A lightning arrester is also known as a surge arrester is a protective device used in electrical power systems and telecommunication systems to protect the insulation and conductors from the damaging effects of lightning strikes and other high-voltage surges
to protect all PV systems from lightning, Lightning Arrestors may not be mandated for PV systems with capacities less than 10 kW. It is highly recommended for PV systems to have dedicated lightning arrestors rather than depending on foreign rods and structures at greater heights that might exist at the time of installation.
Working Principle
- High-Voltage Terminal and Ground Terminal:Lightning arresters have a high-voltage terminal connected to the power line and a ground terminal connected to the earth.
- Surge Diversion: When a lightning surge or high-voltage spike travels along the power line, the arrester diverts the surge current to the ground, protecting the electrical equipment
Types of Lightning Arresters
- Rod Type: Uses a rod to attract lightning strikes and divert the current to the ground.
- Sphere Gap Arrester: Consists of two spherical electrodes separated by an air gap.
- Multiple-Gap Arrester: Uses multiple air gaps to handle higher voltage surges.
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