Hi All!

I'm having trouble resolving for three phase power in a 600V 3 Phase delta system:

Using the Formula for total power in a three phase system with a field
measured 600V phase to phase and a field measured 30A per phase using a
clip-on ammeter.

Pt = 3Pa = SqRt3 x IL x VL x PF where Pa is power in one of the arms of the load

Using the above circuit measurments

Pt = 3Pa (3 x 30 x 600 = 54000VA)

why does Pa not equal using the ohter formula

Pt = SqRt3 x IL x VL x PF (1.73 x 30 x 600 x 1 = 31140VA) ??

Do I have to substitute 347 for 600 in the formula 3Pa ??

TIA

Fred

I'm having trouble resolving for three phase power in a 600V 3 Phase delta system:

Using the Formula for total power in a three phase system with a field

Pt = 3Pa = SqRt3 x IL x VL x PF where Pa is power in one of the arms of the load

Using the above circuit measurments

Pt = 3Pa (3 x 30 x 600 = 54000VA)

why does Pa not equal using the ohter formula

Pt = SqRt3 x IL x VL x PF (1.73 x 30 x 600 x 1 = 31140VA) ??

Do I have to substitute 347 for 600 in the formula 3Pa ??

TIA

Fred