why the neutral point of star connnection oscillates?

3 Answers   Avalon,

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what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.

0 Answers   ME,

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what is diffrence b/w -48vdc and +48vdc ?

1 Answers  

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I have a transformer whose primary operates at 230V, 50Hz for which the secondary voltage will be 12V, 50Hz. What will be the secondary voltage if the primary is fed with 400V, 8KHZ Signal?

6 Answers   ABB,

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How can make a star delta with Rstar delta feeder ( ( 4contactor & one timer ) pls answer with digram (power &control digram)

1 Answers  

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In liquid rotor starter how PH valve should be maintained.

1 Answers  

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What is Ton Capacity of Air Conditioner?

1 Answers   TATA,

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3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.

0 Answers  

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why we are grounding the neutral?

1 Answers   GE,

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given data are load current & power factor cable core size? plz any one update the calculation formula

0 Answers  

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ward lconard control

5 Answers   Bhel,

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In IDMT RELAY the term minimum (M) indicates what?

7 Answers  

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