Electric Variable Frequency Drive (VFD) Tractors
The KET3000 Electric Variable Frequency Drive (VFD) Tractors are equipped with Knight’s proven tractor mechanics using a worm gear reducer that is reliable and maintenance-free. They provide a way to easily tow fixtures, bridges, and heavy loads in manufacturing environments, giving the operator complete control of positioning.
Knight’s VFD tractors have many programmable functions, as well. The KET3000 Series has a modular assembly design for easy installation and set-up.
Different configurations are available depending on the type of Knight rail you are using. The VFD Electric Tractor can also be configured to run on different manufactures’ rail systems.
Knight’s new “Power and Free” All-Electric VFD is a hybrid of the best of both the clutch driven and the pneumatic engagement style of VFD tractors. Combined with Knight’s patent pending ERail, it provides true power and free motion without the need for festooning.
General Information
+Features
- Maximum Speed: 180 ft. per min. [1.3mph].
- Maximum Towing Capacity: 3,000 lbs. [1,360kg].
- Integrated Load Trolley
- Dual Rubber Drive Wheels: rides on bottom of rail.
- Clutch Drive Wheel Engagement 24VDC
- Drive wheel is always engaged with rail (Over Center Clamp can disengage tractor if required).
- Pneumatic Drive Wheel Engagement
- Drive wheel engages rail when a forward or reverse command is received.
- All-Electric “Power and Free” Control Drive Wheel Engagement
- Drive Wheel is engaged only when a forward or reverse command is received.
- When the VFD is not receiving a command, it is free to roll along the rail, providing a true power and free traction option.
- Programmable speeds, acceleration, and deceleration rates.
- Standard Inverter Motor: 1/2 HP
- Standard VFD controller: FLA 6amps at 240VAC, Single Phase, for variable speeds on board.
- (2) Year Warranty.
- Over Travel Limits (ramps sold separately).
- Product Weight: Varies by each model
Benefits
- Provides ease of towing fixtures, bridges, and heavy loads.
- Ergonomically assist the operators when controlling the position of loads.
- Programmable functions
- Acceleration
- Deceleration
- Speeds
- Controlled start and stop.
- The Dual Rubber Drive Wheels provide positive traction between the tractor and the rail.
- Knight’s proven tractor is designed with a worm gear reducer, which is highly reliable and maintenance free.
- VFD tractors have a modular assembly for ease of installation.
- Produced with off-the-shelf electrical components.
Options
+Options
- End of travel shocks
- Pendant cables with tether
- Tow Bars
- KCA1020 Two Speed Pendant with Run-Stop Button.
- Wireless pendant controls package
- Over Travel Limits Ramps
- Optional Custom Tractors:
- Non Standard rail
- Nema 12 enclosure
- Complete fixture integration
- Combined with Knight Engineering VFD Tractors can provide:
- Return to home function.
- Wireless capabilities.
- Custom interface.
- Coordinated dual interface for large spans
- Coordinated with hoist
- Interface with other hoists
- Remote programming ports
Tractor Controls
+- Wireless Remote.
- Wireless Signal: Up to 900 ft. [300m].
- Ultra-Durable Nylon and Fiberglass Composite Enclosures.
- Up to (8) Eight Function/ Operation Buttons.
- (62) User-Programmable Channels.
- Automatic Channel Scanning Receiver.
- 32bit CRC and Hamming Codes.
- Reliable Push-Buttons. – Rated for more than one million press cycles.
- Power Consumption: (2) “AA” Batteries, 100 hours plus.
- Durable Construction.
- Compact and Lightweight.
- Custom Push-Button Labels.
- Improves Material Handling Operations.
- Low Power Consumption.
- KCA1004 – (4) Button.
- KCA1005 – (6) Button
- KCA1006 – (8) Button.
- Enables forward and reverse motion of the KET3000.
- Run-Stop button.
- Can be paired with the KCA1045 Pendant Cable Kit to tether to the KET3000 (kit sold separately).
Videos
+Electric VFD Tractors
![](https://i.ytimg.com/vi/QI-wSgvAi0k/hqdefault.jpg)
Accessories
General
+- Tethers the KCA1020 Pendant Handle to the KET3000.
- Relieves stress on the communications cable (5m).
- Includes:
- KCD1032 mount bracket
- 15 ft long cable
- (2) barrel clamps
- (2) wire thimbles
- Spiral wrap
- Limits movement of the KET3000 Tractor from within a predetermined work area.
- 2 required.
- Available in 24″ or 36″ options.
- Connects Knight’s KET3000 to a carriage trolley.
- Can be used trolley to trolley.
- Mounts inside of the RAD7510 Series Rail.
- Separates the working area of a bridge or runway and/ or prevents a bridge from over travel.
- Dampens the impact force of the load trolley striking the mid-rail stop.
- Located mid-rail to halt movement of a KET3000 Tractor.
- Shock Diameter: 1.00 in. [25.4mm].
- Shock Length: 8.06 in. [205mm].
- Shock Absorbs up to 141 ft. lbs. [192Nm).
- Inner MRAA7511 Mid-Rail Stop.
- Prevents an end truck or load trolley from exiting the rail.
Electrical Cables
+- 8-Pin Micro DC Single Key.
- PVC Gray.
- 90° Male / Female Connectors.
- 22 AWG, 4A, 300V Cord.
- Available with Straight or Right Angle Connector Ends.
- 4-Pin Micro DC Single Key.
- PVC Gray.
- Male-In-Line/ Female Connectors.
- 22 AWG, 4A, 300V Cord.
- Available with Straight or Right Angle Connector Ends.
- Electrical Coiled Cables are made exclusively for Knight Global.
- Connects a Servo Hoist to a load monitoring module by wrapping itself around the Servo Chain.
- 19-Pin Military Bayonet Style Connectors.
- 90 Degree Male to Female Connectors.
- Optional Straight Cable configuration.
- Available Lengths:
- KCA1040-2 (2 ft. [60.9 cm])
- KCA1040-3 (3 ft. [91.4 cm])
- KCA1040-4 (4 ft. [121.9 cm])
- KCA1040-6 (2 ft. [182.9 cm])
- KCA1040-8 (8 ft. [243.8 cm])
- KCA1040-10 (10 ft. [304.8 cm])
- KCA1040-12 (12 ft. [365.7 cm])
- KCA1040-15 (15 ft. [457.2 cm])
- KCA1040-20 (20 ft. [609.6 cm])
- Electrical Straight Cables are made exclusively for Knight Global.
- Connects a separate control handle pendant to Servo Hoists.
- 19-Pin Military Bayonet Style Connectors.
- 90 Degree Male to Female Connectors.
- Optional Coiled Cable configuration.
Disconnects
+- Provides mounting surface for enclosures in open workstation environments.
- Stand allows for multiple adjustment heights.
- Electrical Disconnect Enclosure Box Not Included.
- Air Prep option for the back side.
- Floor Mounted.
- Bolted Construction M10X1.5 w/ Nylock nuts.
- Various enclosures mount to stand.
- Wall mounted enclosures mount to stand.
- Custom finishes are available. (Blue is Standard).
- Foot Print: 30x21x62.
- Floor Mounting Hole Pattern: 24×18.
- Optional Pneumatic Lockout Mounting Plate.
- Optional Dual Enclosure Configuration. (Front and Back).
- Provides mounting surface for enclosures in open workstation environments.
- Stand allows for multiple adjustment heights.
- Power Distribution Panel (PDP) Not Included.
- Air Prep option for the back side or the lower cross brace.
- Floor Mounted.
- Bolted Construction M10X1.5 w/ Nylock nuts.
- Custom finishes are available. (Blue is Standard).
- Foot Print: 40x21x65
- Optional Pneumatic Lockout Mounting Plate.
- Provides mounting surface for enclosures in open workstation environments.
- Stand allows for multiple adjustment heights.
- Power Distribution Panel (PDP) Not Included.
- Air Prep option for the back side.
- Floor Mounted.
- Bolted Construction M10X1.5 w/ Nylock nuts.
- Custom finishes are available. (Blue is Standard).
- Foot Print: 56x21x66
- Optional Pneumatic Lockout Mounting Plate.
- Optional Dual Enclosure Configuration. (Front and Back).
- Used with: KSH250S, KSH350S, KSH500S, KSH750S and KSH1000S Servo Hoists.
- Flange disconnect.
- Transformer Disconnect, 3KVA.
- Enclosure Size: 21 in. X 20 in. X 10 in.
- 480VAC – 240VAC, FLA 6.25.
- 15A Primary Fusing.
- 15A Secondary Fusing.
- Enclosures are mounted at a ergonomically correct height.
- Optional Dual Enclosure Configuration. (Front and Back)
- Stand not included.
- Provides mounting surface for enclosures in open workstation environments.
- Stand allows for multiple adjustment heights.
- Electrical Disconnect Enclosure Box Not Included.
- Air Prep option for the back side.
- Floor Mounted.
- Bolted Construction M10X1.5 w/ Nylock nuts.
- Various enclosures mount to stand.
- Wall mounted enclosures mount to stand.
- Custom finishes are available. (Blue is Standard).
- Foot Print: 19x21x62.
- Optional Pneumatic Lockout Mounting Plate.
- Optional Dual Enclosure Configuration. (Front and Back).