Earth leakage relays [ ELR ] are specialised latching relays that are used to #monitor the leakage of current to earth on 3-phase electrical systems, interrupting the circuit in the event that a dangerous voltage leak is detected.

Delab DP-10 Catalog ( Manual ) :- https://drive.google.com/file/d/1JHJp...

PFR Explain :-   • Phase Failure Relay Explain in Sinhal...  
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