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Which of the following device is commonly used for lightening protection?

Which of the following device is commonly used for lightening protection? Correct Answer ZnO Varistor

ZnO Varistor is commonly used for lightening protection because of the following merits.

1. It eliminates the risk of spark over and also the risk of shock to the system when the gaps break down.

2. It eliminates the need of voltage grading system.

3. At the normal operating condition, the leakage current in the ZnO is very low as compared to other diverters.

4. There is no power flow current in ZnO diverter.

5. It has high energy absorbing capability.

6. ZnO diverters possess high stability during and after prolonged discharge.

7. In ZnO diverter, it is possible to control the dynamic over voltages in addition to switching surges. This results in economic insulation coordination.

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