BS EN 60371-3-4:1996:2007 Edition
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Specification for insulating materials based on mica – Specifications for individual materials – Polyester film-backed mica paper with a B-stage epoxy resin binder
| Published By | Publication Date | Number of Pages |
| BSI | 2007 | 12 |
Requirements for electrical insulating materials made by combining mica paper with a single polyester film and impregnating the mica with an epoxy resin.
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| 1 | BRITISH STANDARD BS EN 60371-3-4:1996 IEC 371-3-4: 1992 Specification for insulating materials based on mica – Part 3: Specifications for individual materials – Sheet 4: Polyester film-backed mica paper with a B-stage epoxy resin binder |
| 2 | This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GEL/15, Insulating materials, upon which the following bodies were represented: British Ceramic Research Ltd. British Industrial Ceramic Manufacturers’ Association British Telecommunications plc Department of Trade and Industry (National Physical Laboratory) Electrical and Electronic Insulation Association (BEAMA Ltd.) Electricity Association Federation of the Electronics Industry Ministry of Defence Rotating Electrical Machines Association (BEAMA Ltd.) Transmission and Distribution Association (BEAMA Ltd.) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: ERA Technology Ltd. Mica Trade Club |
| 3 | Contents |
| 4 | National foreword This British Standard was published by BSI. It is the UK implementation of EN 60371-3.4, incorporating amendment A1:2006. It is identical with IEC 371-3-4:1992, incorporating amendment 1:2006. The start and finish of text introduced or altered by amendment is indicated in the text by tags !”. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated in the text by !”. The UK participation in its preparation was entrusted to Technical Committee GEL/15, Insulating materials. A list of organisations represented on GEL/15 can be obtained on request to its secretary. (IEC 243-1:1988) Part 1:1994 Tests at power frequencies Part 2:1988 Methods of test (IEC 371-3-2:1991) Part 3 Specifications for individual materials Sheet 2:1995 Mica paper Part 3 Specifications for individual materials Section 3.2:1995 Requirements for balanced biaxially oriented polyethylene terephthalate (PET) films used for electrical insulation This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. |
| 5 | EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 60371-3-4 +A1 Descriptors: Electrical insulating materials, solid electrical insulating materials, electrical insulating paper, mica material, backed materials, polyester, epoxy resins, specifications English version Specification for insulating materials based on mica Part 3: Specifications for individual materials Sheet 4: Polyester film-backed mica paper with a B-stage epoxy resin binder (IEC 371-3-4:1992) This European Standard was approved by CENELEC on 1995-05-15. CENELEC members are bound to comply with the CEN/CENELEC Internal … Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tran… CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. |
| 6 | Foreword The text of the International Standard IEC 371-3-4:1992, prepared by SC 15C, Specifications, of IEC TC 15, Insulating materials, was approved by CENELEC as HD 352.3.4 S1 on 1994-03-08. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 60371-3-4 on 1995-05-15. The following date was fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Foreword to amendment A1 The text of document 15/332/FDIS, future amendment 1 to IEC 60371-3-4:1992, prepared by IEC TC 15, Standards on specifications f… The following dates were fixed: Endorsement notice The text of amendment 1:2006 to the International Standard IEC 60371-3-4:1992 was approved by CENELEC as an amendment to the European Standard without any modification. |
| 7 | 0 Introduction !This International Standard is one of a series which deals with insulating materials for use in electrical equipment built up from mica splittings or mica paper, with or without reinforcement, and with mica paper in its pure state. The series consists of the following three parts: This standard contains one of the sheets comprising part 3, as follows: 1 Scope This International Standard gives requirements for electrical insulating materials made by combining mica paper with a single po… The specification covers material having nominal thickness from 0,16 mm to 0,23 mm. !Materials which conform to this specification meet established levels of performance. However, the selection of materials by a … Safety warning: It is the responsibility of the user of the methods contained or referred to in this document to ensure that they are used in a safe manner.” 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this Intern… !IEC 60243-1:1998, Electric strength of insulating materials – Test methods – Part 1: Tests at power frequencies. IEC 60371-2:2004, Specification for insulating materials based on mica – Part 2: Methods of test. IEC 60371-3-2:2005, Insulating materials based on mica – Part 3: Specifications for individual materials – Sheet 2: Mica paper. IEC 60674-3-2:1992, Specification for plastic films for electrical purposes – Part 3: Specifications for individual materials – Sheet 2: Requirements for balanced biaxially oriented polyethylene terephthalate (PET) films used for electrical insulation.” 3 Designation !When ordering materials to this specification, only the specification and type numbers need be quoted (see Table 1). Example: IEC 60371-3-4: type 4.1.01 The type number is derived from: Thus giving type number 4.1.01.” The descriptive code quoted in Table 1, for example F23/M150/R54 for type 4.1.01, is derived from: 4 Requirements: raw materials 4.1 Mica paper !Mica paper referred to in this specification shall comply with the requirements of IEC 60371-3-2.” 4.2 Polyester film !Plastic films used as backing material shall be PET and shall comply with the requirements of IEC 60674-3-2.” 4.3 Epoxy resin Any epoxy resin system may be used which enables the material to meet the requirements of this specification. |
| 8 | 5 Requirements: compositions and tolerances !When tested by the method of clause 7 of IEC 60371-2, the composition of the products shall lie within the limits of Table 1.” 6 Requirement for material (as received) 6.1 General All materials in any one consignment shall have the same properties, within the limits of this specification, throughout the length of each roll. The surfaces shall be uniform and free from defects such as bubbles, pin-holes, creases and flaws. Material supplied in rolls shall be capable of being unrolled continuously without damage, and the force required to unroll the … Table 1 – Composition g/m2 g/m2 g/m2 g/m2 mm Max. % 4.1.02 4.1.03 4.1.04 4.1.05 4.1.06 4.1.07 4.1.08 4.1.09 4.1.10 4.1.11 F23/M150/R70 F23/M150/R100 F23/M160/R80 F23/P160/R80 F50/M160/R80 F50/P160/R80 F23/M180/R90 F23/P180/R90 F50/M180/R90 F50/P180/R90 32 32 32 32 70 70 32 32 70 70 3 3 3 3 7 7 3 3 7 7 150 150 160 160 160 160 180 180 180 180 12 12 13 13 13 13 15 15 15 15 70 100 80 80 80 80 90 90 90 90 14 20 16 16 16 16 18 18 18 18 252 282 272 272 310 310 302 302 340 340 25 28 27 27 31 31 30 30 34 34 0,15-0,17 0,16-0,18 0,16-0,18 0,16-0,18 0,19-0,21 0,19-0,21 0,17-0,19 0,17-0,19 0,22-0,24 0,22-0,24 0,14-0,18 0,15-0,19 0,15-0,19 0,15-0,19 0,18-0,22 0,18-0,22 0,16-0,20 0,16-0,20 0,21-0,25 0,21-0,25 1,0 1,0 1,0 1,0 1,0 1,0 1,0 1,0 1,0 1,0 To prevent damage to the mica paper component during winding, the unwinding tension shall be less than: Unless otherwise specified in the purchase contract the material shall be rolled with the mica surface on the outside. 6.2 Width This specification contains no requirement for width of tape. However, the following widths are preferred: 10, 12, 15, 20, 25, 30, 40 and 50 mm. The maximum trimmed width of full width material and sheet normally available is 1 000 mm. The tolerance on the width of the material shall be as in Table 2. Table 2 – Tolerance on width mm mm > 20 k 500 > 500 ± 1,0 ± 5,0 6.3 Thickness !Measure the thickness in accordance with clause 4 of IEC 60371-2, using the apparatus given in 4.1.1 of that standard, making 10 measurements of one thickness of material.” The measured values shall be in accordance with the requirements of Table 1. 6.4 Length There is no requirement in this specification for roll length, and this should therefore be subject to the purchase contract. 6.5 Cores The tape shall be supplied compactly wound on cores of 25 mm, 40 mm, 55 mm, or 76 mm ID which shall be free from sharp edges. The width of the cores in relation to that of the tape should be subject to agreement between purchaser and supplier. Full width material and material wider than 100 mm shall be supplied on 55 mm or 76 mm cores. |
| 9 | 6.6 Joins The number of rolls with joins shall be limited to 25 % of any one consignment. Joined rolls of length less than 100 m shall con… The method of making joins should be subject to the purchase contract. 6.7 Stiffness The stiffness of the material should be subject to the purchase contract. !When the stiffness is specified, the material should be tested by the method of clause 11 in IEC 60371-2.” 6.8 Resin flow !When tested at (160 ± 2) °C by the method of clause 14 of IEC 60371-2, resin flow shall be between 40 % and 70 %.” 7 Requirements for material after curing 7.1 General When required by the purchaser the supplier shall provide evidence that the material meets the requirements of clause 7. !For the following tests, the specimens shall be prepared in accordance with method 1 of clause 3 of IEC 60371-2, the number of … 7.2 Flexural strength !When tested by the method of clause 9 of IEC 60371-2, the flexural strength shall be not less than 150 MPa at (23 °C ± 2 K) nor less than 100 MPa at (155 °C ± 5 K).” Visual evidence of delamination during the flexural strength test shall constitute failure. 7.3 Elastic modulus !When tested by the method of clause 9 of IEC 60371-2, the elastic modulus shall be not less than 30 GPa.” 7.4 Electric strength !When tested by the method of clause 16 of IEC 60371-2 with electrodes according to 4.1.1.1 (25/75 mm diameter) of IEC 60243-1, the electric strength shall be not less than 50 kV/mm.” 7.5 Dissipation factor/Temperature characteristics at 48-62 Hz !When tested by the method of clause 17 of IEC 60371-2, the dissipation factor shall not exceed the values stated in Table 3 at the temperature given.” Table 3 – Dissipation factor requirements °C Max. 130 155 0,07 0,20 7.6 Thermal endurance !This shall be tested in accordance with clause 21 of IEC 60371-2 using flexural strength at (23 °C ± 2 K) as the property with reduction of 50 % of the original value as the end point criterion.” This temperature index shall be not less than 155. 8 Packing The materials should be packaged to ensure adequate protection during transport, handling and storage. Any necessary packing requirements should be the subject of purchase contract. Each package containing a number of unit packs shall have the following information clearly and indelibly marked on it. a) description of the material and the number of this specification; b) for material delivered in rolls, the width of the material and the length; c) for material delivered as sheets, the dimensions of the sheet and the number of sheets in a stack, or the weight of the stack; d) the number of rolls, if applicable; e) the date of manufacture; f) shelf-life and storage conditions. The manufacturer’s reference number and batch number shall be identified on each package or roll. Joined rolls shall be packed together clearly labelled on the outside of the container. |
| 10 | Annex ZA! (normative) Normative references to international publications with their corresponding European publications 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 of the referenced document (including any amendments) applies. Part 1: Tests at power frequencies Part 2: Methods of test Part 3: Specifications for individual materials – Sheet 2: Mica paper Part 3: Specifications for individual materials – Sheet 2: Requirements for balanced biaxially oriented polyethylene terephthalate (PET) films used for electrical insulation ” |
| 11 | List of references See national foreword. |
| 12 | BS EN 60371-3-4:1996 IEC 371-3-4: 1992 BSI 389 Chiswick High Road London W4 4AL BSI – British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an ina… BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical… Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase pri… Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international st… This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size,… If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. |
