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AC Drives: Choose a drive category below for a quick summary of the series
Electrical drives control the speed, torque and direction of a downstream device,
most typically a motor. Variable frequency drives (VFD) provide speed control
for AC motors such as those in conveyors, fans, pumps and shop tools. DC drives
provide variable speed control for DC motors, ideal for applications requiring
low-speed control, torque and power.
Broad offering from 1/4 to 150 hp Scalar, Vector Control (Sensorless and closed-loop with encoder feedback), and VVW PM (suitable for fan, pump and compressor)
200-240V (single-phase/3-phase and 3-phase only models) and 380-480V input voltage
230VAC: three-phase up to 30 hp, single phase input up to 3hp
STO - Safe Torque Off (TUV certified) with option module
460VAC: three-phase up to 150 hp
IP20 with NEMA 1 conduit box options (not required for NEMA 4X IP66)
Speed and torque control down to 0 (zero) rpm
Precision of 0.01% for speed control
DIN rail (35mm), A, B, and C frame, or surface mounting with screws on all frame sizes; Frame F and G frames can be flange mounted
Same programming as other WEG VFDs
0 to 500 Hz output frequency
2.5 to 15 kHz adjustable switching frequency (5 kHz standard)
PID with sleep mode
Flying start / ride-through
Built-in 24VDC power supply (max. 150 mA)
Built-in RS-485 (Modbus RTU) communication
Plenty of built-in I/O, expandable with option modules
Control features: Linear and "S" ramp acceleration and deceleration, local/remote control, DC braking, torque boost,
motor slip compensation, electronic pot, preset speeds, adjustable V/Hz profile, maximum and minimum adjustable frequency
limits, two skip frequencies, adjustable output current limit, JOG, ride-thru, flying start and PID regulator
Keypad with backlight, with main display line, secondary display line and bar graph display
CFW500 NEMA 4X drives are available with or without integral, locking disconnect
CFW500 NEMA 4X drives can operate AC induction or permanent magnet AC motors (PMAC).
The DURApulse GS20/GS20X series of AC drives includes many of the same standard features as our other GS
drives including dynamic braking, PID, removable keypad, and other features such as:
- V/Hz Control, Sensorless Vector Control, Field Oriented Control.
- Torque Control Mode
- 100kA short circuit current rating
- STO - Safe Torque Off
- Built-in PLC (up to 2,000 steps)
- Optional Ethernet communications Modbus TCP and Ethernet/IP
- Generous built-in I/O
- 2 Analog inputs, AI1: +/- 10VDC, 0-10VDC, 0-20mA/4-20mA, AI2: 0-10VDC, 0-20mA/4-20mA
- 1 analog output 0-10VDC
- 1 Frequency output
- 7 Digital inputs, 2 digital outputs, 1 relay output
- Zero-stack installation
- GS2 mode to ease with migration from GS2 VFDs (not supported on GS20X)
- GS20X adds NEMA4X enclosure and optional NEMA 4X disconnect
- Two-year warranty
- UL, CE listed
1-300 hp, 460VAC
The DURApulse GS4 series of AC drives includes many of the same standard features as our other GS drives including
dynamic braking, PID, removable keypad, and much more:
- V/Hz control or sensorless vector
- 100kA Short Circuit Current Rating (SCCR)
- 50℃ rating
- STO - Safe Torque Off (TUV certified)
- Built-in PLC (up to 10k rungs)
- Expanded I/O capability - 110V Inputs, Relay Outputs, combo DC I/O card
- Analog I/O - Configurable: 3 In and 2 Out
- Fire mode
- Circulatory control mode
- Field upgradeable firmware
- High speed communication interfaces with MODBUS RTU and BACnet protocols built in, with optional communication
cards: MODBUS TCP, EtherNet/IP
- Two-year warranty
- CE, TUV, UL, cUL
The ACN series of NEMA 4X sensorless vector AC drives bridge the gap between a micro drive and high-performance VFD.
These AC drives have features normally only found on more expensive drives, in a NEMA 4X enclosure and at a great price.
These drives offer an advanced remote keypad, Ethernet option cards so the drive can communicate over Modbus TCP and EtherNet/IP, and the option to configure and program using the free, user-friendly VFD Suite software.
ACNxx series drives support 4 control modes which include: V/Hz, slip compensation, sensorless vector and torque control.
230VAC: three-phase up to 20hp, single phase up to 10hp
460VAC: three-phase up to 30hp, single-phase up to 15hp
Single-phase UL Ratings - 230 or 460 VAC input
Can be used with AC induction motors or permanent magnet AC motors (PMAC)
Lockable, integrated disconnect or no-disconnect models
Output frequency to 400Hz (120Hz sensorless vector)
STO - Safe Torque Off (SIL2)
Built-in user sequence programming of 18 steps
Optional LCD text-based keypad can be remotely mounted with IP66 case
Local/Remote control mode selection or digital/comm input with Hand/Off/Auto control
Momentary power loss restarts
Analog I/O - configurable 2 Inputs and 1 output
Built-in dynamic braking
PID controller - including sleep and wake
High speed communication interfaces with MODBUS RTU built-in, with optional EtherNet/IP and ModbusTCP communication card
Fire Mode - Run fire mode during emergencies to have uninterrupted smoke removal and system pressure
- Significant energy savings can be realized in many fan and pump applications that previously used dampers or ON/OFF control:
AC drives allow motor speed to be fine-tuned to the process.
Reduce start up current
- controlling the inrush current at motor start-up allows the use of smaller fuses, and reduces electrical peak load.
Reduce mechanical stress
- controlled/smooth starting and stopping minimize mechanical shock and wear and tear on the system.
- Motors have very poor power factors (especially at light loading). Drives significantly increase power factor (even at light loading)
and can eliminate the need for power factor correction capacitors and/or utility power factor charges.
Variable Speed and integrated functionality
- AC drives can vary motor speed and direction by operator input (keypad buttons/speed control knob) or by digital and analog inputs
(from pushbuttons/switches/pots or PLC outputs). Basic machine control can sometimes be performed in the drive (limit switches/sensors
can be wired to the drive's inputs to control motor speed or direction).