Circuit Interruption Devices Quiz

Fuses and circuit breakers

A fuse is a short piece of metal inserted in the circuit that melts when excessive current flows through it and breaks the circuit.

The requirements of a fuse element are: i) Low melting point, ii) High conductivity, iii) Least deterioration due to oxidation.

<p>At normal operating conditions, the current flowing through the fuse element is less than or equal to the rated value. When overload or short circuit occurs, the current exceeds the rated value and melts the fuse element, breaking the circuit.</p> Signup and view all the answers

<p>The time required to melt the fuse element depends on the magnitude of the current flowing through it.</p> Signup and view all the answers