3 Components of alternative rules
In the alternative group is the most UL1446 characteristics, the most important test method It insulation materials and promote the development of insulation can not be underestimated role. As we all know, an insulated structure stereotypes takes a long stage, from material selection through final derivative functional evaluation Regardless of which they spend huge resources, time is at least a year and a half to two years. In other words, a recognized insulation structure, they use most of the material is at least a year and a half ago established products this lag effect a serious impact on the advanced nature of the final product. Today's society and the development of science and technology rapidly anomalies, new materials, new products continue to emerge. How to resolve this contradiction, so that better performance of materials used in insulation mature structure up?
UL1446 solved the problem. UL1446 eight hours, the main structural insulation components and sub-components insulation two categories. The former refers to the insulation, turn-to-turn insulation, and encapsulated insulation, such as varnish, which means jumper insulation, wiring insulation primers, Casing and lashing fixed materials. In principle, has been testing and the temperature level of insulation structure, copies of a particular group should be an alternative to "seal of testing" by the procedure. But for the same types of minor insulation components for alternative, we may conduct one or more short-term rapid test, If infrared spectroscopy, thermal analysis, the dielectric strength test. If the substitute materials can confirm the ingredients equivalent to or better than the original materials, will allow alternative and not doing other tests; confirm if required to do sealed test tube or single point aging test.
The main components of insulation should be replaced following provisions:
1. If the alternative to the 原文请找腾讯752018766辣,文-论'文"网http://www.751com.cn be "sealed test tube" or single-point thermal aging test of the two to determine whether a replacement.
2. If the alternative section of the temperature grading structure than the original section of low-grade temperature, a single low-grade, the new structure should be done by a single point heat aging tests or "sealed test tube" plus wire right tests to determine whether alternative.
3. If the alternative section of the temperature levels than the original structure Paint a low temperature level above grade, the entire structure of the new insulation should be done to the integrity of 3:00 or 4:00 thermal aging tests to determine whether alternative.
4. The other right to turn-to-turn insulation or insulation in the chemical composition and structure of the original group were different. we must carry out a complete thermal aging test; If copies of the same chemical group, nearly material somewhat smaller size, have to do a single point of thermal aging; If the same chemical composition, size equal to or greater than the original structure. By infrared analysis and structure of variation, so it's not necessary to heat aging tests.