What is MCB in electrical | Types of MCB

Here you can find out what is MCB in electrical, MCB Components, MCB Working, and type of MCB. We know what is a circuit breaker and there are how many types of circuit breakers.

What is MCB in electrical?


MCB full form Miniature Circuit Breaker. MCB is a type of self-operating electrical switch.

MCB is basically a low voltage circuit breaker. Miniature Circuit Breaker is usually used instead of fuse.

Fuses are currently used in very small quantities. Fuses were used for the protection of each line.
MCB became popular for its various benefits of Miniature Circuit Breaker (MCB) and Miniature Circuit Breaker (MCB) was used instead of fuse.

Once the fuse is broken, it has to be replaced. But Miniature Circuit Breaker (MCB) can be used repeatedly.

Miniature Circuit Breaker (MCB) is used to protect the circuit from overload and short circuits.

Miniature Circuit Breaker (MCB) protects the electrical circuit by MCB trip in case of overload and short circuit and MCB is used by resetting MCB again.

Cannot be reused in case of overload and short circuit infuse. This is the main difference between Miniature Circuit Breaker (MCB) and fuse.

The Miniature Circuit Breaker (MCB) can be used for more days once installed and provides overload and short circuit protection at a relatively low cost.

The output of the Miniature Circuit Breaker (MCB) provides complete protection of the circuit through self-operating in case of any overload and short circuit in the electrical line.

Miniature Circuit Breaker (MCB) can be used in home and industry. Miniature Circuit Breaker (MCB) is currently widely used in home and industry.

Breaker Pole For Miniature Circuit Breaker


1. Single pole MCB: single-pole MCBThis type of circuit breaker has only one wire to control. In a single-pole MCB breaker, one is the wire input and one is the wire output.


The single-phase electrical line is usually used in the house. The phase of the single-phase electric line is controlled by the single pole MCB circuit breaker. Neutral is used directly.


The price of this circuit breaker is relatively low and the circuit breaker is less safe than double pole MCB.


2. Double pole MCB: Two wires can be controlled through double pole MCB. This circuit breaker is commonly used in single-face electric lines. The double pole MCB circuit breaker has two inputs and two outputs.


A double pole MCB circuit breaker is used to give good production in a single-phase line. This circuit breaker is supplied through phase and neutral circuit breaker, it is more secure.


3. 3 poles MCB: He can control it through triple pole MCB. Triple pole MCBcircuit breaker is commonly used in the three-phase lines.


Triple pole MCB Three wires are given at the input of the circuit breaker and power is obtained through three wires at the output. But anyone can use this circuit breaker in a single-phase line.


Neutral is not usually used in the three-phase line. But a 4 pole MCB circuit breaker is used if required.


4. 4 pole MCB: 4 pole MCB circuit breaker can be used to control four wires. 4 pole MCB circuit breaker is used in three-phase four lines.


Where neutral is used with three-phase line 4 pole MCB circuit breaker is used. These circuit breakers are commonly used in industry.


MCB tripping reasons


1. Overload current: If the current of the rated current flows with a certain value of MCB then MCB trip.


Suppose, if a current of 12A amperes flows through an MCB of value 10A then MCB will trip after a certain time.


Bi-Metal thermoelement is used in MCB through which overload works. When more current flows, this Bi-Metal thermoelement heats up and bends towards the MCB trip.


Therefore, the correct quality MCB for a specific ampere is to be used through load calculation.


2. Short current: When a short circuit is created in an electrical circuit through a positive and negative connection, a large amount of current flows through it. This is called a short circuit caused.


This short circuit is organized when phase and neutral merge at the output of MCB or any load at the output of MCB is shorted.


The circuit breaker has a coil that creates a quality magnetic field. When more current flows in the circuit due to a short circuit, more magnetic flux is generated in the coil and this produces a magnetic field.


A circuit breaker trip is done with the help of a magnetic field. This protects the circuit.


3. manual trip: The circuit breaker is turned on and off at any time according to the user's needs. This on-off makes the circuit breaker trip.


MCB Components


1. Cable Terminal

2. Contact

3. Operating Handle

4. Coil Assembly

5. Bi-Metal thermoelement

6. Din Rail Mounting

7. Arc Chamber


MCB Working


When the circuit breaker supplies power then the connection is in 2 Cable Terminal, Contact, Bi-Metal thermoelement, and Coil Assembly series.


When current flows through the terminal, if the rated MPV current flows more, the Bi-Metal thermoelement heats up and overloads the trip by opening the contact.


When a short-circuit occurs in the MCB output, the coil assembly generates magnetic flux and opens the contact by creating more magnetic fields. Which protects the electrical circuit.


MCB basically completes the work this way. Because MCB overload and short circuit are the two protections


Type of MCB


The type of MCB is determined based on two factors: Tripping Current and Operating time.


There are basically 5 types of MCB.

B Type, c Type, D Type, K Type, Z Type


Let's assume that all types of circuit breakers have not complied with 10A. All types of circuit breakers based on 10A will be reported.

types-of-mcb

1. B Type: If 3-5 times current flows through this type of MCB, the circuit breaker will trip in 0.04 -1 seconds.


The circuit breaker will trip if 30-50 ampere current flows for its standard 10-ampere circuit breaker.


If 12A flows through a 10-ampere circuit breaker, it takes 10-20 seconds to make the trip.


B Type circuit breaker is used in registered load. This type of circuit breaker is commonly used in homes.


2. C Type: If 5-10 times current flows through this type of MCB, the circuit breaker will trip in 0.04 -5 seconds.


The circuit breaker will trip if 50-100 ampere current flows for its standard 10-ampere circuit breaker.


C Type circuit breaker inductive and capacitive ludo are used. This circuit breaker is used in homes and for motors.


3. D Type: If 10-30 times the current flows through this type of MCB, the circuit breaker will trip in 0.04 -3 seconds.


The circuit breaker will trip if 100-300 ampere current flows for its standard 10-ampere circuit breaker.


This type of MCB is commonly used in welding machines, X-ray machines, and large motors.


4. K Type: If 8-12 times current flows through this type of MCB, the circuit breaker will trip in less than 0.01 seconds.


The circuit breaker will trip if 80-120 ampere current flows for its standard 10-ampere circuit breaker.


5. Z Type: If 2-3 times current flows through this type of MCB, the circuit breaker will trip in less than 0.01 seconds.


The circuit breaker will trip if 20-30 amps current flows for a 10 amp ampere circuit breaker.


The circuit breaker tips for any type of short circuit and light leakage current. Circuit Breaker High Sensitivity Complete.


Such circuit breakers are electronics circuits or semiconductors and are used where no risks are taken.

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FAQ IN What is MCB in electrical


Q1. How is MCB selected?

Ans: By determining the current rating depending on the load and using 25% more MCB of the current rating.


Q2. What type of high sensitivity MCB?

Ans: Z Type MCB High Sensitivity. This circuit breaker will trip in less than 0.01 seconds if 2-3 times the current flows.


Q3. What are MCB Components?

Ans: Cable Terminal, Contact, Operating Handle, Coil Assembly, etc.


Q4. How many MCB circuit breaker poles?

Ans: There are four types of MCB circuit breaker poles. E.g. 1 pole, 2 poles,3 poles, 4 poles.

If you have any doudts.Please let me know

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