Answer / deepak

By increasing the frquency, we can reduce the size of
transformer (In air craft,size of tranformer are very small
as there frequncy is 400Hz)

Answer / vaijanath nirgude

by incresing flux density bcoz , flu density =flux/ area of
core

Answer / mrudang

what we require , if we want to increase the flux density

the core we are using is CRGO

and what about the voltage

Answer / usman

there is no such thing that by increasing frequency we can decrease size of transformer , size mainly depends on its rating but there is a way to make size smaller but not too smaller . one of the guy gave the right answer that by increasing flux density one can decrease size.
the formula which he gave is absolutely right
if someone is interested i can give him further elaboration.

Answer / j.vinothkarthick

by increasing the frequency ,size decreases.but can anyone
help me how it happens nu?pls!!!!

Answer / mariappan k

increasing the frequency up to 400Hz,we can decrease the
size of transformer.we get 400hz by changing the poles in
generator also called rotary converter

in an ac series circuit there are 30 bulbs are connected in a serial set.what will happen if one bulb is fused and we removed the bulb and reconnect with the remaining bulbs? (29 bulbs). will the brightness of other bulbs increase or not?

3 Answers  

why rotor winding in induction motor is not earthed. normally we uses star winding in rotor .why?

3 Answers   Anglo Platinum, TATA,

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

0 Answers   US Electrofused Minerals,

VCB in closed position during opertion if vaccume break then what will happend? it has any protection ?

1 Answers  

When we getting shock, its we getting from voltage or Current.

14 Answers   Juniper Networks,

What is the problem, if a circuit breaker is not closing.

4 Answers   KSEB, L&T, Siemens,

Total power capacity of india at present

8 Answers   Bhel,

what will happen if a 3 phase motor is connected to a single phase circuit and vice versa?

3 Answers  

You are of electrical field and you are going for software? Why

0 Answers  

PLZ sent the previous year question paper for GET in NHPC on my EMail id ppshanker@gmail.com

0 Answers   NHPC,

During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections

1 Answers   Private,

How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?

0 Answers