ISOMETER® IR420-D6

Insulation monitoring device for de-energised loads
Application in TN, TT or IT systems
According to IEC 61557-8
Two separately configurable response values
Multi-functional LC display

The offline monitor of the IR420-D6 series is designed to monitor the insulation resistance of loads in the de-energized state. These loads, usually temporarily operated or de-energized most of the time, e.g. fire extinguisher pumps, slide valve drives etc are supplied from solidly grounded or ungrounded systems. During the shut-down periods, however, humidity or other effects may cause insulation faults in the wiring or the loads which may go undetected. Switching the device on may then lead to the tripping of the protective device or may even result in motor fires and the device cannot be operated. In combination with a coupling device, the Isometers can also be used for higher voltages.

Questions? Contact us!

Insulation monitoring device for de-energised loads
Application in TN, TT or IT systems
According to IEC 61557-8
Two separately configurable response values
Multi-functional LC display

The offline monitor of the IR420-D6 series is designed to monitor the insulation resistance of loads in the de-energized state. These loads, usually temporarily operated or de-energized most of the time, e.g. fire extinguisher pumps, slide valve drives etc are supplied from solidly grounded or ungrounded systems. During the shut-down periods, however, humidity or other effects may cause insulation faults in the wiring or the loads which may go undetected. Switching the device on may then lead to the tripping of the protective device or may even result in motor fires and the device cannot be operated. In combination with a coupling device, the Isometers can also be used for higher voltages.

Questions? Contact us!

Features

Isulation monitoring for de-energised solidly grounded and unearthed systems AC, 3(N)AC and DC
Nominal voltage extendable via coupling device
Two separately adjustable response values 100 kΩ…10 MΩ
LEDs: Power On LED, LEDs Alarm 1, Alarm 2 for signalling insulation faults

Combined test/reset button
Two separate alarm relays with one changeover contact each
Fault memory behaviour, selectable
Push-wire terminal (two terminals per connection)

Applications

De-energized loads such as automatic fire extinguisher pumps, emergency drives, ship cranes, slide-valve drives in supply lines (gas, water, oil), motor-driven closing systems, diving pumps, drives for anchors, elevators, flue-gas valves and stand-by generators.