Answer Posted / arun

excitation is needed for the AC generator, it cannot be self
excited, so we need a dc supply to excite the field (pilot
exciter, field flashing etc.,), dc supply is given to the
slip rings of rotor through brushes. and then AVR (automatic
voltage regulator) also used to increase or decrease the
level of excitation given the field of the rotor,

what happened when we supply a dc current in dc motor?? can it worked properly?

1960

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Single line diagrams for star to delta and DOL starters.

2268

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What are the uses of lead compensator?

1189

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Why 9KV surge arrester having 7.65KV of MCOV?

1576

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why occ characteristics of generator is also called as magnatization characteristics ?

2139

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why Lightening Arrester Probe sharp at Top of telecom tower.

1567

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1994

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standard earthing rating for power line..

2132

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What is icu and ics in Acb and how many time icu or ics passes from breaker?

1559

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Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?

2177

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We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......

2193

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IN induction motor pf is increased using capacitors.what will be the effect on motor and system when very large capacitor is accidently installed and pf goes leading.

2152

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i need about 10 years of GATE solved papers in pdf format and even mock tests toooo

1676

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hi i have applied for lic of india south cenrtal zonal ,hyd. i didnt get hall ticket till now.let me know how can i get form internet

2007

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what is control supply rating of a machine

1991

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