Answer / birinchi narayan borua

dc exicitation through slip ring is used to get uniform
sinusoidal magnetic flux in the rotor winding which will
lock with the sinusidal magnetic flux of the stator
winding, and hence rotate with synchronous speed.

Answer / dipen

by giving the Dc excitation it will create imagenary
poles to lock the stator pole so that syn.motor run at
syn.speed.

is there any difference between protection C.T and measuring C.T?if yes then what is the difference?

4 Answers   BARC, Century Rayon,

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Why  we are always  only used 11 kv.  , 22 kv ,33kv      in transmission line? Why not use 25,  55 ,65 kv ?

3 Answers   Khidmah LLC, Precision Camshafts Limited,

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what about the input current fan when regulator regulates to speed low?

1 Answers  

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1.What is wind span ,wight span and normal span, and what is the difference for 132kv transmission .

1 Answers   PKR,

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what is cogging and crawling

20 Answers   ABB, Ashok Leyland, Bharat Bijlee, BMRCL, MN Dastur, Siemens,

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In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

0 Answers  

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How does a transformer contribute towards the widespread popularity of ac system over dc?

0 Answers  

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Briefly describe your ideal job?

0 Answers   L&T, LPGCL, ONGC,

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what is the ohmic value of transformers

1 Answers  

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What is line resistance of cable & how it can be measured ?

0 Answers  

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1)what is hypo test. 2) which cable need to hypo test.3) when hypo test can be done before or after glanding.4) what is the purpose of hypo test.

5 Answers  

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What is the Powar consumption of fan low speed to full speed? is it same ?

3 Answers  

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