How Do I Wire A Potentiometer To My Pump VFD?
The connections for a potentiometer are as follows…
Electrical Question from Eric about Electrical Wiring for a Variable Frequency Drive
Background: Eric, a Handyman from Delta, CO
Question: I have an irrigation pump that is controlled by a VFD. The VFD output can be controlled by a remote potentiometer which I am attempting to install. I have no instructions for the potentiometer. It is correctly sized for this application. The potentiometer has three tabs for electrical connections. The VFD has three terminals for the potentiometer to hook to. They are labeled L (analog ground for excitation), H (DC 10V reference) and O (voltage input for the signal). How do I determine which tab on the potentiometer corresponds with each VFD terminal?
Thanks for your electrical question Eric.
The Make and Model/Part Numbers of both the VFD and the Remote Potentiometer: VFD – Hitachi L300P450LFU2, Potentiometer – Alpha B1K
The connections for a potentiometer are as follows:
Looking at the pot with the ShaftÂ Pointing Towards You the Tabs would be 1 -2 -3 , Left to Right, Tabs Pointing Down.
Tab 1 is GroundÂ – VFD – L Analog Ground
Tab 2 is Analog Out – VFD – O Voltage Signal
Tab 3 is Voltage Input – VFD H DC 10V
Eric – I could not verify the information that you have for the VFD, so I’m just providing the Pot Tab Assignments.
This answer is limited to the above mentioned VFD only. The potentiometer connections are standard.
The Following links will assist you with your electrical question:
For more information about Electrical Wiring
This link is helpful as a Handyman
Make sure not to miss these Resources for: How-To-Videos
Be Careful and Be Safe – Never Work on Energized Circuits!
For Best Results Consult a Licensed Electrical Contractor.
Locate An Electrical Contractor in Your Area
You Can Avoid Costly Mistakes!
Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book
Great for any Home Wiring Project.
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
Electrical Tips to Help You Wire it Right
The Safest Way to Test Electrical Devices and Identify Electric Wires!
The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
The Quickest Way to Check for Faulty Electrical Wiring!
The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets
Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency
Lights indicate if wiring is correct and indicator light chart is included
Tests standard 3-wire outlets
Light indicates if wiring is incorrect
Very handy and easy to use.
Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!
The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..
The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.