Answer / kalyan

condition for max efficiency of 3-ph transformer,when core
loss=cupper loss.
condition for max efficiency of d.c.motor,back e.m.f=supply
voltage/2

Answer / manoj tyagi

for electrical machines max. eff.
veriable ohmic losses=constant core loss

why the value of impedence is taken as %impedence in fault currrent calculation

1 Answers  

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Why the meters sonnected to metering core of CT are not damagedon event of a fault??? Explain the phenomena??

1 Answers   Schneider,

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how to reduce the initial starting amps which is equal to the running load amps

3 Answers  

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sir , what happen if we decrease ( approx 3 inch ) the lenth of shaft in 110KW Induction , three phase motor. actually a 110KW motor is couppled with star couplling to 120TR compressor. When we doing maintenance in compressor it is required to skid the motor backword and resulting dis- alightnment . so we want to change the tyre coupling in place of existing coupling. so it is required to cut off the rotor aprox 3 inch form driving side.

2 Answers  

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why occ characteristics of generator is also called as magnatization characteristics ?

0 Answers  

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how freewheeling diode improves the powerfactor

0 Answers  

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How i can select current transformer and meters for the upgrading the panal..for 200kw to 600kw....i need to select monitoring and protection ct,s and apmpire meter ,kw meter too.

1 Answers  

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what are the methods of speed control of dc motor???

4 Answers  

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why transmission is only 3 phase and not 2 or 4 or poly phases

0 Answers   Infosys,

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Is it any dc fuses availbale in market? can we use one fuse for both AC & DC ?

6 Answers  

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solor panels arrange some angle,panel is flat fitted energy was produced or not why?

0 Answers  

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what is the avr

6 Answers   ArcelorMittal, Heidelberge Cement,

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