ABB Insulation Monitoring Relay, 1, 3 Phase, DPDT, 0 → 400 V ac, 0 → 600V dc, DIN Rail

CM-IWS series relays serve to monitor insulation resistance and can be configured to the requirements of the applications. All devices have two different terminal versions: Screw Connection Technology and Easy Connect Technology.

Rated control supply voltage 24-240V ac/dc
The device can monitor control circuits (single-phase) and main circuits (3-phase)
Prognostic measuring principle with superimposed square wave signal
Two measuring ranges 1-100 kΩ and 2-200 kΩ
Interrupted wire detection configurable
Non-volatile fault storage configurable
Open/closed circuit principle configurable
3 LEDs indicators of operational states