Answer Posted / k.prakashchandra

In brief . Flux = K V / f . If the voltage increases or frequency decreases flux will increase when the other factor remains the same . That's why you can not give excitation unless the gen picks up at least 90 % of the rated speed in case of generator

we have 15 ampere variyac but we want 30 ampere variyac what we do

1923

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how we can do the insulation on secondary of ct explain and so that tan delta will within limit

1924

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why steady state stability limit is greater than transient stability limit ? How it can be explained ?

2909

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What is clock position of Transformer?what are the clock positions are there?and what is different of them?

3133

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How will be the single line diagram of series trip HT breaker? how it works?

2598

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What is the count of hvdc transmission lines in india?

1088

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what is the difference between capacitive and resistive voltage divider?

3520

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HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

1952

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Differentiate between ideal and non-ideal voltage sources?

1079

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How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

2133

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does a DG set has low fault level as compared to that of a transformer.If yes then why.

1976

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how choose conductor&depending upon load

1898

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what is relation between ct and pt ratio with multiplication factor of a energy meter? is there any other factor on which multification factor depend?

2330

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Why DG set is not installed in Terrace ??

1085

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in dc shunt motor if field winding is shorted then

1835

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