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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 50237:2000 The Euro
2、pean Standard EN 50237:1997 has the status of a British Standard ICS 13.260; 13.340.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Gloves and mitts with mechanical protection for electrical purposes Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:14 GMT+00:00
3、2006, Uncontrolled Copy, (c) BSI BS EN 50237:2000 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 July 2000 BSI 07-2000 ISBN 0 580 28764 5 Amendments iss
4、ued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 50237:1997 published by the European Committee for Electrotechnical Standardization (CENELEC). The UK participation in its preparation was entrusted to Technical Committee PE
5、L/78, Tools for live working, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments
6、 and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. The following errors in the ratified text of EN 50237 have been corrected: In clause 7.3.6, “EN 60903,“ has been inserted before “Figure 15“; In the title of Figure 5, “
7、see 6.5.1“ has been changed to “see 6.9.1“; In the title of Figure 7, “see 7.3.3“ has been changed to “see 7.3.5“; In the title of Figure 10, “see 7.3.5“ has been changed to “see 7.3.3“; In the title of Figure 12, “see 7.6.1“ has been changed to “see 7.5.3“; In the title of Figure 14, “see 7.6.2 and
8、 8.6“ has been changed to “see 7.5.2 and 7.6.6 In E.4, “must“ has been changed to “shall“. These errors were also noted in the German version, DIN EN 50237, September 1998, but the French language publication NF EN 50237:1997 does not include these corrections. Cross-references The British Standards
9、 which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does n
10、ot 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. Summary of pages This document comprises a front cover, an inside
11、front cover, the EN title page, pages 2 to 33 and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CENELEC European Committee for Electrotechnical Standardization Comite Europe en de Normalisation Electrotechnique Europa isches
12、Komitee fu r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50237:1997 E EUROPEAN STANDARDEN 50237 NORME EUROPE ENNE EUROPA ISCHE NORM May 1997
13、 ICS 13.340.10 Descriptors: hot-line works, protective clothing, insulation gloves, plastics, rubber, classifications, definitions, composition, property, dimensions, dimensional measurements, shapes, mechanical properties, mechanical strength, electrical properties, thermal properties, test, markin
14、g, utilisation, packing English version Gloves and mitts with mechanical protection for electrical purposes Gants et moufles avec protection me canique pour travaux e lectriques Handschuhe fu r mechanische Beanspruchung fu r Arbeiten unter Spannung This European Standard was approved by CENELEC on 1
15、997-03-11. CENELEC members are bound to comply with the CEN/CENELEC 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 b
16、e obtained on application to the Central Secretariat or to any CENELEC 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 th
17、e Central Secretariat has the same status as the official versions. 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 K
18、ingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 50237:1997 BSI 07-2000 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 78, Tools and equipment for live working. The text of the draft was s
19、ubmitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50237 on 1997-03-11. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-12-01 latest date by whi
20、ch national standards conflicting with the EN have to be withdrawn(dow) 1997-12-01 Mechanical requirements derived from those of protective gloves against mechanical risks are given in EN 388:1994. This European Standard has been prepared under a mandate given to CENELEC by the European Commission a
21、nd the European Free Trade Association and supports essential requirements of EC Directive 89/686/EEC. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions3 4Composition4 5Classification4 6Physical requirements5 7Tests on gloves6 8User instructions13 9Quality assurance p
22、lan and acceptance test13 Annex A (normative) General test procedure27 Annex B (normative) Oil for tests on gloves of category H Oil resistance28 Annex C (normative) Sampling procedure28 Annex D (normative) Electrical limits for the use of gloves and mitts with mechanical protection for electrical p
23、urposes29 Annex E (normative) User instructions30 Annex F (informative) Typical glove dimensions31 Annex G (informative) Cotton canvas additional characteristics and additional information on cutting resistance test equipment32 Annex H (informative) Acceptance tests33 Licensed Copy: sheffieldun shef
24、fieldun, na, Mon Nov 06 02:16:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 50237:1997 BSI 07-2000 Introduction This draft standard was established on the basis of EN 60903 on insulating gloves. The same quality level of insulation was required as basic principle. The purpose thereof was t
25、o combine in one unique glove the insulating properties of elastomer gloves and the mechanical properties of leather gloves which are commonly used to protect mechanically the insulating gloves. For the time being, only three classes of gloves are covered due to the lack of data and practice for hig
26、h voltages. Some difficulties were observed when combining electrical and mechanical properties. It seems to be difficult to obtain flexible gloves providing adequate mechanical protection. 1 Scope This standard is applicable to insulating gloves and mitts made of plastic or elastomer for use withou
27、t over-gloves for mechanical protection. Unless otherwise stated the use of the term glove includes both gloves and mitts. The gloves are intended to be used for working live or close to live parts at nominal voltages up to 7 500 V a.c. (or 11 250 V d.c.) For other voltages detailed information is n
28、ot yet available. 1.1 Classes of gloves Three classes of gloves, differing in electrical characteristics, are provided and are designated class 00, class 0, class 1. For other classes such as class 2, class 3 and class 4 additional data will be necessary. 1.2 Categories of gloves Five categories of
29、gloves, differing in properties related to acid, oil, ozone and a combination of all are provided and designated, Categories A, H, Z and P respectively, and also extreme low temperature, designated Category C. 2 Normative references This European Standard incorporates by dated or undated reference,
30、provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in
31、 it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 388:1994, Protective gloves against mechanical risks. EN 60903:1992, Specification for gloves and mitts of insulating material for live working (IEC 903:1988, mod
32、ified). ENV 50196:1995, Live working Required insulation level and related air distances Calculation method. IEC 50(121):1978, International Electrotechnical Vocabulary (IEV) Chapter 121: Electromagnetism. IEC 50(151):1978, International Electrotechnical Vocabulary (IEV) Chapter 151: Electrical and
33、magnetic devices. IEC 50(601):1985, International Electrotechnical Vocabulary (IEV) Chapter 601: Generation, transmission and distribution of electricity General. IEC 60-1:1989, High voltage test techniques Part 1: General definitions and test requirements (harmonized as HD 588.1 S1:1991). IEC 160:1
34、963, Standard atmospheric conditions for test purposes. IEC 212:1971, Standard conditions for use prior to and during the testing of solid electrical insulating materials (harmonized as HD 437 S1:1984). IEC 410:1973, Sampling plans and procedures for inspection by attributes. IEC 1318:1994, Live wor
35、king Guidelines for quality assurance plans. ISO 472:1988, Plastics Vocabulary. ISO 9000:1987, Quality management and quality assurance standards Guidelines for selection and use. 3 Definitions For the purposes of this standard, the following definitions apply 3.1 palm part of glove covering the fac
36、e of the central inside hand 3.2 wrist the narrowest part of the glove above the cuff 3.3 contour glove a glove shaped at the upper part of the cuff in such a way as to facilitate the bending of the arm 3.4 fork part of glove at the junction of two fingers, or finger and thumb 3.5 curved glove a glo
37、ve on which the fingers are slightly bent in a position corresponding to the position the hand forms while holding an object Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 50237:1997 BSI 07-2000 3.6 lined glove a glove with an ins
38、ide lining of textile attached to the plastic or to the elastomer 3.7 composite glove a glove composed of several attached or superimposed layers of different colours 3.8 mitt a glove which has less than four fingers individually enclosed 3.9 cuff part of a glove from the wrist to the open part of t
39、he glove 3.10 cuff roll the roll or reinforced edge of a glove at the cuff 3.11 electrical puncture a disruptive breakdown through a solid insulant IEV 121-03-13 3.12 flashover an arc by-passing an insulating body IEV 121-03-14 and occurring between electrodes and over or around, but not through, th
40、e equipment being tested 3.13 nominal voltage a suitable approximate value of voltage used to identify a system IEV 601-01-21 3.14 plastic a material which contains as an essential ingredient a high polymer and which at some stage in its processing into finished products can be shaped by flow ISO 47
41、2-1.2.22 3.15 elastomer a generic term that includes rubbers, latex and elastomeric compounds that may be natural or synthetic or a mixture or a combination of both 3.16 proof voltage the specified voltage that is applied to a device for the time defined under specified conditions to assure that the
42、 electrical strength of the insulation is above a specified value 3.17 withstand voltage the voltage that the device must withstand without flashover, disruptive discharge, puncture or other electric failure when voltage is applied under specified conditions 3.18 type test a test performed on one or
43、 more devices made to a certain design to show that the design meets certain specifications IEV 151-04-15 3.19 routine test a test to which each device is subjected during or after manufacture to ascertain whether it complies with certain criteria IEV 151-04-16 3.20 sampling test a test performed on
44、 a number of devices taken at random from a batch IEV 151-04-17 3.21 acceptance test a contractual test to prove to the customer that the device meets certain conditions of its specification IEV 151-04-20 4 Composition The gloves shall be manufactured of plastic or elastomer. They may be lined or un
45、lined, uncovered or have an exterior covering for protection against mechanical wear, chemical attack, and the effects of ozone. In case of wear on the exterior of a composite glove made up of layers of different colours, the different colour layer underneath will appear. The gloves shall be provide
46、d with a cuff. 5 Classification The gloves covered under this standard shall be designated as follows: by class as class 00, class 0, class 1; by special properties by the addition of a suffix as shown in Table 1. Guidance as to use in relation to nominal voltage of a system is given in annex D. Gui
47、dance as to temperature range at which gloves can be used is given in annex E. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 50237:1997 BSI 07-2000 Table 1 Special properties CategoryResistant to AAcid HOil ZOzone PAcid, oil, ozo
48、ne CExtreme low temperature NOTE 1 Category P combines the characteristics of categories A, H and Z. NOTE 2 Any combination of categories may be used. 6 Physical requirements 6.1 Shape 6.1.1 The shape of a glove is indicated in Figure 1. The letter h in Figure 1 represents the curve of the finger in
49、 curved gloves. The shape of a mitt is indicated in Figure 2. 6.1.2 Gloves may be manufactured with or without cuff roll. 6.2 Dimensions 6.2.1 Length Class 00 standard lengths are 270 mm and 360 mm; Class 0 standard lengths are 270 mm, 360 mm, 410 mm and 460 mm; Class 1 standard lengths are 360 mm, 410 mm and 460 mm. The permissible variation in length shall be 15 mm for any class. NOTEIf other classes are required, length should be those of EN 60903. 6.2.2 For contour cuff gloves the difference between
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