What is an MCB | Do MCB works on magnetic effect of current

MCB works on which effect of current

MCB

 

In this article, let us know in detail What is an MCB  - Miniature Circuit Breaker. On what effect of current does MCB work

 

What is an MCB (Miniature Circuit Breaker)

 

Miniature Circuit Breakers

Have you ever wondered what happens to your home appliances like fans, washing machines, ovens, fridges, and more if there is a short circuit or an overflow of current? If proper circuit breakers are not installed in the equipment, then this equipment burns out and there are incidents of fire. A miniature circuit breaker is a safety accessory that has an electro-mechanical mechanism of action.

 

The MCB automatically returns to normal when the regular flow of current starts. It can be turned off again without any manual replacement. In the case of a fuse, once the fuse is operational, it should be replaced or reconnected depending on the type of MCB. Hence, the fuse is known as one of the sacrificial devices. This is the main reason why MCBs are used as an alternative to fuses in most circuits. Also, whenever there is a fault in the circuit, the switches in the MCB are automatically closed and the fault of the device can be easily detected.

 

The MCB is quite safe to handle and it restores supply quickly. MCB - Miniature Circuit Breaker can be reset quickly and does not demand much maintenance cost. MCB works on a bi-metallic related principle that protects against overload current and solenoid short circuit current.

MCB full form

Miniature Circuit Breakers

Types of MCB 

MCB trip curve decides the type of MCB which is to be used for different types of equipment or equipment. There are 6 types of MCB, they are:

 

a type

B type

c type

d type

K type

Z type

A Type of MCB trips the circuit when the current exceeds 2-3 times the actual current rating. A type of MCB - Miniature Circuit Breaker is highly sensitive to short circuits and hence we can find its application in the manufacturing of semiconductors.

 

B type MCB trips through the circuit when the current exceeds 3-5 times the actual current flow and finds its application in cable protection.

 

C type MCBs trip the circuit when the current exceeds 5-10 times the actual current flow and is used in household as well as commercial equipment such as transformers, fluorescent lighting circuits, IT equipment such as personal computers, servers, and printers. finds the application.

 

The D type MCB trips the circuit when the current exceeds 10-20 times the actual current flow and provides high resistance. It finds its application in motors.

 

K-type MCB can withstand up to 8-12 times the actual current flow and finds its application in heavy-duty load devices such as compressors, winding motors, and X-ray machines.

Application of MCB

MCBs are required for frequent checking and protection of connections in household appliances such as lights, heaters, and fans.