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» Home » Products & Services » Electric Motors » NEMA Standard » W22 High Efficiency Motors

W22 High Efficiency Motors
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W22 High Efficiency Motors

Since January 2017, IE2 motors placed onto the EU/EEA and rated at 0.75kW or above, must be used with a VSD unless their design falls outside of the scope of the EU Regulation or their final use will be outside of EU/EEA


High performance with maximum energy efficiency is the goal of the new WEG electric motor. High efficiency and Low cost of Ownership throughout the entire motor lifetime have been the basis for the W22 development. A design created to maximize performance and energy savings.

New Cooling System

Redesigned to provide improved air flow through all motor frames keeping low operational temperatures and assuring reliability and extended lifetime. The aerodynamic design of the fan cover increases effective airflow, thus minimizing
losses due to the recirculation of air between fan and fan cover. The fan was designed to provide strength and reduced noise level. Motor terminal box and eyebolts were repositioned on larger frames to allow better airflow.
The new W22 cooling system also contributes to:

  • Cooler bearing temperature extending relubrication intervals
  • Lower Noise Level fulfilling the most demanding Health & Safety regulations
  • Lower Overall Operational Temperature resulting in longer life
Terminal Box
  • Increased internal space making connections more accessible to the user resulting in an easier cable handling and connection
  • Terminal box can be mounted on top, left or right site of the motor using the same frame on the 447T and larger motors. Top mounting is optional on smaller frames
Exclusive Bearing Sealing System
  • extends motor lifetime when operating in aggressive environments by protecting the motor against water and dust guaranteeing proper degree of protection

Motor feet are solid providing a more resistant structure against vibration. The frame design has points that can be used as provisions for vibration sensors as a standard feature.
Benefits from the new frame design:

  • Motor temperature reduction
  • Eyebolts repositioned - easier handling in the application
  • Provision for vibration sensors - frame and endshields with provisions 90° displaced according to maintenance technical recommendations. Easier and more reliable vibration analysis
  • Solid feet - Enhanced reliability when operating on high vibration applications and also provide easier alignment on installation
Typical Applications
  • Pumps
  • Fans
  • Crushers
  • Conveyor belts
  • Mills
  • Centrifugal machines
  • Presses
  • Elevators
  • Packaging equipment
  • Grinders and others
Standard Features
  • Efficiency Certification number CC029A according to US Department of Energy Regulations
  • Three-phase, 2, 4, 6 and 8 pole, 60Hz
  • Voltage: 208-230/460V
  • No derating for 50Hz operation up to 60 HP. For 75HP and up, please contact our sales office
  • Totally Enclosed Fan Cooled - TEFC (IP55) water tight and dust tight enclosure
  • Squirrel cage rotor / Aluminum die cast
  • WSeal® sealing on both endshields from frame 364T/5T up to 504/5T (586/7 frame fitted with Taconite Labyrinth as standard)
  • Ball bearings are supplied as standard
  • 1040/45 heat treated and stress relieved carbon steel shaft (4140 for 404/5T upwards in 4, 6 and 8 pole motors)
  • Class “F” (ΔT = 80K) insulation for all frames
  • Continuous flow insulation system with class “H” wire
  • Temperature rise limited to Class “B” (80K)
  • NEMA ratings design “B”
  • Service Factor: 1.25 up to 100HP 1.15 from 125HP and up
  • Continuous duty (S1)
  • 104ºF (40ºC) ambient temperature
  • Altitude: 3300 ft (1000m
  • NPT threaded terminal box
  • Stainless steel nameplate with laser etching
  • Paint: Synthetic enamel alkyd resin base (240 hours minimum ASTM B117 salt spray test)
  • Color: RAL 5009 - Blue
  • Fitted with closed rubber drain plug
  • Regreasable bearings, With grease fittings in DE and NDE bearings
  • Gasketed conduit box
  • MGI Part 31 rating for use with VFD - 12:1 constant torque speed range up to 250HP and 4:1 above 250HP. Speed range with constant torque can be extended with optional Blower kit
Optional Features
  • Special voltages
  • Specially designed shaft
  • Space heaters (standard on 586/7 frames)
  • Labyrinth tachonite seal available for all ratings
  • Thermostats or RTD's (PT100)
  • Additional terminal box
  • Drip cover (canopy) for shaft down applications
  • Cable glands
  • C Face and NEMA D flanges for all ratings
  • Roller bearing models available
  • Special epoxy painting


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