How many amps does a 15kw 230v 3-phase heater draw?

Answer 1

Watts equal amps times voltage, so Watts divided by voltage (120), = 125 amps. With 240 volts, the amperage would be 1/2 or 62.5 amps. Are you referring to a 1500 watt heater? In that case it would be 12.5 amps at 120 volts.

watt divided by voltage gives the current

in that case it is 15*1000w/240v gives 6.25A when the power factor is unity.

I=W/V*pf

The above math is wrong. 15kw = 15000 watts. Therefore 15000 / 240 volts = 62.5 amps. If the voltage is 120 volts then the amperage would be 125 amps. For consideration; A 15000 watt generator (15kw), is capable of supplying 125 amps at 120 volts or 62.5 amps at 240 volts.

Answer 2

You need to determine the line voltage and the line current. The 230 V quoted is a phase voltage, and the line current is 400 V. You then use the equation: P = 1.732 x line voltage x line current x power factor, for a balanced load. In this case, for a resistive load, the power factor is unity (1).

So, in this case, to find the line current, we divide the power by (1.732 x line voltage x power factor), which works out at:

line current = 15000/(1.732 x 400 x 1) = 21.28 A

Answer 3

You will find that answer on the name plate of the water heater. Everyone is different and you should all way check the manufactures specifications.

Answer 4

15000W divided by 230V = 65.21Amps but you have to take other factors into account.

Answer 5

The equation you are looking for is Amps = kW x 1000/1.73 x volts x pf. The power factor will be 1 on an electric heater.

Answer 6

30