Beskyttelsesrelæers

Beskyttelsesrelæers, also known as protective relays, are electrical devices used to protect electrical power systems from damage caused by overloads, short circuits, or ground faults. They operate by detecting abnormal conditions and initiating corrective measures, such as tripping circuit breakers or disconnecting faulty equipment, to isolate the problem and prevent further damage.

There are various types of beskyttelsesrelæers, each designed to address specific types of faults. Overcurrent relays, for example, respond to excessive current flow, while differential relays compare current entering and leaving a protected zone to detect internal faults. Ground fault relays monitor for current leakage to ground, and distance relays measure the impedance between the relay and the fault location to determine the fault's distance from the relay.

Beskyttelsesrelæers are crucial components in power system protection, ensuring the reliability and safety of electrical infrastructure. They are typically installed in substations, power plants, and other critical facilities where electrical equipment is at risk of damage from faults. Regular maintenance and testing of beskyttelsesrelæers are essential to ensure their proper functioning and the overall reliability of the power system.