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Question
How much current can 11KV line carry? What are the 
formulae used to calculate current across both side of 
transformer? Moreover I need to know can I connect 33KV 
line with transformer of 1600KVA? Details are: V=415, 
Pf= .9
 Question Submitted By :: Alishahbaz
I also faced this Question!!     Rank Answer Posted By  
 
  Re: How much current can 11KV line carry? What are the formulae used to calculate current across both side of transformer? Moreover I need to know can I connect 33KV line with transformer of 1600KVA? Details are: V=415, Pf= .9
Answer
# 1
KW = KVA*PF
KW = 1600*0.9
KW = 1440
11KV PRIMARY CURRENT=
KW = 1.732*KV*I*PF root(3) = 1.732
1440 = 1.732*11*I*0.9
1440/1.732*11*0.9 = I
I = 83.98 AMPERE
415V SECONDRY CURRENT=
WATTS = 1.732*V*I*PF
1440000 = 1.732*415*I*0.9
I = 2226 AMPERE
 
Is This Answer Correct ?    8 Yes 2 No
Arulkumaran
 
  Re: How much current can 11KV line carry? What are the formulae used to calculate current across both side of transformer? Moreover I need to know can I connect 33KV line with transformer of 1600KVA? Details are: V=415, Pf= .9
Answer
# 2
11KV PRIMARY CURRENT[HT]:


KW = KVA*PF


POWER [KW]= 1600*0.9

POWER = 1440 KW

POWER [KW]=√3*KV*I*PF
root(3) = 1.732

1440 = 1.732*11*I*0.9

1440/1.732*11*0.9 = I

I = 83.98 AMPERE

415V SECONDRY CURRENT[LT]:

WATTS = 1.732*V*I*PF

1440*1000 = 1.732*415*I*0.9

I = 2226 AMPERE
 
Is This Answer Correct ?    2 Yes 3 No
Manimaranmuthu.m
 
 
 

 
 
 
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