BS EN 61197-1996 Insulating liquids - Linear flame propagation - Test method using a glass-fibre tape《绝缘油 火焰线性传播 玻璃纤维试验法》.pdf

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1、BRITISH STANDARD BS EN 61197:1996 IEC1197:1993 Insulating liquids Linear flame propagation Test method using a glass-fibre tape The European Standard EN61197:1994 has the status of a BritishStandardBSEN61197:1996 This BritishStandard, having been prepared under the directionof the Electrotechnical S

2、ector Board, was published underthe authority of the Standards Board and comes intoeffect on 15February1996 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference GEL/10 Draft for comment92/03948 DC ISBN 0 580 25221 3 Committees responsible for this BritishS

3、tandard The preparation of this BritishStandard was entrusted to Technical Committee GEL/10, Fluids for electrotechnical applications, upon which the following bodies were represented: British Cable Makers Confederation British Lubricants Federation Limited Chemical Industries Association Electricit

4、y Association Health and Safety Executive Institute of Petroleum Institution of Electrical Engineers London Regional Transport National Association of Waste Disposal Contractors Transmission and Distribution Association (BEAMA Limited) Amendments issued since publication Amd. No. Date CommentsBSEN61

5、197:1996 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN61197 3 List of references Inside back coverBSEN61197:1996 ii BSI 12-1999 National foreword This BritishStandard has been prepared by Technical Committee GEL/10, and is the Englis

6、h language version of EN61197 Insulating liquids Linear flame propagation Test method using a glass-fibre tape, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1197:1993 published by the International Electrotechnical Commission (IEC). A Br

7、itish 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-reference Publication referred to Corre

8、sponding BritishStandard EN6069-2-4/0:1993 BS EN60695 Fire hazard testing (IEC695-2-4/0:1990) BS EN60695-2 Test methods BS EN60695-2-4/0:1993 Diffusion type and premixed type flame test methods Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title

9、 page, pages2 to10, 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61197 November1994 ICS

10、29.040.20 Descriptors: Liquid electrical insulating materials, tests, measurements, flame propagation, tapes, glass-fibres, characteristics English version Insulating liquids Linear flame propagation Test method using a glass-fibre tape (IEC1197:1993) Isolants liquides Propagation linaire de la flam

11、me Mthode dessai utilisant un ruban en fibres de verre (CEI1197:1993) Isolierflssigkeiten Lineare Flammenausbreitung Prfverfahren unter Verwendung eines Glasfaserbandes (IEC1197:1993) This European Standard was approved by CENELEC on 1994-07-05. CENELEC members are bound to comply with the CEN/CENEL

12、EC 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 any CE

13、NELEC 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 version

14、s. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardi

15、zation Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN61197:1994 EEN61197:1994 BSI 12-1999 2 Foreword The text of document10(CO)268, as pre

16、pared by IEC Technical Committee10: Fluids for electrotechnical applications, was submitted to the IEC-CENELEC parallel vote in October1992. The reference document was approved by CENELEC as EN61197 on5 July1994. The following dates were fixed: Annexes designated “normative” are part of the body of

17、the standard. In this standard, Annex ZA is normative. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Summary of method 3 4 Test liquid 3 5 Apparatus 3 6 Procedure 5 7 Report 6 Annex ZA (normative) Other international publications quoted in this standard with the refere

18、nces of the relevant European publications 9 Figure 1 Arrangement of test apparatus for linear flame propagation test 6 Figure 2 Device for controlling the quantity of liquid 7 Figure 3 Ignition 8 Table 1 Characteristics of tape 4 latest date of publication of an identical national standard (dop)199

19、5-07-01 latest date of withdrawal of conflicting national standards (dow)1995-07-01EN61197:1994 BSI 12-1999 3 Introduction IEC technical committee89 has been issuing guidelines for the evaluation of the fire hazard associated with electrical equipment and solid electrical insulation. In IEC695-1-1 i

20、t is stated that the following properties are relevant to the full assessment of fire hazard. ignitability; combustion; propagation; opacity, toxicity and corrosiveness of smoke and gaseous products of combustion. IEC technical committee10 has planned to develop standard method of test covering each

21、 of the above properties for electrical insulating liquid. This publication contains a standard method for the measurement of linear flame propagation. 1 Scope This standard describes a method for measurement of linear flame propagation along a glass-fibre tape impregnated with the insulating liquid

22、 to be tested. This test method is applicable to all insulating liquids, used and unused, with kinematic viscosity lower than or equal to300mm 2 /s at40 C. Insulating liquids of higher viscosity may also be tested but should be heated before impregnation of the glass-fibre tape (see6.2.3, note1). 2

23、Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. Allnormative documents are subject to revision, and parties to agreeme

24、nts based on this InternationalStandard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC695-2-4/0:1991, Fire hazard testing Part2: T

25、est methods Section4/sheet0: Diffusion type and premixed type flame test methods. IEC695-2-4/2, Fire hazard testing Part2: Test methods Section4/sheet2:500W nominal premixed test flame and guidance (under consideration). 3 Summary of method A glass-fibre tape impregnated with the insulating liquid i

26、s held in a horizontal position and ignited at one end of the impregnated length under draught-free conditions. The time for the flame to travel between two lines marked on the tape is measured. The burning rate is calculated by dividing the distance between the two lines by the burning time. 4 Test

27、 liquid The test liquid shall be kept in a clean vessel between the time of sampling and testing. 5 Apparatus 5.1 Test equipments The equipments consist of the following: Twilled glass-fibre tape as specified in Table 1.EN61197:1994 4 BSI 12-1999 Table 1 Characteristics of tape The twilling ratio is

28、2.2. The twill weave is described as follows: Butane gas. One of the two igniters described in sheet2 (under consideration) of IEC695-2-4. Tape support rods made of metal, approximately8mm in diameter and longer than50mm. Stands suitable for holding the tape support rods and tape. A mass of200g 1g.

29、A stopwatch measuring to the nearest0,2s. NOTEA suitable tape of this type is “AYA2530”, manufactured by ARISAWA Mfg. Co. Ltd,4-18 Yanagibashi2-Chome, Taito-ku, Tokyo Japan. This material has the advantage that the size has already been removed by heat treatment. This tape can be ordered from the Ja

30、panese National Committee, c/o The Institute of Electrical Engineers of Japan 1-12-1 Shin-Yuraku-Cho Building Yuraku-Cho, Chioyoda-ku Tokyo100, Japan. 5.2 Device for controlling the quantity of liquid on tape The device to be used is shown in Figure 2. The mass of the dead weight (top metal bar and

31、metal block) shall be1,0kg 0,001kg. The two metal bars shall be10mm in diameter and230mm in length. 5.3 Test enclosure A draught-free enclosure which permits safe ventilation of the combustion products. The temperature of the air in the enclosure at the start of each test shall be23 C 5 C. Class of

32、yarn (TEX) a Yarn density b Thickness (mean) Width Tensile strength N/width Weight loss by heating at600 C Mass per metre Warp Weft Warp yarn/width Weft yarn/25mm mm mm N/cm % g/m 101,2 67,5 48 1 46 2 0,260 0,030 25 1 392 minimum 0,5 maximum 6,9 minimum a TEX: number of grams per1000m of collected f

33、ibre. b Yarn density: number of yarns in the indicated width.EN61197:1994 BSI 12-1999 5 6 Procedure Warning Attention must be paid to the fact that some liquids, especially the used ones, may contain some contamination products able to, release, when heated toxic and harmful gases. Appropriate warni

34、ng should be given to operators, and precautions taken in order to avoid any health problems. In particular, all the conditions related to the test enclosure shall be strictly followed. 6.1 Adjustment of testing apparatus Set up the tape support rods and stands in the test enclosure as shown in Figu

35、re 1. The two tape support rods should be carefully adjusted with the aid of a spirit level to ensure that when the tape is placed between them it is in a perfectly horizontal position. NOTEIf the tape deviates from the horizontal position, correct test results will not be obtained. 6.2 Preparation

36、of test piece 6.2.1 Cut the tape to900mm1000mm in length. 6.2.2 Mark accurately two lines on the tape with ink as shown in Figure 1. The distance between the two lines shall be300mm 3mm. 6.2.3 The tape shall be impregnated with the test liquid and set to the test apparatus, according to the followin

37、g procedure: Soak the tape in the test liquid and ensure complete impregnation of the tape. The portion between the right-hand tape support rod and the weight shall not be soaked. Complete impregnation is confirmed by visual observation of no successive release of bubbles. Remove the tape from the l

38、iquid. Place the tape between the two bars of the device as shown in Figure 2 and then pull it through by the end to which the weight will be attached. Pull the tape at a speed of30cm/min 5cm/min. In so far as the influence of this speed on the quantity of liquid retained in the tape is not signific

39、ant, this procedure can be satisfied by hand operation. NOTE 1When a liquid of viscosity higher than300mm 2 /s but less than5000mm 2 /s at40 C is tested, the liquid should be heated at80 C 10 C; to enhance impregnation. When the tape is impregnated with the hot liquid, it should be cooled to the tes

40、t temperature before being ignited. NOTE 2Interlaboratory tests have proved that the quantity of liquid impregnating the tape is not critical. 6.3 Test procedure The test should be carried out in the draught-free enclosure. 6.3.1 Light and adjust the igniter so as to produce a flame according to the

41、 requirements of IEC695-2-4. 6.3.2 Apply the tip of the flame to the lower surface of the tape at a location50mm to the right of the right-hand marked line. When the liquid starts burning, remove the igniting flame and then ensure a draught-free environment by closing all ports to prevent air flow.

42、6.3.3 Measure the time for the leading edge of the flame to travel between the marked lines using a stopwatch. 6.3.4 At the end of each test ensure safe ventilation of combustion products. 6.4 Number of test specimens Repeat the measurements described in6.2 to6.3 three times for each test liquid. If

43、 the liquid does not ignite or if the flame fails to reach the left-hand marked line during the test, repeat the measurements up to five times in an attempt to obtain three sets of data. When three measurements are obtained without extinction of the flame, the three measured values are used for calc

44、ulating the burning rate. When the flame records three failures, the test results are expressed as “extinction”. 6.5 Calculation of burning rate Calculate the burning rate using the following equation: Burning rate (mm/s) Distance between two marked lines (mm) Burning times (s) - =EN61197:1994 6 BSI

45、 12-1999 7 Report The following shall be reported. Number of this standard. Identification of liquid tested including: type viscosity density source manufacturers code number previous history conditioning (if any) Report all valuesor “extinction” Report the burning rate(mm/s) calculated as the mean

46、of the three determinations. Figure 1 Arrangement of test apparatus for linear flame propagation testEN61197:1994 BSI 12-1999 7 Figure 2 Device for controlling the quantity of liquidEN61197:1994 8 BSI 12-1999 Figure 3 IgnitionEN61197:1994 BSI 12-1999 9 Annex ZA (normative) Other international public

47、ations quoted in this standard with the references of the relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed h

48、ereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. NOTEWhen the international publi

49、cation has been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies. IEC Publication Date Title EN/HD Date 695-2-4/0 1991 Fire hazard testing Part2: Test methods Section4/sheet0: Diffusion type and premixed type flame test methods EN60695-2-4/0 1993 695-2-4/2 1994 Section4/sh