Answer / manas

ELCB-- earth leakeage circuit breker
RCCB-- residual current circuit breaker
MCB -- minuate circuit breaker

ELCB-- for earth leakage protection
RCCB-- residual current protection
MCB-- overload protection

ELCB
when leakage of current from phase to earth occurs than
it operate

RCCB
it operate when there is a difference of current between
two phase.

MCB
it operate when there is a overload occures

practically

RCCB=ELCB+MCB

Answer / venkatesh kumar

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

Answer / ankur saharia

The term ELCB stands for Earth Leakage Circuit breaker .whenever the leakage current from any live part to ground exceeds a particular value, then the trip coil of ELCB operate for further disconnection of the live part. Generally the trip coil of ELCB is connected in between the non- conducting part of any equipment (Insulation part) and ground. The current setting of a ELCB is in the range of 65mA, 30mSec & must be connected for those loads whose rating exceeds 5KW.
The term RCCB stands for Residual Current Circuit Breaker. The connection of RCCB is always followed by CBCT(Core Balance Current Transformer) .this is because the residual current is sensed by only CBCT.For a 3-phase system, under balanced condition, sum of current at all the phase is zero.i.e. Ia +Ib+Ic =0.but when in any phase comes in contact with earth, then the three phase system is no longer in balance.i.e. Ia+Ib+Ic ≠0(or equal to residual current).this current is sensed by CBCT Secondary & when it exceeds the set value, then is operate & remove that faulty part.

Answer / dibya narayan tripathi

simply RCCB=ELCB+MCB
rccb operates when difference in current between two phase & elcb operates when leakage of current between phase and earth.where RCCB is current operating device & ELCB is voltage operating device.

Answer / dibya narayan

simply RCCB =ELCB+MCB
rccb is operated when current difference in any two phase & elcb operates when leakage of current in phase & neutral

Answer / bikash kumar

Difference between ELCB and RCCB
.ELCB is the old name and often refers to voltage operated
devices that are no longer available and it is advised you
replace them if you find one.
•RCCB or RCD is the new name that specifies current
operated (hence the new name to distinguish from voltage
operated).
•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. 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.
•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.

Answer / sel

So elcb and rcd do the same- any imbalances which also can
be to earth then they trip out

Answer / raviraj.c

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.

Answer / raju.b

A few volts difference between Neutral and Earth. It is this potential which is sufficient to cause your RCD / ELCB / RCCB .

The reason for the installation of the non-existent bonds arose from a .rcd or rccb. Can either of these be used on an tt system both 30ma

The Installation is a TT system protected by a 30mA RCD (used as the main .asked for 100amp 100ma rccb controlling first half of split and a double pole .

Answer / sankar

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,

And Second, RCCB is the Residual current circuit breaker
and it detects the any leakage currents directly.

what is balanced network and unbalanced network

1 Answers   Nalco,

How does ELCB work when exist earth foult? and How does RCCB work when exist earth foult?

1 Answers  

a battery is having capacity 100AH and 25% charging .if a load taking 10A & connected 6 hour .what is the final condition of the battery.

0 Answers  

what is looping circuit in electrical lighting circuits?

5 Answers   L&T,

Which type of arc protection devices used.

2 Answers   KSEB, L&T, Siemens,

what the Microsoft .NET framework is?

0 Answers  

what is sloop? what is meen LLB in and difine?

0 Answers  

Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

0 Answers  

What is the permissible maximum flux density in transformer core?

0 Answers  

the question is about buchloz relay why we called it buchloz relay

7 Answers   HIL,

A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

0 Answers   Blue Star,

which fault is severe and why?between lll fault and lllg fault which fault is severe and y?

0 Answers   GE,