Answer Posted / umer

khalid shikh is absolutely correct

Direction of flow of active power and reactive power with logic?

1709

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State ohm’s law?

1038

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what is transformor oil gread

2456

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explain the Trip supervision circuit

2089

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

1911

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In synchronous motor, how the field current is related to armature current..i know its inversely proportional..but concept wise...i was nt clear....pls help me...

1974

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how to maintain frenquncy with syncronising sub-station for distribution

2067

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How shall i select the value of capacitor or inductor in a system?

1853

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what is the internal working of star delta starter

2054

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Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?

2191

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Explain few advantages of electric traction system?

1058

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what are the components in electrical control panel (for example: 415V, 3-ph, panel to operate utility and 3-ph DG set).

1974

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Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

2054

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A cotter joint is generally used to transmit

1185

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in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?

1842

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