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 »
BLUE CHIP SERIES® SEVERE DUTY / AUTOMOTIVE DUTY MOTORS
NEMA PREMIUM® XRI® MOTORS IEEE-841
TOTALLY ENCLOSED, RIGID BASE, THREE PHASE
For extreme applications in the process industries such as chemical plants, pulp and paper mills, refineries, above-ground mines, food processing, foundries, and other severe duty environments where long life and ultra-high efficiency are required. Guaranteed efficiencies offer an eXtra return on your investment when using these premium efficiency motors on high cycle or long run time applications.
Factory New with manufacturer's warranty
Catalog #: W521A
Meets IEEE-841 standard for severe duty motor applications
Inpro/seal VBX bearing isolators on drive end extension for TENV and both ends for TEFC
Internal and external epoxy paint
MAX GUARD motor Class F insulation system
Precision balanced
Extended grease tubes
regreasable in service
Brass drain and breather
Meets General Motors GM7E-TA automotive duty
Meets IEEE45 USCG marine duty; API RPI4F for offshore platforms
Meets NEMA MG1-1.26.6 waterproof specification
Hazardous duty motor division 2 CSA certification nameplate
Meets temperature code T2B
Separately available C-Face Kit:: A183A
"C" Dimension: 19.63
Construction: CAST IRON
Inverter Duty: CT speed range: 20:1 CT
IP rating: IP56
C-Face addition may result in non-NEMA "BA" dimension. For new "BA" dimension consult Marathon catalog