IR425

Digital ground fault detector for ungrounded single-phase AC and DC systems up to 300 V

Description

This device meets or exceeds the requirements of NEC 250.21(B) and CEC 10-106(2) for ground detectors in ungrounded AC systems, as well as the upcoming 2014 requirement of NEC 250.167(A) for ungrounded DC systems.

The IR425 monitors for ground faults in ungrounded single-phase AC and DC systems up to 300 V by measuring the system's insulation resistance. A response value may be set in the range of 1 kΩ to 200 kΩ. The IR425 also works on pure DC systems, and systems utilizing variable frequency drives (VFDs). The digital display shows the read insulation resistance in real time. All settings are also changed from the digital display. Two separate SPDT contact outputs may be set to normally energized or normally deenergized operation.

The IR420-D4 utilizes an external supply voltage for power, which allows deenergized systems to also be monitored.

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