What is Protection Relay?

A protection relay is a device used in electrical power systems to detect abnormal conditions such as overcurrents, overvoltages, under-voltages, and faults. Its primary function is to isolate the faulty part of the power system while keeping the rest of the system operational. Protection relays are crucial for ensuring the safety and reliability of electrical networks by preventing damage to equipment and minimizing the risk of electrical accidents.

Key functions of protection relays include:

  1. Fault Detection: Protection relays continuously monitor electrical parameters in the power system and detect abnormalities such as short circuits, ground faults, and overloads.
  2. Isolation: When a... Read More
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