Product Name: Electrical Insulating Paperboard B Trademark: Redsun Transport Package: Cartoon & Pallet Origin: China Product Description Transformer pressboards are made with pre-compressed grade unbleached sulphate wood pulp, with characteristics of high mechanical, electrical strength, tensile strength, high elongation, low compressibility and proper bending resistance.The excellent properties realized wide-spread application in electrical transmission and distribution equipments like power transformers, shunt Reactors, instrument transformers.etc.NO.ItemsUnitStandard DataTest Result1Thickness Tolerance%±7.522ElongationLengthwise%≥3.05.75Widthwise≥4.05.453Tensile StrengthLengthwiseN/m 2≥ 100105.8Widthwise≥7582.54ShrinkageLengthwise%≤0.50.48Widthwise≤0.70.6Thickness≤5.04.75Electric strength (in Oil),Kv/mm≥4041.56Ash Content %≤ 1.00.537Oil absorption%≥11.023.528PH value of aqueous extract -6-97.239Conductivity of aqueous extract Ms/m≤5.04.810Moisture Content%≤6.05.811Densityg/cm 31.00-1.251.0812Reference Standard-IEC60641-3-1:1992-13Test Sample Thicknessmm-1.0
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