Three Phase Open Motor – General Purpose, 1/4 to 450 hp, Cast Iron or Steel Frame, Inverter Ready

The General Purpose Three Phase Open Motor series is engineered to deliver high performance, energy efficiency, and operational flexibility across a wide range of industrial applications. Designed with Open Drip Proof (ODP) ventilation and constructed in cast iron or industrial-grade steel frames, these motors offer exceptional cooling capability and structural durability.

With horsepower ratings from 1/4 to 450 hp, this series includes Super-E® EM and CEM models that meet NEMA Premium Efficiency standards. These motors are fully inverter-compatible, conforming to NEMA MG1 Part 31.4.4.2, making them suitable for both direct-on-line (DOL) and variable frequency drive (VFD) applications.

Key design elements include an optimized internal airflow system that supports compact, high-power configurations, Class F insulation, and a 1.15 service factor for demanding duty cycles. The locked drive-end bearing enables versatile mounting positions, and models with the TR suffix are equipped with roller bearings to manage high radial loads from belted systems.

Whether installed in pumps, conveyors, compressors, or general plant machinery, these motors provide dependable service and energy savings in demanding environments.

Specifications:

– Motor Type: General Purpose Three Phase Open Motor
– Horsepower Range: 1/4 to 450 hp
– NEMA Frame Sizes: 48 to 449T
– Voltage Options: 200V, 230/460V, 460V, 575V
– Frequency: 60Hz (Standard); 50Hz versions for 2, 4, 6 pole motors (1–125 hp)
– Enclosure: Open Drip Proof (ODP)
– Efficiency Class: NEMA Premium (Super-E® models)
– Insulation Class: Class F
– Service Factor: 1.15
– Inverter Compatibility: Compliant with NEMA MG1 Part 31.4.4.2
– Construction: Cast iron or industrial steel frame
– Cooling Design: Optimized airflow for compact high-horsepower performance
– Bearings:

Locked drive-end bearing for universal mounting

TR suffix models include roller bearings for belted loads
– Conduit Box: Gasketed for improved environmental protection
– Warranty: 3-year warranty on Super-E® premium models

For further specifications or to inquire about this equipment and ReflowX's logistics services, Please contact ReflowX at info@reflowx.com