What is Overvoltage Protection ?

What is Overvoltage Protection ?

Overvoltage Protection Definition

Overvoltage protection is defined as measures taken to prevent electrical systems from damage due to excessive voltage levels.

Causes of Overvoltage

Overvoltages can be caused by lightning, switching operations, insulation failure, arcing ground, and resonance.

Switching Impulse

When a no-load transmission line is suddenly switched on or off, it can create a transient overvoltage in the system.

Lightning Impulse

Lightning can cause very high overvoltage surges that are highly destructive and need to be prevented.

Methods of Protection Against Lightning

• Earthing screen

• Overhead earth wire

• Lighning arrester or surge dividers

Methods of Protection Against Overvoltage

Protection methods include earthing screens, overhead earth wires, and lightning arresters.