Electrical Surge Arrester

Electrical surge arresters, also known as surge protectors or lightning arresters, are devices used to protect electrical equipment from voltage spikes or surges. They are part of the supply class "Fuses, Arrestors, Absorbers, And Protectors" in the supply group "Electrical And Electronic Equipment Components."

Surge arresters work by diverting excess voltage away from sensitive equipment, such as computers, televisions, or other electronic devices. When a voltage surge occurs, the surge arrester detects the increase in voltage and redirects the excess energy to the ground, preventing it from damaging the connected equipment.

There are different types of surge arresters available, including:

1. Metal Oxide Varistor (MOV) Surge Arresters: These are the most common type of surge arresters and are typically used in residential and commercial applications. MOV surge arresters use a metal oxide varistor to absorb and dissipate the excess voltage.

2. Gas Discharge Tube (GDT) Surge Arresters: GDT surge arresters use a gas-filled tube that ionizes when a voltage surge occurs. This ionization creates a low-resistance path for the excess energy to flow through, protecting the connected equipment.

3. Silicon Avalanche Diode (SAD) Surge Arresters: SAD surge arresters use a silicon diode that conducts excess voltage when a surge occurs. This diode quickly diverts the excess energy away from the connected equipment.

Surge arresters are typically installed at the point of entry of electrical power, such as the main electrical panel or distribution board. They can also be installed at individual outlets or on specific equipment to provide additional protection.

It is important to note that surge arresters have a limited lifespan and may need to be replaced periodically to ensure continued protection. Additionally, surge arresters should be properly sized and installed according to the specific requirements of the electrical system.

Overall, electrical surge arresters are essential components in protecting electrical and electronic equipment from voltage surges, ensuring their safe and reliable operation.