7EN02-0477-02

Insulation resistance (R) monitoring

Ungrounded power system require insulation monitoring to generate alarm in case of earth fault.

The installation must either be ungrounded or must be grounded through the specific ZX impedence (Commercial Reference: 50159).

In the event of only one earth fault, the fault current is very low, the system remains ON. However, given that a second fault could potentially cause the circuit breaker to trip, an IMD, IM400, has to be installed to indicate the initial fault. To complement IM400, the IFL12 (Insulation Fault Locator) permanently locate which feeder is faulty. If some feeders are not equipped with IFL12, this Mobile Fault Locator 1 channel (MFLK1) locate the fault. This device triggers an audible and a visual signal.

By constantly monitoring the insulation resistance, you can keep track of the system quality, which is a form of preventive maintenance.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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