We receive inquiries all the time from customers who have three phase equipmentand need to operate the equipment from single phase power. The main question we get is “How do I size a three phase drive for single phase input supply?”

For those of you who are not already aware, we offer variable frequency drive products that are designed for single phase input, three phase output. The products that are available however max out at 3hp or 5hp.

If you have an application that exceeds the 3-5hp range you can de-rate a three phase variable frequency drive for use with single phase input power. The formula we use for de-rating variable frequency drives for use with single phase power is as follows: Westart withthe motor current and multiply it by 1.73, then we take the revised current and size a variable frequency drive with the corresponding amps.

For example. Lets say I have a 7.5hp motor that pullsapproximately 23 amps; I want to use a vfd, however I only have single phase 230V line voltage. I need to multiply the 23 amps by 1.73 which gives me the new revised current (39.73 amps) Now I know I need a three phase 230V drive that is rated at40 amps or higher.Avfd that is rated at approximately 40 amps is about 15hp,and for this particular application would run a 7.5hp 240V driveperfect on 240V single phase power.

Precision Electric, Inc highly recommends contacting us or someone with experience to safely install variable frequency drives and/or electric motors.

We’ve Been Servicing the Industrial World Since 1983.

Minimize Your Downtime. Maximize Your Productivity.

Call Toll Free: 1.877.625.2402

Are you experiencing a problem with your electrical connection?

Typically one of two issues cause connection problems:
1. Loose connections
2. Bad connections-resulting from the following:

• Using incorrect lug-bolt-screw sizes
• Cross-threaded connections
• Oxidized contacts
• Wrong wire size
• Connection contact corrosion

Many peoples’ first response to connection problems is to tighten a bad connection, however this usually does not help. Tightening a bad connection usually creates more problems to existing conditions. The best solution to repair a bad connection is to uninstall connection, clean or replace bad parts, and reinstall connection.

If you’re certain a connection only needs tightened the best way to ensure the connection is not over tightened is by using a torque wrench with the correct values recommended by the manufacturer.

If you have an electrical board or other related piece of equipment that needs connections repaired, your best solution is to send it Precision Electric so we can inspect and repair your equipment beyond the OEM’s standards. We have been working on industrial manufacturing equipment since 1984. Our products and services exceed that of our competitors.

Ryan Chamberlin
Inside Sales, Customer Support
[email protected]

We’ve Been Servicing the Industrial World Since 1983.
Minimize Your Downtime. Maximize Your Productivity.

Call Toll Free: 1.877.625.2402

High humidity and daily washdowns can take their toll on the best food processing equipment. Precision Electric offers superior performance products, repair and maintenance services to keep your pumps, compressors, blower assemblies, and other critical machinery running at peak performance. To keep your equipment in prime operating condition, or when a breakdown occurs, you can depend on us to provide a wide selection of support.

Precision Electric offers Nema 4x enclosed drive products, Nema 4x gearboxes, pumps, custom control cabinets, AC electric motors, among several other food processing machinery and equipment; we also have capability to rebuild your machinery and equipment. Proven support to reduce operating costs by minimizing downtime, improving efficiency and extending equipment service life.

We are responsive to your needs 24/7. While you can choose from any of the many products and services we offer, our sales and support representatives can help you select a blend of these services to meet you facilitys specific goals and requirements.

Be it a new, existing or anticipated project, let us go to work for you. We have over 100 years of combined experience in the industrial manufacturing industry and we have been in business since 1983. If you have equipment that needs rebuilt we offer those services to our customers as well.

You can send in anything to Precision Electric for repair; from servo motors, circuit boards, servo drives to plc’s, AC/DC electric motors, pumping equipment and more. We will provide you with a free quote upon receiving your equipment. In many cases we offer quote estimates prior to you sending your equipment to us.

Click here to see our Industrial Food Processing Solutions brochure.
Ryan Chamberlin
Inside Sales, Customer Support
[email protected]