WEG W22 500S 400kW 6-Pole IE3 Motor

The WEG W22 500S 400kW 6-Pole IE3 motor provides 985 RPM shaft power for the very largest direct-drive pump and fan applications in the Saudi industrial market, delivering 3876 Nm of continuous torque. At this torque level, the motor is capable of directly coupling to the largest centrifugal pumps deployed in Saudi industrial infrastructure, including main seawater intake pumps for mega-scale desalination plants and crude oil booster pumps on major pipeline systems.

The Ras Al-Khair desalination and power generation complex—the world's largest desalination plant at its completion—represents the type of mega-infrastructure application where W22 500S 400kW 6P motors are deployed. Very large seawater intake pumps, RO high-pressure pumps, and post-treatment distribution pumps at facilities of this scale require motors that combine maximum reliability, long service intervals, and compatibility with sophisticated condition monitoring systems.

At 400kW and 985 RPM on a 380V supply, the full-load current of approximately 757A necessitates careful cable and switchgear engineering. However, the operational advantages of direct 6-pole drive without gearbox typically justify the additional electrical infrastructure cost. Razz Middle East's project engineering team provides complete motor control center (MCC) design packages including circuit breaker selection (rated interrupting capacity calculation), contactor sizing, cable sizing per IEC 60364, and protection relay coordination diagrams that address all aspects of large motor starting and protection.

WEG's manufacturing processes for the W22 500S include in-process quality checks at each major assembly stage: stator winding resistance measurement before and after VPI (vacuum pressure impregnation) treatment; rotor bar soldering joint inspection by dye penetrant testing; bearing housing bore measurement; final assembly torque verification for all bolted connections; and routine electrical testing per IEC 60034-1. This comprehensive quality management system produces consistently reliable motors that meet the demanding requirements of Saudi critical infrastructure applications.

The W22 500S 400kW 6P motor's footprint and weight (approximately 3700kg) require careful foundation engineering. WEG provides grout pocket foundation drawings and anchor bolt templates that facilitate motor foundation construction by civil contractors prior to motor delivery. Razz Middle East coordinates foundation design review with WEG's applications engineering team and can provide vibration isolation recommendations for applications where structural transmission of motor vibration is a design concern.