Rockwell Automation 2092-DAx Ultra1500 User Manual - Manual (Page 22)

Publication 2092-UM001D-EN-P — July 2005
1-10 Installing Your Ultra1500
IMPORTANT
If you are using the Allen-Bradley system sizing program,
the average speed and average torque data has already been
calculated and can be used in the above equation. If you are
not sure of the exact speed and torque in your application,
another approach is to look at the speed/torque curve for
your Ultra1500/motor combination and use the values for
the worst case continuous speed and torque.
IMPORTANT
Calculations are multiplied by a factor to compensate for
the power and loss elements within a power system. A
factor of 2.0 is used with a single phase system and a factor
of 1.5 is used with a three phase system. This factor should
minimize the effects of the secondary line voltage sagging
in the transformer during peak current periods.