A variable frequency drive is an electronic device that allows you to start, stop, and control the speed of a three phase motor. It is also a motor starter as it is equipped with overload protection. Read more »
What is the difference between a 'new surplus' motor and a 'factory new' motor?
Our New Surplus electric motors and drives are new and unused overstock or discontinued items offered at lower prices and come with our 90-day warranty.
Factory New products are competitively priced and come with a manufacturers warranty.
Variable frequency drives (VFDs or inverters) now play an important part in major industry.
Within the last 10 years they have been perfected to control and vary the speed of 3 phase electric motors. They serve many purposes, besides speed control. Homeowners and hobbyist alike, who have lathes or milling machines with a 3 phase motor, usually don't have 3 phase power to operate. These VFDs (instead of using a rotary phase converter) can now be used to convert single phase power to 3 phase power. Read more »
Electric Motors
: Severe Duty and General Purpose: High Efficiency & NEMA Premium
: W22 NEMA Premium - Roller Bearings
Catalog Number: 20018ET3GRB447T-W22
WEG id: 11428921
Description
High performance with maximum energy efficiency is the goal of the new W22 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
Designed to provide optimized air flow through all motor frames keeping low operational temperatures and assuring reliability and extended lifetime. The aerodynamic design of the fan cover optimizes 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 are positioned 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
Large 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
Frame
Motor feet are solid providing a highly 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 positioned for easy 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, 4, 6 and 8 pole, 60Hz
Voltage: 208-230/460V
No derating for 50Hz operation up to 250 HP. For 300 HP 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)
Roller bearings are supplied as standard
4140 carbon steel shaft
Class "F" (ΔT = 80K) insulation for all frames
Continuous flow insulation system with Class "H" wire (364/5T and larger)
WEG submerged and bake system with Class "H" wire (327T and smaller)
Temperature rise limited to Class "B" (80K) @FL
NEMA ratings design "B"
Service Factor: 1.25 up to 100 HP 1.15 from 125 HP and up
Continuous duty (S1)
104ºF (40ºC) ambient temperature
Altitude: 3300 ft (1000m
NPT threaded terminal box
Stainless steel nameplate AISI 316 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
CLASS I, DIV. 2, GROUPS A, B, C & D:
T3 for 1.25 SF motors up to and including 404/5T frames
T3 for 1.15 SF motors up to and including L449T frames
T2C for 1.15 SF motors on 586/7
T2B for 1.0 SF motors on frames L449T and larger
These temperature codes are not valid for motors operating with VFD and/or with installed space heaters
CLASS II, DIV. 2, GROUPS F & G:
T5 for 1.25 SF motors up to and including 184T frames
T4 for 1.25 SF motors from 213T up to and including 404/5 frames
T3C for 1.15 SF motors up and including 586/7 frames
T4 for 1.0 SF motors on frames L449T, 586/7 and 588/9
These temperature codes are not valid for motors operating with VFD and/or with installed space heaters
MGI Part 31 rating for use with VFD - 20:1 constant torque speed range up to 250HP and 12:1 above 250HP. Speed range with constant torque can be extended with optional Blower kit
Optional Features - Call Dealers for information on price and availability of optional features
Special voltages
Specially designed shaft
Threaded NDE shaft side for encoder assembly
Space heaters (standard on 586/7 frames)
Labyrinth tachonite seal available for all ratings
Thermostats or RTD's (Pt-100)
Additional terminal box
Drip cover (canopy) for shaft down applications
Cable glands
C-Face and NEMA D flanges for all ratings
C-Face fan cover for accessories or Double C-Face mounting
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