What is the formula for calculating Transformer Losses &
Efficiency. I want to compare the Transformer efficiency at
different loading condition.
Answers were Sorted based on User's Feedback
Answer / kashifhabib
Efficiency = (Output/Input)*100
&
Output (KW)= KVA * Power Factor
Input = Output + Iron losses + Copper losses
Iron losses are due to Primary voltage so remains constant
can be calculated by open circuit test
Copper losses are due to secondary current I*I*R
can be calculated by short circuit test
Exp: Full load copper losses 800 W
1/2 load copper losses will be 200 watts
Is This Answer Correct ? | 368 Yes | 101 No |
Answer / vinod parasa
Efficiency = (Output/Input)*100
output=(x)(KVA * Power Factor)
input=(x)(KVA * Power Factor)+(X)^2 copperlosses+core losses
the volue of x depend on load
x=1 for full load
x=0.75 for (3/4)th load
x=0.5 for half load
x=0.25 for quarter load
copper losses are variable losses and iron losses are
constant losses.
at the time of full load copperlosses=iron losse
Full load copper losses 800 W
half load copper losses=(X)^2 copperlosses
x=0.5 for half load
=(0.5)^2 *400
=0.25*400
half load copper losses=200
Is This Answer Correct ? | 190 Yes | 85 No |
Answer / n.makali
POWER Transformer is 55MVA, 27/11.5KV ,efficiency =99.49
Find the Losses of Transformer
Is This Answer Correct ? | 89 Yes | 35 No |
Answer / s.ravi
Efficiency =
(Output/Output+Iron losses+Copper losses)*100
Iron losses = No load test,
Copper losses = Short circuit test
Regulation = (Impedance voltage/Rated input voltage)*100
Impedance voltage = Short circuit test(Voltage drop)
Is This Answer Correct ? | 59 Yes | 33 No |
Answer / prof dr lehaz kakakhel
go for two tests
open and short circuits tests
From the open, u compute the core power loss and from the
short, u get copper losses. then the formula is
efficiency = output/ (output + the above two losses)
SIMPLE
Is This Answer Correct ? | 36 Yes | 19 No |
How to improve insulation resistance of Motor
What is resistance of 50meters, 16sq.mm, single core copper cable?
why field winding in synchronous machine connecting in star position?
why we changed the polarity of DC generator ?
how much amp MCB is required for 1/2 kva power back up?
What do you mean by screen of power cables?
what is the electrical?
what happen if steam turbine trip,g.c.b not open and excitation off and on condition?
If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?
0 Answers National Insurance Company Limited,
In ac circuit R,L,C are connected in series what is the output the circuit? explain
How Can we calculate current carrieng capacity of Copper Bus-Bars and Alluminium Bus-bar
Will a bulb glow if we connect it between the phase and earth instead of earthed neutral?