BLOGS

A Molded Case Circuit Breaker (MCCB) is a useful device for preventing electrical accidents and protecting electrical appliances from sudden voltage fluctuations. Widely used in commercial and industrial setups, an MCCB is extremely useful for protecting heavy-duty electric circuits. But do you know how an MCCB works or is it the same as MCB? What are the advantages of using an MCCB? To know answers to these questions, keep reading:

As one of the leading MCCB manufacturers, we share with you 8 important things that you should know about an MCCB:

• The working of an MCCB: The MCCB has a thermal element with a current sensitive electromagnetic device. When an MCCB detects electrical abnormalities such as overloading or short circuit, the device isolates the faulty circuit and trips.


• Modern MCCBs come with 2 kinds of release: Latest MCCBs come with thermal-magnetic and microprocessor release.


• An MCCB is a sophisticated version of MCB: The workings of MCCBs and Miniature Circuit Breakers (MCBs) are quite similar but they are different.
  • The current rating of an MCB is 100 amperes, while an MCCB has a current rating of between 10 to 200 amperes.
  • An MCCB comes with an interrupt rating between 10k to 200k amperes, whereas the interrupt rating of an MCB is up to 1800 amperes. This makes the MCCB suitable for commercial and industrial use while the MCB is suitable for residential use for home appliance protection.
  • An MCB contains a fixed tripping circuit, whereas an MCCB has a movable tripping circuit.
  • Unlike an MCB, an MCCB can be remotely operated.


• Components of an MCCB: Some of the important components of an MCCB are
  • Operating mechanism
  • Arc Extinguisher
  • Trip Unit


• Variants of MCCBs: MCCBs are available in 2,3, and 4 pole variants. These poles are hot wire markers across the neutral line, which disconnects the circuit when electrical faults occur.


• Different gear shifts: Depending on their operating current rate and response time, MCCB gear shifts are available in five different types - Type B, Type C, Type D, Type K, and Type Z. Each has a different response time.


• MCCBs are low maintenance: MCCBs do not require much maintenance and unlike traditional fuses, MCCBs need not be replaced frequently.


• Selection of an MCCB: MCCB manufacturers provide technical specifications for every circuit breaker model. To buy an MCCB, you must keep the following factors into consideration:
  • Rated Frame Current (Inm)
  • Rated Current (In)
  • Rated insulation voltage (Ui)
  • Rated working voltage (Ue)
  • Operating short-circuit breaking capacity (Ics)
  • Ultimate short-circuit breaking capacity (Icu)

Looking for an MCCB manufacturer?

As one of the leading MCCB manufacturers, we offer a wide range of circuit protection devices that are manufactured as per the highest standards of quality and safety. Our protection devices such as MCCB, MCB and electrical isolators offer optimal protection in case of electrical faults.