Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 169)

Reference 10-7
Motor Output for
NEMA Design Designations
Polyphase 1–500 HP NEMA has designated several specific types of motors, each having
unique speed/torque relationships. These designs, along with some
typical applications for each type, are described below. Following
these descriptions are summaries of performance characteristics.
Figure 10.5 Typical NEMA Design A Speed/Torque Curv
Starting Current: High
Starting Torque: High
Breakdown Torque: High
Full-load Slip: Low
Applications: Fans, blowers, pumps, machine tools, or other
applications with high starting torque
requirements and an essentially constant load.
Torque
Speed