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Advantages & Disadvantages of Oil Circuit Breakers

S Bharadwaj Reddy
Oil circuit breakers are the oldest type of circuit breakers. The separating contacts of the oil circuit breakers are made to separate within the insulating oil which has better insulating...

Functions of Instrument Transformers (CTs and PTs)

S Bharadwaj Reddy
AC type protective relays are actuated by the current and voltage supplied by the current and potential (voltage) transformers which are generally classified as instrument transformers. Generally instrument transformers are...

What Is Step and Touch Potential and Reducing Resistance To Ground?

S Bharadwaj Reddy
Step Potential Step potential is the step voltage between the feet of a person standing near an energized grounded object. It is equal to the difference in voltage, given by...

Top 100 Switchgear and Protection Interview Questions

S Bharadwaj Reddy
What are the functions of protective relays To detect the fault and initiate the operation of the circuit breaker to isolate the defective element from the rest of the system,...

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