what is the speed of electricity?

11 Answers   Bhel,

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What is the purpose of taking Capacitance and Tan Delta Test in Transformer bushing?

1 Answers  

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hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

0 Answers   Bhel, CVL,

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HOW WORK HEAT PLATE EXCHANGER

0 Answers  

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IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

6 Answers   MacLellan,

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why excitor coil of an alternator can fail

3 Answers  

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A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

0 Answers   VECL,

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What is different type of Electrical curve and how it protects the equipment's while up-normal situation?

0 Answers  

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why the check zone and main zone are used for Busbar Protn. scheem?

0 Answers  

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what are the types of Distribution transformer vector group please explain

7 Answers  

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WHAT IS THE FUNCTION OF PULSE TRANSFORMER IN DC DRIVE

5 Answers  

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why effective resistance should be more than static resistance in transmission line?

0 Answers  

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