Answer / sakkaravarthi soganur arakonam

ELCB means earth leakege circuit breaker,
RCD means residuals current device

Answer / k.venkateshwarlu.

ELCB and RCD,Both are working pricipal is same Difference
between the amount of current in the hot side and the
neutral side.RCDs are typically built into a wall outlet
and are reuired for Wet aras Like Kitchen and Bathrooms.

Answer / pankaj chavan

Rcd working on current sensing & elcb is working on voltage
sensing.This is the main difference.

Answer / shahid parvez

ELCB stands for “Earth Leakage Circuit Breaker” and it is used for protecting a person from electric shock and injury. The needs of these devices arise because of the number increasing in injuries as well as deaths because of electric shock. This device is invented almost 50 years ago, but nowadays ELCB is not suitable because of its some disadvantages hence another device RCB (Residual circuit breaker) or RCD (Residual Current Devices) whose functionality is same with more advantages, but theory of operation is entirely different from ELCB.
Residual Current Breaker (RCB) works on the assumption that the current going to the electronics device must come out from the neutral wire, if there is no other way for current flow. In simple words, RCB measures the current going inside the connected device and coming out from the device. If both of these current are equal, then there would no problem with the normal functionality of the device.

This device is also known as Current Operated ELCB.

This device is more sensitive and accurate than ELCB and its functionality does not (entirely) depend on the earthed rode wire connection like voltage ELCB.• 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 / shahid

elcb can not detect the current fault but rcd detect the
current fault

Answer / achita rao

ELCB DECETS EARTH FAULT WHERE AS RCCB DECETS EARTH LEAKEAGE
& SHORT CIRCUIT

Answer / mansoor

both are same in eighties we used to call this device ELCB
now renamed to RCD

What is P.F? Formula for calculating PF in HT side?

1 Answers  

Define transfer function?

0 Answers  

domine+aptitude test means?

2 Answers  

What is the difference between synchronous motor & asynchronous motor

2 Answers  

two TG running in parallel at equal load.one TG CB tripped in reverse power relay.after tripping found its excitation was on & turbine running at rated speed.Please clearify why that TG tripped in reverse power ?

1 Answers   Bhel, Birla,

What are the different methods of improving power factor,especially in Wind Sector

2 Answers   Suzlon,

what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1 Answers  

what is the mager value of star motor and delta motor between phase to ground and phase to phase, and minimum how much should be value ?

1 Answers  

What is C.T, why it is used and what care should be taken for that while connecting?

20 Answers   Bhushan Power Steel,

explain the types of drives

0 Answers  

We have two 1 phase heating coils having same resistance of 25ohm, but during operation one takes 3A and other 6A Is it posiible Pls. explain

5 Answers   Bhel,

how works inductive &capacitive sensors?

0 Answers