How long will Therm-A-Guard® bushing covers last?
All Therm-A-Guard® models come with a 10-year warranty; however, many utilities across the US and abroad currently have Therm-A-Guards® installed for well over 10 years without any degradation in color or physical characteristics of the guard. The long life, with zero material change, despite years of blistering sun exposure, is attributed to the high levels of UV inhibitors added to our raw material.
How much do your mesh bushing guards cost?
Extra Large: $34.50
Can a Therm-A-Guard® cover be installed hot?
Yes. Our medium, large and extra-large guards have hot stick handles and an easy-to-use latching system to install the guards hot when required. Our smallest guard, however, does not have hot stick handles. The small guard was designed for use where space and clearance between bushings might be a problem; extended hot stick handles could made proper clearances an issue.
Will infrared inspections be performed accurately with Therm-A-Guard® bushing covers installed?
Yes! Infrared inspections can now precisely detect hot spots on wildlife guarded equipment using the patented Therm-A-Guard® design. The view is clear enough to easily determine the exact cause of the hot spot and its actual temperature. Conventional solid wildlife guards mask this view and make it impossible to accurately detect and report these hot spots.
Are insects inclined to build nests in Therm-A-Guard® covers because of its open mesh design?
Wasps and other insects are more prone to build nests in conventional solid bushing guards because they will be protected from inclement weather. Therm-A-Guard's® open design allows wind and rain to enter the guard resulting in cooler operating temperatures of the protected equipment while also washing away contaminants that build up on the equipment. Of course, insects do not want to build a nest in this type of wet environment . Additionally, Therm-A-Guards® allow linemen to easily see a nest prior to working on the equipment. Insect killer can be sprayed directly through the guard preventing insect stings to your employees.
Will the Therm-A-Guard® lower equipment operating temperatures?
Yes. The open design of the Therm-A-Guard® allows for increased air circulation around the guarded equipment thus maintaining cooler operating temperatures. Cooler temperatures are critical to the life expectancy of your bushing's gasket.
Where is the Therm-A-Guard® manufactured?
The Therm-A-Guard® Wildlife Protector is manufactured in Tampa Bay, Florida U.S.A. Manufacturing in our ISO certified facility insures quality parts and materials in every Therm-A-Guard®.
Is the Therm-A-Guard® design patented?
Yes. The United States Patent and Trademark office issued US Patent No. 6,486,785 on November 2, 2002.
What size bushing does Therm-A-Guard® fit?
We offer four (4) sizes of Therm-A-Guard®s that will cover nearly all bushings and potheads; overhead distribution transformers; substation transformers; substation breakers; regulators and reclosures. Please see our guard specification sheets for exact dimensions.
Is the Therm-A-Guard® UV stabilized?
Yes. All Therm-A-Guard® models are UV stabilized with a .75% HALS UV stabilizer. This high level of UV stabilization is more than triple that of most outdoor polyethylene products and will provide a minimum of 15 years of outdoor life without degredation.
How and where is the Therm-A-Guard® installed?
The Therm-A-Guard® is usually installed around the first skirt below the exposed bushing or pothead connector. It can, however, be installed around the second of third skirt or the bushing cap if size or clearance is an issue. The larger guards were engineered to allow any one of the three or four hinges to be cut out for side-exit leads. The smaller guard was designed so that solid areas around the two hinges could be cut out to accommodate side exit leads. Additionally, the flexible bushing grips, located at the bottom of the guard, can be easily trimmed to accommodate various size bushings.
What material is the Therm-A-Guard® made from?
Therm-A-Guard® wildlife protectors are produced from an engineering-grade, high-density polyethylene called Marlex 9018, manufactured by Chevron-Phillips Corporation. (Complete material specifications and data sheets are available). The Therm-A-Guard® has a smooth, highly polished surface allowing rain to wash away contaminants that could otherwise build up. Both the polyethylene material and the colorant additive are UV stabilized.