TECO Weather-Protected Type I (WPI) Semi-Enclosed Motor (NEMA Standard)

As a specialized offering for sheltered industrial environments, TECO’s WPI semi-enclosed motor is fully engineered to comply with NEMA MG-1 standards and IEEE-841 specifications, integrating reliable weather protection, high efficiency, and robust performance. Certified as NEMA Premium (equivalent to IE3 efficiency) and DOE-compliant (certification code: ee CC002A), this squirrel-cage induction motor is tailored for North American medium-voltage applications requiring balanced protection and heat dissipation.

Adopting NEMA Weather-Protected Type I (WPI) semi-enclosed design with IP23 protection rating, the motor features protective screens on vents to block large particles and prevent liquids from entering at angles ≤15° from vertical. It utilizes IC01 self-ventilation cooling, paired with a high-quality steel frame for enhanced structural rigidity and thermal conductivity. The motor adopts a proven VPI insulation process, forming a dense insulation layer that boosts electrical strength and extends service life, complemented by F-class insulation and B-class temperature rise control.

Available in voltage ranges of 2300V/4160V/6000V/10000V and power coverage from 100HP to 3550HP, it operates at 60Hz with 4-8 poles, delivering synchronous speeds of 900-1800 RPM. Equipped with optional cast aluminum or copper bar rotors, it achieves low unbalance mass for stable operation and low vibration, meeting NEMA vibration standards. With a service factor of 1.15 and 160% rated torque overload capacity for 15 seconds, it handles heavy loads reliably.

This motor is widely applied in high-pressure water pumps, fans, compressors, mining equipment, and petrochemical installations, especially suited for sheltered outdoor or semi-harsh indoor environments. It supports horizontal mounting (IM 3011) and direct coupling drive, compatible with NEMA frame sizes 447VP-449VP. Backed by TECO’s Westinghouse-derived technology, strict quality control, and global after-sales service, it offers a cost-effective solution for enterprises pursuing efficiency, durability, and NEMA compliance.