Answer / wareagle

Vipul Kumar your answer is wrong.

W is not = 1.732x380xI. W =1.732x380xIx PF. You left off
the power factor



Bala your answer is wrong also.

KA is not equal power/ (1.732*400*% of Impedance)Note
spelling of impedance. Where did you go to school?



Amps = 30 KVA/ (0.380 x 1.73)or 30000 va/380 x 1.73

Amps = 46

Answer / wareagle

simon says

30Kva=30,000va

30,000 VA=440V*68.1818 Amp*1 (Pf)

Hense Ka=0.068 Wrong



Simon if you look at the post, the voltage is 380 volt and
not 440 volts as you posted. Also you incorrectly forgot to

use 1.73 when working with 3 phase voltage.

Answer / simon

30Kva=30,000va
30,000 VA=440V*68.1818 Amp*1 (Pf)
Hense Ka=0.068

Answer / vipul kumar rai

W=1.732x380xI
30x1000=1.732x380xI
I=30000/658.16
I=45.581 ( FOR THE PRIMARY CURRENT )
W=1.732x220xI
I=78.731 ( FOR THE SECONDRY CURRENT )

Answer / bala

we need to know the Impedance of the TxR.Becos the Formula for Determine the KA value is
=power/ (1.732*400*% of Impedence)
For EX-
Power = 1500 KVA
Voltage = 400V
Impedance = 6%
short circuit = 1500*1000/(1.732*400*0.06)
= 36085A or 36 KA

What are types of central ac plants?

1 Answers   HSL,

What is the difference between ground and neutral ?

2 Answers   TCS,

When a 25kV line touches the train, will passenger get shock?

3 Answers  

what is the relation between the size of the machine and the frequency? (when the frequency increases the size of machine will increase,why?)

2 Answers  

What is the basic principle of welding process?

0 Answers  

What is meant by regenerative braking?

5 Answers  

What is vector group? What is meant by DYN11?Why is it needed?

13 Answers   Areva, Bhel, BRG, Escorts, Fortis,

what is the difference b/w earthing and grounding??

2 Answers   Dodsal,

Which fault is caused by lightening and thuderstorm a. Line to line fault b. Single line to ground fault c. Double line to ground fault

1 Answers  

Difference between on line capacitor and Station type capacitor

0 Answers  

what is the functioning of cvt in a substation?

2 Answers  

what happen if i connect DYn11 and DYn1 vector group transformer in parrallel?other things are same like votage ration,x/r ratiob etc...

4 Answers