1、BRITISH STANDARD BS 5626-1: 1979 IEC 554-1: 1977 Incorporating Amendment No.1 Cellulosic papers for electrical purposes Part 1: Definitions and general requirements UDC 621.315.614.6:676.254BS5626-1:1979 This British Standard, having been prepared under the directionof the General Electrotechnical E
2、ngineering Standards Committee, was published under the authority ofthe Executive Board on 31January1979 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference GEL/16 Draft for comment 77/31025 DC ISBN 0 580 10616 0 Cooperating organizations The General Ele
3、ctrotechnical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee British Approvals Service for Electric Ca
4、bles Ltd British Electrical and Allied Manufacturers Association (BEAMA) British Radio Equipment Manufacturers Association British Steel Corporation Department of Energy Electricity Electric Cable Makers Confederation Electrical Contractors Association Electrical Contractors Association of Scotland
5、Electrical, Electronic, Telecommunications Plumbing Union Electrical Research Association* Electricity Supply Industry in England and Wales* Electronic Components Industry Federation* Engineering Equipment Users Association Health and Safety Executive Home Office Institution of Electrical Engineers
6、Ministry of Defence* National Coal Board Oil Companies Materials Association Post Office* Telecommunication Engineering and Manufacturing Association (TEMA)* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted
7、 with the preparation of this British Standard: Adhesive Tape 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 I
8、nsulation Association (BEAMA) Rotating Electrical Machines Association (BEAMA) Transmission and Distribution Association (BEAMA) Amendments issued since publication Amd. No. Date of issue Comments 5569 March 1987 Indicated by a sideline in the marginBS5626-1:1979 BSI 01-2000 i Contents Page Cooperat
9、ing organizations Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Definitions 1 3 Designation 2 4 General requirements 2 5 Thickness 2 6 Conditions of supply 2 Table I 3 Publications referred to Inside back coverBS5626-1:1979 ii BSI 01-2000 National foreword This Part of this Brit
10、ish Standard is identical with IEC Publication554-1 “Specification for cellulosic papers for electrical purposes” Part 1:1977 “Definitions and general requirements” including Amendment No.1 published in1983. It has been prepared under the direction of the General Electrotechnical Engineering Standar
11、ds Committee. Other Parts of BS5626 are as given under “Cross-references” in this national foreword. It is the intention that BS5626 will ultimately replace BS698:1956 “Papers for electrical purposes” and BS4295:1968 “Capacitor tissue paper”. A decision on withdrawal of those standards will be taken
12、 at an appropriate stage in the publication, as Part3 of BS5626, of the separate specification Sheets for the individual materials. Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some termin
13、ology 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 interpreted as “BS5626 deals with”; similarly, “This series will have the
14、 three following parts” should be interpreted as “BS5626 will have the three following Parts”. In clause1 (“Scope”), the words “This part of the standard” should be interpreted as “This Part of BS5626” or “This Part of this British Standard”. In connection with the definition “Substance (grammage)”,
15、 there is a movement within the UK paper industry towards adoption of the ISO term “grammage”. NOTETextual errors. When adopting the text of the International Standard, the errors listed below were noticed. They have been reported to the International Electrotechnical Commission in a proposal to ame
16、nd the text of the International Standard. Clause5, line 1: “micrometers” should be read as “micrometres”. Table I, general heading to columns6 and7, and asterisked footnote toTable I. “4m/Pa.s” should be read as “4m/(Pa.s)”. Table I, column7 (“Air permeability. Description”): “0.05.u 5.0” should be
17、 read as“0.05.u 0.5”. Cross-references International Standard a Corresponding British Standard IEC554-2:1977 BS5626 Cellulosic papers for electrical purposes Part2:1979 Methods of test (Identical) Part 3 of IEC 554 (To be published, in a continuingproject, as separate specification Sheets each deali
18、ngwith a specific materialor group of materials; some Sheets are in course of preparation and others under consideration.) BS 5626 Cellulosic papers for electrical purposes Part 3 Specifications for individual materials (provisional title) (It is intended to adopt each IEC Sheet as a dual-numbered S
19、ection of Part3 of BS5626.) a Undated in the text.BS5626-1:1979 BSI 01-2000 iii 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 c
20、onfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages1to4, 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
21、in the amendment table on the inside front cover.iv blankBS5626-1:1979 BSI 01-2000 1 Introduction This standard is one of a series which deals with cellulosic papers for electrical purposes. It does not deal with papers containing modified cellulose. This series will have the three following parts:
22、Part 1: Definitions and General Requirements; Part 2: Methods of Test; Part 3: Specifications for Individual Materials (under consideration). 1 Scope This part of the standard contains the definitions related to and the general requirements to be fulfilled by cellulosic papers for electrical purpose
23、s. 2 Definitions kraft insulating paper paper made entirely from soft-wood pulp manufactured by the sulphate process greaseproof paper paper free from mechanical pulp having a high resistance to penetration by grease. This resistance is obtained by heavy beating which gives the paper the appearance
24、of vegetable parchment japanese tissue paper a lightweight paper characterized by long fibres and a high ratio of tensile strength in the machine direction to tensile strength in the cross-direction manila paper paper made entirely from Manila hemp fibre manila/kraft mixture paper paper made from Ma
25、nila hemp fibre with the addition of kraft soft-wood pulp manufactured by the sulphate process NOTEIf the furnish is required to contain a definite proportion of Manila hemp fibre, this proportion should be specifically stated in the enquiry and/or order. kraft capacitor paper a lightweight paper ma
26、de entirely from soft-wood pulp manufactured by the sulphate process. The pulp is subjected to thorough washing to remove, as far as practicable, the chemicals used in manufacture electrolytic capacitor paper paper for separating electrodes in electrolytic capacitors and for containing the electroly
27、te air permeability the amount of air passing through the paper, per unit time reduced to unit surface area and unit pressure difference between opposite faces of the paper under specified test conditions apparent density the mass per unit area, in grams per square metre, divided by the thickness, i
28、n micrometres, and expressed as grams per cubic centimetre breaking length the calculated limiting length of a strip of paper of any uniform width, beyond which, if the strip was suspended by one end, it would break under its own weight bursting strength the maximum pressure paper can sustain under
29、conditions specified in the test method central value the middle value of an odd number of test results or the mean of the two middle values of an even number of test results when these results are arranged in ascending order of magnitudeBS5626-1:1979 2 BSI 01-2000 crping a process of imparting an i
30、rregular close crimp to the paper to increase its thickness and its extensibility in the machine direction crpe paper paper that has been subjected to crping glazed a paper having a lustrous surface finish imparted by an appropriate drying or mechanical finishing process substance (grammage) the mas
31、s per unit area expressed in grams per square metre. The term “grammage” has been accepted in ISO to replace the term “substance”; however, because of electrical engineering practice of using the word “substance”, it will be used here 3 Designation Papers shall be identified by a type number consist
32、ing of a class number followed by a hyphen and the number of the paper on the corresponding specification sheet. The papers are identified as shown inTable I. 4 General requirements All material in any one consignment shall be as consistent as possible and have properties within the limits of this s
33、tandard throughout the consignment. 5 Thickness Unless specially agreed between purchaser and supplier, the nominal thickness in micrometers shall be one of the following: general purpose electrical papers:152025506575100125160200250; capacitor paper:5677.58910121518202530; electrolytic capacitor pa
34、per: types 4.1 and 4.2:3045607590; type 4.3:101215. When determined in accordance with Clause2 of IEC Publication554-2, Specification for Cellulosic Papers for Electrical Purposes, Part2: Methods of Test, the measured thickness shall be within 10% of the nominal value, unless otherwise stipulated in
35、 Part3 of IEC Publication554 (under consideration). 6 Conditions of supply The paper shall be placed in a packing which ensures adequate protection during transport, handling and storage. The type, batch reference number, thickness of paper, outer diameter and width of roll, mass of roll and date of
36、 manufacture, shall be clearly marked on the outside of each package.BS5626-1:1979 BSI 01-2000 3 Table I IMPORTANT NATIONAL NOTE. See national foreword regarding textual errors in Table I. Class Type Further description of kraft insulating paper Symbol Description Conductivity of aqueousextract (mS/
37、m) Air permeability (4m/Pa.s) Symbol Description Symbol Description (1) (2) (3) (4) (5) (6) (7) 1. General purpose electrical paper 1.1 Kraft insulating paper apparent density u 0.75g/cm 3 1 0.75.u 0.85 g/cm 3 M 0.05.u 5.0 1.3 Kraft insulating paper apparent density 0.85. u 0.95 g/cm 3 1.4 Kraft ins
38、ulating paper apparent density 0.95 g/cm 3 2 4 H 0.5 1.5 Greaseproof paper 1.6 Japanese tissue paper Complete designation is formed by combining the symbols in columns 2, 4 and 6 in the table above according to the following example a Conductivity of aqueous extract and air permeability symbols are
39、applicable only for types1.1 to1.4. 1.7 Manila paper 1.8 Manila/kraft mixture paper 2. Capacitor paper 2.1 Kraft capacitor paper 2.2 Kraft capacitor paper, high reliability 2.3 Kraft capacitor paper, low loss 2.4 Kraft capacitor paper, high reliability, low loss 3. Crpe paper 3.1 Hard, comparatively
40、 non-absorbent crped kraft insulating paper 3.2 Soft porous crped kraft insulating paper 4. Electrolytic capacitor paper 4.1 Absorbent separator paper, long fibres 4.2 Absorbent separator paper, short fibres 4.3 Non-absorbent paper 5. Special papers NOTEThe parameters defined inTable I are basic pro
41、perties required for paper-making purposes. Electrical properties relative to these parameters are further defined in Part3 of IEC Publication554 (under consideration). a Example 1.2-2M = apparent density greater than0.75 and not exceeding0.85g/cm 3 , conductivity over4mS/m and air permeability “med
42、ium” between0.05 and0.5 4m/Pa.s. 4 blankBS5626-1:1979 BSI 01-2000 Publications referred to See national foreword.BS 5626-1: 1979 IEC 554-1: 1977 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It
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