What does MCB mean?
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.
Difference Between MCB and MCCB:-
Most people are confused about the differences between MCB and MCCB. Although both are circuit breakers, there are actually key differences between the two that make them specially made for specific jobs.
However, before we talk about the key features of each, it is important to understand what the abbreviations stand for. “MCB” stands for “Miniature Circuit Breakers”, while “MCCB” is “Molded Case Circuit Breaker.”
The main difference between the two is their capacity, with the MCB rated under 100 amps with an interrupting rating of under 18,000 amps. Consequently, their trip characteristics may not be adjusted since they basically cater to low circuits.
On the other hand, an MCCB comes with an adjustable trip characteristic for the higher models. Usually, this type of circuit breaker would provide amps as high as 2,500 or as low as 10, depending on what is necessary. Their interrupting rating ranges from around 10,000 amps to 200,000 amps.
Judging from their power capacities, the MCB is mainly used for low-energy requirements, like home wiring or small electronic circuits. On the other hand, the MCCB is more suited in providing energy for high-power equipment.
Although an MCCB has a higher capacity than an MCB, both are classified under low voltage circuit breakers and should, therefore, respond to standards set by the IEC 947. For convenience’s sake, some MCCB units have electrical motor operators, which means they can be tripped using only a remote control. For industrial or commercial use, they may be utilized as standby power that runs on an automatic transfer switch.
Both are installed in special niches on the wall that make it easy to install or uninstall without interrupting the whole system or damaging the switchgear. Both are also specially made to handle direct current, and are usually laid out in tiers for space efficiency.
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