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

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