A surge arrester is a device used to protect electrical equipment from damage caused by voltage spikes. Surge arresters work by diverting excess voltage from sensitive equipment and dissipating it safely. When a voltage spike occurs, the surge arrester will conduct the extra voltage away from the equipment and into the ground.
Surge arresters are an essential part of power systems, as they can protect equipment from damage caused by lightning strikes or faults in the electrical grid. In this blog post, we’ll look at the surge arrester working principle.
How Does A Surge Arrester Work?
Surge arresters work by diverting surplus voltage away from sensitive equipment during a power surge. They are typically installed when power enters a building or electrical system. When a surge in voltage occurs, the surge arrester will redirect the excess voltage to the ground, protecting the equipment from damage.
Surge arresters are an essential part of any electrical system and can help prevent costly equipment damage. If you are unsure if your system needs a surge arrester, please consult qualified electricians at Laxmi Associates.
The Types Of Surge Arresters
There are two main types of surge arresters: metal-oxide varistors (MOVs) and gas-filled tubes (GFTs).
MOVs or metal oxide surge arresters are the most common type of surge arrester. They are made of a semiconductor material that can conduct electricity under normal conditions but will resist electrical flow during a voltage surge. This resistance helps to dissipate the excess energy and protect the equipment.
GFTs are less common but offer some advantages over MOVs. They are filled with a gas that helps dissipate the electrical energy and are not as susceptible to damage from voltage spikes. However, GFT degrades as time passes.
The Metal Oxide Surge Arrester Working Principle
Metal oxide surge arresters are typically made of two metal oxide varistors connected in series with a resistor. When a surge voltage is applied to the arresters, the varistors conduct the surge current and protect the equipment. The resistor then dissipates the surge energy as heat.
The metal oxide surge arrester working principle is simple, but these devices can protect sensitive electronic equipment adequately. MOSAs are commonly used in electrical power systems to protect against lightning strikes and other voltage surges. They are also used in electronic equipment such as computers and telecommunications equipment. MOSAs can protect against both AC and DC voltage surges.
For more information on metal oxide surge arresters and other electrical grid components, visit us at Laxmi Associates.