Calculating Current For A Contactor (3 Phase)

[irishsailor]

Lads

How do you work out the current on a 3 phase contactor, the motor is .80kw ??

I hope this makes sense

Chris

 

[Guest123]

An 80KW motor at 0.8PF will draw around 144A per phase.

Without any info on efficiency it's difficult to be more accurate.

 

[irishsailor]

Hi Lenny

sorry it is 800w motor

 

[telectrix]

0.8kW, i think he said.

 

[Guest123]

Missed the .

1.44A per phase then.

 

[telectrix]

that's approx 1kva. I = P/Vxroot3 = 1.44A

 

[irishsailor]

Many thanks lads