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

which network topology offers the greatest level of tolerance?

0 Answers  

Why indian power system in 11kv,22kv,33kv,66kv,110kv,220kv ? 2) Why ups required dedicated earth?

8 Answers   Energia, L&T, Sail,

Technical specification of a wind farm

1 Answers  

i need mat lab program to find out the transmission line losses,regulation and losses

0 Answers   AITM,

What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.

0 Answers   TATA,

In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

0 Answers  

Anybody now how to claculate the Bescom power consumption?

1 Answers  

what is the function of RMU?

4 Answers  

HT motors are generally connected in star, what will be the effect if we connect HT motor in Delta?

6 Answers   Equate, Ion Exchange,

what is mean by hormonics & surge? and it's effects?

1 Answers   TCS,

How to determine the Power factor is Leading,Lagging & Unity ?.I don'thave any Meters.

3 Answers  

what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

0 Answers