Insulation monitoring relay KRM161x series

trip circuitACDIN rail

KRM161x - Isolated AC Insulation Trip Relay Insulation relay for non grounded systems 0-660V Line Voltage. Up to 1400V with HV adapter Non isolated analogue output (C-version) "IDV" measuring principle KRM161B/C monitors resultant insulation level between a non-grounded single or three phase AC mains and its protective earth. It can monitor both live or non-live network. The trip level is factory set and relay will operate after a delay of approximately two seconds. Relay is fail-safe and energises when powered. Link terminal 6 and 10 to make a non-latching relay. Only ONE KRM16x can be connected to each IT-system. KRM161B/C unit uses a superimposed DC monitoring voltage and so only one unit can be connected to each isolated system.