In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

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how can i reduce sparking without stepdowning the voltage

0 Answers  

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generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

0 Answers  

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which types of tests are required after commissioning of 6.6 kva tranformer?

3 Answers   Reliance,

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how to select a breaker (MCB,MCCB,ELCB) for 18.5 kw, 3 ph. 480 v, 60 hz induction motor?

4 Answers  

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what is the method of earthing of a transformer using electrodes?

0 Answers  

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why white color LED light is not possible?

1 Answers  

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which technique servo motor tested o.k or faulty ?

1 Answers   ABB,

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A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?

2 Answers  

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can volts/Hz be relied upon to use 460v,60Hz electric motors on a 380v,50Hz power supply?

1 Answers  

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what are difference between indoor and out door substation

1 Answers  

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WHERE to use CVT & PT.

11 Answers   Suzuki,

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