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Working Principle Of Lightning Arrester

Update:10 Aug 2019
Summary:

Lightning arrester product demand is in a certain space […]

Lightning arrester product demand is in a certain space, and the main consumer countries are moderately developed countries and developed countries.

It is a protective device which conducts the high voltage surge on the power system to ground. The earthing screen and ground wires fail to provide protection against traveling waves. The lightning arrester provides protection against surges.

The applications of Lightning Arrester can be divided into: Transmission Line, Substation and Others.

The earthing screen and ground wires can well protect the electrical system against direct lightning strokes but they fail to provide protection against traveling waves, which may reach the terminal apparatus. The lightning arresters or surge diverts provide protection against such surges. A lightning arrester or a surge diverted is a protective device, which conducts the high voltage surges on the power system to the ground.

The earthing screen and ground wires can well protect the electrical system against direct lightning strokes but they fail to provide protection against traveling waves, which may reach the terminal apparatus. The lightning arresters or surge diverters provide protection against such surges. A lightning arrester or a surge diverted is a protective device, which conducts the high voltage surges on the power system to the ground.

It consists of a spark gap in series with a non-linear resistor. One end of the diverter is connected to the terminal of the equipment to be protected and the other end is effectively grounded. The length of the gap is so set that normal voltage is not enough to cause an arc but a dangerously high voltage will break down the air insulation and form an arc. The property of the non-linear resistance is that its resistance increases as the voltage (or current) increases and vice-versa.