The Earth Fault Relay Type RR-EF1 is designed to monitor power system and provides a relay operation when a earth fault current occurs.

It is suitable for protection of all electrical circuit. This relay is extremely accurate, compact and user-friendly in setting and installation.

The RR-EF1 is housed in a DIN standard 96 x 48mm case which is of front panel mounting.

This feature provides major economic and safety benefits, when compared with the traditional DIN rail mounted product. Any required re-adjustment or function checking, can be achieved without the need to access the live side of the panel.

The relay has customer adjustable current input setting from 0 to 2 Amps and an adjustable time delay of 0 to 1 second. A manual push to "TEST" button is provided for checking the relay operation. The status of the relay is always apparent from the front panel.

A Red LED indicates the state of the relay, and a Green LED indicates the state of the auxiliary power supply. The relay is latched so once the earth fault occurs, the relay remains energized, regardless of the condition of the system being monitored.

The relay can be reset via a reset button on the front of the RR-EF1 without breaking the locking seal. A transparent plastic lockable front cover is provided for sealing of the setting knob to ensure that unauthorized personnel cannot tamper with the set point or the time delay of the Earth Fault Relay.