Method of electrical arc flash protection
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United States of America Patent
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Dec 5, 2006
Issued Date -
N/A
app pub date -
Jan 20, 2005
filing date -
Jan 15, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of employing an electrical arc protective blanket to protect workers from electrical arc flashes. The blanket is composed of two or more layers where the layer closest to the electrical arc source is of a fiberglass material and the remainder of the layers are of fiberglass and/or a flame-retardant (FR) materials. The layers overlap so that the they can be attached around the entire perimeter. Preferred fiberglass fabrics are woven with a warp yarn break strength between about 0.7 and 1.5 times the fill yarn break strength. FR materials include FR cotton, para-aramids, and meta-aramids. A fastening structure is used to install the blanket for use. Contemplated fastening structures include straps with temporary fasteners around the blanket perimeter and eyelets. Optional integral handles facilitate carrying and installation.
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