Answer / sukhvinder

excitation means energiseing of rotor field by external dc
supply.

in lab almost both dc and ac are used.

how does calculate loss correction factor in transformer

1 Answers  

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Why motor initial starting current is high?

9 Answers   Pennar,

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What is the difference between Neutral And Earth ?

2 Answers   Ambuja, Reliance,

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Difference between ac parallel circuit and ac series circuit?

0 Answers  

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a. void main() { char a[6] = "INDIA"; while(*a) { printf("%c",*a); a++; } } 1. india 2. I N D I A 3. no output 4. error 5.Null

1 Answers  

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Off-circuit Tap changers in distribution transformer required

1 Answers  

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1 HP = how many kw

9 Answers  

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how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

0 Answers  

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why the earth pin in a 3-pin socket is longer and thickest?

5 Answers  

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derive DC RMS value for half wave rectifier?

0 Answers   BARC,

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

0 Answers  

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