We are one of the leading ELCBs or Earth Leakage Circuit Breaker manufacturer, supplier and exporters in India.
Advantages of ELCB over RCD
ELCBs or Earth Leakage Circuit Breaker have one advantage over RCDs: they are less sensitive to fault conditions, and therefore have fewer nuisance trips. (This does not mean they always do, as practical performance depends on installation details and the discrimination enhancing filtering in the ELCB.) Therefore by electrically separating cable armour from cable CPC, an ELCB can be arranged to protect against cable damage only
Connection
The earth circuit is modified when an ELCB is used; the connection to the earth rod is passed through the ELCB by connecting to its two earth terminals. One terminal goes to the installation earth CPC (circuit protective conductor, aka earth wire), and the other to the earth rod (or sometimes other type of earth connection). Thus the earth circuit passes through the ELCB's sense coil.
ELCB Operation
An ELCB is a specialised type of latching relay that has a building's incoming mains power connected through its switching contacts so that the ELCB disconnects the power in an earth leakage (unsafe) condition.
The ELCB detects fault currents from live (hot) to the earth (ground) wire within the installation it protects. If sufficient voltage appears across the ELCB's sense coil, it will switch off the power, and remain off until manually reset. An ELCB however, does not sense fault currents from live to any other earthed body.
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