BENDER IRDH275-435 B91065100 Insulation monitor

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.
In combination with a coupling device, the devices can also be used for higher voltages.
An external supply voltage allows de-energised systems to be monitored too. For door
mounting into distribution panels, refer to type IRDH375(B).