Differences between MCB, MCCB, ELCB, and RCCB
To help you distinguish MCB, MCCB, ELCB and RCCB, Electgo will give you some key differences that may help you have more clear idea about 4 of these Circuit Breaker.
Miniature Circuit Breaker (MCB)
Miniature Circuit Breaker (MCB) automatically puts off an electrical circuit whenever any abnormality occurs in the electrical network such as short circuit and or overload conditions. The MCB is an electromechanical device that protects electric wires, devices, appliances e.t.c from overcurrent so as to prevent any kind of damage, fire, or electrical hazards. MCBs are quite easy and much safer to handle; it also quickly restores the supply of currents.
Molded Case Circuit Breaker (MCCB)
The Molded Case Circuit Breaker (MCCB) is another type of electrical protection device that is used when the load current exceeds the limit of an MCB. The molded case circuit breaker also provides protection against short circuit faults, overloads and it can also be used for switching circuits. It is also used for higher current rating and fault levels in domestic and small commercial applications. But the large current ratings and high breaking capacity of the MCCB are much more useful in industrial applications.
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Residual Current Circuit Breaker (RCCB)
Residual Current Circuit Breaker (RCCB) is basically an electrical wiring device whose function is to disconnect the circuit whenever there is leakage of current flow from the human body, or the current flow is not balanced between the phases conductors. It is the best device for detecting and taking care of electrical leakage currents, so it gives protection against electric shock or electrocution caused by direct contact. RCCB is usually used in series with an MCB. The MCB protects the RCCB from over-current and short-circuits current. Both neutral and phase wires are connected through an RCCB. The combination of these two devices provides a very effective form of protection from electric shock, and it is widely used for protection against a leakage current of about 30,100 and 200mA.
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Earth Leakage Circuit Breaker (ELCB)
Earth Leakage Circuit Breaker (ELCB) has the same function as the residual current circuit breaker, but they are voltage sensor devices. However, the ELCB is old technology, and it’s no more in common use. The RCCB has taken center stage since it a current sensitive device, and it has a better advantage over ELCB.