Thursday, May 27, 2010

Electrical switch


Electrical switch


An electrical switch is a commonly used device for making, breaking, or changing the course of an electric circuit. There are different types of electrical switches being manufactured for use in different applications.

Electrical SwitchElectrical Switch

Composition of Electrical Switches
It consists of two or more contacts that are mounted on an insulating structure and is so arranged that they can be moved into and out of contact with each other with the help of a suitable operating mechanism.

The two contacts in a switch are made of metal and the metal is chosen keeping in mind the resistance to corrosion, as most metals are likely to form insulating oxides, which further prevents the switch from working. Contacts in a switch are often plated with noble metal. The switch also has an actuator - a moving part that is used for applying operating force to the contacts.

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