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Line reactors on VFD line inputs protect drives from current spikes and reduce harmonics. On VFD outputs, reactors or filters are recommended. For motor wiring up to 100 feet, a line reactor is acceptable; from 100 to 1,000 feet, an output filter is recommended.
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AC Variable Frequency Drives Accessories
Category Selection
AC Line Reactors
Input line reactors protect the AC drive from transient overvoltage conditions typically caused by utility capacitor switching. Input line reactors also reduce the harmonics associated with AC drives and are recommended for all installations.
These components are compatible with various AC drives (check specifications for selection).
Output Filters
Output line (load) reactors protect the motor insulation against AC drive short circuits and IGBT reflective wave damage, and also allow the motor to run cooler by "smoothing" the motor current waveform. They are recommended for operating "non-inverter-duty" motors, and for any motors where the length of wiring between the AC drive and motor is less than 100 feet.
For AC Drive-to-Motor wiring distances over 100 feet, use of the VTF series output filter is recommended.
Braking Units and Resistors
Braking resistors are used to increase the braking torque of the AC drive, for frequently repeated ON-OFF cycles of the AC drive, or for decelerating a load with large inertia. Braking resistors are compatible with various AC drives (check specifications for selection).
Larger AC drives also require that dynamic braking units be used in conjunction with the appropriate braking resistors. Braking units are available for certain DURApulse drives.
EMI Filters
Filters reduce electromagnetic interference and offer high performance for use in a variety of drive applications where long motor supply cable runs are necessary and where compliance with industrial noise limits is required.
Zero phase reactors, (aka RF noise filters) help reduce radiated noise from the inverter wiring and are effective for noise reduction on both the input and output sides of the inverter.
These components are compatible with various AC drives (check specifications for selection).
VFD Communications & I/O Modules
Option cards are available to increase the I/O or add communications capabilities. Modules are available for various DURApulse, Toshiba, IronHorse, and WEG drives.
Options include (check for compatibility with specific drives):
- Ethernet, EtherNet/IP, Modbus TCP, Modbus RTU, BACnet, and EtherCAT communications options
- Discrete input, discrete output, relay output,and discrete I/O combo modules
- Analog, relay/analog, encoder/analog, and temperature/relay combo modules
- STO module
- Multi-port Ethernet cards for select DURApulse and IronHorse drives
VFD Software & Accessories
Drive configuration and programming software (available as a free download or on USB) allows the user to connect to a VFD from a PC for fast, convenient setup and/or programming of a built-in PLC, and offline storage of (multiple) configuration parameters.
An assortment of accessories to complete your VFD installation includes:
- Conduit box kits that bolt to the bottom of a VFD to provide conduit entry and a/ NEMA 1 rating without the need to install in a separate enclosure
- Flange mounting kits to extend the heat sinks on the back of the drive through the rear of the enclosure
- EMC shield plates allow motor lead shields to be grounded at the drive
- NEMA 4X disconnect switch provides local lockout to the GS20X drive
- Remote keypads
- Bezels
- Cables
- Backup power supplies
- Memory modules
- DIN rail mounting adapters
- Potentiometer
- Replacement cooling fans
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