Wednesday, February 17, 2016

FUSE

Fuse Introduction: A fuse is a short piece of metal , inserted in the circuit, Which melts when excessive current flows through it and thus breaks the circuit .

How it work
 The fuse element is generally made of materials having low melting point ,high conductivity and least deterioration due to oxidation eg., silver, copper etc. It is inserted in series with the circuit to be protected . Under normal operating conditions , the fuse element is at a temperature below its melting point . Therefore , it carries the normal current without overheating . However , When a short-circuit or overload occurs, the current through the fuse increases beyond its rated value. This raises the temperature and fuse element melts (or blows out), disconnecting the circuit protected by it. In this way , a fuse protects the machines and equipment from damage due to excessive currents.




Electrical fuse 

1 comment:

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