Why the efficiency of a three-phase induction is the motor is less than that of a three-phase transformer?

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WHAT IS THESETTING CALCULATION FOR THE RELAY?

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Motor,transformers,capacitor tubelight etc....

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what is the difference between active power and reactive power and apparant power in practical as well as theoritical

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Is it possible to import & export power through the same power transformer? what will be the vector group normally for both different or same?

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What will happen to the speed of synchronous machine subjected beyond the pull out torque? Are the behavior shown by rotor remains same for both the alternator and motor?

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bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

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if we put a energy meter in 500 kvar capacitor bank ,then how much units show in energy meter per day.

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in 11kv generators the neutral point is connected to earth via earth coil while in the 33 / 11 kv transformer the neutral point is connected to earth via earth resistor why? 

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in communication what is the role of elelctrical engineer?

3 Answers   Quippo, Reliance,

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How do i calculate sizing of transformer on didstrubution load for high rise building.What should be MVA Rating of MV Panel feding by 122 kv.

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what are the standard values for resistances(Megger testing) between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?

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