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How do you calculate how much current a 5 kilowatt motor draws if it is a 3 phase motor 400v?
Wiki User
∙ 15y ago
Power in a 3 phase circuit is given by W=√3*V*I*cosφ therefore transposing the formula gives: I=W/√3*V*cosφ where I=current in amps, W=power in watts, V=line voltage, cosφ=power factor (this should be on the motor plate, if not you could use 0.9) Regards ninenix
Wiki User
∙ 15y ago
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