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 »
The WEG CFW501 series of variable frequency drives for heating, ventilation, air conditioning and refrigeration. was designed with the features and functions required for modern HVAC systems. The CFW501 is designed with the same reliability, robustness and energy-efficient control known in our industrial lines. WEG now brings this technology to office buildings, hospitals, airports, , hotels, shopping centers or other similar facilities.
CFW501 Features
CFW501 Ratings: ?-7½ HP @ 230 Vac; ½-25 HP @ 480 Vac.
Conformal Coated Circuit Boards - provides protection against dust, humidity, high temperature and chemicals
Plenum Rated - Meets UL94 Requirements
IP20 enclosure with NEMA 1 conversion kits available
Harmonics - Meets IEC 61000-3-12 requirements
No line reactor required
No restrictions for installation, no minimum line impedance required
Communications - BACnet MS/TP | Metasys N2 | Modbus-RTU native to the drive
Heat sink and internal temperature monitoring provides protection for critical components such as IGBTs and circuit boards
Fan operation is controlled based on the temperature of power modules
Reduces energy consumption when drive is not supplying power to the motor
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