Answer Posted / kirti

we use 2 core, one '+' & one '-' as we all know. there is
no meaning of providing earthing in d.c as protection can't
be given by earthing in d.c.

How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?

4044

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What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

1447

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BSNL TTA EXAM QUESTION

2171

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What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

1950

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while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends

2846

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why electron produce magnetic field when it is in motion?

2139

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State any two nuclear power stations in India, with their generating capacity.

1870

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why sometime we get electrical shock while touching the ballon of dish tv connection ? which we should not get.

1978

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what is control supply rating of a machine

1974

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please send me previous year questions of jspl through which i could prepare myself for the test.

1871

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HOW TO CALCULATE THE REGULATION OF 100 AND 25 KVA TRANSFORMER

1969

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what is PWM in IGBT and how it works for drive.?

1651

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10 Mtr Hight of Lighting Arrestar how much area coverd??

2486

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What are the temperature elements?

1215

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What is the suitable transmission voltage?

1057

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