IR420-D4 Overview
The A-ISOMETER® IR420-D4 monitors for ground faults in ungrounded AC systems from 0 to 300 V by measuring the system's insulation resistance. The IR420-D4 is designed to provide predictive maintenence and detect ground faults in ungrounded systems before leakage current may even be present. An external supply voltage is required to power the device.
IR420-D4 Key Features
- Insulation monitoring for ungrounded, low-voltage circuits AC 0…300 V
- Two separately adjustable response values
- Preset function (automatic assignment of basic parameters)
- Connection monitoring
- LEDs: Power On, Alarm 1, Alarm 2
- Internal/external test/reset button
- Two separately adjustable SPDT contacts
- Normally energized or normally de-ener- gized operation
- Latching or non-latching behavior
- Detailed LCD display