BENDER IRDH275B-427 ABB REF 3AXD50000000928 MONITORING RELAY

NEW AND UNUSED

Nominal Voltage AC 0…793 V / DC 0…650 V*

Supply Voltage   AC 88…264 / DC 77…286 V*

Datasheet            Manual           ABB Ref 3AXD50000000928 BENDER Datasheet

Insulation monitoring device for unearthed AC, AC/DC and DC systems (IT systems)

The ISOMETER® of the IRDH275 series is designed to monitor the insulation resistance of unearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…650 V. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. In these systems often high leakage capacitances against earth occur due to interference suppression measures. The IRDH275 automatically adapts itself to the existing system conditions.