Answer / guest

Eventhough altenators are associated with stability, still
we use alternators because of its inherent advantages.

1.when we are generating electricity from conventional
sources like thermal n hydal, the primemover input is in
our control so u can maintain constant speed. so we use
alternators because dese m/cs run at constant speed.


2. other advantage is powerfactor is in our control. By
changing the excitation we can control the power factor.

3.Cost is less when compared to same rated DC alternator.

To determine the Healthiness of Insulation we will be performing Dielectric tests i.e Insulation Resistance test, Partial Discharge test,Switching Impulse, Lightning impulse, Tan Delta test ...etc why we required to perform this many test, why cant we do only one test. for Transformer, CT's

1 Answers  

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why generation of electricity in low value voltage

3 Answers  

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what is the difference in using the 125% and the 250% factor of safety in calculating circuit breakers capacity for motors,which is more reliable to use the 125% or 250%??

1 Answers  

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I have 1500/1A CT If i connect this CT in 6.6KV bus bar means what will be the voltage present in CT?

0 Answers   KCL, MPC,

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why we use perllel conection system in the wiring?

4 Answers   Airtel,

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what is the meaning of TPN

2 Answers  

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tate and explain super position theorem

2 Answers  

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Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

0 Answers  

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what is the relation between frequency and inductive reactance in a d.c supply?

2 Answers   L&T,

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What is the use of Gateway RTU like ABB RTU 560 in power plant, SAS system ?

1 Answers   ABB,

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What is power factor?

3 Answers   L&T,

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which type your UPS on line,off line give the reason?

2 Answers   Roto Power,

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