Answer / vinod

low starting tarque

Answer / guru101

Synchronous motor Three phase motor but it two winding
which are connected to rotor after 70% it'll be connected.
In the intial time Synchronour motor are not three Phase
but after about 70% speed it'll make Three phase. In the
starting Condiction, it is working as 2phase. it has zero
slip under usual operating conditions. Contrast this with
an induction motor, which must slip in order to produce
torque

Answer / vamsi

it does not having revolving field
because it works on 2 powersuplys ac & dc

Is it possible to power factor more than unity?

9 Answers   BEL,

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comparision between ACB and VCB

0 Answers   Lupin,

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In a generator (Synchronous) does the rotor speed (frequency) corresponds to the speed of the water (in hydro). does the torque on the turbine relate to the flow of water?

2 Answers  

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If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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how to flameproof electrical motor on the shaft?

0 Answers  

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Sir I want questions for rrb sec technician gr III (electrical)

1 Answers   RRB,

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What do you mean by S.F.U. unit? application of it.

16 Answers   Indo Asian,

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In oil transformer which oil is used & what should be the insulation resistance & heating capacity.

2 Answers  

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we have 350 kva capcitor bank which is not showing KW. dose capacitor shows kW OR not.

2 Answers  

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What is the significance of vector grouping in Power Transformers??

3 Answers  

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In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

0 Answers  

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Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

0 Answers  

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