Types of Insulator
Solution:
- Pin insulator (Upto 33KV)
- Suspension type insulator (More than 33KV)
- Strain insulator (Less than 11KV)
- Shackle insulator (Low voltage)
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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