To determine the Healthiness of Insulation we will be performing Dielectric tests i.e Insulation Resistance test, Partial Discharge test,Switching Impulse, Lightning impulse, Tan Delta test ...etc why we required to perform this many test, why cant we do only one test. for Transformer, CT's

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Details about Flux Compensated magnetic Amplifer starter for motors

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hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

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why we need the starters for motors

1 Answers   L&T,

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What is the name of process In VFD frequency are increase then voltage increase & frequency decrease then voltage decrease?

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what is GRR(Grid Rotot resistance)?Why it is used beside of LRS?

9 Answers   ACC, L&T, Sri Biotech,

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neutral,ground & earth different b/w

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what gas is present in incandescent and florescent bulbs

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How to calibrate or test an LT Air Circuit breaker 440 volts, 35 KA, 800 Amps ?

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Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.

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Which transformer is suitable for 220/11 kV, 60 MVA, distribution , Y-Y or D-Y or Y-D, give comparison for the same.

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Why we apply only reduced voltage to the alternator while conducting slip test ? also the current increases to a larger value with reduced voltage itself Why ?

1 Answers  

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