The GWR electronic limit relay is used to monitor alternating or direct current as well as alternating or direct voltage.

The alternating current variables are measured as r.m.s. values regardless of waveform.

The limit values can be set in increments of 1% using code selector switches. The response delay and closed-circuit/open-circuit principle can be selected as options.

The instantaneous switching state of the output relay is indicated via LEDs.