The difference between European and American standards for arc thermal protection
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Arc flash protective clothing arc fabric standard
Arc flash is the most likely cause of electrical accident injuries to electrical workers because the temperature at the point of severe arcing is approximately 35,000 degrees Fahrenheit. It is four times the surface temperature of the sun. The surrounding materials are vaporized or melted and ejected at high temperatures. If the worker’s clothes are ignited, it will cause burns and scalds over a large area of the body.
The current testing standards for Arc Protective Clothing mainly include European standards and American standards.
The European standard Arc protective clothing fabrics testing standard is: for 4 pieces of fabrics exposed to arc reaction, the corresponding fabrics are tested. Data results. The test conditions are test voltage 400V, arc flash time 500ms, the upper electrode is made of aluminum, the lower electrode is made of copper, the electrode space is 30mm, and the distance between the test sample and the electrode is 300mm.
The requirements of European standards for the design of ready-made clothing are: the design of clothing will not cause any obstacles to the user’s movement during use and work; the clothing must be long-lasting Sleeves are designed to protect the entire upper torso; buttons or zipper accessories of clothing can still function normally after an arc flash reaction; sewing threads, accessories, buttons or zipper accessories of clothing will not cause further human injury after an arc flash reaction; Metal fittings, buttons or zippers must be covered by fabric, non-metal fittings, buttons or zippers may be exposed on the surface.
American standard arc protective clothing mainly includes flame retardant performance, fabric weight, tensile strength, tear strength, wash color fastness, and wash shrinkage. And the determination of arc protection value and other aspects. The arc protection value measurement method is based on 21 fabrics exposed to arc reaction.
American standards require clothing: clothing sewing threads, accessories, buttons or zipper accessories will not cause further human injury after an arc flash reaction; Flame-retardant sewing threads should be used on clothing and will not melt at the test temperature of 260°C in the 191A flame retardant test; if any clothing accessories, zippers or buttons are exposed to an arc flash reaction, they may cause heat transfer or melting In this case, it must be covered with fabric to avoid direct contact with the skin.
The Arc Protective Clothing produced by City Textile can meet the American standard NFPA70E and the European standard IEC61482-1 -1 and other standards.
：City
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