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 »
WEG's CFW11 uses state-of-the-art technology to control motors
up to 600HP. Aimed at increasing customers productivity, the
CFW11 offers the following innovations:
Features
Factory new with 18 month manufcturer's waranty
Input Voltage: Three-Phase 380-480 Vac with Dynamic Braking Transistor
Motor Voltage: Three-Phase, 460 Vac
Motor Horsepower Normal Duty/Variable Torque: 7.5
Drive Amps Normal Duty/Variable Torque: 10
Motor Horsepower Heavy Duty/Constant Torque: 5
Drive Amps Heavy Duty/Constant Torque: 10
Dynamic Braking Transistor?: Yes
Dimensions (inches): 12.1 x 5.8 x 9.0
6% impedance DC reactor
Standard Features
Same programming as all other WEG VFD's
Plug and play philosophy (connect and use) enables quick and
easy installation of accessories and options.
USB for microcomputer connection for using SUPERDRIVE
programming and monitoring software as well as updating
inverter firmware.
Human-Machine Interface (HMI) with backlit graphic display
and soft-keys, greatly facilitates inverter programming and operation.
DC link inductors (symetrically connected to positive and negative DC link
terminals) enable compliance with IEC61000-3-12 standard requirements regarding harmonics,
(no need for external line reactance.)
Intelligent thermal management enables full protection of IGBTs, monitoring of heatsink and
internal air temperature.
Conformal coated circuit boards.
50°C Ambient
Automatic control of the heatsink fan with speed sensor (additional
protection) and easily detachable from the unit for cleaning and
maintenance.
Normal Duty and Heavy Duty ratings to adapt optimally to all kinds of loads.
Protection with failure and alarm warnings.
Motor overload protection in compliance with IEC 60947-4-2 | UL 508 C.
Memory card built into the standard product allows user to create functions
without the need to use an external PLC (soft-PLC via IEC61131-3
programming software)
Guided start-up simplifies initial user programming.
Real time clock with time and date stamped fault log.
TRACE / SCOPE function to assist with the start-up and system diagnostics.
SuperDrive G2 compatible
Optional Features - Contact Dealers for Price & Availability
Safety stop in compliance with EN 954 - 1/category III**
External control feed with 24 Vdc
RFI filter in compliance with EN 61800-3 (internal)**
DB Resistors and line/load reactors available upon request, call Dealers for price & availability
Applications
Pumps
Fans/Blowers
Conveyors
Compressors
Agitators and Mixers
Extruders
Grizzly Feeders
Centrifuges
Cranes and Hoists
Rollout Tables
Presses
Saws
Notes:
Normal Duty (ND) Cycle:
110% for 60 seconds every 10 minutes
150% for 3 seconds every 10 minutes
Heavy Duty (HD) Cycle:
150% for 60 seconds every 10 minutes
200% for 3 seconds every 10 minutes
Sizing the drive
The correct way to select a VFD is to
match its output current with the motor
rated current. However,
this listing also presents the expected motor
horsepower for each VFD model. Use the
motor power ratings only as a guide. ALWAYS compare motor FLA to Nominal AMPS of drive.
Motor rated currents may vary with speed
and manufacturer. IEC motor powers are
based on WEG 4-pole motors, NEMA
motor powers are based on NEC table
430-150.
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