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IRDH375_D00124_05_M_XXEN/01.2020
3. Function
3.1 Common characteristics (IRDH375 and IRDH375B)
ISOMETER® for IT AC systems with galvanically connected rectifiers
and for IT DC systems (IT = unearthed systems)
The operating range of the nominal voltage U
n
can be extended via
coupling devices.
Automatic adaptation to the existing system leakage capacitance
measuring principle (European Patent: EP 0 654 673 B1)
Two separately adjustable ranges of the response value1 kΩ …10 MΩ
(Alarm 1, Alarm 2)
Two-line LC display
Connection monitoring (monitoring of the measuring leads)
Automatic device self test
Option "W":
This option provides: improved shock and vibration resistance for use
in ships, on rolling stock and in seismic environment.
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