BSEN60684-3-281:2010 - 6 - 60684-3-281@IEC:2010 FLEXIBLEINSULATINGSLEEVING- Part3:Specifications for individual types of sleeving Sheet 281:Heat-shrinkable,polyolefin sleeving, semiconductive Scope This part of IEC 60684 gives the requirements for two types of heat-shrinkable, polyolefin sleeving, semiconductive, with a nominal shrink ratio of 3:1. Thissleevinghasbeenfound suitableuptotemperaturesof 1oo°C. Type A: Thin wall Internal diameterup to 195,0 mm typically Type B:Medium wall Internal diameter up to 120,0 mm typically These sleevings are normally supplied in the colour black. Since these types of sleevings cover a significantly large range of sizes and wall thicknesses Tables A.1 and A.2 in this standard provides guidance to the range of sizes available. The actual size shall be agreed between the user and the supplier. Materials which conform to this specification meet established levels of performance However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This sleeving is designed to be used in Mv cable accessories and as such electrical performance must be proven as part of the assembly. Examples of this are described in HD 629andIEC 60502series. 2 Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies.For undated references, the latest edition IEC 60296:2003,Fluids forelectrotechnicalapplications-Unused mineral insulating oils for transformersand switchgear IEc 60502(all parts),Power cables with extruded insulation and their accessories forrated IEC60684-2:1997,Flexible insulatingsleeving-Part2:Methodsoftest Amendment1(2003) Amendment2(2005) IEC60757:1983,Codefordesignationofcolours BSEN60684-3-281:2010 60684-3-281@IEC:2010 - 7 - HD 629,Test requirementson accessoriesforuse onpowercablesof rated voltagesfrom 3,6/6(7,2)kVupto20,8/36(42)kV-Part1:Cableswithextruded insulation 3 Designation The sleeving shall be identified by the following designation: IEC publication IEC part IEC sheet Description Type Size (expanded and Colour number number number recovered internal diameter in millimetres) ↑ 个 个 个 个 个 个 Sleeving IEC60684 - 3 -281 - A - 50/20 Black Any colour abbreviation shall comply with IEC 60757, where applicable. Non-standard colours shall be written out in full. NOTE This information is for labelling only in accordance with IEC 60684-1. Conditions of test Unless otherwise specified, the sleeving shall be shrunk in a forced air circulation oven for (10 ± 1) min at 200 °C ± 3K prior to testing. 5 Requirements In addition to the general requirements given in IEC 60684-1, the sleeving shall comply with the requirements ofTables 1and 2. 6 Sleeving conformance Conformance to the requirements of this specification shall normally be based on the results from typical sizes: Type A, Thin wall: Recovered ID 20 mm -30 mm Type B, Medium wall: Recovered ID20mm-30mm BSEN60684-3-281:2010 - 8 - 60684-3-281@IEC:2010 Table 1 - F Property requirements Property IEC 60684-2 Max. Remarks Units Requirements clause or or min. subclause 3 Dimensions - Internal diameter 3.1.2 mm 3.3.2 - Wall thickness mm - Concentricity 3.3.3 % To be agreed between papuedxa- Min. the purchaser and the Min. - recovered supplier 60 85 Heat shock 6 Heat at Tensile strength 19.1 and 19.2 MPa Min. 8 150°C±5K. Elongation at break 19.1 and 19.2 Min. 175 % 9 +5 Longitudinal % Max. change -10 Bending at low 14 No cracking - Test at -40 °C temperature shall be visible. For strips, the mandrel shall be between 20 and 22 times the wall thickness. Full section sleeving is tested unfilled and the mandrel shall be between 20 and 22 times the outer diameter. Dimensional 16 The dimensions shall See Clause 1 Scope. 一 stability on storage remain as agreed. Min. Tensile strength 19.1 and 19.2 MPa 10 Use a jaw