Studying and Testing
A lightning arrestor or a surge diverter is a protective device which conducts the high
voltage surges on the power system to the ground.
Surge protection has been a primary concern when connecting devices and
equipment to low-, medium-, or high-voltage electrical systems. As the use of products and
equipment with components and insulation systems vulnerable to voltage surges and spikes
continues to increase, the requirement for surge arresters to protect against the effects due
to lightning strikes, switching phenomenon, etc., continues to increase as well. From
personal computers to HV transmission and distribution systems, everything is susceptible
to these surges and their destructive effects.
The earthing screen and ground wires can well protect the electrical system against
any direct lightning strokes but they fail to provide protection against travelling waves which
may reach the terminal apparatus. The lightning arresters or surge diverters provide
protection against such surges.
A lightning arrester is a device used on the electrical power system to protect the
insulation from the damaging effect of the lightning. Metal oxide varistors (MOVs) have
been used power protection since the mid-1970s. The typical lightning arrester also known
as surge arrester has a high voltage terminal and ground terminal. When a lightning surge or
switching surge travels down the power system to the arrester, the current from the surge is
diverted around the protected insulation in most cases to the earth. This disclosure relates
to a voltage surge arrester for use with an electrical device having a component to be
protected from a voltage surge.
In this Blog Post, we are going to Discuss about surge arresters. These surge arresters
will be subjected to various tests and characteristics are then studied.
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