ASTM D709-01 pdf free

04-09-2021 comment

ASTM D709-01 pdf free.Standard Specification for Laminated Thermosetting Materials.
Made of fabric of same weight and thread-count limits as Grade L sheet. For electrical applicationsrequiring greater toughness than Grade XX. Better machiningproperties and finer appearance than Grade CE, also availablein thinner sizes.Good in moisture resistance.This grade is notrecommended for primary insulation” for electrical applica-tions involving commercial power frequencies at voltages inexcess of 600 V.Made from fabric of same weightand thread-count limits as Grade L molded tubes. For usewhere the seams from a molded tube may be objectionable andwhere the application requires good machining qualities, together with fair electrical and good mechanical properties.Thisgrade is not recommended for primary insulation’ for electri-cal applications involving commercial power frequencies atvoltages in excess of 600 V.Made from a fineweave cottonfabric of the same weight and thread-count limits as Grade Lmolded.Has excellent machining and moisture-resisting char-acteristics. For use in restricted electrical applications where atougher material than Grade XX tube is required at somesacrifice of electrical properties; dielectric strength may be lowat molded seams,especially in thin walls. Better electricallythan Grade CE molded, but not quite as tough. This grade is notrecommended for primary insulation” for electrical applica-tions involving commercial power frequencies at voltages inexcess of 600 V.Similar in count and weight of fabric toGrade LE molded tube, also in general characteristics except aslimited by inherent differences in construction and shape.Thisgrade is not recommended for primary insulation” for electri-cal applications involving commercial power frequencies atvoltages in excess of 600 V.
Continuous filament-type glass cloth with heat-resistant melamine resin binder.Highest mechanical strength and one ofthe hardest laminated grades. Reduced rate of burning. Secondonly to silicone laminates in heat and arc resistance.Excellentelectric strength properties under wet conditions.Good dimen-sional stability.Characteristics are similar to thosefor sheets except as limited by inherent differences in construc-tion and shape. Especially high internal bursting strength.This grade is not recommended inthis form.Characteristics are similar to those forsheets except as limited by inherent differences in constructionand shape. Mold seams are weak points mechanically andelectrically.ASTM D709 pdf download.

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