Earth Continuity Relay Function

The relay can also as be used as a standard on off control connected to two wires or connected to a pilot and earth of a cable.

Earth continuity relay function.

The trip level can be set using the rotary switches on the front panel. This relay is micro processor controlled and can withstand high induced ac voltages and injected dc voltages. In fact if the motor was running it would become impossible to stop it using the pilot switch. This allows non flameproof switches to be used in hazardous areas.

Earth leakage and earth continuity as well as pump and fan protection. Our latest offering the pf1 relay performs two standard electrical protection functions. It has configurable parameters event data logging and selectable start stop functionality. The relay monitors the return path resistance between pilot and earth of the cable.

The relay is normally installed in a substation or flameproof enclosure to provide earth continuity protection. The loop resistance is constantly indicated on a 7 segment lcd display. The pilot conductor is connected through an ep041 barrier into the hazardous zone. Earth continuity relays prefixed gcm.

This is typically achieved using an earth continuity protection relay to apply a low voltage dc signal between the pilot and earth of the cable. It drives the hmi display interface edm and is also in control of the main circuit breaker. An earth continuity relay is designed to provide earth continuity protection. The method used is called pilot earth loop or earth continuity monitoring where an additional core pilot cable is included with the power and earth cores in the trailing or reeling cables which supply power to the machines.

The method used is called pilot earth loop or earth continuity. Rather earth continuity protection functions by establishing a loop current through the pilot core returning through the cable earth. A typical example is a pump float switch. The ecm2 earth continuity relay performs the following functions.

Ensures that there is an earth return path from the machine back to the substation and or distribution box.