Answer Posted / rana_14march

I would like to go ABB compact Substation Unit but cost is
10 lackh per unit, and G.O.,D.O.fuse unit with pole
structure is about 5 lackhs.

please suggest which system we should adopt.

Define what is the function of anti-pumping in circuit breaker?

688

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

1447

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why starting current is high and resistance is almost 0 during the starting of motor dc motor...?

1279

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What is transient Phenomenon?

1773

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What is q factor?

664

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How to measure size of cable on a given load

1380

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Single phase and threephase power calculation

1650

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do we use links in a dc circuit?if so what s its use in it?

1492

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Refernce currents are to be generated using refernce cueernts how can this be done??

1565

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how to caculate cable size for diff types of loads? if anyone know the calculating procedure please tell me

960

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Why MCCB is Getting tripped sometimes when there is no load in the Midnight ?

1386

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we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

1628

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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.

1971

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i have some screw comprressor with 630kw power,i have established them with simple star to delta circuit,by the way there is so much inertia when the screw comprressors start, can you offer me contactors power with 400vac or any cataluge to choose the contactors

1399

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how line turns ratio changes in 3 phase with change in connection

1414

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