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Question
What is the formula for calculating transformer Efficiency?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Output Power/Input Power*100 
Is This Answer Correct ?    10 Yes 1 No
Hcnaidu
 
Answer
# 2
%eff=(output power)/(input power)
=(output power)/(output power + total losses)
=(output power)/(output power + iron loss + cu loss)
 
Is This Answer Correct ?    2 Yes 1 No
Bhavana
 
 
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
What is different between Regulator & Stabilizer?   5
What is the difference between Surge protection device and Lighting arrester?   6
What will be the average KVA rating of Auto Transformer for 75kw 415V , 3phase induction motor   2
how can we charged the battery in DG MTS 2
what is the design factor that affects the size of a motor ? Reliance 3
Is it mandatory statutory requirement of transformer oil filtration annualy despite oil is withstanding required dieelectrical strenth and all others parameters   5
what is pressure relief valve in D.G ?state its function?   3
in transformer the unit of power is in kva why? Videocon 4
if 40 watt bulb has higher resistance then a 100watt bulb then according to joul farmula p=I^2R the 40 watt bulb more power consume then 100 watt bulb.   5
transmisancy eficencey calculation formula   1
What are the types of TESTS in CIRCUIT BREAKERS based on Testing and commissioning?   2
A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........   1
 
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