1、BRITISH STANDARD BS EN 60371-3-3:1995 IEC371-3-3: 1983 Specification for insulating materials based on mica Part3: Specifications for individual materials Sheet3: Specification for rigid mica materials for heating equipment The European Standard EN60371-3-3:1995 has the status of a BritishStandard I
2、CS29.040.20 UDC621.315.613.1:620.1:621.317.3BSEN60371-3-3:1995 This BritishStandard, having been prepared under the directionof the ElectrotechnicalSector Board,was published under theauthorityof the StandardsBoardand comesinto effect on 15December1995 BSI01-2000 The following BSI references relate
3、to the work on this standard: Committee reference GEL/15 Draft announced in BSI News September1995 ISBN 0 580 24975 1 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted to Technical Committee GEL/15, Insulating materials, upon which the following bo
4、dies 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
5、 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
6、 Amendments issued since publication Amd. No. Date CommentsBSEN60371-3-3:1995 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN60371-3-3 3 List of references Inside back coverBSEN60371-3-3:1995 ii BSI 01-2000 National foreword This Briti
7、shStandard has been prepared by Technical Committee GEL/15 and is the English language version of EN60371-3-3:1995 Specification for insulating materials based on mica Part3: Specifications for individual materials Sheet3: Specification for rigid mica materials for heating equipment, published by th
8、e European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC371-3-3:1983 published by the International Electrotechnical Commission (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respon
9、sible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding BritishStandard HD352.2. S1:1978 (IEC371-2:1973) BS6236 Electrical insulating materials based on mica Part2:1988 M
10、ethods of test Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the
11、 amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60371-3-3 June1995 UDC621.315.613.1:620.1:621.317.3 ICS29.040.20 Supersedes HD352.3.3 S1:1985 Descriptors: Specifications, insulating materials, insulating materials based on mica, rigid materials for heat
12、ing equipment English version Specification for insulating materials based on mica Part3: Specifications for individual materials Sheet3: Specification for rigid mica materials for heating equipment (IEC371-3-3:1983) Spcification pour les matriaux isolants base de mica Partie3: Spcifications pour ma
13、triaux particuliers Feuille3: Matriaux rigides de mica pour appareils de chauffage (CEI371-3-3:1983) Bestimmung fr Glimmererzeugnisse fr elektrotechnische Zwecke Teil3: Bestimmungen fr einzelne Materialien Blatt3: Heizmikanit (IEC371-3-3:1983) This European Standard was approved by CENELEC on1995-05
14、-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
15、ined 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 translation under the responsibility of a CENELEC member into its own language and notified to the Cent
16、ral Secretariat has the same status as the official versions. 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
17、. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN60371-3-3:1995 EEN60371-3-
18、3:1995 2 BSI 01-2000 Foreword The text of the International Standard IEC371-3-3:1983, prepared by SC15C, Specifications, of IEC TC15, Insulating materials, was approved by CENELEC as HD352.3.3 S1 on1984-12-13. This Harmonization Document was submitted to the formal vote for conversion into a Europea
19、n Standard and was approved by CENELEC as EN60371-3-3 on1995-05-15. 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. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Gene
20、ral requirements 3 3 Detection of defects and conducting particles in sheets 3 4 Thickness: measurements and tolerances 3 5 Characteristics 3 6 Flexural strength 4 7 Availability 4 8 Marking 4 Annex ZA (normative) Normative references to international publications with their corresponding European p
21、ublications 5 Table I Thickness tolerances Materials based on mica splittings 3 Table II Thickness tolerances Materials based on mica paper 3 Table III Characteristics of built-up mica materials for heating equipment 4 latest date by which the EN has to be implemented at national level by publicatio
22、n of an identical national standard or by endorsement (dop)1996-07-01EN60371-3-3:1995 BSI 01-2000 3 Introduction This standard is one of a series which deals with insulating material for use in electrical equipment built up from mica splittings or mica paper. The series consists of the three followi
23、ng parts: Part1: Definitions and General Requirements; Part2: Methods of Test; Part3: Specifications for Individual Materials. 1 Scope This sheet of the standard gives requirements for several types of rigid mica materials based on mica splittings or mica paper for application in electrical heating
24、equipment. These products may be made from muscovite or phlogopite mica with a suitable bonding medium. The binder may be totally driven off in service, giving a material which needs to be supported, or may remain totally or partially, giving a self-supporting material; in this case, the binder shal
25、l have the necessary resistance to the operating temperature. The products may be supplied in sheets, strips or flat pieces. The minimum nominal thickness is0.30mm (mica splittings) and0.20mm (mica paper). 2 General requirements The material as supplied shall be of uniform hardness, free from soft p
26、atches and foreign matter. The grade and visual characteristics of the splittings, as well as the nature of the mica paper and the bonding medium, shall be agreed between supplier and purchaser. 3 Detection of defects and conducting particles in sheets Until a method of detection of defects has been
27、 agreed for IEC Publication371-2: Specification forInsulating Materials based on Mica, Part2:Methods of Test, the accepted type and number of defects is subject to agreement between supplier and purchaser. 4 Thickness: measurements and tolerances The thickness shall be measured using the testspecime
28、n and procedure defined in IECPublication371-2. The thickness (central value), in millimetres, shall not depart from the nominal thickness by more than the tolerances given in Table I and Table II. These tables also give the permitted differences between individual measurements on the same specimen.
29、 Table I Thickness tolerances Materials based on mica splittings Table II Thickness tolerances Materials based on mica paper 5 Characteristics Table III gives the specified values for the characteristics of rigid mica materials for heating equipment, in whatever form they are delivered. 1 2 3 4 Nomi
30、nal thickness a Tolerance Thickness of specimen Individual measurements (mm) Unground (mm) Ground (mm) (mm) 0.30 0.40 0.50 0.60 0.80 1.00 0.06 0.06 0.07 0.08 0.10 0.12 +0.200.13 +0.200.15 +0.250.15 +0.250.15 +0.270.17 +0.300.20 Subject to agreement between supplier and purchaser Over1.00 No toleranc
31、es specified a Intermediate thicknesses shall be supplied with the tolerances appropriate to the next higher nominal thickness. 1 2 3 Nominal thickness a (mm) Tolerances Thickness of specimen (mm) Individual measurements (unground and ground) (mm) 0.20 0.30 0.40 0.50 0.60 0.80 1.00 Over1.00 0.04 0.0
32、4 0.04 0.05 0.05 0.06 0.07 0.05 0.05 0.06 0.07 0.07 0.08 0.10 10% a Intermediate thickness shall be supplied with the tolerances appropriate to the next higher nominal thickness.EN60371-3-3:1995 4 BSI 01-2000 Table III Characteristics of built-up mica materials for heating equipment 6 Flexural stren
33、gth Under consideration. 7 Availability Rigid mica material for heating equipment is generally available: in sheets approximately1m long and0.5m to1m wide; in strips not more than200mm wide cut from sheets; as flat pieces cut to the dimensions specified in the purchase order. 8 Marking Packages shal
34、l be marked with the following information: a) the IEC publication reference and the type of product, for example371-3-3 Type HS3; b) manufacturers name or trade mark; c) nominal thickness and dimensions; d) number of pieces and/or weight in each package. 1 2 3 4 5 Type Description Maximum binder co
35、ntent Minimum electric strength (kV/mm) Density (%) (g/cm 3 ) HS1 HS2 HS3 HP4 HP5 HP6 Muscovite splittings with organic binder Phlogopite splittings with organic binder Muscovite splittings with silicon resin binder Mica paper with organic binder Mica paper with silicon resin binder Mica paper with
36、inorganic binder 5.0 5.0 10.0 6.0 12.0 7 7 7 7 7 7 1.9 to2.5 2.0 to2.6 1.8 to2.4 2.0 to2.4 1.6 to2.1 EN60371-3-3:1995 BSI 01-2000 5 Annex ZA (normative) Normative references to international publications with their corresponding European publications This European Standard incorporates by dated or u
37、ndated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only wh
38、en incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. NOTEWhen the international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC371
39、-2 1973 Specification for insulating materials based on mica Part2: Methods of test EN60371-3-3 19786 blankBSEN60371-3-3:1995 BSI 01-2000 List of references See national foreword.BS EN 60371-3-3:1995 IEC371-3-3: 1983 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the
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