The Omicron CMC 256plus is a precision relay test set built for applications where exceptional accuracy and stability are critical. Designed for testing protection relays, calibrating energy meters and transducers, and simulating complex power system conditions, the CMC 256plus is trusted worldwide in laboratories, substations, and utility environments. Compact yet powerful, it combines portability with unmatched accuracy, making it the professional choice for engineers who demand the highest performance standards.
Key Features & Benefits
Ultra-high accuracy – Voltage and current outputs with better than 0.01% accuracy, ideal for precise testing and calibration.
Flexible outputs – Six current and four voltage sources provide stable signals for a wide range of relay applications.
Perfect for meter testing – Ensures reliable calibration of energy meters and transducers to meet compliance requirements.
IEC 61850-ready – Supports testing of modern digital relays and communication-based protection systems.
Advanced automation – Integrates seamlessly with Omicron Test Universe and RelaySimTest for efficient, repeatable workflows.
Portable and field-friendly – Lightweight design makes it easy to transport without compromising performance.
Technical Highlights
Current Sources: 6 × 12.5 A (continuous)
Voltage Sources: 4 × 300 V
Accuracy: Better than 0.01% for both voltage and current outputs
Interfaces: USB, Ethernet, IEC 61850 support
Software: Compatible with Test Universe & RelaySimTest
