Digital ground fault detector for ungrounded solar arrays up to 100 kW


This device meets or exceeds the requirements of NEC 690.35 and CEC 64-018(1)(e) for ground fault detection on ungrounded solar arrays.

Designed specifically for photovoltaic systems 100 kW and below, the isoPV425 ground fault detector provides early indication of ground faults before leakage current may even be present. The device detects both AC and DC ground faults by monitoring the system's insulation resistance. The isoPV425 and AGH420 can connect to systems up to 690 VAC / 1000 VDC.

Insulation resistance values are displayed in real-time on the device's LCD display. Additional overvoltage and undervoltage detection are available, with voltage measurements from positive to ground and negative to ground when connected to DC. Two single pole contacts are available, which may be set to normally energized (failsafe) or normally deenergized (non-failsafe) mode. An RS-485 interface is available for connection to remote BENDER communication gateways. For advanced users, separately adjustable values for resistance and impedance are available as well.

The isoPV425 may also be used for determining PV system isolation prior to startup on both grounded and ungrounded solar arrays, per the upcoming 2014 requirements of NEC 690.5(A)(1) and NEC 690.35(C)(1).

Key Features
Technical Data
Ordering Information