How many types of circuit breaker

If we want to gain a good knowledge of circuit breakers, we have to know the types of circuit breakerslow voltage circuit breaker, medium voltage circuit breaker, high voltage circuit breaker, etc.
Earlier we learned what is a circuit breaker and how it works.

How many types of circuit breakers?


There are basically four types of circuit breakers.

1. According to their quenching

2. According to their Circuit Breaker Installation

3. According to the operating mechanism of circuit breaker

4. According to the Voltage circuit breaker level


1. According to their quenching


We know that a circuit breaker has two main parts, a fixed contact and moving contact.

When the moving contact repeatedly connects with the fixed contact and disconnects, a kind of spark is created in that place. This spark is called quenching.

This spark of a circuit breaker is likely to cause a fire. So measures have to be taken to turn off this spark of the circuit breaker. So that this spark does not spread.

Three types of circuit breakers are commonly used to prevent this quenching.

a. Air Circuit Breaker ( ACB )

b. Vacuum Circuit Breaker( VCB )

c. Sulphur Hexafluoride Circuit Breaker ( SF6 )


Apart from this, another type of circuit breaker is used Oil Circuit Breaker (OCB). Oil Circuit Breaker (OCB) This circuit breaker is not currently commonly used.


Because oil is used in this circuit breaker. If there is any problem with the circuit breaker, there is a possibility of a fire in the oil.


This type of spark is usually seen on the HT line in circuit breakers.


2. According to their Circuit Breaker Installation


Not all circuit breakers can be installed everywhere. Specific circuit breakers have to be installed at specific locations.


Not all circuit breakers can be installed as it rains in open space. If installed, various types of accidents can occur.


There are two types of circuit breakers based on circuit breakers.


A. Indoor circuit breaker

All circuit breakers are placed in a confined space or room. These circuit breakers are called indoor circuit breakers.


Such circuit breakers are usually installed for LT lines and some uses of HT lines. For example: MCB, MCCB, MPCB, ACB etc.


B. Outdoor circuit breaker

Circuit breakers that are installed in open spaces are called outdoor circuit breakers.


This type of circuit breaker is usually used on HT lines or sub-stations. Such as ACB, VCB, SF6, etc.


3. According to the operating mechanism of circuit breaker


The mechanism by which a circuit breaker is turned on and off in a circuit breaker is called the operating mechanism.

There are three types of operating mechanisms for this circuit breaker.


A. Spring circuit breaker

Circuit breakers that are commonly used in the industry are screen breaker circuit type circuit breakers.


Almost all circuit breakers that are used below 11KV, 33KV are spring type.


B. Numerical circuit breaker

A circuit breaker that is operated by air is called a numerical type circuit breaker.


C. Hydraulic circuit breaker

A circuit breaker that operates on a hydraulic mechanism is called a hydraulic circuit breaker.


4. According to the Voltage circuit breaker level


Circuit breakers are determined for installation depending on the voltage. There are three types of circuit breakers depending on the voltage.


A. Low voltage circuit breaker

Circuit breakers that operate at low voltage are called low voltage circuit breakers. Such as: MCB, ELCB, RCCB, MCCB, MPCB, ACB etc.


a. Miniature Circuit Breaker( MCB )

B. Electric Leakage Circuit Breaker ( ELCB )

C . Residual Current Circuit Breaker ( RCCB )

D . Moulded Case Circuit Breaker ( MCCB )

E. Motor Protection Circuit Breaker ( MPCB )

F. Air Circuit Breaker ( ACB )

G. Residual current circuit breaker (RCBO )

How-many-types-of-circuit-breaker

Electric Leakage Circuit Breaker (ELCB) Circuit Breaker is now replaced by Residual Current Circuit Breaker (RCCB). ELCB's Update Circuit Breaker RCCB.


In other words,

Circuit breakers that are used at voltages below 1000V are called low voltage circuit breakers.


B. Medium voltage circuit breaker

Circuit breakers through which medium quality voltage is operated are called medium voltage circuit breakers. Such as:


a. Air Circuit Breaker ( ACB )

b. Vacuum Circuit Breaker( VCB ) or medium voltage vacuum circuit breaker

c. Sulphur Hexafluoride Circuit Breaker ( SF6 )


In other words,

Circuit breakers that operate with 1000V - 72000V voltage are all circuit breakers. Medium voltage circuit breakers.


C. high voltage circuit breaker types or hv circuit breaker


Circuit breakers that operate at high voltage are called high voltage circuit breakers.


a . Sulphur Hexafluoride Circuit Breaker ( SF6 )

b . Vacuum Circuit Breaker ( VCB )

c.  Air Circuit Breaker ( ACB ) /  Air Blast Circuit Breakers ( ABCB )


The ACB used in high voltage lines is not like the medium voltage circuit breaker, this circuit breaker is called the ABCB circuit breaker.


Circuit breaker used


1. Miniature Circuit Breaker( MCB )

2. Electric Leakage Circuit Breaker ( ELCB )

3 . Residual Current Circuit Breaker ( RCCB )

4 . Moulded Case Circuit Breaker ( MCCB )

5. Motor Protection Circuit Breaker ( MPCB )

6. Air Circuit Breaker ( ACB )

7.  Air Blast Circuit Breakers ( ABCB )

8.  Vacuum Circuit Breaker ( VCB )

9. Sulphur Hexafluoride Circuit Breaker ( SF6 )

10. Oil Circuit Breaker ( OCB )

11. Residual current circuit breaker (RCBO )


FAQ In types of circuit breaker


Q1. How much voltage sf6 circuit breaker is used?

Ans: Used in the upper line of 1000V voltage.


Q2. How many high voltage circuit breakers?

Ans: High voltage circuit breakers are usually three. Such as ABCB, VCB, SF6


Q3. Where are spring-type circuit breakers used?

Ans: Voltage below 11KV, 33KV is used.


Q4. Which are the low voltage circuit breakers?

Ans: MCB, MCCB, MPCB, ELCB, RCCB, ACB etc.


Q5. Which circuit breaker is used in high voltage lines instead of ACB?

Ans: Air Blast Circuit Breakers ( ABCB ) circuit breakers are used instead of ACB in high voltage lines.

If you have any doudts.Please let me know

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