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This document discusses protective relays, which are devices that detect faults in electrical systems and signal circuit breakers to isolate faulty equipment. Protective relays must be selective, fast, reliable, simple, sensitive, and economical. There are two main types of relays: electromagnetic attraction relays, which use a magnetic plunger that closes contacts when pulled; and electromagnetic induction relays, which use rotating discs or cups that close contacts due to induced torque from magnetic flux
- Author
- sudheerreddy115
- Language
- EN