7EN02-0423-00

Example application: Ungrounded power system insulation monitoring and the insulation fault location is sent to a supervisor

You can use an IMD and insulation fault locator to monitor an ungrounded power system and send the alarm to a supervisor.

An ungrounded power system is a system involving the use of a transformer whose neutral is not connected to ground.

The insulation is monitored by an IMD whose insulation alarm and preventive insulation alarm outputs are connected to an available input on a networked device (For example: PLC). This device is connected to a supervisor via a communication network.

Locating the insulation fault is done using XD301, XD312 or IFL devices. The XD301, XD312, or IFL* output relay is connected to an available input on a networked device.

The XRM mobile insulation fault locator is used to locate accurately the area where the insulation fault has occurred.

NOTE: In this scenario, only the insulation alarm, preventive insulation alarm, and faulty channel information are available to the supervisor.
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