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What is difference between earth leakage relay and
restricted earth fault relay ?
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Answer Posted / rahul
EARTH LEAKAGE RELAY IS USED FOR DETECTION OF EARTH LEAKAGE
WHICH WORKS ON THE PRINCIPLE OF SENSING THE CURRENT FLOWING
THROGH THE LIVE WIRE. A SIMPLE COMPARATOR CAN BE USED WHERE
ONE INPUT OF THE COMPARATOR IS FED IN WITH SOME CALCULATED
REFERRENCE VOLTAGE AND THE SECOND INPUT OF THE SAME
COMPARATOR IS CONNECTED TO THE LIVE LINE, WHICH ON THE
OCCURENCE OF EARTH FAULTS, WILL DELIVER HIGH VOLTAGE
(GREATER THAN THE REFERRENCE VOLTAGE)AND HENCE, O/P OF
COMPARATOR BECOMES HIGH-LOGIC.....WHICH FURTHER CAN BE USED
FOR TRIPPING THE I/P POWER NY APPLYING SOME TRANSISTOR
BIASING LOGIC OR BY APPLYING SOME CONTROLLER-LOGIC.....
NOTE:- IT IS NOT USED TO MONITOR THE CURRENT AT NEUTRAL
LINE.....
WELL, THIS IS 100% CORRECT AND I KNOW ABT EARTH LEAKAGE
RELAY ONLY, I DON KNOW ABT THE OTHER TYPE.
| Is This Answer Correct ? | 6 Yes | 19 No |
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