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Question
What is the amount of no load current of 630 kVA tranformer 
voltage ratio 11kV/440V ?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
The No load current depends on the Core grade used in the
transformer laminations & the flux density at which it
operates,
a) 1-2% in high quality materials
b) 5- 10% in economy grades,
 
Is This Answer Correct ?    24 Yes 1 No
Satish Babu
 
Answer
# 2
dear satyendra it is no load current so wt is the use of
load????
generally no load current is 5-10% of rated value , but it
further depends on type of trformer 1 or 3 phase
 
Is This Answer Correct ?    21 Yes 3 No
Harish
 
 
 
Answer
# 3
No Load current will depend on Core Grade, Core Thickness,
Flux Density, Frequency and the quality of workmanship (how
good are gaps closed).
 
Is This Answer Correct ?    15 Yes 0 No
Dennis
 
Answer
# 4
The amount of no load current can be only calculated if we
knows the value of core loss of transformer and capacitance
current across the circuit.....
 
Is This Answer Correct ?    7 Yes 1 No
J.prabhakaran
 
Answer
# 5
frist we will get the rated current of the winding
I = 630 * 1000 / CUBIC ROOT OF 3 * 11 * 1000
I = 33 Amper
I NO LOAD = 0.5% OF I RATED
NO LOAD CURRENT = O.OO5 * 33
= 165 m A
 
Is This Answer Correct ?    2 Yes 1 No
Dr. Alaa Baiumy Abdel Azim &a
 
Answer
# 6
transformer no load current 630 KVA....1 hour unite
question
 
Is This Answer Correct ?    0 Yes 4 No
Nyi Lwin
 
Answer
# 7
it depend on the turns of coil what is the Gage of wire... 
Is This Answer Correct ?    0 Yes 4 No
Mash
 
Answer
# 8
Ctually No load Curent Depend on Transfarmer eficiancy To
take load.Depend on his Copper loss.
 
Is This Answer Correct ?    1 Yes 6 No
Amit Sonmale
 
Answer
# 9
it is a tricky question....

u know that when transformer is at no load. the secondry
windings are open...so that there is no current flow at
secondry winding...

and for primery winding we calcute these value from OPEN
CIRCUIT TEST.

that is mentioned in all books thats have transformer
chapeter...


GAURAV SRIVASTAVA (UNITED COLLEGE OF ENGINEERING AND
RESEARCH) ALLAHABAD
 
Is This Answer Correct ?    3 Yes 10 No
Gaurav Srivastava
 
Answer
# 10
630/19.05(11*1.732)=33.07amp 
Is This Answer Correct ?    1 Yes 14 No
Nilesh
 

 
 
 
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