What is Difference between MCB and MCCB.


Posted On: Feb 22, 2018


    1 Answer Written

  •  devquora
    Answered by Prachi


    One thing that catches our attention except for windows and photo frames on walls are in general the Circuit Boards. Every now and then we come across circuit boards and a run of virtual current fly pass our mind, isn’t it? Here in this article, we are going to discuss Miniature Circuit Breaker and Molded Case Circuit Breaker, both of them have particular relevance in the electrical world. Let us dig deep into both of these and try to differentiate them with the necessary points.

    Miniature Circuit Breaker is a type of switch which disconnects the circuit whenever an abnormal condition arises, the term abnormal conditions refer to the faults occurring in the circuital system or the overload condition which jumps up with or without notice. These devices have become popular and have cemented their place in the electrical industry, initially, fuses were used as a switch but now MCB are the ones ruling the switch forum. Handling MCB is safer when compared to a fuse. These devices are generally rated under 100 amps with an interrupting rating of 1800 amps, a point to consider here is that their trip characteristics are not easy to adjust as they are made for low circuits of low energy requirements.

    As the name suggests MCCB or Molded Case Circuit Breaker is a trip device assembled into a mold, these are meant for high rated currents. MCCBs are made to have a higher capacity than that of MCB. MCCB sometimes comes with a motor-controlled mechanism that allows them to be tripped using remote control hence in some sense it is automated in nature. MCCBs are preferred in industrial and commercial uses over MCB whereas when someone wants to install circuit breaker in home MCB has an upper hand. Major known devices that have a connected MCCB are Welding Machines, Large motors, Protecting Capacitor Banks, etc.

    As we saw both MCB and MCCB are present in the electrical circuit for safety reasons, their presence is of utmost importance.

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