Advantages & Disadvantages of Oil Circuit Breakers
April 24, 2016
Oil circuit breakers are the oldest type of circuit breakers. The separating contacts of the oil circuit breakers are made...
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Functions of Instrument Transformers (CTs and PTs)
April 24, 2016
AC type protective relays are actuated by the current and voltage supplied by the current and potential (voltage) transformers which...
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Advantages & Disadvantages Electromagnetic Relays
April 24, 2016
In Electromagnetic relays operating current flows through the coil. When this operating current increases, coil energizes the electromagnet. When the...
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Neutral Grounding Practice in Power System
April 24, 2016
Generally on neutral grounding is provided at each voltage. There will be several voltage levels between the generation of the...
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What Is Step and Touch Potential and Reducing Resistance To Ground?
April 24, 2016
Step Potential Step potential is the step voltage between the feet of a person standing near an energized grounded object....
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Top 100 Switchgear and Protection Interview Questions
April 22, 2016
What are the functions of protective relays To detect the fault and initiate the operation of the circuit breaker to...
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