July 26, 2021 – Siemens’ latest offering in the low-voltage Simotics motor family is the SD200 severe-duty motor in frame size 440.

The SD200 motors offer 75-800 hp output and feature 444-5013 cast-iron frames for operation in 460V and 575V ranges. Promising high productivity and energy-efficient operation in all torque ranges, the cast-iron NEMA motors are built to power pumps, fans, compressors, hoists, winders and similar equipment in harsh environments.

Complementing the cast-iron construction are zinc-plated hardware, epoxy paint and stainless steel nameplates. An offset rotor bar provides improved efficiency, while larger bars and end rings reduce resistance, says Siemens. C5-grade steel laminations and copper magnet wire are standard.

The insulation system meets or exceeds NEMA MG1 2014 Part 31, making these motors suitable for VFDs (variable speed drives) in constant torque (4:1) and variable torque (20:1). All windings are tested for Corona Inception Voltage (CIV).