Circuit Breaker Types And Uses Pdf

Magnetic type circuit breakers.

Circuit breaker types and uses pdf. Since the general and most common way of classification of circuit breakers is based on medium used for arc extinction we will see different types of circuit breakers based on the same. 3 to 5 times rated current. Without a circuit breaker there is a high risk of electrical fires electrocution and electrical shocks. These circuit breakers use the principle of electromagnetism to break the circuit.

5 to 10 times rated current. What is miniature circuit breaker mcb. An mcb or miniature circuit breaker is an electromagnetic device that embodies complete enclosure in a molded insulating material. The decision to use type b c or d miniature circuit breakers for final circuit protection in residential commercial industrial or public buildings can be based on a few simple rules.

So when the current passing through the circuit increases the electromagnetic force increases and the contact is pulled away. It operates in air where air blast as an arc quenching medium at atmospheric pressure to protect the connected electric circuits. Circuit breakers below rated voltage of 1000v are known as the low voltage circuit breakers and above 1000v are called the high voltage circuit breakers. However an understanding of the differences between these types of devices can help the installer overcome problems of unwanted tripping or make a suitable selection where lines of demarcation are less clearly.

Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. Different types of circuit breakers. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit its basic function is to interrupt current flow after a fault is detected. There are different types of circuit breakers which are based on voltage installation location external design and interrupting.

This type of circuit breaker is used for purely resistive loads or loads with a very small inductive component. Such types of circuit breakers are as follows oil circuit breaker. Air circuit breaker sf6 circuit breaker vacuum circuit breaker and oil circuit breaker have been discussed in a short detailed just to understand the basic concept about these circuit breakers. An electrical circuit breaker is a switching device that can be operated manually or automatically for controlling and protecting the electrical power system.

The most general way of the classification of the circuit breaker is on the basis of the medium of arc extinction. Now we come to the three most common types of circuit breakers used. Type b circuit breakers. Usually the medium used for extinction of arc is air oil sulfurhexafluoride gas or vacuum.

Type c circuit breakers. The main function of an mcb is to switch the circuit i e to open the circuit which has been connected to it automatically when the current passing through it mcb exceeds the value for which it is set. Thermal type circuit breakers.