1、 IEC 60763-2 Edition 2.0 2007-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Specification for laminated pressboard Part 2: Methods of test Spcification pour cartons comprims et contrecolls Partie 2: Mthodes dessai IEC 60763-2:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva,
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16、41 22 919 03 00 IEC 60763-2 Edition 2.0 2007-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Specification for laminated pressboard Part 2: Methods of test Spcification pour cartons comprims et contrecolls Partie 2: Mthodes dessai INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE
17、INTERNATIONALE R ICS 17.220.99; 29.035.10 PRICE CODE CODE PRIX ISBN 2-8318-1045-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60763-2 IEC:2007 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references
18、 .7 3 Conditioning of test specimens.8 4 Drying of test specimens 8 4.1 Method A (preferable) .8 4.2 Method B.8 5 Dimensions 8 5.1 Thickness8 6 Mechanical tests.9 6.1 Flexural strength and load to produce a standard deflection 9 6.2 Apparent modulus of elasticity in flexure .10 7 Compressibility.10
19、7.1 Principle10 7.2 Test apparatus 11 7.3 Test pieces11 7.4 Procedure .11 7.5 Results11 8 Electric strength in oil.12 8.1 General and conditioning.12 8.2 Electric strength along laminate (edgewise electric strength).12 9 Internal ply strength, thermal resistance and oil compatibility .12 9.1 Princip
20、le12 9.2 Test specimens .12 9.3 Test apparatus 13 9.4 Procedure .13 9.5 Determination of the flexural strength13 9.6 Results13 10 Apparent density 14 10.1 Test specimens .14 10.2 Procedure .14 10.3 Results14 11 Moisture content.15 12 Shrinkage in air after drying15 12.1 Test specimens .15 12.2 Proce
21、dure .15 12.3 Results15 13 Oil absorption.15 13.1 Test specimens .15 13.2 Procedure .15 13.3 Results16 14 Ash content 16 14.1 Procedure .16 14.2 Results16 60763-2 IEC:2007 3 15 Contamination of liquid dielectrics 16 15.1 Apparatus16 15.2 Test specimens .16 15.3 Procedure .17 15.4 Results17 16 Conduc
22、tivity of aqueous extract17 16.1 Procedure .17 16.2 Results17 17 pH of aqueous extract 17 Figure 1 Position of test specimen in relation to length, width and thickness of sheet 17 Figure 2 Size of the test specimens and arrangement of the electrodes for testing the electric strength along laminae (e
23、dgewise electric strength)18 Figures 3 and 4 Alternative forms of vented electrodes 19 Table 1 Number of test specimens.13 4 60763-2 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SPECIFICATION FOR LAMINATED PRESSBOARD Part 2: Methods of test FOREWORD 1) The International Electrotechnical Comm
24、ission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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27、nce with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all inter
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32、other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publicatio
33、n. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such pa
34、tent rights. International Standard IEC 60763-2 has been prepared by IEC technical committee 15: Solid electrical insulating materials. This second edition cancels and replaces the first edition published in 1991 and constitutes a technical revision. This edition includes the following significant t
35、echnical changes with respect to the previous edition. a) The standard has generally been revised editorially and brought into line with IEC 60641-2. b) The test method for the determination of the internal ply strength has been replaced with an alternative method. c) The test method for the determi
36、nation of the thermal resistance has been enlarged in its scope. 60763-2 IEC:2007 5 This bilingual version, published in 2009-06, corresponds to the English version. The text of this standard is based on the following documents: FDIS Report on voting 15/360/FDIS 15/373/RVD Full information on the vo
37、ting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. The list of all parts of the IEC 60763 series, under the general title Specification for laminated pressboard, can be found on the IE
38、C website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; withdrawn
39、; replaced by a revised edition, or amended. 6 60763-2 IEC:2007 INTRODUCTION This International Standard deals with laminated pressboard as defined in Clause 2 of IEC 60763-1. IEC 60641 applies to pressboard which is not laminated, and the material covered by this International Standard is made from
40、 sheets conforming to the requirements of that publication. 60763-2 IEC:2007 7 SPECIFICATION FOR LAMINATED PRESSBOARD Part 2: Methods of test 1 Scope This part of IEC 60763 gives methods of test applicable for the material classified in IEC 60763-1. 2 Normative references The following referenced do
41、cuments 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. IEC 60243-1:1998, Electrical strength of insulating materials Test methods P
42、art 1: Tests at power frequencies IEC 60247:2004, Insulating liquids Measurement of relative permittivity, dielectric dissipation factor (tan ) and d.c. resistivity IEC 60250:1969, Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulatin
43、g materials at power, audio and radio frequencies including metre wavelengths. IEC 60296:2003, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgear IEC 60641-2:2004, Pressboard and presspaper for electrical purposes Part 2: Methods of tests IEC 6076
44、3-1:1983, Specification for laminated pressboard Part 1: Definitions, classification and general requirements IEC 61125:1992, Unused hydrocarbon-based insulating liquids Test methods for evaluating the oxidation stability IEC 62021-1:2003, Insulating liquids Determination of acidity Part 1: Automati
45、c potentiometric titration ISO 287:1985, Paper and board Determination of moisture content Oven-drying method ISO 2144:1997, Paper, board and pulps Determination of residue (ash) on ignition at 900 degrees C 8 60763-2 IEC:2007 3 Conditioning of test specimens Since the conditioning of laminated pres
46、sboard is very time-consuming, the material is tested either as received or dried. Only in case of dispute shall the material be conditioned according to the following procedure. The conditioning shall be made at 23 C 2 K and (50 5) % relative humidity until the moisture content of the specimen reac
47、hes 5,5 % to 8 %. The conditioning shall be approached from the dry side after drying at 70 C 5 K for a period sufficient to ensure that the conditioning atmosphere produces a mass increase in the specimen. 4 Drying of test specimens 4.1 Method A (preferable) The test specimens shall be dried at 105
48、 C 2 K for (24 1) h in an oven with forced air circulation and subsequently at 105 C 2 K for (48 2) h in a vacuum chamber at a residual pressure of not more than 1 kPa. The specimens shall then be removed and allowed to cool in a desiccator before the test. 4.2 Method B Test specimens shall be dried
49、 in a ventilated oven at 105 C 2 K for (168 8) h at atmospheric pressure. When test pieces of the specified size are dried according to method B, test results similar to the test results obtained after drying according to method A may be expected. 5 Dimensions 5.1 Thickness 5.1.1 Test apparatus An external screw-type micrometer having measuring faces of 6 mm to
