Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics

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What is class 2 coordination ?

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Compare salient pole and Hndrical rotor machines.

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Please sent me some previous year question papers of BSNL-JTO telecom and RRB in ELectrical Engineering to varshashahi@yahoo.com

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why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?

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at which voltage level arcing ground is occurs ??????????

0 Answers   TATA,

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Why do we pefer VCB over OCB?What are the advantages of VCB over OCB?

0 Answers   CEB,

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Is there any difference between circuit breakers and isolators

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what is phase to phase to phase to ground fault

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what are the effects of variations in frequency when you are connected to national grid??

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what is the difference between on line & off line UPS

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The capacity of the transformer is 20/25 MVA, Ratio is 132/11 KV, Vactor group YNyno. and impedance is 10.07%. As per the calculation the secondary current is 1312.2Amps. The maximum fault current the transformer should sustain is 13.030KA. How many times the transformer should sustain the maximum short circuit current of 13.030KA over a period up 1 Year. The transformer is repaired one & 10 Years old.

1 Answers  

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