SIST EN 50050-2:2014

Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held spraying equipment for ignitable coating powder

This European Standard specifies the requirements for hand-held or hand-operated electrostatic spraying equipment for ignitable coating powders 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 coating powders, which could 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 requirements for electrostatic spraying equipment of type A-P according to Table 1 of EN 50177:2009. With regard to explosion protection and prevention measures, this standard also applies to ionisators with corona charging. Ionisators used together with or under similar conditions as electrostatic spraying equipment for ignitable coating powders are considered to be equipment of group II, category 2D for use in potentially explosive areas of zone 21 or 22. All other parts of ionisators are considered to be equipment of category 3D if they are installed or used in potentially explosive areas of zone 22, see Annex D. Electrostatic applicators are considered to be equipment of group II, category 2D for use in potentially explosive areas of zone 21 or 22, which have been generated by the equipment itself. All other parts of hand-held electrostatic spraying equipment are considered to be equipment of category 3D if they are installed or used in potentially explosive areas of zone 22. All other significant hazards relevant for applicators (e.g. ejection of powder, mechanical strength, electrical hazards (apart from the electrostatic hazards)), noise, explosion, contract with or inhalation of dangerous substances, ergonomics) are covered by EN 1953. This European Standard also gives details regarding quality assurance systems for electrostatic spraying equipment, see Annex C. Additional requirements may be applicable to equipment designed for use in food and pharmaceutical industry.

Elektrostatische Handsprüheinrichtungen - Sicherheitsanforderungen - Teil 2: Handsprüheinrichtungen für entzündbares Beschichtungspulver

Equipement manuel de projection électrostatique - Exigences de sécurité - Partie 2: Equipement manuel de projection de poudre de revêtement inflammable

1.1 La présente Norme Européenne spécifie les exigences relatives aux matériels portatifs de projection électrostatique ou aux matériels actionnés manuellement pour poudres de revêtement inflammables dans une plage de températures de 5 °C à 40 °C utilisées en atmosphères explosives, celles-ci étant générées par leur propre nuage de projection. La présente Norme Européenne traite de tous les dangers électriques importants concernant la projection électrostatique des poudres de revêtement, susceptibles de contenir également de faibles quantités de particules métalliques additionnelles, si les travaux sont menés à bien dans des conditions recommandées par le fabricant. En particulier, ceci inclut les risques d'inflammation résultant de l'atmosphère explosive ainsi produite. La présente Norme Européenne spécifie les exigences relatives à la conception et aux essais des matériels de projection électrostatique de type A-P, conformément au Tableau 1 de la EN 50177:2009. 1.2 En ce qui concerne les mesures de protection contre l'explosion et de prévention de l'explosion, la présente Norme s'applique également aux ioniseurs avec charge par effet couronne. Les ioniseurs utilisés avec ou sous des conditions similaires en tant que matériels de projection électrostatique pour poudres de revêtement inflammables sont considérés comme étant des matériels de groupe II, catégorie 2D, pour une utilisation dans des emplacements potentiellement explosifs de la zone 21 ou de la zone 22. Toutes les autres parties des ioniseurs sont considérées comme des matériels de catégorie 3D, si elles sont installées ou utilisées dans des emplacements potentiellement explosifs de la zone 22. 1.3 Les applicateurs électrostatiques sont considérés comme des matériels de groupe II, catégorie 2D pour une utilisation dans des emplacements potentiellement explosifs de la zone 21 ou de la zone 22, qui sont le résultat du fonctionnement du matériel lui-même. Toutes les autres parties des matériels manuels de projection électrostatique sont considérées comme des matériels de catégorie 3D, si elles sont installées ou utilisées dans des emplacements potentiellement explosifs de la zone 22; voir l'Annexe D. 1.4 Tous les autres phénomènes dangereux importants qui ont rapport aux applicateurs (par exemple, éjection de poudre, résistance mécanique, dangers électriques (à part les dangers électrostatiques), bruit, explosion, contact avec des substances dangereuses ou inhalation de celles-ci, ergonomie).sont couverts par la EN 1953. 1.5 La présente Norme Européenne donne également des détails relatifs aux systèmes d'assurance qualité pour le matériel de projection électrostatique (voir Annexe C). 1.6 Des exigences supplémentaires peuvent être applicables aux matériels conçus pour être utilisés dans l'industrie alimentaire et dans l'industrie pharmaceutique. 1.7 La présente Norme Européenne n’est pas applicable  à la classification en zones des emplacements dans et autour des cabines de pulvérisation [voir la EN 12981],  à la classification en zones d'autres emplacements comportant une atmosphère potentiellement explosive [voir la EN 60079-10-2],  au choix, au montage et à l'utilisation d'autres matériels électriques et non électriques dans les emplacements comportant un danger d'explosion [voir la EN 60079-14 et la EN 12981],  au nettoyage des emplacements de projection, voir le manuel d'instructions du matériel de projection,  à la prévention de l'incendie et à la protection contre l'incendie. Par exemple: les dangers d'incendie dus à d'autres sources [voir la EN 12981],  aux phénomènes dangereux relatifs aux poussières [voir la EN 12981].

Oprema za ročno elektrostatično brizganje - Varnostne zahteve - 2. del: Ročna oprema za brizganje vnetljivega prekrivnega prahu

Ta evropski standard določa zahteve za ročno opremo za elektrostatično brizganje vnetljivega prekrivnega prahu v temperaturnem območju od 5 °C do 40 °C, ki se uporablja v eksplozivnih atmosferah, ki jih ustvari njihov lastni oblak prahu. Ta evropski standard zajema vse električne nevarnosti, ki se pojavijo pri elektrostatičnem brizganju prekrivnih prahov, ki lahko vsebujejo tudi manjše količine dodanih kovinskih delcev, če se delo izvaja pod pogoji, ki jih priporoča proizvajalec. To zajema zlasti nevarnost vžiga zaradi ustvarjene eksplozivne atmosfere. Ta evropski standard določa zahteve, povezane z zasnovo in preskušanjem, za elektrostatično opremo za brizganje vrste A–P v skladu s tabelo 1 standarda EN 50177:2009. V okviru zaščite pred eksplozijami in preventivnih ukrepov se ta standard uporablja tudi za ionizatorje s koronskim polnjenjem. Ionizatorji, ki se uporabljajo skupaj z opremo za elektrostatično brizganje vnetljivega prekrivnega prahu ali pod podobnimi pogoji, sodijo v skupino II, kategorijo 2D za uporabo v potencialno eksplozivnih okoljih con 21 ali 22. Vsi ostali deli ionizatorjev so oprema, ki sodi v kategorijo 3D, če so nameščeni in se uporabljajo v potencialno eksplozivnih območjih cone 22; glejte dodatek D. Elektrostatične naprave za nanašanje sodijo v skupino II, kategorijo 2D za uporabo v potencialno eksplozivnih okoljih con 21 ali 22, ki jih ustvari oprema sama. Vsi ostali deli ročne opreme za elektrostatično brizganje sodijo v kategorijo 3D, če so nameščeni in se uporabljajo v potencialno eksplozivnih območjih cone 22. Vse ostale večje nevarnosti, povezane z opremo za nanašanje (npr. nanašanje prahu, mehanska trdnost, nevarnosti zaradi elektrike (razen elektrostatičnih nevarnosti), hrup, eksplozija, stik z nevarnimi snovmi ali njihovo vdihavanje, ergonomika), so zajete v standardu EN 1953. Ta evropski standard navaja tudi podrobnosti glede sistemov zagotavljanja kakovosti za opremo za elektrostatično brizganje; glej dodatek C. Za opremo, zasnovano za uporabo v živilski in farmacevtski industriji, morda veljajo dodatne zahteve.

General Information

• Status: Published
• Public Enquiry End Date: 29-Oct-2011
• Publication Date: 18-Mar-2014
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• ICS: 87.100 - Paint coating equipment
• Technical Committee: EXP - Electrical apparatus for explosive atmospheres
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 17-Dec-2013
• Due Date: 21-Feb-2014
• Completion Date: 19-Mar-2014
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Directive: 94/9/EC - Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: EN 50050-2:2013 - Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held spraying equipment for ignitable coating powder

Relations

• Revised: SIST EN 50050:2007 - Electrical apparatus for potentially explosive atmospheres - Electrostatic hand-held spraying equipment
• Effective Date: 23-Jul-2014
• Revised: SIST EN 50050:2007 - Electrical apparatus for potentially explosive atmospheres - Electrostatic hand-held spraying equipment
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50050-2:2014
01-maj-2014
1DGRPHãþD
SIST EN 50050:2007
2SUHPD]DURþQRHOHNWURVWDWLþQREUL]JDQMH9DUQRVWQH]DKWHYHGHO5RþQD
RSUHPD]DEUL]JDQMHYQHWOMLYHJDSUHNULYQHJDSUDKX
Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held
spraying equipment for ignitable coating powder
Elektrostatische Handsprüheinrichtungen - Sicherheitsanforderungen - Teil 2:
Handsprüheinrichtungen für entzündbares Beschichtungspulver
Equipement manuel de projection électrostatique - Exigences de sécurité - Partie 2:
Equipement manuel de projection de poudre de revêtement inflammable
Ta slovenski standard je istoveten z: EN 50050-2:2013
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
87.100 Oprema za nanašanje Paint coating equipment
premazov
SIST EN 50050-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50050-2:2014

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SIST EN 50050-2:2014

EUROPEAN STANDARD
EN 50050-2

NORME EUROPÉENNE
November 2013
EUROPÄISCHE NORM

ICS 87.100 Supersedes EN 50050:2006 (partially)


English version


Electrostatic hand-held spraying equipment -
Safety requirements -
Part 2: Hand-held spraying equipment for ignitable coating powder



Equipement manuel de projection Elektrostatische Handsprüheinrichtungen -
électrostatique - Sicherheitsanforderungen -
Exigences de sécurité - Teil 2: Handsprüheinrichtungen für
Partie 2: Equipement manuel de entzündbares Beschichtungspulver
projection de poudre de revêtement
inflammable






This European Standard was approved by CENELEC on 2013-10-14. 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 be obtained on
application 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 Management 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50050-2:2013 E

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SIST EN 50050-2:2014
EN 50050-2:2013 - 2 -

Contents
Page
Foreword . 3
0 Introduction . 4
0.1 Process . 4
0.2 Explosion hazards . 4
0.3 Electric hazards . 4
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements for hand-held spraying equipment for ignitable coating powders . 11
4.1 General requirements . 11
4.2 Special requirements for hand-held spraying equipment with corona charging . 11
4.3 Requirements for the accessories . 12
5 Tests . 12
5.1 General . 12
5.2 General tests . 12
5.3 Conditioning test . 13
5.4 Tests for electrical safety (not applicable to triboelectrical applicators) . 13
5.5 Ignition test . 14
5.6 Tests of the accessories . 14
6 Information for use . 15
6.1 General . 15
6.2 Instruction manual. 15
6.3 Marking of electrostatic hand-held spraying equipment and associated control
devices . 17
Annex A (normative) Test for ignition protection using a shunt and an oscilloscope . 20
Annex B (normative) Ignition test within the gas mixture . 21
B.1 General . 21
B.2 Preparations . 21
B.3 Preliminary test . 21
B.4 Test. 22
B.5 Result . 22
Annex C (informative) Quality assurance systems for electrostatic spraying equipment . 23
C.1 General . 23
C.2 Electrical assembly . 23
C.3 Mechanical assembly . 24
C.4 Tests . 24
Annex D (normative) Requirements for explosion protection and prevention for ionisators . 25
Annex ZY (informative) Significant changes between this European Standard and
EN 50050:2006 . 26
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives . 28
Bibliography . 29
Tables
Table 1 — Test intervals . 17
Table D.1 — Requirements for ionisators . 25

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SIST EN 50050-2:2014
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Foreword
This document (EN 50050-2:2013) has been prepared by SC 31-8, "Electrostatic painting and finishing
equipment", of CLC/TC 31, "Electrical apparatus for potentially explosive atmospheres".

The following dates are fixed:

(dop) 2014-10-14
• latest date by which this document has to be
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2016-10-14
conflicting with this document have to
be withdrawn

In combination with EN 50050-1:2013 and EN 50050-3:2013, 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] shall 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 Directive(s) see informative Annex ZZ, which is an integral part of this
document.

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SIST EN 50050-2:2014
EN 50050-2:2013 - 4 -
0 Introduction
0.1 Process
During the electrostatic coating process the coating powder is transported in an air stream, or by air,
from a powder hopper or other container, up to an applicator. As the powder particles are passing the
applicator they are electrostatically charged by means of a high voltage in the range of some tens of
kilovolts or triboelectrically and ejected in the form of a cloud which is directed towards the workpiece.
The charged powder particles of the cloud are attracted by and applied to the earthed workpiece.
Powder, that is not applied to the workpiece (overspray) is removed by a exhaust ventilation system or
other means and transported into the powder recovery unit.
After the coating process the workpieces are introduced into an oven where the powder is melted and
cured into a coherent coating.
0.2 Explosion hazards
0.2.1 An explosion can occur, if
 the concentration of coating powder in air is above the lower explosion limit,
 an ignition source of appropriate energy for this coating powder cloud 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 focus should be the prevention of
ignitable concentrations of coating powder in air.
0.2.2 Deflagration of explosive atmospheres is only possible within a given range of concentration
above the lower explosion limit.
NOTE 1  If an explosive cloud of coating powder and air is trapped into a closed room, an explosion can lead to a
fatal increase of pressure.
NOTE 2  The particle size distribution of coating powder is usually in the range of 5 µm to 120 µm.
NOTE 3 Coating powder in air is not evenly distributed inside a given volume, therefore it is possible that a
part of the mixture is within the ignitable concentration range. An upper limit is safety-related not applicable.
0.2.3 It is important that deposits of powder 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 accumulations of coating powder in hoppers where filters and hoppers
are integrated in the spraying area and are designed to collect the coating powder. See 4.6 of
EN 12981:2005.
0.2.4 Particular attention should be paid to the prevention of electrostatic charges on different
surfaces located in the vicinity of the powder cloud. This could apply to e.g. workpieces during the
coating process. Grounding is very critical to the prevention of electrostatic charge to any conductive
objects in the spray area.
0.3 Electric hazards
0.3.1 Electric shock (by direct or indirect contact) can be generated, for instance, by contact with
– live parts, which are not insulated for operational reasons,
– conductive parts, which are not connected to dangerous voltage during normal operation, but only
in case of failure,
– insulated live parts with insufficient or damaged insulation due to external impact.
0.3.2 Inadequate earthing may occur, for instance, due to
– faulty connections to the protective earthing system,
– a too high resistance to earth (e. g. contamination by coating powder).

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SIST EN 50050-2:2014
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0.3.3 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 Hazardous 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.

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EN 50050-2:2013 - 6 -
1 Scope
1.1 This European Standard specifies the requirements for hand-held or hand-operated electrostatic
spraying equipment for ignitable coating powders 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
coating powders, which could 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 requirements for electrostatic spraying equipment of type A-P according to
Table 1 of EN 50177:2009.

1.2 With regard to explosion protection and prevention measures, this standard also applies to
ionisators with corona charging. Ionisators used together with or under similar conditions as
electrostatic spraying equipment for ignitable coating powders are considered to be equipment of
group II, category 2D for use in potentially explosive areas of zone 21 or 22. All other parts of
ionisators are considered to be equipment of category 3D if they are installed or used in potentially
explosive areas of zone 22, see Annex D.
1.3 Electrostatic applicators are considered to be equipment of group II, category 2D for use in
potentially explosive areas of zone 21 or 22, which have been generated by the equipment itself. All
other parts of hand-held electrostatic spraying equipment are considered to be equipment of category
3D if they are installed or used in potentially explosive areas of zone 22.
1.4 All other significant hazards relevant for applicators (e.g. ejection of powder, mechanical
strength, electrical hazards (apart from the electrostatic hazards)), noise, explosion, contract with or
inhalation of dangerous substances, ergonomics) are covered by EN 1953.
1.5 This European Standard also gives details regarding quality assurance systems for electrostatic
spraying equipment, see Annex C.
1.6 Additional requirements may be applicable to equipment designed for use in food and
pharmaceutical industry.
1.7 This European Standard does not apply to
 zone classification of the areas in and around spray booths [see EN 12981],
 zone classification of other 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 12981],
 cleaning of spraying areas, see instruction manual of the spray booth,
 fire prevention and protection, for instance fire hazards due to other sources [see EN 12981],
 dust hazards [see EN 12981].

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SIST EN 50050-2:2014
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2 Normative 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) applies.

EN 1149-5 Protective clothing – Electrostatic properties – Part 5: Performance
requirements
EN 1953 Atomising and spraying equipment for coating materials –
Safety requirements
EN 12981:2005 Coating plants – Spray booths for application of organic powder
coating material – Safety requirements
EN 50177:2009 Stationary electrostatic application equipment for ignitable coating
powders – Safety requirements
EN 60079-0 Explosive atmospheres - Electrical apparatus for explosive gas
atmospheres –
Part 0: General requirements (IEC 60079-0)
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 (IEC 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 of 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: General principles for design (ISO 13849-1)
EN ISO 20344 Personal protective equipment – Test methods for footwear
(ISO 20344)

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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
hand-held spraying equipment
hand-held or hand-operated equipment for electrostatic coating using ignitable coating powders,
generally comprising the following parts:
 applicator (with corona charging or triboelectric charging);
 coating powder supply system;
 control device;
 high voltage supply system for corona charging (can be integral to the applicator);
 connecting cable
3.2
connecting cable
electric cable to the applicator
3.3
earthing device
device for earthing the hand-held spraying equipment permanently
Note 1 to entry Triboelectric applicators (see 3.8) are generally earthed by the recirculation of the tribo-
current.
3.4
spraying device
outlet opening for the coating powder
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 following functions:
 control of, for instance, the coating powder supply system, the control air, the purge air;
 measurement of recirculated tribo-current at triboelectrical equipment
Note 1 to entry A combination of the control device and the high voltage supply according to 3.9 is possible.
3.7
applicator with corona charging
equipment for application of coating powder with corona charging
Note 1 to entry In general, the applicator 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 attached).

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3.8
triboelectric applicator
equipment for application of coating powder with triboelectric charging (tribo-charge)
Note 1 to entry In general, the applicator comprises the following parts:
- charging system;
- housing;
- powder feed line;
- spraying device;
- device for recirculation of tribo-current (earthing);
- exchangeable attachment parts (e.g. nozzles, extensions, angular pieces, etc.).
3.9
high voltage supply for applicators with corona charging
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 of current and voltage, as well as the
required connecting cables;
 high voltage generator
3.10
spraying area
area, closed or not, in which the coating powder is applied to the workpiece by the hand-held spraying
equipment
3.11
dangerous discharge
discharge which generates the hazard of ignition of explosive mixtures or of electric shock
3.12
coating powder supply system
in general, coating powder supply system comprising the following:
 powder hopper, or supply container;
 dosing devices for coating powder;
 supply lines for coating powder;
 devices for drive, control and monitoring powder delivery
3.13
workpiece
article to which the coating powder is applied
3.14
ignitable coating powder
coating powder which, in a whirled-up state, could be ignited by an effective ignition source and which
continues to burn after the ignition source has been removed or may react in the form of an explosion
3.15
explosive atmosphere
mixture of air, under atmospheric conditions, and of ignitable substances in the form of gas, vapour,
mist, powder or flock, in such proportions that it can be ignited by effective ignition sources, such as
excessive temperature, arcs or sparks
Note 1 to entry See EN 1127-1.

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3.16
Lower Explosion Limit
LEL
concentration of ignitable gas, vapour, mist, powder or flock in air below which an explosive
atmosphere will not be formed
3.17
discharge energy
energy discharged from a conductive part of the installation in form of a spark which could cause both
electric shock to a person and an ignition of an explosive atmosphere
3.18
antistatic footwear
footwear that has a resistance to earth via its sole, which is low enough to prevent the build-up of
electrostatic charges capable to produce an incendive discharge
Note 1 to entry See EN ISO 20344.
Note 2 to entry A required electric insulating resistance to prevent electric shocks is not contradictory to this
definition.
3.19
antistatic clothes
clothes that have a resistance to earth, which is low enough to prevent the build-up of electrostatic
charges capable of an incendive discharge
Note 1 to entry See EN 1149-5.
Note 2 to entry A required electric insulating resistance to prevent electric shocks is not contradictory to this
definition.
3.20
antistatic floor
floor that has a resistance to earth, which is low enough to prevent the build-up of electrostatic
charges capable to produce an incendive discharge
3.21
accessories
accessories are all devices, components and other equipment, except for 3.7 and 3.8 of this standard
3.22
U
max
maximum output voltage of the high-voltage generator
3.23
I
max
maximum output current of the high-voltage generator
3.24
repeated test
test of the hand-held spraying equipment, including all accessories, to be carried out at regular
intervals
3.25
ionisator
an ionisator is a device to discharge electrostatic charge e.g. from workpieces
3.26
contact surface area
part of the handle connected to earth to discharge the charge of a person

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SIST EN 50050-2:2014
- 11 - EN 50050-2:2013
4 Requirements for hand-held spraying equipment for ignitable coating
powders
4.1 General requirements
4.1.1 Hand-held spraying equipment shall be designed and constructed to prevent exceeding the
maximum transferred charge of single sparks of 200 nC, or the maximum discharge energy of 2 mJ.
4.1.2 All conductive parts of the hand-held spraying equipment which are not at high voltage
potential shall be earthed. Earthing of conductive parts inside the hand-held spraying equipment can
be neglected if hazardous discharges have been prevented by design. Conductive parts connected to
measuring and control circuits shall be earthed with a resistance of ≤ 100 MΩ. Parts which are at high
voltage for operational reasons shall be bonded to each other in a conductive way.
4.1.3 Applicators shall meet the applicable requirements of EN 1953.
4.1.4 Electrical connecting cables shall be connected to the applicator or associated equipment in a
secured way. Requirements of 5.3.1 shall be fulfilled.
4.1.5 The handle of the applicator shall have a contact surface area of conductive material of at
least 20 cm². This contact surface area shall be earthed, and the resistance to earth shall not exceed
1 MΩ.
4.1.6 Operating triggers of the applicators shall be biased to the off position. In this position, the
coating material supply system shall be cut-off immediately, and the high voltage supply shall be cut-
off within 2 s. For high voltage supplies having several outputs, the cut-off function shall be ensured
for each output/applicator individually.
4.1.7 Applicators shall have an earth connection. The resistance to earth shall not exceed 1 MΩ.
The connection shall be designed in accordance with 4.2.1 of EN 60079-7:2007.
4.1.8 Components on which ignition safety depends shall be designed, arranged and built in to not
impair the safety of the electrostatic hand-held spraying equipment. Examples of components on
which ignition safety depends are spray nozzles, cables of the earthing system, resistors and other
electronic components.
Insulating materials of parts under high-voltage shall be constructed according to the operation,
transport and storage conditions
4.1.9 The electric equipment not connected to the high voltage system shall comply with
EN 60204-1.
4.1.10 It shall be ensured that the limit values for maximum discharge energy and maximum
transferred charge defined in 4.1.1 are observed under any operating conditions. Faults of the high
voltage supply for applicators shall be considered. This safety function (monitoring function) shall meet
the requirements of SIL 1 (e.g. according to EN 62061) or PL c (e.g. according to EN ISO 13849-1).
Alternatively, this safety level will be reached if the values for outlet current and outlet voltage
according to 5.4.1 will be limited by two Zener diodes or equivalent parts (e.g. power semiconductors)
loaded up to two-thirds in the case of failure.
In general, the fail-safe principle shall be applied.
In case of failure of the safety functions the hand-held spraying equipment shall be led in a safe state.
If the safety related functions of the hand-held spraying equipment depend on software, hazards due
to program errors shall be considered in particular.
4.2 Special requirements for hand-held spraying equipment with corona charging
4.2.1 All components shall withstand a short circuit between the high voltage electrode and earth for
5 min. The degree of protection shall remain unchanged.

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SIST EN 50050-2:2014
EN 50050-2:2013 - 12 -
4.2.2 All electrical components of the applicator, other than the spraying device shall be constructed
at least comparable with IP64 of EN 60529. As an alternative, the applicator, except for the spraying
device, can be designed according to IP64 according to EN 60529.
4.2.3 Electrical cables connected to the applicator shall have an earthed shielding which is
protected against mechanical damage (e.g. by insulation).
4.3 Requirements for the accessories
4.3.1 Accessories that are us
...