Answer / rabi

KW/Kg is more for 3 phase motor than single phase motor of
same rating. also there is no need of starting winding for
creating RMF in 3-phase induction motor.

Answer / gunasekaran

3phase motor less noise than single phase motor why because
single phase motor always receiving pulsating field but
3phase not like that and then speed torque characteristic
also good for 3phase motor. Resultant flux in the single
phase is zero so it is not self starting but 3phase motor
not like that

Answer / rajiv mahajan

good starting torque
compact size
no capacitor required

Answer / dileep

because if u take a same capacity rating of both 1 phase
and 3 phase ,the size of 3 -phase motor is small compared
to 1-phase.

anyone please send transformer parameter design formulas & details of tap changer ? plz i have interview this week its more helpful for me ?

0 Answers  

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Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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if single phase is having 220v supply then why three phase is having 440v instead of 660v?

4 Answers   C&S, NTPC,

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What is rotating transformer? Which machine is used specifically as rotating transformer?

3 Answers   TATA,

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The armature of shunt dc motor has 0.8ohm resistance and motor is to run on 120V circuit.If motor is suddenly thrown on circuit while armature at standstill then current drawn by motor will be??Also back emf in normal running is 110V

2 Answers  

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How can one connect three source of electricity in a house..the source are 2 gen and one electricity.

2 Answers   SAUDI ARABIAN BAYTUR, Wantro Technical Services,

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What are safety seals?

1 Answers   HSL,

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which type of material is used for making motor encloser

3 Answers  

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Do we really need wheels for the transformer

1 Answers  

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What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

0 Answers  

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why dc motor runs slowly when dc supply is given?

2 Answers   L&T,

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why the transformer neutral give to the earth ?

2 Answers   Jindal, JLL,

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