Insulation monitoring relays

Reliable insulation monitoring of your IT system

The insulation monitoring relays of the CM-IWx range guarantee a continuous insulation monitoring of an IT system. The devices recognize insulation faults as they develop and trip immediately if the value has fallen below the minimum set threshold (1-200 kOhm). This ensures a reliable operation of the system and prevents operational interruption caused by a second, more severe, insulation fault which may lead to a short circuit tripping the main circuit breaker.

Main benefits

• Down-time reduction
• Safe and reliable operation
• Easy to install

Main features

• Monitoring of system voltages up 1000 V DC and 690 V AC
• Monitoring of system leakage capacitances up to 2000 µF
• All kind of systems can be monitored: 2-wire, 3-wire, 4-wire as well as battery systems
• Prognostic measuring principle
• Interrupted wire detection configurable
• Non-volatile fault storage configurable