Why does the phase voltage of two healthy phases become equal to the line voltage in case of an ungrounded neutral 3 phase star connected sytem when a single line to ground fault occurs ?

2 Answers  

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what happen if the secondry winding of the transformer is having less no of turns compare to the primery winding.

2 Answers  

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a induction motar has 30-35% exciting current at no load but in transformer it is only 2-3% ofbrated current why any reason?

1 Answers   century,

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what is the purpose of high speed earth switch in gas insulated substat

0 Answers   ABB,

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How is earthing done in Aerospace applications such as Flights and spaceships..?

1 Answers  

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why the vector group of excitation transformer is YD5(150 deg)how is this factor decided.

1 Answers  

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For Synchronisation of DG Sets Sometimes we people use NIC (Neutral Isolation Contactor) Instead of 4-pole ACB or any switchgerar..Please guide me why is it so????

4 Answers   Piramal Glass Limited,

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In ac motor,when dc supply is given what happend to the motor?

3 Answers  

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Why frequency fix in 50 Hz?

6 Answers  

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what is the difference b/c choke and ballast?

1 Answers  

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single phase for 230 then why three phase are 440 volt

4 Answers   ACIL,

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y we use neutral,all r told its used to for closed path..k its a just used to closed path,in a transmission line y we put same conductor used n both phase and neutral..if we use less than phase conductor in neutral mean we ll reduce cost its right r wrong..if we use mean any problem occur in transmission line..

0 Answers   ME,

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