The OMICRON CMC 500 is a modular, multiphase protection relay test set and commissioning tool. It is designed for efficient, reliable, and safe testing of protection devices and power system components in substations. It supports both traditional and IEC 61850-based digital substations.
Highly Efficient
Time-saving test procedures using standardized libraries (Protection Testing Library - PTL)
Fast setup with reusable test plans
Quick manual tests via mobile app (CMC Swift)
Time savings of up to 80% for recurring tests
Versatile
Tests relays, transformers, breakers, etc.
Hybrid signal recording (analog + digital)
Up to 7 voltage and 10 current outputs
Test relays from ABB to ZIV using pre-defined templates
Safe
Multi-stage safety features (INTERLOCK key, emergency stop, operational mode button)
Complies with EN 50191 and ISO 13849-1
Cybersecure
Secure Boot, encrypted communications, TPM 2.0 chip
Compliant with ISO/IEC 11889
IEC 61850 Ready
Supports GOOSE, MMS, Sampled Values
Precision time sync (PTP IEEE 1588-2008)
Testing Capabilities
Two Testing Paradigms
Parameter-Based (Test Universe): Relay-specific testing with detailed result comparisons
System-Based (RelaySimTest): Realistic grid simulation to validate entire system response
Technical Highlights
Analog Outputs
Voltage: Up to 4 × 300 V (600 V in L-L mode)
Current: Up to 4 × 30 A (parallel up to 90 A or 180 A with Type H)
THD+N: < 0.05%
Frequency range: Up to 5 kHz (3 kHz for Type H)
High amplitude outputs: Up to 1,200 W at 75 A (Type H)
Accuracy
Amplitude Accuracy (Current): Typically ±0.05% + 0.01
Amplitude Accuracy (Voltage): Typically ±0.03% + 0.005
Phase Accuracy: Typically 0.03° (current), 0.02° (voltage)
Output Duration
Up to 15 A continuous
30 A or 60 A for 2 seconds (pulsed mode)
Device Variants
| Variant | Currents | Voltages | Best Use |
|---|---|---|---|
| USH | 10 | 7 | Highest flexibility |
| USX | 7 | 7 | Lightweight, precise |
| UHH | 10 | 4 | Highest output power |
| UHX | 7 | 4 | Lightweight, powerful |
| VHX | 4 | 4 | Distribution grid |
CMC 500 Variant Comparison Table
| Feature / Variant | USH | USX | UHH | UHX | VHX |
|---|---|---|---|---|---|
| Best for | Maximum flexibility & functions | Lightweight, high accuracy (1 A relays) | Highest current output & power | Lightweight, high current (5 A relays) | Compact for distribution grids |
| Current Outputs | 10 (4×30 A + 3×60 A + 3×60 A) | 7 (4×30 A + 3×30 A) | 10 (4×30 A + 6×60 A) | 7 (4×30 A + 3×60 A) | 4 (3×60 A + 1×30 A) |
| Single-phase Current Max | 360 A | 180 A | 450 A | 270 A | 180 A |
| Voltage Outputs | 7 (4 + 3) × 300 V | 7 (4 + 3) × 300 V | 4 × 300 V | 4 × 300 V | 4 × 300 V |
| Max Output Power – Current (AC) | 1200 W @ 75 A | 630 W @ 39 A | 1200 W @ 75 A | 900 W @ 30 A | 900 W @ 30 A |
| Max Output Power – Voltage (AC) | 405 W @ 300 V | 405 W @ 300 V | 405 W @ 300 V | 405 W @ 300 V | 405 W @ 300 V |
| Output Duration | 30 A: 2 s on, 10 s off ≤15 A: Continuous | Same as USH | Same as USH | Same as USH | Same as USH |
| Frequency Range | 0 – 5 kHz (U/S/V), 0 – 3 kHz (H) | Same | Same | Same | Same |
| DC Measurement (optional) | Yes | Yes | Yes | Yes | Yes |
| Binary Inputs/Outputs | 10 / 4 | 10 / 4 | 10 / 4 | 10 / 4 | 10 / 4 |
| Weight | 14.9 kg | 12.1 kg | 15.6 kg | 12.9 kg | 12.4 kg |
Other Interfaces and Inputs
Binary I/O: 4 outputs (relays), 10 inputs (configurable as analog or digital)
Aux DC Output: 12–264 VDC, up to 120 W
Control Interfaces: Ethernet (3x), USB-C
DC Measurement Inputs: ±10 mV to ±10 V, ±1 mA to ±20 mA
Compliance & Environment
Standards: IEC/EN 61010, FCC, UL, IEC 61850-9-3
Operating temp: –25 to +50 °C
Weight: 12.1 to 15.6 kg (depending on model)