Moulded Case Circuit Breaker Categories You Must Know

The full form of MCCB in electrical is moulded case circuit breaker. MCCB is an automatic electrical device that is designed in a way to protect the electrical equipment from any overload, short circuit, or instantaneous over electric current and earth fault. It is a much-advanced version of MCB (Miniature circuit breaker). Its availability is from 32 Amps to 1600 Amps with a voltage range of 230V to 1.1kV.

The main benefit of MCCB (Moulded case circuit breaker) is that we can make use of it as per our needs. We can install it with new future such as remote closing, UV trip, etc. It acts as the best replacement for an air circuit breaker that to in every aspect whether it is cost or functioning. In the molded case circuit breaker, you can even adjust the current setting as well as the time setting. Moulded Case Circuit BreakerManufacturer are easily available and from them, you can get this breaker.

Construction:

• MCCB has 9 different parts such
• CT – Current Transformer assembly
• Moving Contact
• Arc chute
• Base cover
• Overload trip or Bimetallic contact
• Handle knob
• Terminal Connector
• Operating mechanism
• Manual trip button

Different Types of MCCB

The MCCB is divided into six categories based on the tripping types.

Type B: They operate till the fault current reaches 3 to 5 times the full load current. Its main use is in domestic applications such as resistive load, lighting loads, etc. 0.04 to 15 seconds is the available operating time of this beaker.

Type C: Type C breakers are mainly used for inductive loads, such as welding machines, electromagnets, transformers, etc. Its operating range is 5 to 8 times the full load current along with a time delay of 0.04 to 5 seconds.

Type D: It is quite suitable for heavy starting current applications such as motors, pumps, lifts, etc. Its operating range is 10 to 15 times with a time duration of 0.04 to 3 seconds

Type K: It starts operating when the current goes to 8 to 10 times its full load current. 0.04 to 5 Seconds is the operating time for type K MCCB. They are considered the best suitable feeder protection.

Type Z: Type Z MCCB Circuit Breaker is quite sensitive and they allow 1.5 to 3 times the full load current. Type Z is very much suitable for electronics load.

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