Answer / pavan

The value of the NGR to be inserted in the cicuit can be
calculated by the simple formula

R = V / (√3 * I)

Where V is the System Line voltage in Volts
I is the value of the fault current to be limited in your
case it is 50A.

In general practice the fault current is limited to the
full load rating of the largest equipment available in the
system.

for selection of transformer we will considering 5 to 6 times of starting current of higher rating motor connected to secondary side. according to process wise we will start the motors gradually suppose if we will start 15 to 20 motors at a time wat will happen?

1 Answers  

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How is the air circuit breaker quenching the arc. If it is by air means, where is it come from?

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What are types of losses in the Transmisson Lines ?

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Hello friends, Can anyone explain the concept of zones in Bus bar protection and how can we differentiate the main zone and check zone in Bus bar protection

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why u want to work in sail/ntpc as u r already in an it company where life is good, good environment no much tensions etc?

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Tell me about yourself. ……………………………………. Why did you leave your last job? What do you see yourself doing five years from now? Ten years from now? What are your long-range career objectives? Why did you choose this career? How well do you work with people? Do you prefer working alone or in teams? How would a good friend describe you? What would your last boss say about your work performance? Why should I hire you? What makes you qualified for this position? What do you think it takes to be successful in a company like ours? In what ways do you think you can make a contribution to our company? What's the most recent book you've read? What two or three accomplishments have given you the most satisfaction? Why? Describe the most rewarding experience of your career thus far…………… Why did you decide to seek a position in this company? What can you tell us about our company? What do you know about our competitors? What two or three things are most important to you in your job? Are you willing to travel for the job?

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When are the directional relays used?

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what is oti and wti

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in what type of applications v can use q meter?

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What is UJT PNP, NPN transistor & working principles?

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why we maintain 50hz ,220volts,20Amp,ratings fixed every where in india,,electricity

1 Answers  

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What is Diff. btw Cat-5 & Cat-6 Network Cables???

3 Answers   Emerson,

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