Answer Posted / devang

when flux change the voltage induced on secondary side so
we can not use the transformer as dc value step-up-down so
for constant value of square the output zero but the
transformer has the storage energy so the enery decrease
with time constant for high value of time constant the
square value possible but less value of time constant the
squre value not possible

Explain using drawings what is reverse PID action w.r.t PID controllers.

3449

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at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

1880

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what will be the min and max voltage flow from neutral to earth?

1524

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I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

2444

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Difference between earthing & grounding.?

2160

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What is CCT (Correlated Color Temperature) ?

1953

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What is the unit of attenuation?

1075

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how to calculate fault level?

2280

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WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .

2171

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what is doid

2816

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why connecting surge unit in contactor coil

1878

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WHY TERTIARY OF POWER TRANSFORMERS IS LOADED WITH EQUIPMENTS LIKE CT,PT,ISOLATOR AND CB

1906

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i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value

1940

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how do you test tachos and servos

2116

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What are the significant parts of dc generator?

1136

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