Actually, the thing is vacuum has high arc quenching property compare to air because in VCB, the die electric strengths equal to 8 times of air. That y always vacuum used as in HT breaker and air used as in LT.
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A Static Transfer Switch (STS) utilizes a static electronic component (SCR), which permits a transfer in less than four milliseconds (1/4 o...
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WTI and OTI of Transformer The WTI means winding temperature Indicator and OTI means Oil Temperature Indicator which indicates the win...
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The generator protection device is mainly used for the control and protection of high and low voltage generator sets. the generator microco...
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When the supply is cut off for a running motor, it still continues running due to inertia. In order to stop it quickly, we place a load (re...
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It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as the insulation level of t...
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Circuit Breaker is one that makes or breaks the circuit. It has two contacts namely fixed contact & moving contact. Under normal condit...
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Over-current / Earth fault relays are the basic protection relays. Used for protection of transformers and feeders from over current and ...
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There are two types of exciters, static exciter, and rotary exciter. The purpose of the exciter is to supply the excitation dc voltage to t...
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protection function of generator transformer protection relay Differential instantaneous trip protection, Proportional differen...
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