1、BRITISH STANDARD BS EN 60371-2:2004 Incorporating Corrigendum No.1 Specification for insulating materials based on mica Part 2: Methods of test The European Standard EN 60371-2:2004 has the status of a British Standard ICS 17.220.99; 29.035.50 BS EN 60371-2:2004 This British Standard was published u
2、nder the authority of the Standards Policy and Strategy Committee on 26 November 2004 BSI 26 November 2004 ISBN 0 580 44879 7 National foreword This British Standard is the official English language version of EN 60371-2:2004. It is identical with IEC 60371-2:2004. It supersedes BS EN 60371-2:1997,
3、which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/15, Insulating material, to GEL/15/3, Material specifications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. C
4、ross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or
5、of British Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquirers to understand the text;
6、 present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover
7、, an inside front cover, the EN title page, pages 2 to 31 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15505 Corrigendum No.1 10 December 2004 Correction to supersession i
8、nformation.EUROPEAN STANDARD EN 60371-2 NORME EUROPENNE EUROPISCHE NORM November 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Bru
9、ssels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60371-2:2004 E ICS 17.220.99; 29.035.50 Supersedes EN 60371-2:1997English version Specification for insulating materials based on mica Part 2: Methods of test (IEC 60371-2
10、:2004) Spcification pour les matriaux isolants base de mica Partie 2: Mthodes dessais (CEI 60371-2:2004) Bestimmung fr Isoliermaterialien aus Glimmer Teil 2: Prfverfahren (IEC 60371-2:2004) This European Standard was approved by CENELEC on 2004-09-01. CENELEC members are bound to comply with the CEN
11、/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 obtained on application to the Central Secretariat or to
12、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 Central Secretariat has the same status as the official v
13、ersions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Sp
14、ain, Sweden, Switzerland and United Kingdom. Foreword The text of document 15C/1610/FDIS, future edition 3 of IEC 60371-2, prepared by SC 15C, Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60371-2 on 2004-09-01. T
15、his European Standard supersedes EN 60371-2:1997. The main changes with respect to EN 60371-2:1997 are as follows: a) All clauses re-numbered. b) Relevant template of ISO 67 has been added to this standard as Annex A. c) Clause 8: Tensile strength and elongation at break Procedure modified to give “
16、rate of movement“ instead of “time limit“. Different rate of movement for raw mica as opposed to reinforced and/or impregnated mica. d) Clause 11: Stiffness Size of test specimen revised. wording modified so that standard covers materials using carriers other than woven glass cloth and materials tha
17、t are 3-ply. Revision of terms “machine direction“ and “transverse direction“. e) Clause 13: Elastic compression and plastic compression Tolerance on measurement of height of stack changed to within 0,01 mm. Times for change in pressure in procedure changed to 1 min. f) Clause 16: Electric strength
18、Modified in line with Amendment 1:1994 to IEC 60371-2:1987 (included in EN 60371-2:1997). Changes relate to latest edition of EN 60243-1. g) Clause 19: Detection of defects and conductive particles Revised subclause. The following dates were fixed: latest date by which the EN has to be implemented a
19、t national level by publication of an identical national standard or by endorsement (dop) 2005-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standa
20、rd IEC 60371-2:2004 was approved by CENELEC as a European Standard without any modification. _ Page2 EN603712:2004 CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Preparation methods of test specimens for curable materials .6 3.1 General .6 3.2 Method 1.6 3.3 Method 2.7 4 Thickness.8 4
21、.1 Test apparatus 8 4.2 Test specimen.8 4.3 Procedure .9 4.4 Statement of results 10 5 Density.10 6 Calculated density10 7 Composition .10 7.1 Test specimen.10 7.2 Mass per unit area in the “as received“ condition 10 7.3 Content of volatiles and mass per unit area of dried material.10 7.4 Binder con
22、tent.11 7.5 Mass per unit area of reinforcement material (m r ).12 7.6 Mica content13 7.7 Size of splittings13 8 Tensile strength and elongation at break 14 8.1 Test apparatus 14 8.2 Test specimen.14 8.3 Procedure .14 8.4 Statement of results 14 9 Flexural strength and elastic modulus in bend 15 9.1
23、 Test specimen.15 9.2 Procedure .15 10 Folding .15 11 Stiffness .15 11.1 Conditioning and test atmosphere .15 11.2 Test specimens .15 11.3 Procedure .15 11.4 Statement of results 16 12 Resistance to exudation and displacement .16 12.1 Test apparatus 16 12.2 Test specimen.16 12.3 Procedure .16 12.4 S
24、tatement of results 17 13 Elastic compression and plastic compression .17 13.1 Test apparatus 17 13.2 Test specimen.17 Page3 EN603712:2004 12.4 Statement of results 17 13 Elastic compression and plastic compression .17 13.1 Test apparatus 17 13.2 Test specimen.17 13.3 Procedure .17 13.4 Statement of
25、 results 18 14 Resin flow and consolidation 18 14.1 Test specimen.18 14.2 Procedure .18 14.3 Statement of results 19 15 Gel time .19 16 Electric strength .19 16.1 Electrodes.19 16.2 Test specimen.20 16.3 Procedure .20 16.4 Statement of results 20 17 Dissipation factor/temperature characteristics at
26、frequencies of between 48 Hz and 62 Hz.20 17.1 Test specimen.20 17.2 Test conditions20 17.3 Electrodes.20 17.4 Procedure .20 17.5 Statement of results 21 18 Dissipation factor/voltage characteristics at frequencies of between 48 Hz and 62 Hz 21 18.1 Test specimen.21 18.2 Test conditions21 18.3 Elect
27、rodes.21 18.4 Procedure .21 18.5 Statement of results 21 19 Detection of defects and conductive particles .21 20 Penetration.21 20.1 Test apparatus 21 20.2 Test specimens .22 20.3 Method of test .22 20.4 Statement of results 22 21 Thermal endurance 22 (normative) .27 Figure 1 Assembly of stacks for
28、preparing test laminates.23 Figure 2 Conditions for press procedure 23 Figure 3 Apparatus for measurement of stiffness .24 Figure 4 Apparatus for measurement of stiffness .24 Figure 5 Elastic compression, plastiac compression.25 Figure 6 Standard Williams type penetrometer.26 Page4 EN603712:2004 INT
29、RODUCTION This part of IEC 60371 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. IEC 60371 consists of three parts under the main title Specific
30、ation for insulating materials based on mica: Part 1 Definitions and general requirements Part 2 Methods of test Part 3 Specifications for individual materials Page5 EN603712:2004 SPECIFICATION FOR INSULATING MATERIALS BASED ON MICA Part 2: Methods of test 1 Scope This part of IEC 60371 defines the
31、methods of test which are applicable to built-up mica materials, products based on them and mica paper. 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
32、latest edition of the referenced document (including any amendments) applies. IEC 60216 (all parts), Electrical insulating materials Thermal endurance properties IEC 60243-1:1998, Electrical strength of insulating materials Part 1: Tests at power frequencies IEC 60250:1969, Recommended methods for t
33、he determination of the permittivity and dielectric dissipation factor of electric insulating materials at power, audio and radio frequencies including metre wavelengths IEC.60371-3 (all parts), Specification for insulating materials based on mica Part 3: Specifications for individual materials ISO
34、178:2001, Plastics Determination of flexural properties 3 Preparation methods of test specimens for curable materials 3.1 General Test specimens are prepared in accordance with the following methods which are applicable only to curable materials. 3.2 Method 1 Clean off all loose particles and projec
35、ting fibres from sufficient material to provide the test pieces required for the particular test. Cut and stack the pieces required to form the test laminate. For tape material, build up the laminate to the required thickness using half-lapped layers with successive layers at right angles, where nec
36、essary cutting the sides to obtain the required dimensions. Adjust the press temperature to 160 C 5 K, unless otherwise specified. Page6 EN603712:2004 Place the test laminate in the centre of two caul plates not exceeding 1,5 mm in thickness and at a temperature of 15 C to 35 C. Insert stops of a si
37、ze to provide the required test laminate thickness. Insert the assembly of plates and the test piece in the centre of the preheated press. Close the press immediately and apply sufficient pressure to reach stops. Cure the test piece for a minimum of 30 min. Remove the test piece and post-cure for th
38、e length of time and at the temperature given in IEC 60371-3 or according to the recommendation of the supplier. Unless otherwise specified, condition the test piece for 24 h in a controlled atmosphere of (50 5) % r.h. and at 23 C 2 K before the test. 3.3 Method 2 Clean off all loose particles and p
39、rojecting fibres from sufficient material to provide the test sheets required for the particular test. For full-width and sheet material, cut and stack the sheets required to form the test laminate. There are two suggested ways of producing a laminate from tape material: a) Cut the tape in pieces to
40、 the length of the laminate. Stack the pieces parallel and half- overlapped. The second and following layers shall be moved sideways, so that the overlapping edges do not lie one upon another. In order to fix the pieces, the use of a hot iron is recommended. b) Take a metal sheet of the size of the
41、required laminate and of a thickness of 2 mm to 3 mm. Wind the tape half-overlapped and always in the same direction around this sheet until the required thickness is reached. It is recommended to start each layer separately and to move the second and the following layers sideways, so that the overl
42、apping edges do not lie one upon another. It is necessary to put an interleaving release material between the metal sheet and the tape. Two laminates with the same thickness are formed. The prepared stacks, having a composition as shown in Figure 1, shall be put in the press. The following press pro
43、cedure, illustrated in Figure 2, provides an example: Close the cold press and bring it to a pressure of 0,15 MPa. Heat the press to 70 C under pressure of 0,15 MPa. Reduce the pressure down to zero, open the press for a short time (ventilate). Heat the press to 90 C under pressure of 0,15 MPa. Redu
44、ce the pressure down to zero, open the press for a short time (ventilate). Heat the press to 110 C under pressure of 0,15 MPa. Reduce the pressure down to zero, open the press for a short time (ventilate). Heat the press to 160 C 5 K under pressure of 0,15 MPa until the resin starts to gel. This poi
45、nt of time is visually controlled by a test rod. As soon as the resin starts to gel, bring the pressure up to 3 MPa. Page7 EN603712:2004 Cure under 3 MPa and 160 C for 60 min or at a temperature otherwise specified. Specimen to be cooled under pressure. After this press procedure, post-cure the lami
46、nate for the time and temperature specified in the specification sheets of IEC 60371-3 or according to the recommendation of the supplier. Other press procedures shall be subject to contract. 4 Thickness 4.1 Test apparatus Depending on the materials to be tested, the apparatus for measuring thicknes
47、s is as follows: 4.1.1 A constant pressure measurement device having flat measuring faces of 6 mm to 8 mm diameter, the graduations being in divisions of 0,01 mm and permitting reading to within 0,005 mm. The pressure exerted on the specimen shall be 0,1 MPa 10 %. The accuracy of measurement, when c
48、hecked by a setting gauge, shall be within 0,005 mm. Measurement shall be made at ambient temperature and at least 5 s after the application of pressure. 4.1.2 A device as described in 4.1.1, but with a pressure of 0,7 MPa 10 % exerted on the specimen. 4.1.3 A device as described in 4.1.1, but with
49、a pressure of 7,0 MPa 10 % exerted on the specimen. 4.1.4 Test apparatus capable of producing a constant pressure of 30 MPa 10 % uniformly distributed over the faces of the test specimen. It shall consist of a press with parallel plates and a system permitting measurement within 0,02 mm. 4.2 Test specimen 4.2.1 Where the material is delivered in plates or in sheets, the test specimen shall c
