BS EN 50365-2002 Electrically insulating helmets for use on low voltage installations《在低压设备中使用的电绝缘头盔》.pdf

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1、BRITISH STANDARD BS EN 50365:2002 Electrically insulating helmets for use on low voltage installations The European Standard EN 50365:2002 has the status of a British Standard ICS 13.340.20; 13.260 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 50365:2002 This British St

2、andard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 3 July 2002 BSI 3 July 2002 ISBN 0 580 40016 6 National foreword This British Standard is the official En

3、glish language version of EN 50365:2002. The UK participation in its preparation was entrusted to Technical Committee PEL/78, Tools for live working, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references T

4、he British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standa

5、rds Online. This publication does not purport to include all the necessary provisions of a contract. Users of this publication are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the

6、text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front

7、cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50365 NORME EUROPENNE EUROPISCHE NORM May 200

8、2 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserve

9、d worldwide for CENELEC members. Ref. No. EN 50365:2002 E ICS 13.340.20; 13.260 English version Electrically insulating helmets for use on low voltage installations Casques lectriquement isolants pour utilisation sur installations basse tension Elektrisch isolierende Helme fr Arbeiten an Niederspann

10、ungsanlagen This European Standard was approved by CENELEC on 2001-07-01. 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 bibl

11、iographical references concerning such national standards may be 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 responsibili

12、ty of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux

13、embourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 50365:2002 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 78, Equipment and tools for live working. The text of the draft was submitted to the Unique Acceptance P

14、rocedure and was approved by CENELEC as EN 50365 on 2001-07-01. 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) 2002-11-01 - latest date by which the national standards conf

15、licting with the EN have to be withdrawn (dow) 2004-08-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annexes A, B, C and ZA are normative and annex D is informative. This European Standard ha

16、s been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 89/686/EEC. _- 3 - EN 50365:2002 Contents 1 Scope .4 2 Normative references.4 3 Definitions.5 4 Classification.5 5 Requirements 5 5

17、.1 General 5 5.2 Non-electrical requirements5 5.3 Electrical requirements 5 5.4 Marking 6 5.5 Packaging.6 5.6 Instructions for use6 6 Tests.6 6.1 General 6 6.2 Non-electrical tests6 6.3 Electrical tests 7 6.4 Marking 8 6.5 Packaging.8 7 Quality assurance plan and acceptance tests .8 7.1 General 8 7.

18、2 Sampling procedure.8 7.3 Acceptance tests .8 Annex A (normative) General test procedure11 Annex B (normative) Instructions for use .12 Annex C (normative) Sampling procedure13 Annex D (informative) Acceptance tests 15 Figures Figure 1 - Arrangement for electrical tests.9 Figure 2 - Marking10 Table

19、s Table 1 - Proof test voltage, proof test current and withstand test voltage8 Table A.1 - Sequence of tests.11 Table C.1 - Classification of defects13 Table C.2 - Major defects .13 Table C.3 - Minor defects .14EN 50365:2002 - 4 - 1 Scope This standard is applicable to electrically insulating helmet

20、s used for working live or close to live parts on installations not exceeding 1 000 V a.c. or 1 500 V d.c. These helmets, when used in conjunction with other electrically insulating protective equipment prevent dangerous current from passing through persons via their head. 2 Normative references Thi

21、s 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 hereafter. For dated references, subsequent amendments to or revisions of any of these public

22、ations 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 (including amendments). EN 397:1995 Industrial safety helmets + A1:2000 EN 443:1997 Helmets for fire fighters EN 960:1994 Hea

23、dforms for use in the testing of protective helmets + A1:1998 EN 60060-2:1994 High-voltage test techniques - Part 2: Measuring systems + A11:1998 (IEC 60062-2:1994) EN 60529:1991 Degrees of protection provided by enclosures (IP Code) + A1:2000 EN/ISO 9000 (Series) Quality management and quality assu

24、rance standards HD 437 S1:1984 Standard conditions for use prior to and during the testing of solid electrical insulating materials (IEC 60212:1971) HD 588.1 S1:1991 High-voltage test techniques - Part 1: General definitions and test requirements (IEC 60060-1:1989 + corrigendum March 1990) IEC 60050

25、-151:2001 International Electrotechnical Vocabulary - Part 151: Electrical and magnetic devices IEC 61318:1994 Live working - Guidelines for quality assurance plans ISO 2859-1:1999 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) f

26、or lot-by-lot inspection ISO 2859-2:1985 Sampling procedures for inspection by attributes - Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection ISO/DIS 6344-1:1998 Coated abrasives Grain size analysis - Part 1: Grain size distribution test- 5 - EN 50365:2002 3 Definit

27、ions 3.1 electrically insulating helmet a safety helmet which protects the wearer against electrical shocks by preventing the passage of dangerous current through the body via the head 3.2 type test a test performed on one or more devices made to a certain design to show that the design meets certai

28、n specifications IEV 151-04-15 3.3 sampling test a test performed on a number of devices taken at a random from a batch IEV 151-04-17 3.4 acceptance test a contractual test to prove the customer that the device meets certain conditions of its specification IEV 151-04-20 3.5 proof test voltage a spec

29、ified value of voltage that is applied to a device, item or component for the time defined under specified conditions to assure that the electrical strength of the insulation is above a specified value 3.6 withstand test voltage a specified value of voltage that a device, item or component must with

30、stand without flashover, disruptive discharge, puncture or other electric failure when that value of voltage is applied under specified conditions 4 Classification Helmets used on or near electrical installations shall be classified in - electrical class 0 for installations with nominal voltage up t

31、o 1 000 V a.c. and 1 500 V d.c. 5 Requirements 5.1 General Insulating helmets shall fulfil the requirements of EN 397 or EN 443. 5.2 Non-electrical requirements Insulating helmets shall not consist of conductive parts (see 6.2.1). The design of air-conditioning holes if any shall prevent accidental

32、contact with live parts and provide a degree of protection IP3X (see 6.2.2). 5.3 Electrical requirements Insulating helmet shell shall pass a proof voltage test and a withstand voltage test according to 6.3.EN 50365:2002 - 6 - 5.4 Marking 5.4.1 The additional marking to those required by appropriate

33、 helmet standard shall be the following (see Figure 2): - symbol (double triangle); - class; - serial or batch number. 5.4.2 The marking shall be durable, clearly legible on the bottom of the helmet shell peak and shall not impair its quality. 5.4.3 If a colour code is used, the symbol (double trian

34、gle) shall be red. 5.5 Packaging The type of packaging suitable for transport shall be defined by the manufacturer. The packaging of each helmet shall have sufficient strength to protect the helmet from damage properly. The outside of packaging shall be marked with the name of the manufacturer or su

35、pplier, classification, size and design. 5.6 Instructions for use The instruction for use shall contain the information according to Annex B. 6 Tests 6.1 General Tests are type and sampling tests. For type tests, three helmet shells shall be used. A type test shall be performed on each helmet. 6.2 N

36、on-electrical tests 6.2.1 Visual inspection and dimensions The compliance with the requirements of 5.1 and 5.3 shall be checked. 6.2.2 Design of air-conditioning holes The helmet has to be tested on testing head form type K and D according to EN 960. The testing head forms have to be wrapped up in a

37、luminium foil. An electric circuit in the sense of a continuity check has to be built up between a IP3X testing wire according to EN 60529 and the aluminium foil in order to prove that there is an electric contact between both parts. Each air-conditioning hole has to be tested by a wire which fulfil

38、s the requirements of EN 60529. The wire has to be inserted as deep as possible. Then the wire shall be moved free in all directions. The test is considered as passed if the wire does not get in contact with the testing head form during the test.- 7 - EN 50365:2002 6.3 Electrical tests 6.3.1 General

39、 Electrical type tests shall be performed in a room where temperature is (23 2) C and (50 5) % relative humidity (see HD 437, standard atmosphere B). Electrical tests shall only be performed on whole helmet shells. Tests arrangements, power sources and procedures shall be in accordance with HD 588.1

40、/EN 60060-2. Type and sampling tests are destructive, therefore tested helmet shells shall be destroyed after the completion of the tests. 6.3.2 Test arrangement The helmet shell shall be fixed in an appropriated manner (see Figure 1). Then the tank and the inner side of the shell shall be filled wi

41、th tap water. The vertical clearance value d between the helmet shell bram and the level of water shall be the same inside and outside. The clearance value d shall be (20 3) mm for the proof voltage test according to 6.3.4 and (40 3) mm for the withstand voltage test according to 6.3.5. The water in

42、side the helmet shell shall be connected to the high voltage terminal of the supply. The water in the tank outside the helmet shell shall be connected to the ground. 6.3.3 Preconditioning Helmet shells submitted to test shall be treated preliminary on the internal and external surface with mechanica

43、l action by sand paper rougher than P 80 according ISO/DIS 6344-1 in order to remove eventual films of paints or other substances on the surface. The mechanical action shall not damage the underlying material. In case of helmet shells provided with air-conditioning holes, these holes shall be closed

44、 with insulating material. NOTE Holes can be closed with electricians putty or two-component adhesive. Then the helmet shells shall be preconditioned by immersing in tap water for at least (24 0,5) h. Before carrying out the test, the helmet shells shall be wiped off. The test shall not begin later

45、than 5 minutes after removing from the water tank. 6.3.4 Proof voltage test Each unit shall be submitted to a proof test voltage given in Table 1. The alternating voltage shall be initially applied at a low value and gradually increased at a constant rate-of rise of approximately 1 000 V/s until the

46、 specified voltage level is reached or failure occurs. For the type and the sampling tests the voltage shall be applied continuously for a duration of not less than 3 minutes. The test is considered as passed if the specified test voltage is reached and maintained for the specified duration and the

47、proof-test current does not exceed the relevant value specified in Table 1 at any time during the proof voltage test period.EN 50365:2002 - 8 - 6.3.5 Withstand voltage test Each unit shall be submitted to a withstand test voltage given in Table 1. The alternating voltage shall be applied gradually u

48、ntil the specified value is reached, then it shall be reduced immediately. The rate of change of voltage both up and down shall be 1000 V/s. The test is considered as passed if no puncture occurs. Table 1 - Proof test voltage, proof test current and withstand test voltage Class of Helmet Proof-test

49、voltage kV r.m.s. Proof-test current mA r.m.s. Withstand-test voltage kV r.m.s. 053 , 51 0 6.4 Marking The marking shall be rubbed for 15 s with water soaked lint free cloth and then rubbed for 15 s with a lint free cloth soaked in ethyl alcohol. The test shall be considered as passed if the marking remains easily legible and has not curled or become detached. In case of molded or engraved markings the test is considered as passed without executing. 6.5 Packaging Compliance with the requirements of 5.4 shall be verified by visual i