A transient surge protector, also known as a surge protection device (SPD), surge suppressor, spike suppressor, or transient voltage surge suppressor (TVSS), is an appliance or device designed to protect electrical devices from voltage spikes in alternating current (AC) circuits1. It works by limiting the voltage supplied to an electric device by either blocking or shorting current to reduce the voltage below a safe threshold1. The surge protector contains a metal oxide varistor (MOV) that diverts any extra voltage to the ground, preventing it from reaching the connected devices2. Transient surge protectors are essential for maintaining reliable and stable commercial facility operations, protecting electrical systems from lightning strikes, grid switches, and system faults3. They are used in various applications, including power lines, motor device safety, and telephone lines4.
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