how can we change the phase angle b/w two phase?

2 Answers  

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What are the tests to be done on circuit breaker?

1 Answers  

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what happens if DC earthing and AC earthings are shorted?

1 Answers  

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how to calculate insulation level of transformer?

0 Answers  

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why transformer not used to starter

1 Answers  

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what is the difference between dry and wet type of 132kV terminations. which one is durable

0 Answers  

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WHAT WILL HAPPEN IF WE START A MOTOR WITH STAR & IT IS RUNNING WITH STAR CONNECTION INSTEAD OF DELTA

3 Answers  

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what is the difference between earth, neutral and ground?

1 Answers   Farnek, Shyam Indus Power, Spiro Solutions,

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

0 Answers  

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I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

0 Answers  

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howmany insolaters needed in 66kv line

9 Answers   Essar, L&T,

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what is the basic need of domestic loads 1- voltage 2- current

0 Answers  

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