NEMA Standard High Starting Torque, High Slip Three-Phase Asynchronous Motors (Design D) feature F-class insulation and have a protection class of IP54 (IP55). The service factors are 1.0 and 1.15. The voltage levels are 230/460/796V, with a frequency of 60Hz. The operating temperature range is -15~40°C, and the altitude does not exceed 3300 feet. These motors are particularly suitable for driving equipment like oil pumps, which require high starting torque and soft starting characteristics.

This series of motors can be specially manufactured according to user requirements.