




#23287  03/14/03 07:32 PM
Re: 50 kw motor?

Broom Pusher and
Member
Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA

As stated, ExI=VA, not W ("E"=Volts / Electromotive Force, "I"=Amperes / Intensity, "VA"=VoltAmperes / Apparent Power, "W"=Watts / True power).
To get the amount of True Power ("W") which is flowing within the Apparent Power ("VA"), you would need to know the Motor's Efficiency, in Percentage, or the Power Factor, in Percentage.
Here's some formulas (more can be found in the Technical Reference Area):
Find "I", when KW is known  for 3Ø systems of all voltages:
I = HP × 746 ÷ 1.73 × E × PF
To find KW:
KW = I × E × 1.73 × PF ÷ 1000
Key:
* I = Amperes, * HP = Horse Power, * E = System Voltage, * KW = Kilo Watts, * PF = Power Factor (in Decimal equivalent of known percentage), * 746 = Equivalent Watts to 1 Horse Power, * 3Ø = 3 Phase.
Good Luck.
Scott35 S.E.T.
_________________________
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!

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