Answer Posted / kg

50 and 100kvar

Which material is used for the core of a transformer and why?

609

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block diagram of 2 ups system connected in hot stand by mode?

7495

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could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?

1592

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What type of DC motor would you see for a lift?

651

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what is doid

2312

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If short circuit ratio is high is it bad or good for a machine then tell the reason...

1606

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What is miller crystal oscillator? Explain its operation?

684

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Why are iron cores in transformers made laminated?

670

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what is the IS foe lightning arrester?

1690

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What is the loss of power of transformer 220kv/33kv,63/80mva of % imp12.05 at 80%load

1401

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what is the k var ratting of 1250kva

1517

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neutral earth resistance testing is it possible for transformer while in load condition

1456

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why the NGR (neutral grounding resistor) always OFF during DG off?

3077

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How to calculate VA rating for CT or PT or Control Transformer?

2345

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We are preparing another project which involves Waste heat recovery from a 1 MW GE Engine. The Engine in particular gives out flue gas at 487Deg C with a flow rate of 5650 kg/hour and this can be cooled to 180 Deg C. This gives a thermal output of ~ 594 KW that is available for input to VAM via heat exchanger / boiler. Additionally 581 KW will be available from engine jacket water (temperature profile 80/ 80 Deg C and a flow rate of 50m3/hr) Our estimation is that 300 TR of cooling is possible with a suitable VAM machine(s). Please advise what is the most suitable arrangement with maximum TR and min Capital expenditure. plz reply me as early as possible

1504

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