What is MCB How it works and Types Of MCB

What is MCB 

MCB Full Name - Miniature Circuit Breakers.

You must have heard about Fuses and the Fuses we use to protect our equipment in overload and Faulty Condition. But in today's time we have started using MCB instead of Fuses because it works better than fuse. Whether it is an overload situation or if there is a problem in our equipment, MCB works much better than the fuse.

What is MCB ?

 The MCB is an electrical switch that also acts like a fuse. When the current is high in a circuit, the MCB automatically shuts down. And today MCB is used instead of almost everywhere. We can restart it a little later when the MCB is shut down due to overload, but we have to replace the fuse which takes time, which is why the fuse is promoted to the MCB. So in this post, today we are going to give you complete information about Mcb Connection In Hindi Mcb Working In Hindi.

MCB Design

If you have ever opened the MCB, then you will know about the components inside it, but you probably do not know the names and functions of all of them. The names of all the constituents and their work are described.

MCB Design

To make an MCB, many things are put inside it, as you can see in the photo above, inside which B, how many different types of things are you getting to see, all these work is different, about which I will tell you how to do this work. Below you are given a list of all these components.

1. Operating knob
2. Operating mechanism
3. Bi-Metallic Strip
4. Supply Terminal And Load Terminal
5. Fixed Contact
6. Plunger
7. Magnetic element
8. Arc chamber

On joining all these, a complete MCB works, then below, you have been told how to work and how it is a Trip. And why.

MCB Working 

Seeing in the photo above, you must have understood what happens inside this MCB. Below you have been shown another diagram, with the help of which we will be able to understand it more easily.

MCB Working

There are two types of tripping inside the MCB. As we said, due to MCB over load current and short circuit. But for these two trips, two different things have been installed in the MCB. So first we will talk about how MCB will trip when under load.

Over Load Current Tripping

The MCB has a Bimetal Strip that is made by mixing two metals, one of which spreads less than the other when heated. For this reason, when the current on the MCB increases, this Bimetal Strip starts heating up and due to which a metal in it spreads less. And the other metal spreads more, due to which it becomes bent. And along with the turn, Tripping pulls Lever with him, causing MCB to trip.

Short Circuit Tripping

MCB is typed even after fault in any device, even if that device is shorted from inside, MCB is tripped. The reason for this is the solenoid coil inside it. When there is a short circuit, the solenoid coil in the MCB creates a lot of magnetic field and it pushes the plunger inside it so that the tripping lever also moves forward And our MCB goes on trip.

Now you have come to know how MCB overload and short circuit works. The biggest advantage of using MCB is at the time of short circuit, it trips very quickly in a few milliseconds, due to which we can avoid loss.

• What is RCCB ( Residual Current Circuit Breaker ) and types Of RCCB ?

Types Of Miniature Circuit Breakers 

As we all know MCB is used at the domestic and industrial level, so it is made in different types, there are mainly five types. The list of which is given below. To know all of these, we will use an example for which we will have the Full Load Current or Rated Current 10 Amp of MCB. Will assume

Type - B

If the full load current of an MCB is 10 amperes and it is a Type-B MCB, then if there is 30 to 50 amperes current flow inside it, then that MCB will be tripped.

Type - C

And similarly if TYPE-C has MCB and its full load current is 10 amperes, then it will be trip when 50 to 100 ampere current flows.

Type - D

And similarly if TYPE-D has MCB and its full load current is 10 amperes then it will be trip when 100 to 200 ampere current flows.

Type - K

And similarly, if TYPE-K has MCB and its full load current is 10 amperes, it will be trip when 100 to 150 ampere current flows.

Type - Z

And similarly if TYPE-C has MCB and its full load current is 10 amperes, then it will be trip when 20 to 30 ampere current flows.

Benefits of applying MCB

• MCB is an automatically switched off circuit that automatically switches off due to overload current and short circuit in the circuit. And it works much faster than the fuse.
• We can run the MCB again after the trip, but if the fuse burns, then it has to be replaced by a new fuse.
• If our MCB is repeatedly tripped, we can use it again, but if the fuse is used in its place then it will have to be replaced again and again, which takes a lot of time and it costs money again and again.
• The use of MCB is much safer than fuse.

What is RCCB ( Residual Current Circuit Breaker ) and types Of RCCB ?

In this post, you have tried to give complete information about What Is Mcb,Construction of MCB Design Of MCb and Mcb Working If apart from this you have any question or suggestion, then comment below and ask...

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