Earth continuity relays prefixed gcm.
Earth continuity relay function.
It drives the hmi display interface edm and is also in control of the main circuit breaker.
This allows non flameproof switches to be used in hazardous areas.
A typical example is a pump float switch.
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.
The pilot conductor is connected through an ep041 barrier into the hazardous zone.
Rather earth continuity protection functions by establishing a loop current through the pilot core returning through the cable earth.
The loop resistance is constantly indicated on a 7 segment lcd display.
It performs the as nzs 2081 2011 earth continuity protection function on the outlet as well as receive and process the signals from the power interface.
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.
It has configurable parameters event data logging and selectable start stop functionality.
The ecm2 earth continuity relay performs the following functions.
The relay is normally installed in a substation or flameproof enclosure to provide earth continuity protection.
In fact if the motor was running it would become impossible to stop it using the pilot switch.
The relay monitors the return path resistance between pilot and earth of the cable.
When short circuit between the pilot and earth cores in the trailing cable completes the circuit through the operating relay and if the pilot circuit were not to fail to safety such a fault would cause the motor to start immediately.
The method used is called pilot earth loop or earth continuity.
Earth leakage and earth continuity as well as pump and fan protection.
The ecm r earth continuity relay has been designed to monitor the earth continuity of trailing and reeling cables supplying power to mobile machines on an earth fault limited system where there is not a requirement to comply with as2081 2.
Ensures that there is an earth return path from the machine back to the substation and or distribution box.
An earth continuity relay is designed to provide earth continuity protection.
Our latest offering the pf1 relay performs two standard electrical protection functions.
