ask the electrician
Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

Variable Frequency Drive Controllers

How to connect VFD that is use for motor speed control -3 phases, 440 Volt…

Electrical Video #1

Electrical Wiring Tips

Helping You to Wire It Right!

See more Home Electrical Wiring Videos

Check out my YouTube Channel, and Subscribe!

See the Electrical Wiring Video #2 Below:

Electrical Question from Glabrous about a Variable Frequency Drive
Background: Glabrous, a Electrician from Yangon,Myanmar
[ad#block]Question: I have a little problem. Please answer me.
How to connect VFD (it is use for motor speed control -3 phases, 440 Volt (such as 55KW, 22KW,15KW motors) ) with its control who operator use? What wiring diagrams can use?

Additional Comments: Sure; I think this website can help me and other.

Dave’s Reply:
Thanks for your electrical question Glabrous.
Yes – I am familiar with VFD, Variable Frequency Drives and I have installed quite a few in 3 phase 480 volt motor control applications including large industrial pumps and air handler units. The VFD Control Interface, also known as a Human Machine Interface (HMI) provides start, stop and speed adjustments. The HMI may have a keypad and display screen or led indicator lights to provide information about the settings and operation of the VFD unit. Each VFD unit comes with a helpful  installation manual complete with wiring diagrams.

The Following links will assist you with your electrical question:

For more information about Wiring Diagram
Wiring Diagrams

This link is helpful as a Electrician
Electrical Code Articles

Make sure not to miss these Resources for: More eBooks
Home Electrical eBooks

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

The following may also be helpful for you:

Electrical Wiring Video #2

Home Electrical Wiring Videos about this Topic and More

Check out my YouTube Channel, and Subscribe!

Learn more with my Home Electrical Video Course:

Basic Home Electrical Wiring by Example

Dave's Guide to Home Electrical Wiring:

» 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.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, 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.

More articles about Electrical and Home Electrical Wiring:
« Previous Next »
Electrical Wiring to a Porcelain Lamp Holder Light Fixture Control Wiring Options

FAQs Frequently Asked Questions and Comments

2 Responses to “Variable Frequency Drive Controllers”
  1. haileyesus says:

    I have a little problem. How do I connect a VFD (Variable Frequency Control) that is used for motor speed control that would be used for a 3-phase,440 volt motor, such as 55kw,22kw,15kw motor. With its control operator uses what wiring diagram can be used?

  2. Dave Rongey says:

    Hi Haileyesus,
    The VFD must be compatible with the motor that it will be used for. Motors are rated in HP, and then the circuit power that is available. The VFD must be sized for the specific motor it will be used to control. Various control operators are available depending on the VFD brand that is selected. Some operators are installed into the enclosure of the VFD, and remote operators are available to enable manual or automatic motor speed adjustments from remote locations such as a control cabinet or SCADA, BMS or EMS System. The VFD will come with an installation manual and wiring diagrams which will assist you in the installation.