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Question
can you give main difference between ELCB And RCCB?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
elcb means earth leakage circuit breaker which operates when
there is a leakage of current from phase to earth.
Rccb means residual current circuit breaker which operates
when there is a difference in current between any two
phases.This differential current is called resdual current.
 
Is This Answer Correct ?    286 Yes 60 No
Suresh G
 
Answer
# 2
ELCB is a voltage operated device.RCCB is a current
operated device.IN ELCB, Trip coil is connected between
system ground and non current carrying part of the
machines.RCCB having CBCT(Core Balanced Current
Transformer).CBCT consists of 2nos of primary winding
(P1,P2) and one secondary winding(S1).Primary windings are
in series with the load and secondary winding connected to
Trip coil.In case of healty time, voltage in both the
primary windings will be cancelled and hence no voltage on
secondary winding.During the leakge or If any body touch
the live wires of the machines, current will passing
through the body and connected to ground.It will cause the
voltage difference in primary windings and induced voltage
in secondary operates the trip coil(operating time 50ms).
 
Is This Answer Correct ?    189 Yes 32 No
Sabarikumar R
 
 
 
Answer
# 3
ELCB:-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 passing 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
passing from live to any other earthed body.

RCCB:-A residual current device (RCD), or residual current
circuit breaker (RCCB), is an electrical wiring device that
disconnects a circuit whenever it detects that the electric
current is not balanced between the phase ("hot") conductor
and the neutral conductor. Such an imbalance is sometimes
caused by current leakage through the body of a person who
is grounded and accidentally touching the energized part of
the circuit. A lethal shock can result from these
conditions; RCDs are designed to disconnect quickly enough
to mitigate the harm caused by such shocks.
 
Is This Answer Correct ?    157 Yes 14 No
K.senthilkumar
 
Answer
# 4
ELCB has a protection for earth leakage where as the RCCB
has the dual protection features of ELCB and MCB
 
Is This Answer Correct ?    251 Yes 144 No
Sandy
 
Answer
# 5
ELCB earth leakage circuit breaker
RCCB residual current circuit breaker which operates
when there is a difference in current between any two
phases.This differential current is called resdual current.
 
Is This Answer Correct ?    63 Yes 24 No
Vinod Kumar
 
Answer
# 6
1)
An RCCB will disconnect if there is sufficient fault
current flowing from any part of the protected circuit to
any other path. An ELCB will only disconnect if there is
sufficient fault current flowing from a live part of the
circuit to the protective earth conductor.
2)
ELCBs are old hat.
3)
RCCBs are cool for compliancy purposes ELCBs are not.
4)
RCCBs are pretty good at protecting people against electric
shock. ELCBs are pretty crap.
5)
An RCCB disconnects a circuit when there is a difference
between the current in the phase side of a circuit and the
return side of that circuit and when this difference is
filtered and exceeds a threshold trip current value(In this
context ‘return’ for most purposes is the neutral conductor
but for some installations could also conceivably be
another phase connection).ELCBs work by detecting current
(or valtage induced by current) in the protective earth
conductor.
6)
It is difficult to see why anyone would choose to use an
ELCB over an RCCB given that an ELCB will only prevent the
protective earth conductor from reaching a dangerous
voltage under fault conditions. RCCBs will also do this and
more.
 
Is This Answer Correct ?    35 Yes 1 No
Anc
 
Answer
# 7
rccb:-it measures the difference in current between live
and neautral conductors of a system.in normal conditions it
is equal.If it is diff. than it indicates that some current
is flowing other than live and neutral
Elcb;-it measures the voltage on earth conductor.If this
voltage is not zero that indiacate a leakage to earth
 
Is This Answer Correct ?    51 Yes 21 No
Monti
 
Answer
# 8
elcb means earth leakage circuit breaker which operates when
there is a leakage of current from phase to earth.
Rccb means residual current circuit breaker which operates
when there is a difference in current between any two
phases.This differential current is called resdual current.
 
Is This Answer Correct ?    20 Yes 4 No
Aqeeb
 
Answer
# 9
ELCB:ELCB IS AN EARTH LEAKAGE CIRCUIT BREAKER WHICH CHEAK
THE LEAKAGE OF CURRENT TO THE EARTH AND TRY TO BREAK THE
CIRCUIT POWER.
RCCB:RCCB IS AN RECIDUAL CURRENT CIRCUIT BREAKER WHICH
CHEACK THE ELECTRICAL CURRENT DIFFERENCE BETWEEN TWO PHASES
IT WILL BREAK THE CICUIT POWER
 
Is This Answer Correct ?    40 Yes 25 No
Tulasi Ram.k
 
Answer
# 10
There are 2 types of ELCB ; voltage operated and current
operated. Current operated ELCB is RCCB or sometimes people
call RCD. Voltage operated ELCB have earth wire connect to
ELCB. It is for the ELCB to measure the leakage voltage and
will trip if the leakage voltage reach to dangerous value.
While RCCB (Current operated ELCB) monitor the different in
current between Neutral and Live(or phases). The
differential current is called residual current. RCCB will
trip if residual current reach at certain value depends on
rated RCCB sensitivity.
 
Is This Answer Correct ?    18 Yes 3 No
Bad N
 

 
 
 
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