In the context of lightning arrestors, what does the abbreviation MOV stand for?

The abbreviation MOV stands for Metal Oxide Varistors. This is a crucial component used in lightning arrestors and surge protection devices. Metal Oxide Varistors are designed to protect electrical equipment from voltage spikes by clamping down the voltage to a safer level during a surge. They do this by exhibiting a nonlinear resistance that decreases significantly when a voltage threshold is exceeded, allowing overvoltage conditions to be diverted away from sensitive equipment.

In applications where lightning strikes or electrical surges may occur, MOVs are essential because they can absorb and dissipate excess energy. Their ability to respond quickly to transient voltages makes them effective in preventing damage to critical electrical and electronic systems. Understanding the role of MOVs is fundamental for anyone working with surge protection devices and ensuring the safety and longevity of electrical systems.