Answer Posted / salah

Dyn11-secondary voltage lags primary by 30degree

Dyn1-secondary voltage leads primary by 30deg

hence it is not satisfying the condition for
pare;;alisation .

if we connect two TR in parallel current drwn form the
source by both transformer is not in phase hence
circulating current will produce & damage the winding as
well in secondary aslo

is ac supply can store

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HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

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i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

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Efficient electrical earthing in hard rock area

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WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

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