The RUT-2 (DC) relay is meant for use in power installations of DC as a voltage monitoring element with four independent operating relays having programmable parameters (operating threshold, time delay, hysteresis, operating mode of the relays and the filter).

The RUT-2 relay has isolated measuring inputs meant for connecting to the monitored DC voltage circuits. Each of the four voltage detectors (two under-voltage, and two over-voltage) has an attributed separate operating relay, contact of which is led out to the plug of the relay. The alarm levels of the first and second degree are defined by action thresholds input to the memory of the relay. Additional input of a blockade enables blocking the relays operation.