LIGHTNING ARRESTER

About LIGHTNING ARRESTER

A lightning arrester also known as a surge arrester or lightning protector is a device used to protect electrical equipment and systems from damage caused by lightning strikes or voltage surges It works by diverting excess voltage to the ground ensuring that the electrical system remains safe and functional

 Key Functions of a Lightning Arrester

1 Surge Protection Protects equipment from highvoltage surges caused by lightning strikes or switching events

2 Grounding Safely directs the surge current to the ground preventing it from flowing through the electrical system

3 Voltage Limitation Limits the voltage across the equipment to a safe level ensuring no damage occurs

 Types of Lightning Arresters

1 Rod Gap Arrester A simple type of arrester with a gap between two rods When the voltage exceeds a certain level the gap sparks over and diverts the surge

2 ExpulsionType Arrester Uses a gasfilled tube to extinguish the arc after the surge is diverted

3 ValveType Arrester Contains a nonlinear resistor usually made of zinc oxide that provides a lowresistance path for highvoltage surges

4 MetalOxide Varistor MOV Arrester Commonly used in modern systems it uses a metaloxide component to clamp voltage surges