Answer / suresh

1. The main problem in the distribution is power factor.

* The main problem in distribution is Losses
* We cannot save the power, due to long distance the losses will be high.
*Due to natural defects in lightning.

Answer / sarmadahmed

Power Factor, I can understand but the other problems like losses and lightning is related to transmission right? Could you please tell me some problems like overloading, sparking, grounding etc.. I would really appreciate your help.

Answer / engr. shomaz ul haq

Some of the problems are:
1. A real transformer has series impedances in it so the
output voltage of a transformer varies wit the load even if
the input voltage is constant. This is solved by voltage
regulation.
2. Local variations in voltages. This is solved by transformer
taps.
3. Requirements of small changes in voltage which are too
costly to solve by a normal transformer can be solved using an
autotransformer.
And maybe some more.

Answer / simon

1. I2R losses
2.P=v*i. Losses

hello! can anyone explain to me how a 3 speeds table fan work? what are the factors that are controlling the speed of a normal table fan? Is it by varying the voltage or changing the magnetic field? would appreciate your reply :) thx in advance.

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