By: Rudy Silva
Submitted: 2010-02-14 20:09:36 | Word Count: 568
Circuit breakers are an electrical switch which is operated and designed to protect an electrical circuit from destruction. Damage will occur to an circuit or circuit breaker when there is an overload of electricity or short-circuit.
The fundamental function of commercial circuit breakers or circuit current sensor is to sense a fault condition. If there is one fault, the breakers discontinue the electrical flow. Made of varying sizes, industrial breakers can be reset manually or automatically to continue usual operation.
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Breakers can be a little device to shield a single household appliance or massive switchgear fashioned to shield high voltage circuits that serve a complete town. There are 3 sorts of circuit breakers based mostly on their voltage.
A low-voltage breaker is made for circuits at 1000 volts or less. The molded circuit breaker is one of the most commonly used low-voltage air circuit current sensor. This is often the breaker used usually in homes, certain industrial applications and small businesses.
Types of low-voltage circuit breakers include the Miniature Circuit Breaker or MCB, and Molded Case Circuit Breaker or MCCB. The MCBs are for applications with electrical energy rate not exceeding 100A. They can be used as thermal or thermal-magnetic operations.
Low-voltage breakers are installed within draw-out enclosures to allow removal and interchange without dismantling switchgear. The massive low-voltage molded case and power breakers have electrical motor operators to open and shut them using remote control.
Medium-voltage circuit breakers are meant for applications requiring voltage of higher than 1,000 but not more than 2000. They can be used indoor or outdoor. For indoor function, a circuit breaker is used together with enclosed switchgear lineup. For outside function, a circuit breaker is used as an individual part installed in substation.
There are 3 types of medium-voltage breakers. These are vacuum circuit breaker, air circuit breaker and SF6 circuit breaker. A vacuum circuit current sensor is used for electrical volts of 3000 A. it is used to interrupt the electric flow by producing and extinguishing the arc in a vacuum container.
Air circuit breaker is for applications of 10,000 A. It's usually used for main power distribution in large modern plants to have simple and convenient maintenance. SF6 circuit breakers put out the arc in a container crammed with sulfur hexafluoride gases.
Medium-voltage breakers can be connected into a circuit by bolted connections to bus bars or wires, particularly in switchyards found in most outdoors. These breakers, which are lined-up in switchgear, are made with draw-out construction. Such construction is useful in removing the breaker without interrupting the power circuit connections.
High-voltage circuit breakers are used if the electrical voltage is 72,500 or higher as set by the International Electro-technical Commission. The underlying characteristic in most of the 3 types of circuit breakers is their solenoid application.
High-voltage circuit current sensors are used to safeguard and control electrical power transmission networks. They are built with current sensing protecting relays maneuvered through electrical transformers. They are categorized in keeping with the tool used to put out the arc, which involves the air blast, minimum oil, bulk oil, vacuum and SF6.
Author Resource:-
Relectric at http://www.relectric.com is prepared to provide you with circuit breakers. You can also get used or refurbished breakers. New breakers of the newest type are available. Do you want help selecting the circuit breaker for your application? Go to Moeller-circuit-breakers and obtain help to search out your breaker.
