Answer / meenakshi

DC TRACTION MOTOR WITH RHEOSTATIC CONTROLFOR VARYING THE
SUPPLY

Whats the purpose of neutral earthing?

5 Answers   Electrical, Hindalco, TCS,

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Compare salient pole and cylindrical rotor machines.

0 Answers  

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What are locations arc protection relay is fixed.

0 Answers   KSEB, L&T, Siemens,

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what is field flash

4 Answers   Bhel,

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What does impedance in the windings of transformer signify.

2 Answers   Johnson Controls,

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how to reduce earth resistance in sandy soil.

1 Answers  

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can we use existing 6300V alternator for generating 6600V by increasing excitation,what are advantages & disadvantages to alternator & motors of 6600V.

1 Answers   GMR,

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what is difference b/t ac current and dc current

4 Answers   L&T, Meghana Engineers,

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Why in ESP Positive earthed

0 Answers   Sonhira,

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why total tape position are odd in number in Power transformer ?

1 Answers  

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Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.

0 Answers   Piramal Healthcare,

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Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

0 Answers  

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