ELCB(Earth leakage circuit breaker ) Switchgear

ELCB(Earth leakage circuit breaker) Switch is extensively used for residential and commercial applications. It provide features like Longer functional life, Hassle free performance, Sturdy construction, Less energy consumption etc.

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Detailed Description for ELCB(Earth leakage circuit breaker ) Switchgear



          An Earth-leakage circuit breaker (ELCB) is a safety device used in electrical installations with high Earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment, and interrupts the circuit if a dangerous voltage is detected. Once widely used, more recent installations instead use residual current circuit breakers which instead detect leakage current directly.The main purpose of Earth leakage protectors is to prevent injury to humans and animals due to electric shock.



There are two types of ELCB:

* voltage operated

* current operated.





ELCBs 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 the cable circuit protective conductor, an ELCB can be arranged to protect against cable damage only, and not trip on faults in downline installations.



ELCBs have some disadvantages:

* They do not detect faults that don't pass current through the CPC to the Earth rod.

* They do not allow a single building system to be easily split into multiple sections with independent fault protection, because Earthing systems are usually bonded to pipework.

* They may be tripped by external voltages from something connected to the Earthing system such as metal pipes, a TN-S Earth or a TN-C-S combined neutral and Earth.

* As with RCDs, electrically leaky appliances such as some water heaters, washing machines and cookers may cause the ELCB to trip.

* ELCBs introduce additional resistance and an additional point of failure into the Earthing system.



* Longer functional life

* Hassle free performance

* Sturdy construction

* Less energy consumption

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