Rpmee

= Speed of energy eff. motor

l790

For loads sensitive to motor speed

Above equations should be multiplied by speed ratio correction factor.

SRCF = Speed Ratio Correction Factor

( RPMEE y IRpMstdJ

Example:

x (100/91.7-100/95.0) = $904 S = 100 x 0.746 x 1 x 0.080 x 4000

$ 642 reduction in expected savings.

Relatively minor, 15 RPM, increase in a motor's rotational speed results in a 2.6 percent increase in the load placed upon the motor by the rotating equipment.

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