Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / sunil kumar sinha
Transformer is an electrical device which transform power
from one voltage level to another voltage level. i.e
promary to seceondrt voltage level. It may be step up , may
be step down.
The transformer design is limited by two parameters : 1)
Voltage 2) current.
Voltage parameter decides the amount of insulation over the
coil/ windings to prevent interturn fault or earth fault of
transformer windings.Hence predetermined voltage level of
primary and secondary will decide the amount and nature of
winding insulation.
The second parameter is current which is responsible for
generating heat in the winding thus the transformer. If
transformer current is increased the heat loss will
increase and further heat transformer. The temperature of
transformer winding is controlled by cooling deviec of
transformer which is also predetermined and can restrict
winding temperature within its limit for a defined rise in
temperature. we all are well aware that rise in winding
temperature beyond given limit weekens the insulation and
results in failure of insulation, hence transformer.
due to above two reasons we must define the voltage level
and the current level of transformer. the product of these
two paramenter is VA or KVA, hence transformer is to be
rated with KVA.Power factor plays no role to limit the
transformer function, hence it is not rated in terme of
power.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
What is the function of electron gun assembly used in crt?
In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?
ACB & VCB how do work and saftes and how can maintenance in this and parts name show with picture
tell me about eletrical contractor
How can we measure the residual voltage in dc machines?
Anybody know how schematic diagram for reverse power relay? RPR for generator protection
I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....
Why PS class CT is always preferred for Differential protection?
what is the difference between interconnection and intraconnections in the circuit diagrams
how generator avr give to the input?
what is the transformer turn ratio formula and give some examples?
I am interested to know what does 15 KVA DG set actually means? If I dont know the DG rating, is it possible to identify KW by simply knowing the diesel consumption?
Is there any abbrevation for STUB in Stub bus protection
What is the formula of frequency ?
May I know how much values to be set for earth fault, over current and short circuit values at 11kv side? I have 11kv van 1250amps rating. Present it's taking load 80amps?
