5 Questions
Name two types of circuit interruption devices.
Fuses and circuit breakers
What is a fuse?
A fuse is a short piece of metal inserted in the circuit that melts when excessive current flows through it and breaks the circuit.
What are the requirements of a fuse element?
The requirements of a fuse element are: i) Low melting point, ii) High conductivity, iii) Least deterioration due to oxidation.
How does a fuse work?
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.
What factors determine the time required to melt the fuse element?
The time required to melt the fuse element depends on the magnitude of the current flowing through it.
Test your knowledge on circuit interruption devices with this quiz! Learn about fuses and their fuse element materials, as well as their requirements for breaking the circuit.
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