2007-06-15 07:12:29 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The equations are slightly different for 1Ø and 3Ø.
For 1Ø applications: kVA ÷ kV = amps
For 3Ø applications: kVA ÷ (kV * √3) = amps
The voltage is the Ø to Ø voltage, not Ø to neutral.
Notice that the voltage is expressed in kV to correspond to the kVA units. Otherwise your calculations will be off by a factor of 1000.
2007-06-15 18:57:19 · answer #1 · answered by Thomas C 6 · 1⤊ 0⤋
If your supply voltage is 250 then multiply by 4.
k is the SI symbol for kilo (x1000)
VA is shorthand for volts x amps, and Power (Watts)=Volts x Amps. So one kVA is one kilowatt kW.
Why have alternative units for power (VA and W)? Well, in AC circuits there is power factor to consider, this is where the current and voltage go out of phase but for simple loads this can be ignored.
2007-06-15 11:13:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The simple answer is that you can't. kVA is a measure of power, whereas ampere is a measure of current.
That said, if you pick a voltage you can derive ampere by dividing kVA by voltage. Example:
1000kVA / 100V = 10kA.
In case you weren't aware, the lower case k means 'kilo' or 1000.
2007-06-15 07:32:16 · answer #3 · answered by Jan O 4 · 3⤊ 0⤋
Here is an on-line KVA to Ampere converter.
http://www.tvss.net/train/tools/05.htm
Hope this helps.
2007-06-15 07:29:19 · answer #4 · answered by Michael B 6 · 0⤊ 2⤋
Don't ask nonsenses.
2007-06-15 10:13:09 · answer #5 · answered by Anonymous · 0⤊ 3⤋