The AAL-2 from DEIF is an insulation monitor and is used to supervise insulation resistance between an isolated AC voltage distribution network and an earth/safety cable.
The insulation monitor, AAL-2 from DEIF, is applicable with single-phase and 3-phase networks with/without neutral for voltages up to 440 V AC.
The AAL-2 has a built-in relay output and an adjustable warning set point.