1、BRITISH STANDARD BS 5626-3.1: 1981 IEC 554-3-1: 1979 Cellulosic papers for electrical purposes Part 3: Specifications for individual materials Section 3.1 General purpose paper IEC title: Specification for cellulosic papers for electrical purposes Part3:Specifications for individual materials. Sheet
2、 1: General purpose electrical paper UDC 621.315.614.6:676.254BS5626-3.1:1981 This British Standard, having been prepared under the directionof the General Electrotechnical Engineering Standards Committee, was published under the authorityofthe Executive Boardand comes into effect on 27 February 198
3、1 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference GEL/16 Draft for comment 78/25660 DC ISBN 0 580 11875 4 Cooperating organizations The General Electrotechnical Engineering Standards Committee, under whose direction this British Standard was prepared
4、, consists of representatives from the following: Associated Offices Technical Committee British Approvals Service for Electric Cables Ltd. British Electrical and Allied Manufacturers Association (BEAMA) British Radio Equipment Manufacturers Association British Steel Corporation British Steel Indust
5、ry Cbmpe Department of Energy (Electricity) Electric Cable Makers Confederation* Electrical Contractors Association Electrical Contractors Association of Scotland Electricity Supply Industry in England and Wales* Electronic Components Industry Federation* Electronic Engineering Association* Engineer
6、ing Equipment Users, Association Era Technology Ltd.* Health and Safety Executive Home Office Institution of Electrical Engineers Ministry of Defence* National Coal Board Oil Companies Materials Association Post Office* Telecommunication Engineering and Manufacturing Association (TEMA)* The organiza
7、tions marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Adhesive Tape Manufacturers Association British (AC) Capacitor Manufacturers Association British Industrial Cera
8、mic Manufacturers Association British Paper and Board Industry Federation (PIF) British Plastics Federation Department of Industry (British Calibration Service) Department of Industry (National Physical Laboratory) Electrical and Electronic and Insulation Association (BEAMA) Electrical Installation
9、Equipment Manufacturers Association (BEAMA) Rotating Electrical Machines Association (BEAMA) The Transmission and Distribution Association (BEAMA) Amendments issued since publication Amd. No. Date of issue CommentsBS5626-3.1:1981 BSI 07-1999 i Contents Page Cooperating organizations Inside front cov
10、er National foreword ii Introduction 1 1 Scope 1 2 Requirements 1 Table I Requirements for Class I: General purpose electrical paper 2 Publications referred to Inside back coverBS5626-3.1:1981 ii BSI 07-1999 National foreword This Section of this British Standard is identical with IEC Publication 55
11、4-3-1“Specification for cellulosic papers for electrical purposes. Part 3: Specifications for individual materials. Sheet 1: General purpose electrical paper” published in 1979 by the International Electrotechnical Commission (IEC). It was prepared under the direction of the General Electrotechnical
12、 Engineering Standards Committee. Other Parts of BS 5626 are given under “Cross-references” in this national foreword. It is the intention that BS 5626 will ultimately replace BS 698:1956 “Papers for electrical purposes” and BS 4295:1968 “Capacitor tissue paper”. A decision on withdrawal of those st
13、andards will be taken at an appropriate stage in the publication, as Part 3 or BS 5626, of the separate specification Sections for the individual materials. Terminology and conventions. The text of the international standard has been approved as suitable for publication as a British Standard without
14、 deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. In the Introduction, the words “This standard is one of a series which deals with” should be read as “BS 5626 deals with” similarly, “The serie
15、s consists of three parts” should be read as “BS 5626 has the three following Parts”. In clause 1 “Scope”, the words “This sheet” should be read as “This Section or BS 5626”. NOTEIn “Table 1 of IEC Publication 554-1”, general heading to columns 6 and 7, and the asterisked footnote, “4m/Pa.s” should
16、be read as “4m/(Pa.s)”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references
17、International standard a Corresponding British Standard IEC 554-1:1977 BS 5626 Cellulosic papers for electrical purposes Part 1:1979 Definitions and general requirements (Identical) IEC 554-2:1977 BS 5626 Cellulosic papers for electrical purposes Part 2:1979 Methods of test (Identical) ISO 186:1977
18、b BS 3430:1980 Method for sampling for testing paperandboard (Identical) a Updated in the text. b Published by the International Organization for Standardization (ISO). Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1to 6, an inside back cover and
19、 a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5626-3.1:1981 BSI 07-1999 1 Introduction This standard is one of a series which deals with insulating cellulosic pape
20、rs. The series consists of three parts: Part 1: Definitions and general requirements (IEC Publication 554-1); Part 2: Methods of test (IEC Publication 554-2); Part 3: Specifications for individual materials. 1 Scope This sheet contains the requirements for general purpose electrical paper as describ
21、ed in Table I of IEC Publication 554-1. 2 Requirements 2.1 For sampling procedures, see ISO Standard186:Paper and board sampling for testing. 2.2 The paper shall comply with the general requirements published in Part 1 (IECPublication554-1). 2.3 When tested by the methods stipulated, the paper shall
22、 comply with the requirements given in Table I. Table I of IEC Publication 554-1 Class Type Further description of kraft insulating paper Symbol Description Conductivity of aqueous extract (mS/m) Air permeability (4 4m/Pa.s) Symbol Description Symbol Description (1) (2) (3) (4) (5) (6) (7) 1. Genera
23、l purpose electrical purpose 1.1 Kraft insulating paper apparent density k 0.75 g/cm 3 1 0.75 . k 0.85 g/cm 3 1.3 Kraft insulating paper apparent density 0.85 . k 0.95 g/cm 3 M 0.05 . k 0.5 1.4 Kraft insulating paper apparent density 0.95g/cm 3 2 4 H 0.5 1.5 Greaseproof paper 1.6 Japanese tissue pap
24、er 1.7 Manila paper Complete designation is formed by combining the symbols in columns 2,4 and 6 in the above according to the following example a . 1.8 Manila/kraft mixture paper Conductivity of aqueous extract and air permeability symbols are applicable only for types 1.1 to 1.4. a Example 1.22M =
25、 apparent density greater than 0.75 and not exceeding 0.85 g/cm 3 , conductivity over 4mS/m and air permeability “medium” between 0.05 and 0.5 4m/Pa.s. BS5626-3.1:1981 2 BSI 07-1999 Table I Requirements for class I: General purpose electrical paper Property Test method in Part 2 (clause) Type Unit R
26、equirements Remarks Thickness 2 1.11.5 4mmmmmm Tolerance 10 % 1.6 Tolerance 20 % 1.71.8 Tolerance 10 % Substance (grammage) 3 1.11.5 g/m 2 For materials k 45 g/m 2 : 10 % For materials 45 g/m 2 : 5 % 1.61.8 To be agreed between supplier and purchaser Apparent density 4 1.11.5 g/cm 3 0.05 g/cm 3from
27、the nominalvalue The description of types1.1 to 1.4 in Part1 refers to nominal values of apparent density 1.61.8 To be agreed between supplier and purchaser Tensile strength expressed as tensile index 5 1.1 L Nm/g Machine direction Cross-direction NOTETo calculate tensile strength and breaking, leng
28、th, use the expressions: 1.2 minimum minimum 1.3 88 32 1.4 1.1 M 83 30 1.2 where 1.3 = tensile strength (kN/m) Y = tensile index (Nm/g) W = substance (g/m 2 ) L = breaking length (inkilometres) 1.4 1.1 H 78 28 1.2 1.3 1.4 1.5 74 26 1.6 78 10 1.7 74 25 1.8 74 25 Elongation at break 5 All % Machine di
29、rection: 2 Cross-direction: 4 X YW 10 3 - , = L Y 9.81 - = X BS5626-3.1:1981 BSI 07-1999 3 Table I Requirements for class I: General purpose electrical paper Property Test method in Part 2 (clause) Type Unit Requirements Remarks Internal tearing resistance (expressed as tear index) 6 1.11.4 mNm 2 /g
30、 Substance (g/m 2 ) MD CD MD : machine direction CD : cross-direction 80120 6 7 above 120 8 9 1.5 5 6 1.6 6.4 10.7 1.7 4080 8 10 80120 9 11 above 120 10 12 1.8 4080 7 9 80120 8 10 above 120 10 12 Edge tearing resistance 7 All N Under consideration Folding endurance 9 All Number of double folds Under
31、 consideration One of the ISO practices is to express results in log 10of double folds Moisture content 10 All % Maximum 8 Ash 11 1.11 % Maximum 0.50 1.21 1.31 1.41 1.12 Maximum 1.00 1.22 1.32 1.42 1.5, 1.7 and 1.8 Maximum 1.00 1.6 Maximum 2.00BS5626-3.1:1981 4 BSI 07-1999 Table I Requirements for c
32、lass I: General purpose electrical paper Property Test method in Part 2 (clause) Type Unit Requirements Remarks Conductivity of aqueous extract 12 1.11 mS/m k 4.0 1.21 1.31 1.41 1.12 k 10.0 1.22 1.32 1.42 1.5, 1.8 Maximum 10.0 1.7 Maximum 12.0 1.6 Test not applicable pH of aqueous extract 13 1.11.8
33、6.08.0 Chloride content of aqueous extract 14 mg/kg Under consideration Conductivity of organic extract 16 1.11.4 nS/m Maximum 10 By agreement between purchaser and supplier 1.51.8 Test not applicable Dissipation factor of organic extract 17 Under consideration By agreement between purchaser and sup
34、plier Air permeability (air permeance) 18 1.1 4mm/Pa.s When a value of air permeability is specified by the purchaser, it shall not deviate from this value by more than 33 %. For Type L, the nominal value shall be less than or equal to 0.05. For type M, it shall be greater than 0.05 and less or equa
35、l to 0.5 and for Type H, greater than0.5. 1.2 1.3 1.4 1.5 0.03 max. 1.61.8 Test not applicableBS5626-3.1:1981 BSI 07-1999 5 Table I Requirements for class I: General purpose electrical paper Property Test method in Part 2 (clause) Type Unit Requirements Remarks Water absorption (Klemm method) 19 1.1
36、 L mm U 5 ISO refers to this property as capillary rise 1.2 1.3 1.4 Not applicable to types 1.5 to 1.8 1.1 M U 10 1.2 1.3 1.4 1.1 H U 10 1.2 1.3 1.4 Electric strength (a.c.) 21 kV/mm Air permeability Type L Type M Type H The electric strength may be determined at room temperature on specimens dried
37、at 105 C for 2 h but care will be needed to ensure that moisture regain will not significantly affect the result. In case of dispute, the test at90 C shall be the reference method min. min. min. 1.1 7.0 6.5 1.2 8.0 7.5 7.0 1.3 8.5 8.0 7.0 1.4 9.0 8.0 1.5 9.0 1.6 10.0 1.7 6.0 1.8 6.0 Dissipation fact
38、or of unimpregnated paper 22 Under consideration Permittivity of unimpregnated paper 22 Under consideration Dissipation factor of impregnated paper 22 Under consideration BS5626-3.1:1981 6 BSI 07-1999 Table I Requirements for class I: General purpose electrical paper Property Test method in Part 2 (
39、clause) Type Unit Requirements Remarks Permittivity of impregnated paper 22 Under consideration Conducting paths 23 Method 1 (roller and plate) 1.11.8 Number of conducting paths per square metre Optional test when agreed between purchaser and supplier; the number of conducting paths is also the subj
40、ect of agreement Heat stability 24 1.11.4 % To be agreed between purchaser and supplier Two procedures are available: 1) heat treatment at 120 C for168 h, or 2) heat treatment at 150 C for24 h The heat treatment is subject to agreement between purchaser and supplier 1.5 Test not applicable 1.6 40 %
41、decrease in bursting 1.7 20 % strength after 1.8 20 % heat treatment BS5626-3.1:1981 BSI 07-1999 Publications referred to See national foreword.BS 5626-3.1: 1981 IEC 554-3-1: 1979 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible
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