EN 61482-1-2-2014 en Live working - Protective clothing against the thermal hazards of an electric arc - Part 1-2 Test methods - Method 2 Determination of arc protection class of m.pdf

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1、BSI Standards PublicationLive working Protective clothing against the thermal hazards of an electric arcPart 1-2: Test methods Method 2: Determination of arc protection class of material and clothing by using a constrained and directed arc (box test)BS EN 61482-1-2:2014National forewordThis British

2、Standard is the UK implementation of EN 61482-1-2:2014. It isidentical to IEC 61482-1-2:2014. It supersedes BS EN 61482-1-2:2007, whichwill be withdrawn on 13 November 2017.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/78, Tools for live working.A list of organizati

3、ons represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015Published by BSI Standards Limited 2015.ISBN 9

4、78 0 580 79850 4ICS 13.220.40; 29.260; 29.260.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2015. Amendments/corrigenda issued since publicationDate

5、 Text affectedBRITISH STANDARDBS EN 61482-1-2:2014EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 61482-1-2 December 2014 ICS 13.220.40; 29.260; 29.260.99 Supersedes EN 61482-1-2:2007 English Version Live working - Protective clothing against the thermal hazards of an electric arc - Part 1-2: Test

6、 methods - Method 2: Determination of arc protection class of material and clothing by using a constrained and directed arc (box test) (IEC 61482-1-2:2014) Travaux sous tension - Vtements de protection contre lesdangers thermiques dun arc lectrique - Partie 1-2: Mthodesdessai - Mthode 2: Dterminatio

7、n de la classe de protectioncontre larc de matriaux et de vtements au moyen dun arcdirig et contraint (enceinte dessai) (CEI 61482-1-2:2014) Arbeiten unter Spannung - Schutzkleidung gegen diethermischen Gefahren eines elektrischen Lichtbogens - Teil 1-2: Prfverfahren - Verfahren 2: Bestimmung derLic

8、htbogen-Schutzklasse des Materials und der Kleidung unter Verwendung eines gerichteten Prflichtbogens (Box-Test) (IEC 61482-1-2:2014) This European Standard was approved by CENELEC on 2014-11-13. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit

9、ions 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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exis

10、ts 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 CEN-CENELEC Management Centre has the same status as the official versions.CENELEC members are the natio

11、nal electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Port

12、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-100

13、0 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61482-1-2:2014 E EN 61482-1-2:2014 - 2 - Foreword The text of document 78/1053/FDIS, future edition 2 of IEC 61482-1-2, prepared by IEC/TC 78 “Live working“ was submitt

14、ed to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61482-1-2:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-08-13 latest date by which the nati

15、onal standards conflicting with the document have to be withdrawn (dow) 2017-11-13 This document supersedes EN 61482-1-2:2007. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for id

16、entifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61482-1-2:2014 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated:

17、IEC 61482-1-1 NOTE Harmonized as EN 61482-1-1. ISO 3175-2 NOTE Harmonized as EN ISO 3175-2. ISO 6330 NOTE Harmonized as EN ISO 6330. ISO 13688:2013 NOTE Harmonized as EN ISO 13688:2013 (not modified). ISO 15797 NOTE Harmonized as EN ISO 15797. BS EN 61482-1-2:2014- 3 - EN 61482-1-2:2014 Annex ZA (no

18、rmative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For un

19、dated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European

20、 Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year ISO 9151 1995 Protective clothing against heat and flame - Determination of heat transmission on exposure to flame - - BS EN 61482-1-2:2014 2 IEC 61482-1-2:2014 IEC 2014 CONTENTS 1 Scope 6 2 Normativ

21、e references 6 3 Terms, definitions and symbols 6 3.1 Terms and definitions 6 3.2 Symbols and units used in this document 11 4 Principle of the test method . 11 4.1 Material box test procedure . 11 4.2 Garment box test procedure 11 5 Significance and use of the test method 12 6 Test apparatus 12 6.1

22、 Test apparatus and test box 12 6.2 Material box test procedure . 15 6.2.1 Arrangement of the material box test procedure . 15 6.2.2 Test plate (panel) construction . 16 6.2.3 Sensor construction . 17 6.2.4 Sensor response . 17 6.3 Garment box test procedure 17 6.3.1 Arrangement of the garment box t

23、est procedure 17 6.3.2 Mannequin construction . 17 6.4 Electric supply and electrodes 18 6.4.1 Test circuit . 18 6.4.2 Test circuit control . 18 6.4.3 Electrodes . 18 6.4.4 Fuse wire . 18 6.5 Electric test arc characteristics . 19 6.6 Measurement and data acquisition system 19 7 Operator safety 19 8

24、 Specimen preparation 20 8.1 Description of the test specimens . 20 8.1.1 Test specimens for material box test procedure . 20 8.1.2 Test specimens for garment box test procedure . 20 8.2 Pre-treatment by cleaning . 20 8.3 Pre-conditioning of the test specimens 20 9 Calibration . 20 9.1 Data acquisit

25、ion system pre-calibration . 20 9.2 Calorimeter calibration check 20 9.3 Arc exposure calibration . 21 9.4 Calibration of the electric test circuit and testing . 21 9.5 Confirmation of test apparatus setting . 22 9.6 Preparing and conditioning of the box . 22 10 Apparatus care and maintenance 22 10.

26、1 Surface reconditioning of the sensors . 22 10.2 Care of test plate and mannequin . 23 10.3 Care of electrodes 23 BS EN 61482-1-2:2014IEC 61482-1-2:2014 IEC 2014 3 11 Test procedures 23 11.1 Test parameters 23 11.2 Number of tests 23 11.3 Test conditions and initial temperature 24 11.4 Specimen mou

27、nting 24 11.4.1 Material box test procedure . 24 11.4.2 Garment box test procedure 24 11.5 Specimen description 24 12 Interpretation of results 25 12.1 Heat transfer . 25 12.1.1 Determining time zero 25 12.1.2 Plotting sensor response . 25 12.1.3 Incident energy Ei25 12.1.4 Sensor response versus St

28、oll curve . 25 12.2 Visual inspection . 25 12.3 Test result. 26 12.3.1 Acceptance criteria of material box test procedure . 26 12.3.2 Acceptance criteria of garment box test procedure 26 13 Test report . 27 Annex A (informative) Precision of the test method 28 Bibliography 29 Figure 1 Test box . 14

29、Figure 2 Test set-up . 15 Figure 3 Test plate with sensors (calorimeters in mounting boards) 16 Table 1 Test validity check range of direct exposure incident energy (permissible direct exposure incident energy range) . 21 Table 2 Test validity check range of arc energy (permissible arc energy range)

30、 22 Table 3 Test parameters for Classes 1 and 2 . 23 Table 4 Acceptance criteria for tests on materials 26 Table 5 Acceptance criteria for tests on garments 26 Table A.1 Repeatability and reproducibility values of test procedure 28 BS EN 61482-1-2:2014 6 IEC 61482-1-2:2014 IEC 2014 LIVE WORKING PROT

31、ECTIVE CLOTHING AGAINST THE THERMAL HAZARDS OF AN ELECTRIC ARC Part 1-2: Test methods Method 2: Determination of arc protection class of material and clothing by using a constrained and directed arc (box test) 1 Scope This part of IEC 61482 specifies procedures to test material and garments intended

32、 for use in heat and flame-resistant clothing for workers if there is an electric arc hazard. A directed and constrained electric arc in a test circuit is used to classify material and clothing in two defined arc protection classes. This International Standard is not dedicated toward measuring the a

33、rc rating values (ATPV1, ELIM2or EBT3). Procedures determining these arc rating values are prescribed in IEC 61482-1-1, using an open arc for testing. Other effects than the thermal effects of an electric arc like noise, light emissions, pressure rise, hot oil, electric shock, the consequences of ph

34、ysical and mental shock or toxic influences are not covered by this standard. Protective clothing for work intentionally using an electric arc, e.g. arc welding, plasma torch, is not covered by this standard. 2 Normative references The following documents, in whole or in part, are normatively refere

35、nced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9151:1995, Protective clothing against heat and flame Determination of

36、heat transmission on exposure to flame 3 Terms, definitions and symbols For the purposes of this document, the following terms, definitions and symbols apply. 3.1 Terms and definitions 3.1.1 arc current Iarc current actually flowing in the electric test circuit during arc duration (through the arc)

37、_ 1ATPV = arc thermal performance value. 2ELIM= incident energy limit 3EBT= breakopen energy threshold BS EN 61482-1-2:2014IEC 61482-1-2:2014 IEC 2014 7 Note 1 to entry: Arc current is expressed in kA rms. Note 2 to entry: The arc current flowing during arc duration fluctuates due to the non-linear

38、arc impedance stochastically varying with time. 3.1.2 arc duration time duration of the arc Note 1 to entry: Arc duration is expressed in ms. 3.1.3 arc energy Warc electrical energy supplied to the arc and converted in the arc Note 1 to entry: Arc energy is the sum of the instantaneous arc voltage v

39、alues multiplied by the instantaneous arc current values multiplied by the incremental time values during the arc duration. Note 2 to entry: Arc energy is expressed in kJ or kWs. 3.1.4 arc gap distance between the arc electrodes Note 1 to entry: Arc gap is expressed in mm. 3.1.5 arc protection class

40、 category of arc thermal protection of material and protective clothing tested in the box test (class 1 or class 2) Note 1 to entry: The arc protection class is characterized by the test energy level of arc exposure (arc energy and incident energy). Note 2 to entry: Tested material and protective cl

41、othing show arc thermal protection at minimum up to the class energy level. In general the actual exposure energy limit up to which the material and protective clothing provide protection is higher. 3.1.6 arc thermal protection degree of thermal protection offered against electric arc under specific

42、 arc testing conditions Note 1 to entry: For materials, the arc thermal performance is obtained from the measurement of the transmitted energy and by evaluation of other thermal parameters (burning time, hole formation, melting). Note 2 to entry: For garments, the arc thermal performance is obtained

43、 by evaluation of thermal parameters (burning time, hole formation, melting) and of the functioning of fasteners and accessories. 3.1.7 arc voltage voltage across the arc Note 1 to entry: Arc voltage is expressed in V. 3.1.8 burning time after flame time time for which a flaming of the test specimen

44、 is visible after the end of the electric arc duration Note 1 to entry: Burning time is expressed in s. BS EN 61482-1-2:2014 8 IEC 61482-1-2:2014 IEC 2014 3.1.9 calorimeter assembly of a copper disc with attached thermocouple used for measuring the heat flux and incident energy 3.1.10 charring forma

45、tion of carbonaceous residue as the result of pyrolysis or incomplete combustion 3.1.11 clothing assembly of garments worn by workers 3.1.12 delta peak temperature Tp difference between the maximum temperature and the initial temperature of the sensor during the test exposure time Note 1 to entry: D

46、elta peak temperature is expressed in C. Note 2 to entry: The symbol Tpis used without index when testing with material; an additional index “0” is used when testing without material for calibration (Tp0). 3.1.13 direct exposure incident energy Ei0heat energy or incident energy emitted by the electr

47、ic arc and received at a calorimeter directly exposed to the arc without material influence Note 1 to entry: Direct exposure incident energy is used for calibration. Note 2 to entry: Direct exposure incident energy is expressed in kJ/m2or kWs/m2(cal/cm2)4. 3.1.14 dripping material response evidenced

48、 by flowing of the fibre polymer 3.1.15 electric arc self-maintained gas conduction for which most of the charge carriers are electrons supplied by primary-electron emission Note 1 to entry: During live working, the electric arc is generated by gas ionisation arising from an unintentional electrical

49、 conducting connection or breakdown between live parts or a live part and the earth path of an electrical installation or an electrical device. During testing, the electric arc is initiated by the blowing of a fuse wire. SOURCE: IEC 60050-121:1998, 121-13-12, modified the Note 1 to entry has been added to refer specifically to live working and arc testing. 3.1.16 embrittlement formation of a brittle residue as the result of pyrolysis or incomplete combustion 3.1.17 exposure