of voltage, current, and protective relays in power transmission and distribution systems. This unit is widely used by utilities, substations, industrial plants, and service engineers for precise relay testing and secondary injection applications.

The CMC 256-6 provides high-accuracy analog signal generation for voltage and current simulation, allowing comprehensive testing of protection schemes, relay logic, and control circuits. The device features multiple analog outputs, integrated power supply, and robust industrial enclosure suitable for field and laboratory environments.

This model is part of the well-known OMICRON CMC test system family, recognized globally for reliability, measurement accuracy, and long-term service support.

🔧 Key Technical Specifications

• Manufacturer: OMICRON electronics

• Model: CMC 256-6

• Type: Protective Relay Test Set / Voltage & Current Injection Unit

• Function: Secondary injection testing of protection relays

• Analog DC Inputs:

  • 0…20 mA

  • 0…±10 V

• Application Areas:

  • Voltage protection relays

  • Overcurrent and distance protection

  • Substation commissioning

  • Power system maintenance and diagnostics

• Power Supply:

  • IEC power inlet

  • Fuse: T10AH / 250V

• Safety:

  • High-voltage warning (up to 1 kV inside)

  • Integrated cooling fan

• Build Type: Portable industrial test equipment

• Compliance: CE

• Country of Origin: Austria

🏭 Typical Applications

• Power substations

• Transmission and distribution networks

• Relay protection testing laboratories

• Industrial power systems

• Utility commissioning and maintenance teams