Answer / guest

ELCB is basically voltage operated tripping mechanism.When a
voltage exists between the earth and frame the tripping coil
is activated.If the earth connection is bad the tripping coil
will not operate.
RCCB is an improvement of the voltage operated tripping
mechanism.This is current operated. If the leakage current is
of the designed minimum amount the tripping mechanism is
activated.So if the earthing connection to the ground is bad
but the leakage occurred through a person to the ground the
RCCB will still trip.

Answer / prabhu

elcb means-earth leakage circuit breaker
rccb-residual current circuit breaker

Answer / simon

elcb means-Earth Leakage Circuit Breaker
rccb-Residual Current Circuit Breaker

BOTH R TWO FACES OF A COIN.

Answer / omprakash sahu

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. That’s why RCCB can trip when the both
currents are deferent and it withstand up to both the
currents are same. 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.

Answer / bhushan

Both are same

can u tell the difference between star-star transformer and delta to delta transformer.

3 Answers   Videocon,

1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

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how to select power and control contactor .

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the need of star to delta anddelta to star

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