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CBSE Class 12-science Answered

Explain the working principle of a lightning arrester.
Asked by www.ayushdebbarma615 | 16 Jan, 2021, 01:49: PM
answered-by-expert Expert Answer
The circuit which is protected from the strokes of lightning with the help of a protection deviceis known as lightning arrester.
Here the lightning strokes are nothing but surges with high transient voltage, arcs of isolation, spark, and surge currents
because of lightning. These devices are used to defend the power systems by forwarding the high voltage surges in the
direction of the ground. 
Lightning arrestor working principle is, once the voltage surge travels throughout the conductor then it reaches the
location of the arrestor where it is installed. So it will break down the insulation of the lightning arrestor for a moment,
so voltage surge can be discharged toward the ground. Once the voltage of the system falls under the fixed value,
then the insulation will be restored among the ground & conductor. Further, the current flow toward the ground will be stopped.
Answered by Thiyagarajan K | 16 Jan, 2021, 02:19: PM
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