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 |
DOES AN EARTH FAULT CURRENT ON THE DELTA SIDE OF A 6.6/33KV STEP UP STAR-DELTA CONNECTED TRANSFORMER REFLECT ON THE STAR SIDE? IF YES, THEN HOW AND WHAT IS THE AMOUNT OF CURRENT REFLECTED?
how capacitor control the power factor/
what is the reqirred voltage in HT motor to get full RPM on no load test?
What do you mean by dependent and independent voltage sources?
Advantage of earthing transformer
how much current will take for 1kw power. and what is the eqoutiion which is connecting with kw and A.
can i use 10 mfd + 6 mfd instead of 15 mfd capacitor in single phase motor as running capacitor
all the technical question with answers pleas send your email id ramar_eee@yahoo.com
How many no of flip-flops are required to get 16 bit counter
Why Neutral Isolation is required?
How much is the starting current for HPMV lamps. How many lamps can u wire in a circuit
In a panel 2500A ACB is the incoming breaker then what is the size of the bus bar?