oSIST prEN 50059:2021

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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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
3

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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
...