Input from nameplate and load calculator

Converts loaded shaft output to electrical input through efficiency.

Units

P_{\text{input}} = \frac{\text{Nameplate}_{\text{HP}} \times 0.746 \times \mathrm{LF}}{\eta}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

P_{\text{input}} = \frac{50 \times 0.746 \times 0.75}{0.92} \approx 30.408

Symbol	Meaning	Unit
$P_{\text{input}}$	electrical input	kW
$\text{Nameplate}_{\text{HP}}$	rated shaft horsepower	HP
$\mathrm{LF}$	actual load factor	—
$\eta$	motor efficiency at operating load	—

Symbol	Meaning	Unit
$P_{\text{input}}$	electrical input	kW
$P_{\text{rated}}$	rated shaft power	kW
$\mathrm{LF}$	actual load factor	—
$\eta$	motor efficiency at operating load	—

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.