Featuring BlueChip® quality 100% cast iron construction, IP56-rated NEMA Premium Severe-Duty Motors withstand harsh environments of cooling towers. Totally enclosed air-over motors include internal/external epoxy paint, sealed bearings, T-drains in endshields, drive-end bearing isolators with shaft slingers, and fully gasketed conduit boxes. Designed for 10:1 VT or 20:1 CT operation with VFD, 3-250 hp motors use MAX GUARD® Class F insulation and AEGIS® Bearing Protection Rings.