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Switchgear & Protection

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

Methods to Reduce Step Potential and Touch Potential in Substation

S Bharadwaj Reddy
Step Potential and Touch Potentials are very important in substations because during ground faults all the ground current returns to the substation transformer (as the substation transformer is grounded). The

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