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a distribution transformer(3 phase)supplying 440volt per phase.now suppose one of phase voltage(230volt) becomes zero.what will be the cause ?

3 Answers  

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how to calculate the capacitor to maintain power factor?

0 Answers   Bosch,

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what is the use of commutator in dc motor if we supply ac ? commutator is used to convert ac to dc.and it is used to arrange the flux in unidirectional in case of dc supply. if we give ac as supply to dc motor what is the use of commutator?

0 Answers  

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how to calculate the Neutral transformer impedance?

0 Answers   Schneider,

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If increased the frequency up to 1000 then what changes shows in voltage?

0 Answers  

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How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?

1 Answers   CMC,

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What is the difference between a Vacuum Circuit Breaker and a Load Break Switch?

7 Answers  

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what are the values of VRY,VYB,VBR,Vry,Vyb,Vbr,Vrn,Vyn,Vbn for Magenetic balance test of 100 KVA and 63 KVA Distribution transformer

0 Answers  

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how to calculate the no. of earth pits required for an electrical installation?

1 Answers   Mepax,

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how to find number of run for transformer & alternator secondary side? give the example.

2 Answers   Powergear, Regen Powertech,

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AVR is used for the Voltage regulation of the Generator using the feedback signal by exciting the field winding of the generator.But how the field winding will be excited & using what?

2 Answers   Alstom,

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What will happen if we give DC supply to AC motor?

9 Answers  

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