Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,

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Generator,motor and alternator Working principal Please explain easily

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How to calculate electrical Induction motor heating and cooling time constant,11KV,2850,12P,SCIM

2 Answers   Bhel, Regal Beloit,

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prefer any good electrical engineering book.....it should be useful in the practical fied?

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L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

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Why are lt windings placed near the core?

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difference between local breaker backup relay or backup protection relay ?

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condition Autotrip facia come on control panel of electrical transmission line?

0 Answers   Getco,

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what happens when the phase and earth wires comes in contact? and why

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ROC converges if pole and zero lies inside a) origin b) z=1 c) pole d) zero ? Explanation please? if ROC does not converges then?

0 Answers   CCP,

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how can we find thae value of capacitor for single phase motor. what is difference between starting capacitor and running capacitor.

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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.

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