30 kVA and voltage 380/220VAC how to find out kA?
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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
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / simon
30Kva=30,000va
30,000 VA=440V*68.1818 Amp*1 (Pf)
Hense Ka=0.068
Is This Answer Correct ? | 0 Yes | 1 No |
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 )
Is This Answer Correct ? | 1 Yes | 3 No |
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
Is This Answer Correct ? | 0 Yes | 2 No |
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