pls send previous bhel electrical papers

0 Answers   Siemens,

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How to calculate loses in transformer of 160 KVA ?

0 Answers   IDV,

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if we convert kw into kva,which one formula use by us,pls tell me?

19 Answers   ABB, AEC, BGH,

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what is a reactive power? what is the relation with power factor?

0 Answers  

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what is hysteresis loss?

4 Answers   PSU,

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A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

0 Answers   Blue Star,

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what is distribution board?

0 Answers  

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what is the sweep commenly used 1200mm sweep and 600mmsweep please tell me breifly sweep

1 Answers   Khaitan,

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Can you use a different size cable to complete a circuit if you run out what you are using?

2 Answers  

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how tto ingress mw in turbine explain.procedure ?

0 Answers   Power Grid,

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Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

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why surge suppressor in vaccum circuit breaker and it is only in motor feeder why not in tranformer feeder?no surge suppresor in ocb in motor feeder?

1 Answers   IOCL,

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