How much current can 11KV line carry? What are the formulae used to calculate

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 Posted / alishahbaz

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How much current can 11KV line carry? What are the formulae used to calculate current across both ..

Answer / arulkumaran

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 ?

80 Yes

20 No

How much current can 11KV line carry? What are the formulae used to calculate current across both ..

Answer / manimaranmuthu.m

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 ?

29 Yes

13 No

How much current can 11KV line carry? What are the formulae used to calculate current across both ..

Answer / suhailpro

Primary side voltage be 11KV,
Transformer's capacity= 1000KVA

Real power= Apparent*Power factor
KW=KVA*Power factor
if Power factor = 0.95
Power= 1000*0.95
Power=950KW
We also know,
Power(KW)=(root 3)*(KV)*I*Power factor
950=1.732*11*0.95*I
I(Current)= 49.7A

Secondary Voltage Be 433V
We know that,
Power(watts)=(root 3)*V*I*Power factor
Power=950KW=950000W
950000=1.732*433*I*0.95
I= 1333.4 A

Is This Answer Correct ?

9 Yes

7 No

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