- Description
WEG's W21™ Severe Duty High Efficiency motors are designed to meet or exceed all EPAct requirements for energy efficiency as defined by the DOE. The efficiency values are certified according to the DOE's regulations (Certificate of Compliance number CC029A).
W21™ motors meet the most demanding severe duty application requirements. These TEFC motors are all cast iron construction, with enclosures rated IP55 to handle wet and dirty environments. They are painted with WEG's own special system, using synthetic enamel alkyd resin paints, which exceed the ASTM B117 standard for salt spray test. The W21™ line is rated for 1.25 Service Factor up to 100HP and meet Design B (up to 100HP) and Design C (from 15HP up to 100HP) torque requirements. This line is rated for dual frequency and dual voltage (with reduced service factor) up to 60 HP. And the entire line is certified Inverter Rated for use with a VFD. This rating meets or exceeds MG1 Part 31 NEMA Specifications.- Applications
- Pumps
- Fans
- Crushers
- Conveyors
- Machine tools
- Milling applications
- Centrifugal machines
- Presses
- Elevators
- Looms
- Grinders
- Woodworking
- Cooling
- Packaging equipment
- Other Severe Duty applications
- Standard Features
- Efficiency Certification number CC029A according to US Department of Energy Regulations
- Three-phase, II, IV, VI and VIII pole, 60Hz
- Voltage: 208-230/460V, 200V, 460V or 575V
- 50/60Hz rated up to 60HP For 75HP and up, please contact your sales office
- Totally Enclosed Fan Cooled - TEFC (IP55) water tight and dust tight enclosure
- Squirrel cage rotor / Aluminum die cast
- V-ring slingers on both endshields (586/7 frame equipped with labyrinth tachonite seal as standard)
- Ball bearings are supplied as standard. Roller bearings can be fitted on 1800 rpm, 1200 rpm and 900 rpm motors on frames 404T and up as a stock modification
- 1045 heat treated and stress relieved carbon steel shaft (4140 for roller bearings motors)
- NEMA dimensions
- Class "F" insulation for all frames
- Temperature rise: Class "B" (80ºC)
- NEMA ratings design "B" (Design B torque rating on nameplate can be re-plated for Design C)
- 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
- F1 mounted T-Box F2 mounting capable
- Stainless steel nameplate AISI 316 with laser etching
- Paint: Synthetic enamel alkyd resin base (exceeds ASTM B117 salt spray test)
- Color: RAL 5009 - Blue
- Automatic drain plugs - pressure compensated
- Regreasable bearings, positive pressure lubrication system (frames 254T and up)
- Continuous flow class "H" resin insulation system
- Gasketed conduit box
- Roller bearing models available
- MGI Part 31 rating for use with VFD - 12:1 constant torque speed range Speed range 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' and 'D' flanges for all ratings
- Roller bearings on drive end available for all frames
- Special epoxy painting
- NOTES
Motors are nameplated Class I Div. II Groups B, C and D .
All motors are tested according to IEEE 112 std. - method ‘B’ or C390 CSA
All WEG motors are energy efficiency verified by UL in addition to the DOE.
