IRDH275B-427 | BENDER DC Insulation Monitor IMD

ISOMETER® IRDH275 Insulation monitoring for unearthed AC,AC/DC systems 0…793 V, DC 0…650 VNominal voltage extendable via couplingdeviceTwo separately adjustable response values1 kΩ…10 MΩAMPPlus measurement methodAutomatic adaptation to the systemleakage capacitanceInfo button to display device settingsand system leakage capacitanceSelf monitoring with automatic alarmAutomatic self test, selectableConnection for external kΩ indicationTest and reset button• External test/reset button can be connectedTwo separate alarm relays with twopotential-free changeover contactsN/O or N/C operation, selectableBacklit LC displayRS-485 interfaceThe ISOMETER® of the IRDH275 series is designed to monitor the insulation resistance ofunearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…650 V. The AMPPlusmeasurement method meets the particular requirements of modern power supplieswhich often include rectifiers, converters, thyristor-controlled DC drives and directly connectedDC components. In these systems often high leakage capacitances against earth occurdue to interference suppression measure.