What is circuit breaker mean ?
Circuit breaker is a device designed to shut off an electrical circuit when too much current is flowing. This usually occurs if too many devices are plugged in or if there is a short circuit. Circuit breakers are usually installed in the electrical panel. Inside the circuit breaker, there is usually two contacts which is touched between. When detect a fault in the system, poles are divided each other. The system reacts to immediate short circuits. The process can be change different circuit breaker types.
TypesThe types of circuit breakers can be divided by these fields;
By voltage level
Low voltage circuit breakersCommon in domestic, small industrial and commercial applications include Miniature circuit breaker (type B, type C and type D)and Molded Case Circuit Breaker versions.Characteristics given by international standards.Also It is made for DC applications.
Oil circuit breaker
Common in domestic, small industrial and commercial applications include Miniature circuit breaker (type B, type C and type D)and Molded Case Circuit Breaker versions. Characteristics given by international standards. Also It is made for DC applications.
SF6 Gas circuit breakerIn this type of circuit breaker, the contacts of device surrounded by SF6
They are most often used for high voltage transmission-level voltages. Especially cold places heating might be require to prevent gas liquefaction.
Disconnecting circuit breaker (DCB)
The disconnecting circuit breaker (DCB) was introduced in 2000 and is a high-voltage circuit breaker modeled after the SF6-breaker. The DCB is also high voltage circuit breaker.
The type of circuit breaker reduces the space requirement, increases availability and reliability.
Vacuum Circuit BreakerIn this circuit breaker, the fixed and moving contact is enclosed in a permanently vacuum area.Vacuum circuit breaker has a high insulating medium for arc extinction as compared to the other circuit breaker.
When the fault occurs in the system, the contacts of the breaker are moved apart and hence the arc is developed between them.
Carbon dioxide (CO2) high-voltage circuit breakersWorks on the same principle as Sulphurre hexafluoride circuit breaker, can also be produced as a disconnecting circuit breakers, high voltage breakerPossible to reduce nearly 10 tons of carbon dioxide emissions during the product’s life time .
ConclusionCircuit breaker is an essential part of electrical network as it protects every device from electrical damage. Helps us to detect the fault and the area associated with it. Day by day circuit breaker technology is increasing and new techniques invent. So, the circuit breakers becoming safer than older types. Nowadays, most common circuit breake types are vacuum and sulphur hexaflouride circuit breakers are widely used due to their reliable and fast operations.
Wikipedia.com, Mr. Priyankar Misra's presentation, circuitglobe.com
Mehmet Çağrı Aksoy - Kaunas University Of Applied Engineering Sciences All rights reserved.