In electrical systems, what does an arrester do when abnormal voltage occurs?

An arrester serves as a protective device in electrical systems, specifically designed to manage abnormal voltage situations, such as surges or spikes. When there is an overvoltage event, an arrester diverts the excessive electrical energy away from sensitive equipment and channels it safely to the ground. This process helps prevent damage to electrical systems and equipment by limiting the voltage that can reach critical components.

The design of an arrester typically includes materials and mechanisms that activate rapidly during a voltage surge, enabling it to respond instantaneously to prevent potential damage. By effectively directing the excess energy safely to the ground, the arrester plays a vital role in maintaining the stability and safety of electrical systems, ensuring that they operate within their designed voltage limits. This function of diversion is essential in protecting infrastructure and enhancing the lifespan of electrical components.