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 most of the modern day type electrical appliance have 2 pins rather than 3 pins?

4 Answers  

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how calculate busbar size for rated amps, which formula use

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What is meant by Load Encroachment in OHL Feeder Protection?

0 Answers  

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What is best method of Calculating Short Circuit current in power system network.

1 Answers  

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1amps current equal to howmany electrons to be flowed?

1 Answers  

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What is the thumb rule for calculating the P.F correction Capacitor?? Say for 100 hp motor how much micro farad Capacitor is needed .... Thumb rule so quick answer wanted

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What are the section criteria for cables. Now everywhere XLPE power cable is used or PVC is also used?.

0 Answers   DAE,

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what is sevice settings for mccb?How can be it setted?

0 Answers  

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what is power factor?

3 Answers  

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In a 11000/440 V transformer, when any one phase of 11 KV supply fails (ie., single phasing), what happens to the secondary voltage and why?

3 Answers   Secure Meters, TCS, Torrent Power,

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how can we measure the import power and export power in the same line?

1 Answers  

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I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

0 Answers  

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