oSIST prEN 50059:2021
(Main)Electrostatic hand-held spraying equipment - Safety requirements - Hand-held spraying equipment for non-ignitable coating materials
Electrostatic hand-held spraying equipment - Safety requirements - Hand-held spraying equipment for non-ignitable coating materials
1.1 This document specifies the requirements for hand-held or hand-operated electrostatic spraying equipment for non-ignitable liquid coating materials which
— do not generate an explosive atmosphere inside the spraying area,
— are used to process materials with a conductivity of less than 2 000 µS/cm, and
— operate with direct current having a sinusoidal ripple of not more than 10 % of the rms value.
This document deals with all electrical hazards significant for the electrostatic spraying of non-ignitable liquid coating materials, which could also contain small quantities of added metal particles, if the work is carried out under conditions recommended by the manufacturer.
This document specifies the design-related and test requirements for electrostatic spraying equipment of type A-NL according to of EN 50348:2010, Table 1.
1.2 With regard to all other significant hazards relevant for applicators (e.g. ejection of fluids, mechanical strength, electrical (with the exception of electrostatic) hazards, noise, contact with or inhalation of dangerous substances, ergonomics), the requirements of EN 1953 apply.
1.3 This document also gives details regarding quality assurance systems for electrostatic spraying equipment; see Annex D.
1.4 For electrostatic spraying equipment used in food and pharmaceutical industry, additional requirements could apply.
1.5 This document is not applicable to:
— electrostatic hand-held spraying equipment for non-ignitable coating materials which are manufactured before the date of its publication,
— cleaning of spraying areas, see instruction manual of the spraying booth,
— fire prevention and protection (for instance fire hazards due to other sources; see EN 16985),
— requirements for machinery for the supply and recirculation of coating material under pressure (see EN 12621).
The requirements of EN 12621 apply in terms of specific requirements regarding machinery for the supply and recirculation of coating materials under pressure.
Elektrostatische Handsprüheinrichtungen - Sicherheitsanforderungen - Handsprüheinrichtungen für nichtentzündbare Beschichtungsstoffe
Équipement manuel de projection électrostatique - Exigences de sécurité - Équipement manuel de projection de revêtement inflammable
1.1 Le présent document spécifie les exigences relatives aux équipements portatifs ou manuels de projection électrostatique de produits liquides de revêtement ininflammables qui
— ne génèrent pas d'atmosphère explosive au sein de l'emplacement de projection,
— sont utilisés pour traiter les matériaux ayant une conductivité inférieure à 2 000 µS/cm, et
— fonctionnent en courant continu avec une ondulation sinusoïdale inférieure ou égale à 10 % de la valeur efficace.
Le présent document traite de tous les dangers électriques importants concernant la projection électrostatique de produits liquides de revêtement ininflammables pouvant également comporter de petites quantités de particules de métal supplémentaires, si la tâche est réalisée dans les conditions recommandées par le fabricant.
Le présent document spécifie les exigences relatives à la conception et les exigences d'essai des équipements de projection électrostatique de type A-NL, conformément à l'EN 50348:2010, Tableau 1.
1.2 Les exigences de l'EN 1953 s'appliquent pour tous les autres dangers significatifs concernant les applicateurs (par exemple, éjection de fluides, résistance mécanique, dangers électriques (à l’exception des dangers électrostatiques), bruit, contact avec ou inhalation des substances dangereuses, ergonomie).
1.3 Le présent document fournit également des informations détaillées concernant les systèmes d'assurance qualité des équipements de projection électrostatique, voir l'Annexe D.
1.4 Pour les équipements de projection électrostatique utilisés dans l'industrie alimentaire et dans l'industrie pharmaceutique, des exigences supplémentaires peuvent s'appliquer.
1.5 Le présent document ne s'applique pas:
— aux équipements portatifs de projection électrostatique de revêtement ininflammable fabriqués avant sa date de publication,
— au nettoyage des emplacements de projection, voir le manuel d'instructions de la cabine de projection,
— à la prévention et la protection contre le feu (par exemple, dangers d'incendie dus à d’autres sources; voir l'EN 16985),
— aux exigences relatives aux machines d'alimentation et de circulation de produits de revêtement sous pression (voir l'EN 12621).
Les exigences de l'EN 12621 s'appliquent aux exigences spécifiques concernant les machines d'alimentation et de circulation de produits de revêtement sous pression.
Oprema za ročno elektrostatično brizganje - Varnostne zahteve - Ročna oprema za brizganje nevnetljivih premazov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 50059:2021
01-december-2021
Oprema za ročno elektrostatično brizganje - Varnostne zahteve - Ročna oprema za
brizganje nevnetljivih premazov
Electrostatic hand-held spraying equipment - Safety requirements - Hand-held spraying
equipment for non-ignitable coating materials
Elektrostatische Handsprüheinrichtungen - Sicherheitsanforderungen -
Handsprüheinrichtungen für nichtentzündbare Beschichtungsstoffe
Équipement manuel de projection électrostatique - Exigences de sécurité - Équipement
manuel de projection de revêtement inflammable
Ta slovenski standard je istoveten z: prEN 50059
ICS:
87.100 Oprema za nanašanje Paint coating equipment
premazov
oSIST prEN 50059:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50059:2021
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oSIST prEN 50059:2021
EUROPEAN STANDARD DRAFT
prEN 50059
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2021
ICS 87.100 Will supersede EN 50059:2018 and all of its
amendments and corrigenda (if any)
English Version
Electrostatic hand-held spraying equipment - Safety
requirements - Hand-held spraying equipment for non-ignitable
liquid coating materials
Équipement manuel de projection électrostatique - Elektrostatische Handsprüheinrichtungen -
Exigences de sécurité - Équipement manuel de projection Sicherheitsanforderungen - Handsprüheinrichtungen für
de produits liquides de revêtement ininflammables nichtentzündbare Beschichtungsstoffe
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-12-31.
It has been drawn up by CLC/TC 204.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 70641 Ref. No. prEN 50059 E
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oSIST prEN 50059:2021
prEN 50059:2021 (E)
Contents Page
European foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms, definitions and abbreviations .7
3.1 Terms and definitions .7
3.2 List of abbreviations . 10
4 Electric hazards . 10
5 Requirements for spraying equipment . 11
5.1 Prevention of electric shock . 11
5.1.1 General . 11
5.1.2 Electrical safety. 11
5.1.3 Bonding to earth potential . 11
5.1.4 Cables . 11
5.1.5 Undercutting the limits of electric shock . 11
5.1.6 Limiting parts . 12
5.2 Additional requirements for the applicator . 13
5.2.1 General . 13
5.2.2 Resistance against impact . 13
5.2.3 Resistance against dropping . 13
5.2.4 Reliability . 13
5.2.5 Handle . 13
5.2.6 Trigger . 13
5.3 Additional requirements for the coating material supply system . 13
5.3.1 General . 13
5.3.2 Material supply hoses under high voltage . 13
5.3.3 Other insulating parts . 14
5.3.4 Conductive and dissipative parts . 14
5.4 Additional requirements for the control system . 14
5.4.1 General . 14
5.4.2 IP protection . 14
5.4.3 Interface . 14
5.5 Environment in which the spraying equipment is used . 14
5.5.1 General . 14
5.5.2 Bonding to earth potential . 14
5.5.3 Use with dissipative floors . 14
6 Tests (type tests) . 15
6.1 Test of prevention of electric shock . 15
6.1.1 General . 15
6.1.2 Test of electrical safety . 15
6.1.3 Test of bonding to earth potential . 15
6.1.4 Test of cables . 15
6.1.5 Undercutting the limits of electric shock . 15
6.1.6 Test of limiting parts . 15
6.2 Test of additional requirements for the applicator . 15
6.2.1 General . 15
6.2.2 Impact test . 16
6.2.3 Drop test . 16
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6.2.4 Test of reliability . 16
6.2.5 Test of the handle . 16
6.2.6 Test of trigger . 16
6.3 Test of additional requirements for the material supply system . 16
6.3.1 General . 16
6.3.2 Test of the material supply hose under high voltage . 16
6.3.3 Test of other insulating parts . 17
6.3.4 Test of conductive and dissipative parts . 17
6.4 Test of additional requirements for the control system . 17
6.4.1 General . 17
6.4.2 Test of the degree of protection . 17
6.4.3 Interface . 17
6.5 Test of requirements on the environment . 17
6.5.1 General . 17
6.5.2 Test of bonding to earth potential . 17
6.5.3 Verification of use with dissipative floors . 17
7 Information for use . 17
7.1 General . 17
7.2 Instruction manual . 18
7.2.1 General . 18
7.2.2 Information on installation . 18
7.2.3 Information on operation . 18
7.2.4 Cleaning, maintenance, and corrective maintenance . 19
7.2.5 Periodic inspections . 19
7.3 Marking of spraying equipment and controller . 19
7.3.1 Marking of applicators . 19
7.3.2 Marking of the control system . 19
7.3.3 Multiple marking of the control system . 20
Annex A (normative) Compliance with area I for spraying equipment including parts of the
coating material supply system . 21
Annex B (informative) Example for discharge measurement . 27
Annex C (informative) Ignitability of coating materials . 29
Bibliography . 32
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prEN 50059:2021 (E)
European foreword
This document (prEN 50059:2021) has been prepared by Technical Committee CLC/TC 204 “Safety of
electrostatic painting and finishing equipment”, the secretariat of which is held by DKE.
This document is currently submitted to the 2nd Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document will supersede EN 50059:2018 and all of its amendments and corrigenda (if any).
prEN 50059:2021 includes the following significant technical changes with respect to EN 50059:2018:
— new structure of the entire document,
— update of Clause 2,
— complete revision of Clauses 1, 3 to 7,
— revision of Annex A (normative).
This document has been prepared under a Standardization Request given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s)
/ Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part of this
document.
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Introduction
During the electrostatic coating process, the non-ignitable liquid coating material is transported to a spraying
device where it is atomized by mechanical forces and/or by the influence of an electric field. The generated
spray cloud is charged by high voltage of some 10 kV, is attracted by and is applied to the earthed workpiece.
Spray clouds which are not applied to the workpiece (overspray) are removed by a suction device or by other
means.
The coating material is cured at room temperature or by heating.
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1 Scope
1.1 This document specifies the requirements for hand-held or hand-operated electrostatic spraying
equipment for non-ignitable liquid coating materials which
— do not generate an explosive atmosphere inside the spraying area,
— are used to process coating materials with a conductivity of the complete system up to 2 000 µS/cm,
— operate with direct current having a d.c. sinusoidal ripple of not more than 10 % of the r.m.s. value and
— are used within a temperature range from 5 °C to 40 °C.
1.2 This document specifies
— requirements for the environment where spraying equipment is used,
— requirements for an interface to machinery according to EN 16985:2018,
— additional requirements for machinery according to prEN 12621:2021 and prEN 1953:2021.
1.3 This document also specifies requirements for a safe operation of electrostatic spraying equipment,
including the electrical installation. The requirements consider both the processing of coating materials and the
cleaning and purge processes.
1.4 For electrostatic spraying equipment used in food and pharmaceutical industry, additional requirements
could apply.
1.5 This document is not applicable to
— electrostatic hand-held spraying equipment for ignitable materials, see EN 50050:2013, parts 1 to 3;
— cleaning systems for spraying devices;
— quality assurance systems for electrostatic spraying equipment (see EN ISO/IEC 80079-34:2020,
Annex ZB 11).
1.6 This document is not applicable to equipment manufactured before the date of its publication as European
Standard.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references, the
latest edition of the referenced document (including any amendments) applies.
EN 1149-5:2018, Protective clothing - Electrostatic properties - Part 5: Material performance and design
requirements
prEN 1953:2021, Application equipment for coating materials — Safety requirements
prEN 12621:2021, Machinery for supply and circulation of liquid coating materials — Safety requirements
EN 16985:2018, Spray booths for organic coating material - Safety requirements
EN 50050-1:2013, Electrostatic hand-held spraying equipment - Safety requirements - Part 1: Hand-held
spraying equipment for ignitable liquid coating materials
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EN 50050-2:2013, Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held
spraying equipment for ignitable coating powder
EN 50050-3:2013, Electrostatic hand-held spraying equipment - Safety requirements - Part 3: Hand-held
spraying equipment for ignitable flock
prEN 50176:2021, Automatic electrostatic application systems for ignitable coating materials - Safety
requirements
1
EN 50177:2009 , Stationary electrostatic application equipment for ignitable coating powders - Safety
requirements
EN 50223:2015, Stationary electrostatic application equipment for non-ignitable liquid coating material - Safety
requirements
EN 50348:2010, Stationary electrostatic application equipment for non-ignitable liquid coating material - Safety
requirements
EN 60079-7:2015, Explosive atmospheres - Part 7: Equipment protection by increased safety "e"
(IEC 60079-7:2015)
EN 60204-1:2018, Safety of machinery - Electrical equipment of machines - Part 1: General requirements
(IEC 60204-1:2016, modified)
2
EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
3
EN 61340-4-1:2004 , Electrostatics - Part 4-1: Standard test methods for specific applications - Electrical
resistance of floor coverings and installed floors (IEC 61340-4-1:2003)
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk reduction
(ISO 12100:2010)
EN ISO 13849-1:2015, Safety of machinery - Safety-related parts of control systems - Part 1: General principles
for design (ISO 13849-1:2015)
EN ISO 20344:2011, Personal protective equipment - Test methods for footwear (ISO 20344:2011)
4
IEC/TS 60479-1:2005 , Effects of current on human beings and livestock — Part 1: General aspects
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
1
As impacted by EN 50177:2009/A1:2012.
2
As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
3
As impacted by EN 61340-4-1:2004/A1:2015.
4
As impacted by IEC/TS 60479-1:2005/Corrigendum October 2006.
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— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1
spraying equipment
hand-held or hand-operated equipment for electrostatic coating processing coating materials which in general
comprises the following:
— applicator,
— high voltage supply system,
— control system,
— connecting cables, and
— coating material supply system
3.1.2
applicator
device for application of coating material by means of electrostatic charge which in general comprises the
following:
— spraying device,
— high voltage electrode, if applicable,
— high voltage supply system (if integrated into the applicator),
— housing,
— exchangeable attachment parts and
— battery unit (integrated fixedly, or attached), if applicable
3.1.3
spraying device
device with outlet opening of coating material for atomising, high-voltage electrode for charging the coating
material and, if applicable, supplying atomising air and shaping air
Note 1 to entry: Typical designs are nozzles or rotating discs, or bell-shaped devices.
3.1.4
high voltage supply system
system which in general comprises the following:
— low-voltage section with devices for switching on and off the spraying equipment and for adjustment,
control, regulation, limitation and monitoring of current and voltage, as well as the required connecting
cables;
— high-voltage generator;
— high-voltage switching device;
— high-voltage cable;
— high-voltage plug-and-socket connector
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3.1.5
control system
device generally having the following functions for adjustment, control, regulation, limitation and monitoring of,
for instance, the coating material supply and the control air
Note 1 to entry: A combination of the control system and the high voltage supply system according to 3.1.4 is possible.
3.1.6
connecting cable
electric cable connected to the applicator or charging device for coating material
3.1.7
high voltage electrode
conductive part in the form of a needle or a solid part, which is under high voltage and serves for direct or
indirect charging of the coating material
3.1.8
coating material supply system
system for supplying the applicator with coating material which in general comprises the following:
— pressurized or depressurised containers,
— dosing and mixing devices for coating materials,
— supply lines for coating materials, and
— charging device for liquid coating material
3.1.9
earthing system
system for earthing the spraying equipment permanently
3.1.10
spraying area
area, closed or not, in which the coating material is applied to the workpiece by the spraying equipment
3.1.11
hazardous discharge
discharge which generates the hazard of electric shock
3.1.12
workpiece
article to which the coating material is applied
3.1.13
non-ignitable liquid coating material
substances, especially liquids and varnishes, which cannot be ignited in sprayed state
Note 1 to entry: A formula for the estimation of ignitability on the basis of the composition of the liquid coating material
is given in Annex C.
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3.1.14
protective 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 a hazardous discharge
Note 1 to entry: See EN ISO 20344:2011.
Note 2 to entry: A required electric insulating resistance to prevent electric shocks is not contradictory to this definition.
3.1.15
protective clothing
clothing that have a resistance to earth which is low enough to prevent the build-up of electrostatic charges
capable to produce a hazardous discharge
Note 1 to entry: See EN 1149-5:2018.
Note 2 to entry: A required electric insulating resistance to prevent electric shocks is not contradictory to this definition.
3.1.16
dissipative floor
floor that has a resistance to earth which is low enough to prevent the build-up of electrostatic charges capable
to produce a hazardous discharge
3.1.17
exchangeable attachment parts
nozzles, bells, extensions, angular pieces, electron and ion absorber
3.1.18
periodic inspection
inspection of the spraying equipment to be carried out at regular intervals
3.2 List of abbreviations
U maximum outlet high voltage
max
I maximum short-circuit current
max
I body current (RMS) flowing from the hand to both feet
B rms
I peak current value of a discharge caused by the spraying equipment
C (p)
U peak voltage value of a discharge measured from the oscilloscope
C (p)
t pulse duration in which the peak current value I is dropped to 5 % of its value
i C (p)
R resistance of the shunt, e.g. 0,100 Ω to 0,500 Ω
Shunt
F factor of the current transformer in V/A
CT
F factor of the attenuator, e.g. 10:1
AT
4 Electric hazards
Electric shock (by direct or indirect contact) may be generated, for instance, by contact with:
— live parts which are not insulated for operational reasons,
— conductive parts which are not under hazardous voltage during normal operation, but in case of failure,
— insulated live parts whose insulation is insufficient or has been damaged due to internal or external
influences.
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Inadequate earthing may occur, for instance, due to:
— faulty connections to the protective earthing system,
— a too high resistance to earth (e.g. due to contamination by coating materials).
Electrical hazards may occur, for instance, if hazardous malfunctions (e.g. shortcut of electronic safety circuits,
of access guards to hazardous areas or of warning devices) occur due to interferences of the high-voltage
equipment and the components of control and safety systems.
Hazardous electrostatic discharges may be generated, for instance, by non-earthed conductive components or
by large insulating surfaces, especially if they are backed with conductive material.
5 Requirements for spraying equipment
5.1 Prevention of electric shock
5.1.1 General
The values of the maximum high voltage and the maximum short-circuit current of the spraying equipment shall
be defined by the manufacturer.
Insulating materials of parts under high voltage shall be designed in compliance with the conditions for operation,
transport, and storage.
5.1.2 Electrical safety
The electrical equipment of the spraying equipment not related to the high voltage supply system shall comply
with EN 60204-1:2018.
5.1.3 Bonding to earth potential
Spraying equipment shall have an earth connection. The c
...
SLOVENSKI STANDARD
oSIST prEN 50059:2020
01-julij-2020
Oprema za ročno elektrostatično brizganje - Varnostne zahteve - Ročna oprema za
brizganje nevnetljivih premazov
Electrostatic hand-held spraying equipment - Safety requirements - Hand-held spraying
equipment for non-ignitable coating materials
Elektrostatische Handsprüheinrichtungen - Sicherheitsanforderungen -
Handsprüheinrichtungen für nichtentzündbare Beschichtungsstoffe
Équipement manuel de projection électrostatique - Exigences de sécurité - Équipement
manuel de projection de revêtement inflammable
Ta slovenski standard je istoveten z: prEN 50059
ICS:
87.100 Oprema za nanašanje Paint coating equipment
premazov
oSIST prEN 50059:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50059:2020
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oSIST prEN 50059:2020
EUROPEAN STANDARD DRAFT
prEN 50059
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 87.100 Will supersede EN 50059:2018 and all of its
amendments and corrigenda (if any)
English Version
Electrostatic hand-held spraying equipment - Safety
requirements - Hand-held spraying equipment for non-ignitable
coating materials
Équipement manuel de projection électrostatique - Elektrostatische Handsprüheinrichtungen -
Exigences de sécurité - Équipement manuel de projection Sicherheitsanforderungen - Handsprüheinrichtungen für
de revêtement inflammable nichtentzündbare Beschichtungsstoffe
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2020-07-31.
It has been drawn up by CLC/TC 204.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 70641 Ref. No. prEN 50059 E
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prEN 50059:2020 (E)
Contents Page
European foreword .4
0 Introduction .5
0.1 Process .5
0.2 Fire hazards .5
0.3 Electric hazards .5
1 Scope .6
2 Normative references .6
3 Terms, definitions and symbols .7
3.1 Terms and definitions .7
3.2 Symbols .9
4 Requirements for hand-held spraying equipment for non-ignitable liquid coating
materials . 10
4.1 General requirements . 10
4.2 Requirements for the accessories . 12
5 Tests . 13
5.1 General . 13
5.2 General tests . 13
5.2.1 Test of earth connections . 13
5.2.2 Resistance test . 13
5.2.3 Test of contact surface area . 13
5.2.4 Test of OFF-position . 13
5.3 Conditioning test . 13
5.3.1 Cable pull test and hose pull test . 13
5.3.2 Impact test . 13
5.3.3 Drop test . 14
5.4 Tests for electrical safety . 14
5.4.1 Measurement of the parameters high voltage and short-circuit current . 14
5.4.2 Voltage test . 14
5.4.3 Test of the degree of protection of applicators . 14
5.5 Test of the peak current values of discharges I with their associated pulse durations
C (p)
t . 14
i
5.6 Tests of the accessories . 14
5.6.1 Test of the degree of protection . 14
5.6.2 Test of the coating material supply system . 15
6 Information for use . 15
6.1 General . 15
6.2 Instruction manual . 15
6.2.1 General . 15
6.2.2 Cleaning, maintenance and repair . 15
6.2.3 Test intervals of repeated tests . 16
Table 1 — Test intervals . 16
6.2.4 Additional information . 16
6.3 Marking of electrostatic hand-held spraying equipment and associated control devices . 17
6.3.1 Marking of applicators . 17
6.3.2 Marking of the associated control devices . 17
6.3.3 Reduced marking . 18
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Annex A (normative) Measurement of a discharge with the peak current value I and the
C (p)
pulse duration t (type test) . 19
i
Figure A.1.1 - Equivalent circuit diagram with shunt and oscilloscope . 20
Figure A.1.2 - Equivalent circuit diagram with current transformer and oscilloscope . 21
Figure A.2 — Schematic discharge curve . 22
Annex B (informative) Example for discharge measurement . 24
Figure B.1 — Discharge plot . 24
Annex C (informative) Ignitability of coating materials . 26
C.1 General . 26
C.2 Non-ignitable coating materials . 26
C.3 Ignitable coating materials . 26
Annex D (informative) Quality assurance systems for electrostatic spraying equipment . 27
D.1 General . 27
D.2 Electrical assembly . 27
D.3 Mechanical assembly . 28
D.4 Tests . 28
Annex ZZ (informative) Relationship between this European standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 29
Table ZZ.1 — Correspondence between this European standard and Annex I of Directive
2006/42/EC . 29
Bibliography . 30
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European foreword
This document (prEN 50059:2020) has been prepared by Technical Committee CEN-CENELEC/TC 204
“Safety of electrostatic painting and finishing equipment”, the secretariat of which is held by DIN.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document will supersede EN 50059:2018 and all of its amendments and corrigenda (if any).
prEN 50059:2020 includes the following significant technical changes with respect to EN 50059:2018:
— modification of 3.2 Symbols,
— update of 1.5,
— update of 2 Normative references,
— update of 6.2.1 General,
— correction and modification of Annex A (normative),
— modification of Annex B (informative),
— modification of Annex C (informative),
— update of Bibliography.
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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0 Introduction
0.1 Process
During the electrostatic coating process the non-ignitable liquid coating material is transported from a reservoir
to an applicator where it is atomised by mechanical forces and by the influence of an electric field. The coating
material is charged by high voltage of some 10 kV and a spray cloud is generated. The charged droplets of the
coating materials are attracted by and applied to the earthed workpiece.
Droplets of the coating material, which are not applied to the workpiece (overspray) are removed by a suction
device or by other means.
After the coating process, the coated workpieces are introduced into a dryer or oven where a dry film of coating
material is generated.
0.2 Fire hazards
0.2.1 Fire hazards can be caused by deposits of coating materials inside the spray booth, exhaust air ducts,
the recovery system for coating materials, and filters. During operation, malfunctions or electrical faults could
cause ignition of these residues. The propagation of the fire also leads to hazards in adjacent areas.
0.2.2 Particular attention should be paid to the prevention of electrostatic charges on different surfaces, which
are in the vicinity of the spray cloud. This could apply both to workpieces during the coating process or the
reciprocating devices and the mounting parts of the spraying system, etc.
0.2.3 When spraying non-ignitable coating material, the formation of an explosive atmosphere is not likely to
occur. Electrostatic application equipment for ignitable coating materials are covered by EN 50050-1,
EN 50050-2 and EN 50050-3.
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,
— charged passive parts with inadequate earthing.
0.3.2 Inadequate earthing could occur, for instance, due to:
— faulty connections to the protective earthing system,
— a too high resistance to earth (e.g. contamination by coating materials).
0.3.3 Hazards could occur, for instance, if hazardous malfunctions (e.g. shortcut of electronic safety circuits)
occur due to interferences of the electrostatic 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.
0.3.5 Ventricular fibrillation is the primary risk of electric shock. The undercut of the current/time limit and the
fibrillation limit are proven by current and time measurement. In this document, I is used as a measure for
(t)
falling below the current/time limit and the fibrillation limit. It is comparable to the amount of current It or the
2
specific fibrillation energy It in accordance with IEC 60479-1 and IEC 60479-2. A power limit as given in the
standards EN 50176, EN 50177, EN 50223 and EN 50348 is not applicable in this document due to the
characteristics of the equipment and the resulting hazard of electric current.
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1 Scope
1.1 This document specifies the requirements for hand-held or hand-operated electrostatic spraying
equipment for non-ignitable liquid coating materials which
— do not generate an explosive atmosphere inside the spraying area,
— are used to process materials with a conductivity of less than 2 000 µS/cm, and
— operate with direct current having a sinusoidal ripple of not more than 10 % of the rms value.
This document deals with all electrical hazards significant for the electrostatic spraying of non-ignitable liquid
coating materials, which could also contain small quantities of added metal particles, if the work is carried out
under conditions recommended by the manufacturer.
This document specifies the design-related and test requirements for electrostatic spraying equipment of type
A-NL according to of EN 50348:2010, Table 1.
1.2 With regard to all other significant hazards relevant for applicators (e.g. ejection of fluids, mechanical
strength, electrical (with the exception of electrostatic) hazards, noise, contact with or inhalation of dangerous
substances, ergonomics), the requirements of EN 1953 apply.
1.3 This document also gives details regarding quality assurance systems for electrostatic spraying
equipment; see Annex D.
1.4 For electrostatic spraying equipment used in food and pharmaceutical industry, additional requirements
could apply.
1.5 This document is not applicable to:
— electrostatic hand-held spraying equipment for non-ignitable coating materials which are manufactured
before the date of its publication,
— cleaning of spraying areas, see instruction manual of the spraying booth,
— fire prevention and protection (for instance fire hazards due to other sources; see EN 16985),
— requirements for machinery for the supply and recirculation of coating material under pressure (see
EN 12621).
The requirements of EN 12621 apply in terms of specific requirements regarding machinery for the supply and
recirculation of coating materials under pressure.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. 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: Material performance and design
requirements
EN 1953, Atomising and spraying equipment for coating materials — Safety requirements
EN 16985, Spray booths for organic coating material — Safety requirements
EN 60079-7:2015, Explosive atmospheres — Part 7: Equipment protection by increased safety “e”
(IEC 60079-7:2015)
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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 ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction
(ISO 12100)
EN ISO 20344, Personal protective equipment — Test methods for footwear (ISO 20344)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
hand-held spraying equipment
hand-held or hand-operated equipment for electrostatic coating using non-ignitable liquid coating materials,
generally comprising the following parts:
— applicator,
— coating material supply system,
— control device,
— high voltage supply system, and
— connecting cable
3.1.2
connecting cable
electric cable connected to the applicator or charging device for liquid coating material
3.1.3
earthing system
system for earthing the electrostatic hand-held spraying equipment permanently
3.1.4
spraying device
outlet opening for the coating material of the applicator
Note 1 to entry: Spraying devices may be constructed as nozzle or bell types.
3.1.5
high voltage electrode
conductive part, which is at a high voltage and serves to directly or indirectly charge the coating material
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3.1.6
control device
device generally having the following functions of controlling, for instance, the coating material supply system
and the control air
Note 1 to entry: A combination of the control device and the high voltage supply according to 3.1.8 is possible.
3.1.7
applicator
equipment for application of coating material that comprises the following parts in general:
— high voltage electrode, if applicable,
— high voltage supply (as far as integrated into the applicator),
— housing,
— spraying device,
— exchangeable attachment parts (e.g. nozzles, extensions, angular pieces, etc.), and
— battery unit (integrated fixedly, or attached), if applicable
3.1.8
high voltage supply for applicators
high voltage supply comprising the following parts in general:
— 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
3.1.9
spraying area
area, closed or not, in which the coating material is applied to the workpiece by the hand-held spraying
equipment
3.1.10
dangerous discharge
discharge which generates the hazard of electric shock
3.1.11
coating material supply system
coating material supply system that comprises the following in general:
— reservoir for coating materials,
— dosing and mixing devices for coating materials,
— supply lines for coating materials,
— devices for drive, control and monitoring supply of coating materials, and
— charging device for liquid coating material
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3.1.12
workpiece
article to which the coating material is applied
3.1.13
non-ignitable liquid coating material
liquids and varnishes which cannot be ignited by an effective ignition source during spraying
Note 1 to entry: A formula for the estimation of ignitability on the basis of the composition of the liquid coating material
is given in Annex C.
3.1.14
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 of producing a dangerous 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.
3.1.15
antistatic clothes
clothes that have a resistance to earth, which is low enough to prevent the build-up of electrostatic charges
capable of producing a dangerous 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.
3.1.16
antistatic floor
floor that has a resistance to earth, which is low enough to prevent the build-up of electrostatic charges capable
of producing a dangerous discharge
3.1.17
accessory
device, component or other equipment, except for 3.1.7 of this document
3.1.18
repeated test
test of the hand-held spraying equipment, including all accessories, to be carried out at regular intervals
3.2 Symbols
U maximum outlet voltage of the high-voltage generator
max
I maximum outlet current of the high-voltage generator
max
I body current (RMS) flowing from the hand to both feet
B rms
I peak current value of a discharge caused by the hand-held spraying equipment
C (p)
U
peak voltage value of a discharge measured from the oscilloscope
C (p)
t time period, in which the peak current value I is dropped to 5 % of its value
i C (p)
R resistance of the shunt (0,100 Ω to 0,500 Ω)
Shunt
F factor of the current transformer in V/A
CT
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F factor of the attenuator ≥ 10:1
AT
4 Requirements for hand-held spraying equipment for non-ignitable liquid coating
materials
4.1 General requirements
4.1.1 Hand-held spraying equipment shall be designed and constructed that both
— in case of long-time contact (>1 s) of live parts and charged passive parts, the short-circuit current flowing
through the user does not exceed the maximum of 30 mA DC (see 5.4.1.2), and
— in case of discharge times of less than 10 ms from live parts and charged passive parts the body current
with the value I of a discharge does not exceed the boundary line C of Figure 1 (see 5.5, 5.6.2 and
B rms 1
Annex A and Annex B).
NOTE 1 A discharge in the timeframe between 10 ms and 1 s does not occur in this type of equipment.
Figure 1 — Pulse duration — body current, ventricular fibrillation risk
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The curves indicate the probability of ventricular fibrillation risk for current flowing through the body from the left
hand to both feet.
Below C : no ventricular fibrillation (safety limit)
1
Above C up to C : low risk of ventricular fibrillation (up to 5 % of probability);
1 2
Above C up to C : average risk of ventricular fibrillation (up to 50 % of probability);
2 3
Above C : high risk of ventricular fibrillation (more than 50 % probability).
3
NOTE 2 Findings from electrical accidents lead to the conclusion that the risk of ventricular fibrillation generally exists
particularly with long-time longitudinal flow (hand to feet). When using electrostatic hand-held spraying equipment, a less
dangerous cross flow (hand to hand) can be assumed. This is considered in the calculation of the effective body current
value.
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.
2
4.1.5 The handle of the applicator shall have a contact surface area of conductive material of at least 20 cm .
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
...
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