Nidec HW3V2E2 - The Stock Cooling Tower Duty Three Phase motors are designed for harsh operating conditions with high humidity in commercial and industrial applications such as cooling towers and evaporative condensers. They feature INVERTER GRADE® insulation exceeding NEMA® MG-1 Part 31 standard, Class F insulation, and a cast iron frame. The motors have double-sealed bearings, double drilled feet for flexible mounting, and meet NEMA® Design B performance. They are inverter compatible with a 10:1 variable torque speed range and are coated with CORRO-DUTY® motor paint for enhanced durability. The motors meet IP55 classification and have a 1.15 service factor.