Answer / rajesh babu

we cant use dc power in transformers.AS the transformer
works on the principle of MUTUALLY INDUCTION and according
to this principle induction of emf(STATICALLY) occurs in one
coil due to change in current in another coil.THIS WILL
,ONLY POSSIBLE WITH ALTERNATING CURRENT.

Answer / susanta mallik

acording to faraday's law of electro magnetic induction emf
produce in a coil when the linkage flux changes.as we know
dc supply gives a constant flux where ac gives a sinusoidal
varying flux.so the transformer does not works on dc.one
point we have to remember hare that f=0 for dc.then
xL=0.hense the inductor acts as short circuit and causes low
impedance as well as high current to flow in the transformer
which may cause it to burn

Answer / ankur yadav

yes we can use dc power in transformer but our arrangement should be such that we can vary power,coz transformer works on principle of inductance .means we should have a varying flux.

Answer / mithun manna

Yes .we can use DC power in case of transformer, but for that we need to apply high frequency DC voltage across windings that means there are high frequency on and off period for the applied voltage across winding. It should be on upto knee point of the B-H curve of the material . otherwise cord will saturate, and it will damage. And there flux eeseting option during off period.

Answer / meenakshi

basically, transformer consists of primary and secondary
windings of some turns.this winding can b compared vid an
inductor of some turns.so inductor vil allow dc to flow
through.if the input is closed ckt,current vil be flowing
which finally leads to core saturation.

Answer / charan

If i pass DC power in T/f means what will happen ??

the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?

0 Answers  

hi friends iam collecting details about motor,generator & transformer so send some web links to about motor,generator & transformer ,please help me .i need your help.thank u

4 Answers  

what is the difference between real and reactive power? and what is the importance of these

3 Answers  

66kv under ground cable how to layaing in ground any special case two ckt r runing

0 Answers  

why phase to phase voltage are 290 rather then 440?

1 Answers   Bosch,

how can i select the cable ratings

4 Answers  

In Delta connected capcitor bank, One bank failed due to some problem. Can we connect Open delta capacitor bank to 3 phase motor. The motor voltage rating is 6.6KV. IF yes what changes will happen?

1 Answers  

What are the effects to a distribution transformer rated 10Kv with ratio 10Kv/0.433Kv, 3phase 50hz for example but fed with power supply of 11Kv?

2 Answers  

How to calculat size of copper & aluminium ?

6 Answers  

what is the speed of electricity?

11 Answers   Bhel,

why permanent magnet generator have higher frequency of 400hz

3 Answers   Jaypee,

how we can calcultae the short circuit level for bus bar

0 Answers   Jaiprakash, Panorama Apparels,