Definition of Switch Gear
Solution:
The device used for switching, controlling and protecting the electrical circuits and equipments.
Example:
1.Fuse
2.Circuit breaker
3.Relay
4.Switches
Protective Relay
Solution: The device detect the fault and initiate the operation of the circuit breaker to isolate the defective element from the power system. Types: 1. Directional relay i.Induction type over current relay ii.Induction type reverse power relay 2. Differential relay 3. Distance relay (Based on transmission line distance) i.Impedance relay ii.Reactance relay iii.Admittance relay
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