For AC and DC systems Type B To detect earth faults in grounded voltage systems 4 setting ranges from 10 mA to 3 A Manual reset, with alarm and pre-warning With adjustable switching delay Energized or de-energized on trip LED indicator for operation, pre-alarm and alarm With test function LED-chain indicates fault current As option with analogue output Broken wire detection Width: 52.5 mm Application The residual current monitor type B is designed to monitor DC systems and AC systems up to 250 Hz.