1、BRITISH STANDARD BS EN 50059:1991 Specification for Electrostatic hand-held spraying equipment for non-flammable material for painting and finishing This European Standard EN50059:1990 has the status of a BritishStandardBSEN50059:1991 This BritishStandard was published under the authority ofthe Boar
2、d of BSI and comes intoeffect on 28February1991 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference GEL/114 Draft for comment83/20345 DC ISBN 0 580 193241 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), und
3、er whose supervision this European Standard was prepared, comprises the National Committees of the following countries: Austria Italy Belgium Luxemburg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since pu
4、blication Amd. No. Date of issue CommentsBSEN50059:1991 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Text of EN50059 3 National appendix NA 12 National appendix NB Inside back coverBSEN50059:1991 ii BSI 01-2000 National foreword This BritishStandard h
5、as been prepared under the direction of the General Electrotechnical Standards Policy Committee and is the English language version of EN50059 “Specification for electrostatic hand-held spraying equipment for non-flammable material for painting and finishing”. Cross-references. Where there are Briti
6、shStandards corresponding to IECpublications, European Standards and CENELEC Harmonization Documents quoted in this standard the relationship is given in National appendix NB. Product certification. Users of this BritishStandard are advised to consider the desirability of third party certification o
7、f product conformity with this BritishStandard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS5750. Enquiries as to the availability of third party certification schemes will be forwarded by BSI to t
8、he Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of Britis
9、h 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 front cover, pagesi andii, theEN title page, pages2 to12, an inside back cover an
10、d 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 EN50059 February1990 UDC 667.661.23-83:621.319.7:620.1:614.83 Descri
11、ptors: Electrical apparatus, non-flammable spraying material, hand-held electrostatic spraying equipment, constructional requirement English version Specification for electrostatic hand-held spraying equipment for non-flammable material for painting and finishing Spcifications pour les quipements ma
12、nuels de projection lectrostatique de produits ininflammables pour peinture et finition Bestimmungen fr elektrostatische Handsprheinrichtungen fr nichtbrennbare Sprhstoffe fr Beschichtungen This European Standard was approved by CENELEC on9December1986. CENELEC members are bound to comply with the C
13、EN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date list and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to
14、 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 Central Secretariat has the same status as the official
15、versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Sta
16、ndardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1990 Copyright reserved to CENELEC members Ref. No. EN50059:1990 EEN50059:1991 BSI 01-2000 2 IEC Publications referred to in European
17、 Standard EN50059: IEC664:1980 and664A:1981 Insulation co-ordination within low-voltage systems including clearances and creepage distances for equipment. European Standards referred to in European Standard EN50059: CENELEC Harmonization document referred to in European Standard EN50059: HD365S3 Cla
18、ssification of degrees of protection provided by enclosures IEC529:1976 and amendments1 and2. Contents Page 1 Scope 3 2 Definitions 3 3 Constructional requirements 3 4 Supply of spraying material 4 5 Type verifications and tests 5 6 Manufacturers responsibility 7 7 Marking 7 8 Instruction manual 7 A
19、nnex A 11 Annex B 11 Figure 1 8 Figure 2 8 Figure 3 8 Figure 4 8 Figure 5 8 Figure 6 8 Figure 7 9 Figure 8 9 Figure 9 9 Figure 10 Example of test rig for impact test 10 EN50014:1977 (1st edition) Electrical apparatus for potentially explosive atmospheres General requirements including amendment1 (Ju
20、ly1979), amendment2 (June1982), amendment3 (December1982), amendment4 (December1982) and amendment5 (February1986). EN50019:1977 (1st edition) Electrical apparatus for potentially explosive atmospheres Increased safety“e” including amendment1 (July1979), amendment2 (September1983) and amendment3 (De
21、cember1985). EN50020:1977 (1st edition) Electrical apparatus for potentially explosive atmospheres Intrinsic safety “i” including amendment1 (July1979) and amendment2 (December1985). EN50050:1986 (1st edition) Electrical apparatus for potentially explosive atmospheres Electrostatic hand-held sprayin
22、g equipment.EN50059:1991 BSI 01-2000 3 1 Scope This European Standard specifies the constructional and test requirements for hand-held and hand-operated electrostatic spray guns and associated apparatus used to spray painting and finishing materials which are not flammable, with respect to the prote
23、ction against high voltage electric shock. NOTEThe requirements for electrostatic hand-held spray guns and associated apparatus which are only to be used for flammable spraying materials are covered in European Standard EN50050. 2 Definitions The following definitions, specific to electrostatic spra
24、y guns and associated apparatus, are applicable to this European Standard. 2.1 Hand-held electrostatic spraying equipment Equipment for producing, charging and depositing suspended particles with the assistance of electric fields. It consists in general of the following parts: spray gun, high voltag
25、e generator, connecting cable and means of supplying spraying material. 2.1.1 spray gun the part of the electrostatic spraying equipment from which the charged spraying material emerges and which is held and operated by the hand 2.1.2 high voltage electrode a conducting part of the spray gun which i
26、s at high potential and which charges the spraying material 2.1.3 high voltage generator the part of the equipment for producing the high voltage and the current required NOTEThe high voltage generator can be, in certain cases, incorporated in the spray gun. 2.1.4 connecting cable all cables to the
27、spray gun, including any necessary high voltage supply cable 2.1.5 earth terminal a terminal intended to provide means for reliable earthing for parts of an equipment 2.1.6 associated apparatus all the electrical apparatus required to generate and control the electrostatic voltage of the spray gun 2
28、.1.7 spraying material supply that part of the equipment which supplies the spraying material at a convenient pressure to the spray gun 2.2 workpiece the article on which the spraying material is to be deposited 2.3 non-flammable spraying material the material which is applied by means of the electr
29、ostatic hand-held spraying equipment and which cannot be ignited, when in any mixture with air, by an energy source less than500mJ 2.4 U max the maximum rated voltage of the high voltage generator 2.5 functional extra-low voltage without electrical separation a voltage which does not exceed50V (r.m.
30、s.) a.c. or120V d.c. with a maximum ripple of10%, between conductors or between any conductor and earth, and the source of which has one part of the circuit connected directly to earth 2.6 touchable parts in normal use those parts of the spray gun which are permissible to handle when the spray gun i
31、s in normal use 3 Constructional requirements 3.1 General requirements Electrical apparatus for spraying non-flammable material shall comply with the requirements of this European Standard. 3.2 Mechanical requirements 3.2.1 The spray gun shall withstand the impact and drop tests in5.7 and5.8 of this
32、 European Standard. 3.2.2 The spray gun handle shall have a total surface area of at least20cm 2 , of metal or a material the maximum resistivity of which is107m. This area shall be connected to the earth terminal (see3.3.2). 3.2.3 All cables shall be attached securely to the spray gun (see5.9).EN50
33、059:1991 4 BSI 01-2000 3.3 Electrical requirements 3.3.1 Any cable to the spray gun, other than that carrying only functional extra-low voltage circuits without electrical separation shall include an earthed metallic screen protected by an insulating sheath. If this is not possible in the case of th
34、e high voltage cable due to design reasons, any other construction shall be tested in accordance with5.6.2. 3.3.2 All the non-current carrying conductive parts of the spray gun other than those designed to acquire a high potential shall be assembled so that they remain in electrical contact with eac
35、h other. These conductive parts shall be connected to the earth terminal in the power supply of the high voltage generator by means of terminals of the type described in Annex A or other connections which are equally reliable. NOTE 1A method of connection between the metal parts of the spray gun and
36、 the earth terminal in the power supply of the high voltage generator is via the metallic screen referred to in3.3.1 above. NOTE 2In the case where the generator is incorporated in the spray gun, the conductive parts of the spray gun must be efficiently connected to a good earth. 3.3.3 All the elect
37、rical components of a spray gun with the exception of the high voltage electrode shall comply with the degree of protection of IP54 as defined in HD365S3. 3.3.4 The spray gun shall pass a voltage test of1,2U maxbetween the high voltage circuit and all parts of the spray gun which are touchable in no
38、rmal operational use while spraying (this will require the suppression of corona current from the high voltage electrode, see5.6.1). 3.3.5 The high voltage cable shall be capable of withstanding a voltage test of1,5U max(see5.6.2). 3.3.6 The operating trigger of the spray gun shall be biased towards
39、 the OFF position. The trigger, when released, shall switch off the high voltage supply and the spraying material supply to the spray gun within2s. Multi outlet high voltage supplies shall not be used unless isolation for each high voltage outlet can be achieved by release of the operating switch of
40、 the spray gun connected to the outlet concerned. 3.3.7 Any current limiting resistor used in the spray gun or the associated apparatus shall be so mounted, insulated and protected that it is immune from short circuit and shall be so rated that it is undamaged when a short circuit occurs between the
41、 high voltage electrode of the spray gun and earth for5min. 3.3.8 Components on which safety in respect of high voltage electric shock depends and which are built into the high voltage supply shall be connected, assembled, etc., so that the safety of the device cannot be prejudiced. 3.3.9 If Zener d
42、iodes are used to limit the high voltage, they shall be duplicated (connected in parallel). Zener diodes and components, except transformers, on which safety depends shall not be operated at more than2/3 of their manufacturers rating under a one fault condition (refer also to4.2 and7.6 of EN50020).
43、3.3.10 Potentiometers whose adjustment could increase the maximum tested high voltage output shall not be capable of re-adjustment. The locking of the adjustment shall be durable and permanent. 3.3.11 The maximum capacitance of the whole system, e.g.high voltage generator and its high voltage cable,
44、 spraying material container and its hoses insulated from earth, shall not exceed2000pF, see5.5.4. 3.3.12 The shock current to a human being from a touchable part in normal operational use of the system, shall be limited by a limiting resistance of not less than10k7 per kilovolt of U maxDependent on
45、 the design of the system this resistance can be the resistance of the spraying material in the hose, or a resistor in the high voltage supply lead in the spray gun or a combination of both, see Figure 1 to Figure 9. 3.3.13 The maximum energy from the whole system available in the form of an electri
46、cal discharge to a human being from a touchable part shall not exceed350mJ, see also5.5.4. 3.3.14 The total direct current continuously available from a touchable part shall not exceed2mA. 4 Supply of spraying material 4.1 Spraying material container 4.1.1 If the container is made of conductive mate
47、rial it shall be provided with a means for connecting to earth (see4.1 in Figure 1, Figure 3 and Figure 5). 4.1.2 If the container is made of non-conducting material it shall be equipped with an earthed conductive connection. This connection shall be in contact with the spraying material (see5.2 in
48、Figure 2 and Figure 6 and12.1 in Figure 4). R 1W U max(kV) 1 kV -10 k7 EN50059:1991 BSI 01-2000 5 4.1.3 If, for technical or other reasons, it is not possible to comply with4.1.1 or4.1.2 then precautions shall be taken so that the container or exposed parts at high voltage cannot be touched (see14 i
49、n Figure 7, Figure 8 and Figure 9). These precautions shall take the form of either 4.1.3.1 an earthed metal enclosure around the container and the parts at high voltage or 4.1.3.2 an insulating enclosure capable of withstanding a test voltage of1,5U maxincorporating, within the creepage paths from parts at high voltage to accessible parts, an earthed guard ring. There shall also be a minimum clearance distance of100mm from the container and any part at high voltage to the touchable parts of the enclosure. 4.1.3.3 Means
