The A-Isometer IRDH265-4 monitor the insulation resistance of IT 3(N)AC, AC/DC system. The AC system may include extensive DC-supplied loads. The devices automatically adjust to the system leakage capacitance.

The A-Isometer IRDH265-4 is fitted into a standard plastic casing suitable for DIN rail mounting according to DIN EN 50022 or for screw mounting.

The A-ISOMETER IRDH265-4 are connected between the unearth system and the equipotential bonding conductor (PE).

The setting of the response values and other parameters can be carried out via the function keys. The parameters are indicated on the LC display and are stored in a non-volatile memory after setting.