Dexter recommends "Transient Voltage Surge Supressors" be installed by local electrical contractors familiar with the local power grid. I can't tell you much about mine while I'm on the road with no reference, but we did have one melt and protect all 17 washers while dryers were blowing fuses, power strips were shorting out and bill breakers were frying boards.
Given the cost of just one washer VFD unit, I'd say the $500 spent on the unit and install was worth it...
Granted, most stores will usually have good, clean power. You might never see a loose neutral wire in the transformer outside your building, but it's kinda like cheap insurance or a good warranty - a small expense when you don't need it, but worth $10-$20K or more when you do.
__________________ 4 locations to serve you: 693 Central Ave. - Coos Bay, OR
1921 Virginia Ave. - North Bend, OR
320 N. 14th St. - Reedsport, OR
2420 Highway 101 - Florence, OR www.GreenLightningLaundry.com
These surge protectors come in a hundred different sizes and price ranges from hundreds to thousands of dollars. They can be ordered online or from any electrical supply warehouse. Knowing which one to order is the problem. Even my electrician had to consult several times with his supplier prior to ordering one for my main 3 ph panel. It was installed about 2 years ago at a total cost of $1,400. Even after all that, I still lost a VFD after a recent power surge.
"Lead, follow or get out of the way." Larry Adamski
SurgePro, Inc. Phone: 801-233-0151
8731 South Sandy Parkway
Suite 108 Fax: 801-233-0152
Sandy, UT 84070 Email: firstname.lastname@example.org
This is the company i have dealt with. Whole panel protectors shipped to me with all applicable taxes/freight/broker (i'm in canada)-under $400. Call them and let them know your particulars and they will get you what you need.