EN 50050-3-2013 en Electrostatic hand-held spraying equipment - Safety requirements - Part 3 Hand-held spraying equipment for ignitable flock.pdf

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1、BSI Standards PublicationBS EN 50050-3:2013Electrostatic hand-heldspraying equipment Safetyrequirements -Part 3: Hand-held spraying equipment forignitable flockBS EN 50050-3:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50050-3:2013. Together with BS EN 5

2、0050-1:2013 and BS EN 50050-2:2013 it supersedes BS EN 50050:2006 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EXL/31/-/1, Electrostatic spray guns.A list of organizations represented on this committee can be obtained on request to its secretary.Thi

3、s publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 75857 7ICS 29.260.20; 87.100Compliance with a British Standard cannot

4、confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2014.Amendments/corrigenda issued since publicationDate Text affectedBS EN 50050-3:2013EUROPEAN STANDARD EN 50050-3 NORME EUROPENNE EUROPISCHE NOR

5、M November 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form an

6、d by any means reserved worldwide for CENELEC members. Ref. No. EN 50050-3:2013 E ICS 87.100 Supersedes EN 50050:2006 (partially) English version Electrostatic hand-held spraying equipment - Safety requirements - Part 3: Hand-held spraying equipment for ignitable flock Equipement manuel de projectio

7、n lectrostatique - Exigences de scurit - Partie 3: Equipement manuel de projection de floque inflammable Elektrostatische Handsprheinrichtungen - Sicherheitsanforderungen - Teil 3: Handsprheinrichtungen fr entzndbaren Flock This European Standard was approved by CENELEC on 2013-10-14. CENELEC member

8、s 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 be obtained on application

9、 to the CEN-CENELEC Management Centre 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 the CEN-CENELEC M

10、anagement Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland,

11、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 50050-3:2013Contents Page Foreword . 3 0 Introduction 4 1 Scope 6 2 Normative references 7 3 Terms and defin

12、itions . 8 4 Requirements for hand-held spraying equipment for ignitable flock 10 4.1 General requirements . 10 4.2 Requirements for the accessories . 11 5 Tests . 12 5.1 General . 12 5.2 General tests 12 5.3 Conditioning test . 12 5.4 Tests for electrical safety . 13 5.5 Test of the maximum dischar

13、ge energy and the maximum transferred charge . 14 5.6 Tests of the accessories . 14 6 Information for use 14 6.1 General . 14 6.2 Instruction manual. 14 6.3 Marking of electrostatic hand-held spraying equipment and associated control devices 16 Annex A (normative) Test for ignition protection using

14、a shunt and an oscilloscope 19 Annex B (informative) Quality assurance systems for electrostatic spraying equipment 20 B.1 General . 20 B.2 Electrical assembly . 20 B.3 Mechanical assembly 21 B.4 Tests . 21 Annex ZY (informative) Significant changes between this European Standard and EN 50050:2006 2

15、2 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 23 Bibliography 24 Tables Table 1 Test intervals. 16 EN 50050-3:2013BS EN 50050-3:2013Foreword This document (EN 50050-3:2013) has been prepared by SC 31-8, “Electrostatic painting and finishing equipment“, of CLC/TC 31,

16、“Electrical apparatus for potentially explosive atmospheres“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-10-14 latest date by which the national standards conf

17、licting with this document have to be withdrawn (dow) 2016-10-14 In combination with EN 50050-1:2013 and EN 50050-2:2013, this document supersedes EN 50050:2006. 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 s

18、hall not be held responsible for identifying any or all such patent rights. This document has 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(s). For the relationship with EU Direct

19、ive(s) see informative Annex ZZ, which is an integral part of this document. EN 50050-3:2013BS EN 50050-3:20130 Introduction 0.1 Process In the process of electrostatic flock application, flock particles are transported from a reservoir to an applicator either by gravitational forces or within an ai

20、r stream. As the flock particles are passing the applicator, they are electrostatically charged and developed by means of a high voltage of some tens of kilovolts and ejected in the form of a cloud which is directed towards the workpiece. The flock particles of the cloud are attracted by the earthed

21、 workpiece and enclosed from a before served adhesive layer. They stick in this adhesive layer until the adhesive is set at room temperature or by heating. Flock particles not deposited on the workpiece (overspray) are removed by the exhaust ventilation system, by brushes or other devices into the f

22、lock recovery system. 0.2 Explosion hazards 0.2.1 An explosion can occur, if the concentration of flock particles in air is within the explosion limits, contamination by adhesives (in a cured condition most of the adhesives are insulating), and an ignition source of appropriate energy for this explo

23、sive atmosphere is present. Ignition sources could be, for instance, a hot surface, a naked flame, an electric arc or a spark. An explosion could be prevented, if at least one condition is avoided. Because it is very difficult to exclude the possibility of ignitable discharges completely, the main f

24、ocus should be the prevention of ignitable concentrations of flock in air. 0.2.2 Deflagration of explosive atmospheres is only possible within a given range of concentration, but not, if the concentration is above or below this range. NOTE If an explosive cloud of flock and air is trapped into a clo

25、sed room, an explosion can lead to a fatal increase of pressure. 0.2.3 It is important that deposits of flock are not allowed to accumulate within the spraying areas for they may be whirled up and give rise to an explosive atmosphere. This does not apply to deposits on filter devices and accumulatio

26、ns of flock in reservoirs where filters and reservoirs are integrated in the spraying area and are designed to collect the flock. 0.2.4 Particular attention should be paid to the prevention of electrostatic charges on different surfaces located in the vicinity of the flock cloud. This could apply to

27、 e.g. workpieces during the coating process. 0.3 Electric hazards 0.3.1 Electric shock (by direct or indirect contact) can be generated, for instance, by contact with null live parts, which are not insulated for operational reasons, null conductive parts, which are not connected to dangerous voltage

28、 during normal operation, but only in case of failure, null insulated live parts with insufficient or damaged insulation due to external impact. 0.3.2 Inadequate earthing may occur, for instance, due to null faulty connections to the protective earthing system, null a too high resistance to earth (e

29、. g. contamination by flock). EN 50050-3:2013BS EN 50050-3:20130.3.3 Hazards could occur, for instance, if hazardous malfunctions (e.g. shortcut of electronic safety circuits) occur due to interferences of the high voltage equipment and the components of the control and safety systems. 0.3.4 Hazardo

30、us electrostatic discharges could be generated, for instance, by non-earthed conductive components or by large insulating surfaces, especially if they are backed with conductive material. EN 50050-3:2013BS EN 50050-3:20131 Scope 1.1 This European Standard specifies the requirements for hand-held or

31、hand-operated electrostatic spraying equipment for ignitable flock within a temperature range from 5 C to 40 C to be used in explosive atmospheres generated by their own spray cloud. This European Standard deals with all electrical hazards significant for the electrostatic spraying of flock, which c

32、ould also contain small quantities of added metal particles, if the work is carried out under conditions recommended by the manufacturer. In particular, this includes ignition hazards resulting from the generated explosive atmosphere. This European Standard specifies the design-related and test requ

33、irements for electrostatic spraying equipment of type A-F and type B-F according to Table 1 of EN 50223:2010. 1.2 Electrostatic applicators are considered to be equipment of group II, category 3D for use in potentially explosive areas of zone 22. All other parts of hand-held electrostatic spraying e

34、quipment are considered to be equipment of category 3D if they are installed or used in potentially explosive areas of zone 22. NOTE 1 Solvent vapours which could be evaporated by workpieces coated with adhesives do not lead to a zone 2 in the flocking area. 1.3 In addition to the requirements above

35、, the requirements of EN 1953 applies with regard to all other significant hazards relevant for applicators (e.g. health hazards, inadequate ergonomics). 1.4 This European Standard does not apply to zone classification of the areas in and around spray booths see EN 50223, zone classification of othe

36、r areas with potentially explosive atmosphere see EN 60079-10-2, selection, erection and application of other electrical and non-electrical equipment in areas with explosion hazard see EN 60079-14 and EN 50223, cleaning of spraying areas, see instruction manual of the spray booth, fire prevention an

37、d protection, for instance fire hazards due to other sources see EN 50223, explosion protection systems see EN 50223, dust hazards see EN 12981. NOTE 2 Noise is not considered to be a significant hazard for hand-held spraying equipment for ignitable flock. EN 50050-3:2013BS EN 50050-3:20132 Normativ

38、e references 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 undated references, the latest edition of the referenced document (including any amendments) app

39、lies. EN 1953 Atomising and spraying equipment for coating materials Safety requirements EN 1149-5 Protective clothing Electrostatic properties Part 5: Performance requirements EN 12981 Coating plants Spray booths for application of organic powder coating material Safety requirements EN 50223:2010 S

40、tationary electrostatic application equipment for ignitable flock material Safety requirements EN 60079-7:2007 Explosive atmospheres Part 7: Equipment protection by increased safety “e“ (IEC 60079-7:2006) EN 60204-1 Safety of machinery Electrical equipment of machines Part 1: General requirements (I

41、EC 60204-1) EN 60529 Degrees of protection provided by enclosures (IP code) (IEC 60529) EN 61340-4-1 Electrostatics Part 4-1: Standard test methods for specific applications Electrical resistance of floor coverings and installed floors (IEC 61340-4-1) EN 62061 Safety of machinery Functional safety o

42、f safety-related electrical, electronic and programmable electronic control systems (IEC 62061) EN ISO 12100 Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO 12100) EN ISO 13849-1 Safety of machinery - Safety-related parts of control systems - Part 1: Gen

43、eral principles for design (ISO 13849-1) EN ISO 20344 Personal protective equipment Test methods for footwear (ISO 20344) EN 50050-3:2013BS EN 50050-3:20133 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hand-held spraying equipment hand-held

44、or hand-operated equipment for electrostatic coating using ignitable flock, generally comprising the following parts: applicator; flock supply system; control device; high voltage supply system; connecting cable 3.2 connecting cable electric cable to the applicator 3.3 earthing device device for ear

45、thing the hand-held spraying equipment permanently 3.4 spraying device outlet opening for the flock 3.5 high voltage electrode conductive part of the applicator which is at high voltage and serves to charge the coating material directly or indirectly 3.6 control device device generally having the fo

46、llowing functions: control of, for instance, the flock supply system, the control air, the purge air Note 1 to entry A combination of the control device and the high voltage supply according to 3.8 is possible. 3.7 applicator equipment for application of flock Note 1 to entry In general, the applica

47、tor comprises the following parts: - high voltage electrode; - high voltage supply (as far as integrated into the applicator); - housing; - spraying device; - exchangeable attachment parts (e.g. nozzles, extensions, angular pieces, etc.); - if applicable, battery unit (integrated fixedly, or attache

48、d). EN 50050-3:2013BS EN 50050-3:20133.8 high voltage supply for applicators in general, high voltage supply comprising the following parts: low voltage section with devices for switching on and off the hand-held spraying equipment and for adjustment, control, regulation, limitation and monitoring o

49、f current and voltage, as well as the required connecting cables; high voltage generator 3.9 spraying area area, closed or not, in which the flock is applied to the workpiece by the hand-held spraying equipment 3.10 dangerous discharge discharge which generates the hazard of ignition of explosive mixtures or of electric shock 3.11 flock supply system in general, flock supply system comprising the following: flock reservoir; dosing devices for flock; supply lines for flock; devices for