What component helps to protect against voltage transients in switchgear?

The component that is specifically designed to protect against voltage transients in switchgear is the surge arrester. Surge arresters function by providing a path for excess voltage to be diverted safely to the ground, thus preventing damage to the electrical components within the switchgear. When a sudden increase in voltage occurs, such as during a lightning strike or switching operation, the surge arrester activates and limits the voltage to a safe level, absorbing the energy from the transient event.

In contrast, components like control relays, transformers, and current transformers serve different roles within electrical systems. Control relays are used for switching operations and controlling circuit conditions but do not inherently protect against transients. Transformers alter voltage levels for distribution but do not provide transient protection. Current transformers are primarily used for measuring current and providing feedback for control systems, also lacking the capability to protect against voltage spikes.

By using surge arresters within switchgear systems, operators can enhance system reliability and longevity, safeguarding equipment from potentially destructive transients.