In Ferranti effect,Receiving end voltage is greater than sending voltage,why? can anybody tell me the answer15 38801
hi friends i m from electrical branch and seeking for tech. + apti. both papers of hpcl plz get it available as soon as possible794
why DC current not used in Transformer action?17 14133
what is buchholz relay?what is it used for?8 23694
A 25MVA 3300/400V T/F is termed as per winding is …… a) primary 3300V & Secondary 400V b) primary 3300V & low voltage winding 400V c) High voltage winding 3300V & Secondary 400V d) High voltage winding 3300V & low voltage winding 400V4 3241
Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F8 10674
Resistor switching is used in which type Circuit Breaker ? a) oil filled CB b) Air blast CB c) Gas filled CB11 21421
In EHV tranm. The conductors are …….. a) Cu roads b) Cu bars with Si c) Cu tube with Si plate2 3310
the max. power will be transferred if …… a) sending end vol. is high b) receiving end v is high c)…….. d) corona loss is least2 3135
Moving Iron instruments are applicable with a) DC only b) AC only c) DC & AC14 10257
. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero1 1313
The temperature rise in the sys, which leads to ….. a) Increases stress& length b) increases stress but decreases length c) Decreases stress & increase length d) decrease stress & length1 2059
According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor994
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