Rated current up to 10, A. Trip characteristics often fully adjustable including configurable trip thresholds and delays. Usually electronically controlled—some models are microprocessor controlled. Often used for main power distribution in large industrial plant, where the breakers are arranged in draw-out enclosures for ease of maintenance. Vacuum Circuit Breaker With rated current up to A, These breakers interrupt the arc in a vacuum bottle. These can also be applied at up to 35, V.
|Published (Last):||23 December 2004|
|PDF File Size:||7.35 Mb|
|ePub File Size:||4.7 Mb|
|Price:||Free* [*Free Regsitration Required]|
The new RCCB is best because it will detect any earth fault. The voltage type only detects earth faults that flow back through the main earth wire so this is why they stopped being used. The easy way to tell an old voltage operated trip is to look for the main earth wire connected through it.
RCCB will only have the line and neutral connections. ELCB is working based on Earth leakage current. But RCCB is not having sensing or connectivity of Earth, because fundamentally Phase current is equal to the neutral current in single phase. Both the neutral and phase currents are different that means current is flowing through the Earth.
Finally both are working for same, but the thing is connectivity is difference. RCD does not necessarily require an earth connection itself it monitors only the live and neutral. In addition it detects current flows to earth even in equipment without an earth of its own.
This means that an RCD will continue to give shock protection in equipment that has a faulty earth. It is these properties that have made the RCD more popular than its rivals.
For example, earth-leakage circuit breakers ELCBs were widely used about ten years ago. These devices measured the voltage on the earth conductor; if this voltage was not zero this indicated a current leakage to earth. The problem is that ELCBs need a sound earth connection, as does the equipment it protects. As a result, the use of ELCBs is no longer recommended.
And also which is the major distinguish between them? Waiting for your reply.
Low-voltage Power Distribution Products - Low-voltage Circuit Breakers Dimensions/CAD
Earth Leakage Circuit Breakers
RESIDUAL CURRENT CIRCUIT BREAKER
Earth Leakage Circuit Breakers (ELCB)