DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

6 Answers   GE,

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What is CRT (Contact Resistance Test) for Isolators or Dis- connector Switches? Why we performed it & whats the Testing procedure.

1 Answers   Siemens,

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why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??

0 Answers   Descon,

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why corona loss is less with negative polarity?

3 Answers  

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what is the formula for AH?HOW CAN IT CALCULATE

1 Answers  

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what is meant by lagging & leading current

1 Answers   TATA,

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Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?

1 Answers  

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working principles of cf lamp,incandescentlamp and f lamp?

0 Answers  

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Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .

0 Answers  

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my N-P 230 VAC at 3 wires but i haven't any voltages at phase to phase whither my supply is 3 phase, why i haven't received these line to line voltages ?

2 Answers  

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How the speed of synchronous motor changes with the variation of load?

1 Answers  

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is it possible to use a tranformer to regulate an unstable system voltage?

3 Answers  

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