1、BRITISH STANDARD BS5626-3.3: 1982 IEC554-3-3: 1980 Cellulosic papers for electrical purposes Part3: Specifications for individual materials Section3.3 Crpe paper IEC title: Specification for cellulosic papers for electrical purposes Part3: Specifications for individual materials Sheet3:Crpe paper UD
2、C 621.315.614.6:676.267.6BS5626-3.3:1982 This British Standard, having been prepared under the directionof the General Electrotechnical Engineering Standards Committee, was published under the authority ofthe Board of BSI and comes into effect on 29 January1982 BSI09-1999 The following BSI reference
3、s relate to the work on this standard: Committee reference GEL/16 Draft for comment79/29671DC ISBN 0 580 12521 1 Cooperating organizations The General Electrotechnical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the foll
4、owing: 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 Department of Energy (Electricity) Department of Industry Elect
5、ric 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* Energy Industries Council Engineering Equipment Users Asso
6、ciation 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)* Trades Union Congress The organizatio
7、ns 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 Ceramic
8、 Manufacturers Association British Paper and Board Industry Federation (PIF) British Plastics Federation British Telecom Covered Conductors Association Department of Industry (British Calibration Service) Department of Industry (National Physical Laboratory) Electrical and Electronic and Insulation
9、Association (BEAMA) Electrical Installation Equipment Manufacturers Association (BEAMA) Rotating Electrical Machines Association (BEAMA) The Transmission and Distribution Association (BEAMA) Amendments issued since publication Amd. No. Date of issue CommentsBS5626-3.3:1982 BSI 09-1999 i Contents Pag
10、e Cooperating organizations Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Requirements 1 3 Method of describing requirements 1 Table I Requirements for Class3 Crpe paper 2 Publications referred to Inside back coverBS5626-3.3:1982 ii BSI 09-1999 National foreword This Section of
11、this British Standard, published under the direction of the General Electrotechnical Engineering Standards Committee, is identical with IEC Publication554-3-3“Specification for cellulosic papers for electrical purposes. Part3: Specifications for individual materials. Sheet3: Crpe paper” published in
12、1980 by the International Electrotechnical Commission (IEC). Other Parts of BS5626 are given under “Cross-references” in this national foreword. It is the intention that BS5626 will ultimately replace BS698:1956 “Papers for electrical purposes”, BS4295:1968 “Capacitor tissue paper” and BS5068:1974 “
13、Specification for crpe paper for electrical purposes”. A decision on the withdrawal of those standards will be taken at the appropriate stage in the publication of Part3 of this British Standard. Terminology and conventions. The text of the International Standard has been approved as suitable for pu
14、blication as a British Standard without 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
15、5626 deals with”. Similarly, “The series consists of three parts” should be read as “BS5626 has the three following Parts”. In clause1 “Scope”, the words “This sheet” should be read as “This Section of BS5626”. In2.3, “Sheet1 of Part3” should be read as “Section3.1 of Part3”. Where the expression “s
16、hall be as agreed between the purchaser and manufacturer” appears (twice) in the “Remarks” column of Table1 this should be read as “should be as stated in the documentation” (see also “Additional information” for the status of the information in the “Remarks” column of Table1). Additional informatio
17、n In Table1, (on page2), as there is no method in Part2, the mandatory test method for the determination of the hill count is given in the “Remarks” column. There are no requirements in this standard for “thickness” or “hill count”. Some considerations involved in the choice of suitable values are g
18、iven in the “Remarks” column; clearly, no mandatory requirements are involved and where “shall” is used this should be read as “should”. Cross-references International Standard a Corresponding British Standard IEC554-1:1977 BS5626 Cellulosic papers for electrical purposes Part1:1979 Definitions and
19、general requirements (Identical) IEC554-2:1977 BS5626 Cellulosic papers for electrical purposes Part2:1979 Methods of test (Identical) IEC554-3-1:1979 (also referred to as Sheet1 of Part3) BS5626 Cellulosic papers for electrical purposes Part3: Specifications for individual materials Section3.1:1981
20、 General purpose paper (Identical) ISO186-1977 b BS3430:1980 Method for sampling for testing paper and board (Identical) a Undated in the text. b Published by the International Organization for Standardization.BS5626-3.3:1982 BSI 09-1999 iii A British Standard does not purport to include all the nec
21、essary 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. Summary of pages This document comprises a front cover, an inside front cover, pagesi to iv, pages1
22、to4, 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 amendment table on the inside front cover.iv blankBS5626-3.3:1982 BSI 09-1999 1 Introduction This standard is one of a series which
23、deals with insulating cellulosic papers. The series consists of three parts: Part1: Definitions and general requirements (IEC Publication554-1); Part2: Methods of test (IEC Publication554-2); Part3: Specifications for individual materials. Sheet1: General Purpose Electrical Paper and Sheet4: Electro
24、lytic Capacitor Paper have already been published. Sheet3 Class3: Crpe paper 1 Scope This sheet contains the requirements for crpe paper, as defined in IEC Publication554-1, Part1: Definitions and General Requirements, classified as: 2 Requirements 2.1 General The paper shall comply with the general
25、 requirements of IEC Publication554-1. 2.2 Sampling The sampling procedures shall be as given in ISO Standard186:1977: Paper and Board Sampling for Testing. 2.3 Primary and secondary crpe The paper may be either of the following: a) primary crpe is defined as a crpe paper made by a technique which d
26、oes not include an intermediate stage as a dry, plane web of base paper; b) secondary crpe is defined as a crpe paper made first as a dry, plane web of base paper and then cropped by a subsequent process. The base paper of secondary crpe of Types3.1 and3.2 shall comply with all the requirements in S
27、heet1: General Purpose Electrical Paper, of Part3 (IEC Publication554-3-1). For primary crpe, the fibres and their preparation shall be the same as for paper complying with the requirements of Sheet1 of Part3 of this standard. 2.4 Testing When tested by the methods stipulated, the paper shall comply
28、 with the requirements listed in Table I. 3 Method of describing requirements When ordering crpe paper, a purchaser should quote the type designation, as given above, and in addition should specify the substance of the base paper and the elongation at break of the crpe paper. If subsequent calenderi
29、ng is required, this should be specified by the letterC. The purchaser should also specify whether the crping is to be coarse, medium, or fine. Coarse crpe paper normally has a hill count (see Table I) of up to eight counts per10mm, medium crpe a count of between eight and twelve per10mm, and fine c
30、rpe a count greater than twelve per10mm. Examples a) “3.1-70-80C” would specify a hard base paper, with an air permeability of symbol M or L and a substance of70g/m 2crped to give a nominal elongation at break of80%and subsequently calendered. The addition of “fine” would indicate that a fine crpe i
31、s required. b) “3.2-90-50” would specify a soft base paper with an air permeability of symbol H and with a substance of90g/m 2crped to give a nominal elongation at break of50%. The addition of “coarse” would indicate that a coarse crpe is required. The preferred nominal values for elongation at brea
32、k are20%,30%,50%,80%,120%,200% and300%. (These values are based on the R40 series of preferred numbers.) Type3.1: A hard, comparatively non-absorbent, crimped kraft insulating paper made from base papers of low (L) or medium (M) permeability, such as Types1.3-2M and1.3-2L described in TableI of IEC
33、Publication554-1. Type3.2: A soft, porous, crped kraft insulating paper made from base papers of high (H) permeability, such as Type1.2-2H described in TableI of IEC Publication554-1.BS 5626-3.3:1982 2 BSI 09-1999 Table I Requirements for Class3 Crpe paper Property Test method in Part2 Type Unit Req
34、uirements Remarks Thickness 2 All Crpe papers are not required to conform to the tolerances on thickness given in Part1; and, in most cases, the thickness is governed by other specified properties, and is of less importance than are those properties. Where thickness is a property of importance (as,
35、for example, on crpe papers that have been calendered), the nominal values and tolerances shall be as agreed between the purchaser and manufacturer. In all cases, care shall be taken when handling the paper during the sampling and testing procedures not to stretch the paper. Hill count All Counts pe
36、r 10mm Shall be determined as follows: Place a piece of paper (sampled without stretching) without restraint on a flat surface. Place a linear scale on the test piece parallel to the machine direction of the paper and illuminate the surface of the paper obliquely so as to cast deep shadows. Count th
37、e number of major folds (hills) in the paper over a total distance of50mm, using an optical magnifier. Repeat the measurement on a different length of50mm. Take the total of the two counts, divide by10, and record the hill count as the number of peaks per10mm. The limits for hill count shall be as a
38、greed between the purchaser and the manufacturer. Appropriate values for a given paper will depend upon the density and substance of the base paper, the amount of stretch and various details of the crping operation, and can vary from less than8to more than20per10mm. In general, the hill count will i
39、ncrease with decreasing paper density or substance, or with increasing elongation at break.BS 5626-3.3:1982 BSI 09-1999 3 Table I Requirements for Class3 Crpe paper Property Test method in Part2 Type Unit Requirements Remarks Tensile strength expressed as extended tensile index 5 3.1 3.2 Extended te
40、nsile index Nm/g 39machine direction minimum 33machine direction minimum The tensile strength expressed as tensile index shall be defined as: where: Y =extended tensile index, Nm/g X =tensile strength, kN/m W =measured substance of crpe paper, g/m 2 E =percentage elongation Elongation at break 5 All
41、 % The elongation at break shall be within15% of that specified by the purchaser, calculated as a percentage of the percentage elongation specified Moisture content 10 All % 8maximum calculated on the original mass of the test piece Ash 11 All % 1 maximum Conductivity of aqueous extract 12 All mS/m
42、10 maximum pH of aqueous extract 13 All 68 Y 10 3 X W - 100E + 100 - =4 blankBS5626-3.3:1982 BSI 09-1999 Publications referred to See national foreword.BS5626-3.3: 1982 IEC554-3-3: 1980 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body respo
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