Why only sinusoidal ac voltages are generated?why not triangular or sawtooth?

0 Answers  

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how hydrogen or helium is a cooling agent for alternator./ generator of big size.

1 Answers  

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why induction motor's p.f 0.8

0 Answers   Suzlon,

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a 3 phase slip ring induction motor is wound for 4 poles on stator and 6 poles on rotor; when 3 phase balanced voltage source at 50 hz is applied to motor it will run at a)1500rpm b)1000rpm c)750 rpm d)zero rpm

13 Answers   Essar, PSPCL, PSTCL,

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what is the kva rating of 20 kv transformer?

1 Answers  

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before synchronizing an alternator,power factor is leading ,why?

0 Answers   CUMI,

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State the points to be considered for selecting a particular type wiring.

0 Answers  

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What Different of Ht Side VCB & SF6

2 Answers  

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how do we calculate cable sq mm size,that if 50 A load

2 Answers   GTL, PowerTech,

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how to set time from star to delta starter

2 Answers  

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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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why firewall is build up between two transformer (220/11kv,50MVA)?what should be the firewall height?what is the clearance between firewall and transformer?

2 Answers   Siemens, Tous Stadt,

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