Vacuum cleaners and dust extractors providing equipment protection level Dc for the collection of combustible dusts - Particular requirements

IEC 62784:2017 covers electrical mobile motor-operated vacuum cleaners Equipment Protection Level (EPL) Dc.
This includes dust extractors, for wet suction or dry suction, intended for commercial indoor use with or without attachments, to collect combustible dust in an explosive dust atmosphere.
The requirements for the construction and testing covered by this document are applied in addition to the requirements for commercial and industrial vacuum cleaners in IEC 60335-2-69.
This document supplements and modifies the requirements of IEC 60079-0. Whenever a requirement of this standard is in conflict with a requirement of IEC 60079-0 the requirement of this standard will take precedence.
The following power systems are covered:
- mains powered motors up to a rated voltage of 250 V for single-phase appliances and 480 V for other appliances.
This document does not cover specific hazards associated with extreme ambient temperatures (less than –20 °C or higher than 40 °C) unless otherwise marked by the manufacturer as given in IEC 60079-0. The temperatures shall not exceed the temperature range of –20 °C to +60 °C.
This document does not cover motorized cleaning heads for which additional requirements are under consideration.
This document does not apply to:
- back-pack vacuum cleaners;
- vacuum cleaners with a traction drive;
- vacuum cleaners and water-suction cleaning appliances for household use (IEC 60335-2-2);
- floor treatment machines for commercial use (IEC 60335-2-67, IEC 60335-2-72);
- spray extraction machines for commercial use (IEC 60335-2-68);
- hand-held mains-operated electrical garden blowers, vacuums and blower vacuums (IEC 60335-2-100);
- hand-held and transportable motor-operated electric tools (IEC 62841 series);
- appliances for medical purposes (IEC 60601-1);
- machines designed for use in corrosive environments;
- machines designed for picking up flammable liquids;
- machines designed for use in explosive environments due to the presence of explosive substances or pyrotechnical products, or unstable chemical substances.

Aspirateurs et extracteurs de poussières procurant un niveau de protection du matériel Dc, pour la collecte des poussières combustibles - Exigences particulières

IEC 62784:2017 couvre les aspirateurs à moteur électrique transportables, procurant un niveau de protection des matériels Dc.
Il couvre ainsi les extracteurs de poussières, pour l’aspiration de liquides ou de poussières, destinés à un usage commercial à l’intérieur, avec ou sans accessoires, pour la collecte des poussières combustibles dans une atmosphère explosive contenant des poussières.
Les exigences relatives à la construction et aux essais du présent document sont appliquées en complément des exigences relatives aux aspirateurs à usage industriel et commercial donnés par l'IEC 60335-2-69.
Le présent document complète et modifie les exigences de l’IEC 60079-0. Lorsqu’une exigence de la présente norme est en contradiction avec une exigence de l’IEC 60079-0, c’est l’exigence de la présente norme qui prévaut.
Les systèmes d’alimentation suivants sont couverts: moteurs alimentés par le secteur jusqu’à une tension assignée de 250 V pour les appareils monophasés et 480 V pour les autres appareils.
Le présent document ne couvre pas les dangers spécifiques associés aux températures ambiantes extrêmes (inférieures à –20 °C ou supérieures à 40 °C), sauf indication contraire fournie par le marquage apposé par le fabricant, conformément à l’IEC 60079-0. La température ne doit pas dépasser la plage de températures comprise entre –20 °C et +60 °C.
Le présent document ne couvre pas les têtes de nettoyage à moteur pour lesquelles des exigences complémentaires sont à l’étude.
Le présent document ne s’applique pas:
- aux aspirateurs dorsaux;
- aspirateurs autotractés;
- aspirateurs et appareils de nettoyage à aspiration d’eau, à usage domestique (IEC 60335-2-2);
- machines de traitement des sols, à usage commercial (IEC 60335-2-67, IEC 60335-2-72);
- machines de nettoyage par pulvérisation et aspiration, à usage commercial (IEC 60335-2-68);
- souffleurs, aspirateurs et aspiro-souffleurs portatifs pour le jardin, alimentés par le secteur (IEC 60335-2-100);
- outils électroportatifs à moteur et outils portables (série IEC 62841);
- appareils destinés à un usage médical (IEC 60601-1);
- machines conçues pour être utilisées dans des environnements corrosifs;
- machines conçues pour la collecte des liquides inflammables;
- machines conçues pour être utilisées dans des environnements explosifs en raison de la présence de substances explosives, ou de produits pyrotechniques ou de substances chimiques instables.
Mots clés: aspirateurs, extracteurs de poussières, poussières combustibles

General Information

Status
Published
Publication Date
21-May-2017
Current Stage
PPUB - Publication issued
Start Date
22-May-2017
Completion Date
22-May-2017
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IEC 62784
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Vacuum cleaners and dust extractors providing equipment protection level Dc
for the collection of combustible dusts – Particular requirements
Aspirateurs et extracteurs de poussières procurant un niveau de protection du
matériel Dc, pour la collecte des poussières combustibles – Exigences
particulières
IEC 62784:2017-05(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62784
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Vacuum cleaners and dust extractors providing equipment protection level Dc
for the collection of combustible dusts – Particular requirements
Aspirateurs et extracteurs de poussières procurant un niveau de protection du
matériel Dc, pour la collecte des poussières combustibles – Exigences
particulières
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.080 ISBN 978-2-8322-4346-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62784:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 7

4 Constructional requirements ............................................................................................ 8

4.1 General ................................................................................................................... 8

4.2 General protection requirements ............................................................................. 8

4.3 Classification according filter construction .............................................................. 8

4.4 Supply connection and external flexible cords ......................................................... 8

4.5 Connection facilities and termination compartments ................................................ 8

5 Type verification and type tests ....................................................................................... 9

6 Routine tests ................................................................................................................... 9

7 Marking and instructions .................................................................................................. 9

Bibliography .......................................................................................................................... 10

---------------------- Page: 4 ----------------------
IEC 62784:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VACUUM CLEANERS AND DUST EXTRACTORS PROVIDING
EQUIPMENT PROTECTION LEVEL Dc FOR THE COLLECTION
OF COMBUSTIBLE DUSTS – PARTICULAR REQUIREMENTS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International standard IEC 62784 has been prepared by subcommittee 61J: Electrical motor-

operated cleaning appliances for commercial use, of IEC technical committee 61: Safety of

household and similar electrical appliances.

This standard cancels and replaces Annex CC of IEC 60335-2-69, on which this standard is

based.
The text of this standard is based on the following documents:
FDIS Report on voting
61J/660/FDIS 61J/667/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 5 ----------------------
– 4 – IEC 62784:2017 © IEC 2017

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 62784:2017 © IEC 2017 – 5 –
INTRODUCTION

This document recognizes the internationally accepted level of protection against hazards

such as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the manufacturer's instructions. It also covers abnormal

situations that can be expected in practice and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

This document takes into account the requirements of IEC 60364 as far as possible so that

there is compatibility with the wiring rules when the appliance is connected to the supply

mains. However, national wiring rules may differ.

An appliance employing materials or having forms of construction differing from those detailed

in the requirements of this standard may be examined and tested according to the intent of

the requirements and, if found to be substantially equivalent, may be considered to comply

with the standard.

IEC 62784 contains the result of the work of IEC SC61J JWG1. The joint working group was

established in April 2009 to prepare, or ensure the coordination of (within SC61J)

international standards and specifications for vacuum cleaners and dust extractors in

collaboration with TC31, intended for the collection of dusts which present an explosion risk.

This document for "vacuum cleaners and dust extractors providing equipment protection level

Dc for the collection of combustible dusts" reflects the final agreement of JWG1.

---------------------- Page: 7 ----------------------
– 6 – IEC 62784:2017 © IEC 2017
VACUUM CLEANERS AND DUST EXTRACTORS PROVIDING
EQUIPMENT PROTECTION LEVEL Dc FOR THE COLLECTION
OF COMBUSTIBLE DUSTS – PARTICULAR REQUIREMENTS
1 Scope

This International Standard covers electrical mobile motor-operated vacuum cleaners

Equipment Protection Level (EPL) Dc.

This includes dust extractors, for wet suction or dry suction, intended for commercial indoor

use with or without attachments, to collect combustible dust in an explosive dust atmosphere.

The requirements for the construction and testing covered by this document are applied in

addition to the requirements for commercial and industrial vacuum cleaners in
IEC 60335-2-69.

This document supplements and modifies the requirements of IEC 60079-0. Whenever a

requirement of this standard is in conflict with a requirement of IEC 60079-0 the requirement

of this standard will take precedence.
The following power systems are covered:

– mains powered motors up to a rated voltage of 250 V for single-phase appliances and

480 V for other appliances.
This document does not cover specific hazards associated with extreme ambient

temperatures (less than –20 °C or higher than 40 °C) unless otherwise marked by the

manufacturer as given in IEC 60079-0. The temperatures shall not exceed the temperature

range of –20 °C to +60 °C.

This document does not cover motorized cleaning heads for which additional requirements

are under consideration.
This document does not apply to
– back-pack vacuum cleaners;
– vacuum cleaners with a traction drive;
– vacuum cleaners and water-suction cleaning appliances for household use
(IEC 60335-2-2);
– floor treatment machines for commercial use (IEC 60335-2-67, IEC 60335-2-72);
– spray extraction machines for commercial use (IEC 60335-2-68);
– hand-held mains-operated electrical garden blowers, vacuums and blower vacuums
(IEC 60335-2-100);
– hand-held and transportable motor-operated electric tools (IEC 62841 series);
– appliances for medical purposes (IEC 60601-1);
– machines designed for use in corrosive environments;
– machines designed for picking up flammable liquids;

– machines designed for use in explosive environments due to the presence of explosive

substances or pyrotechnical products, or unstable chemical substances.
---------------------- Page: 8 ----------------------
IEC 62784:2017 © IEC 2017 – 7 –
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.

IEC 60079-0:2011, Explosive atmospheres – Part 0: Equipment – General requirements

IEC 60079-31, Explosive atmospheres – Part 31: Equipment dust ignition protection by

enclosure "t"

IEC 60335-2-69, Household and similar electrical appliances – Safety – Part 2-69: Particular

requirements for wet and dry vacuum cleaners, including power brush, for commercial use

3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60079-0,

IEC 60079-31, IEC 60335-2-69 and the following 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
combustible dust

finely divided solid particles, 500 µm or less in nominal size, which may form explosive

mixtures with air at standard atmospheric pressure and temperatures
Note 1 to entry: This includes dust and grit as defined in ISO 4225.

Note 2 to entry: The term solid particles is intended to address particles in the solid phase and not the gaseous or

liquid phase, but does not preclude a hollow particle.
3.2
explosive dust atmosphere

mixture with air, under atmospheric conditions, of flammable substances in the form of dust,

fibres or flyings which, after ignition, permits self-sustaining propagation

Note 1 to entry: Minimum ignition energy values for common dusts can be found in IEC 60335-2-69.

[SOURCE: IEC 60050-426:2008, 426-01-08, modified – The note to entry has been added]

3.3
mobile machine
transportable equipment
machine that is capable of being moved from one location to another

Note 1 to entry: This includes portable and hand-held appliances, and excludes fixed and stationary appliances.

[SOURCE: IEC 60050-151:2001, 151-16-45, modified – "Machine" has been added and

"generally by using vehicles" has been deleted. The note to entry has been added]

3.4
electrostatic earthing
connection to earth with a maximum resistance of 1 MΩ
---------------------- Page: 9 ----------------------
– 8 – IEC 62784:2017 © IEC 2017
3.5
conductive part
part made of materials with a specific resistance of not more than 10 kΩ
3.6
electrostatic dissipative

having an intermediate resistivity (100 kΩm to < 1 GΩm) or resistance (10 kΩ to < 100 GΩ)

that lies between the conductive and insulating ranges

Note 1 to entry: Dissipative materials or objects are neither conductive nor insulating but, like conductive items,

safely limit contact charging and/or dissipate even the maximum charging currents associated with their designed

application when in contact with earth.
4 Constructional requirements
4.1 General

Vacuum cleaners covered by this document minimize the risk of ignition during normal

operation (intended use). By fulfilling the requirements specified in this standard, any misuse

which can reasonably be anticipated is addressed. The requirements given in this standard

apply to each machine, including all accessories, such as nozzles, hoses, unless otherwise

stated.
4.2 General protection requirements
Vacuum cleaners shall be constructed as follows:

1) The machine already fulfils the requirements for commercial vacuum cleaners of

IEC 60335-2-69.

2) The motor, switch, cord and plug shall comply with the requirements of IEC 60079-31 for

EPL Dc.

3) The following parts of the vacuum cleaner shall be conductive or electrostatic dissipative,

bonded and connected to the earth terminal of the connection facility:
a) impeller;
b) tools;
c) non-metal parts of the machine;
d) hose.

4) Isolated metal parts coming into contact with the dust are not permitted. All metal parts

are bonded and connected to the earth terminal of the connection facility.

5) The suction air through the hose shall be filtered prior to contacting the impeller of the

motor. Flow-through motors are not permitted.

6) Only electrical components of EPL Da can be located inside of the dust collection

containment.
4.3 Classification according filter construction

Vacuum cleaners covered by this standard provide dust classes L, M, or H in accordance with

IEC 60335-2-69.
4.4 Supply connection and external flexible cords

Supply cords and plugs shall comply with IEC 60079-31 for EPL Dc if the connection is

intended to be made within the hazardous area.
4.5 Connection facilities and termination compartments

Terminal compartments for external conductors shall comply with IEC 60079-31 for EPL Dc.

---------------------- Page: 10 ----------------------
IEC 62784:2017 © IEC 2017 – 9 –
5 Type verification and type tests

Compliance with the requirements of this standard is checked by inspection, examination and

tests, as appropriate.
End-to-end hose resistance of the hose assembly shall be less than 1 MΩ.
6 Routine tests

The manufacturer shall also carry out routine tests required by the standards listed in

Clause 2 which were used for the examination and testing of the equipment and are

appropriate for this product group with EPL Dc and are applicable for this product group.

7 Marking and instructions
Marking shall be in accordance with IEC 60079-0.

The symbol provided for the “type of protection used” for the appliance is to be “62784”.

An example for this marking is "Ex 62784 IIIC T135 °C Dc".
---------------------- Page: 11 ----------------------
– 10 – IEC 62784:2017 © IEC 2017
Bibliography
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at

IEC 60335-2-2, Household and similar electrical appliances – Safety – Part 2-2: Particular

requirements for vacuum cleaners and water-suction cleaning appliances

IEC 60335-2-67, Household and similar electrical appliances – Safety – Part 2-67: Particular

requirements for floor treatment machines, for commercial use

IEC 60335-2-68, Household and similar electrical appliances – Safety – Part 2-68: Particular

requirements for spray extraction machines, for commercial use

IEC 60335-2-72, Household and similar electrical appliances – Safety – Part 2-72: Particular

requirements for floor treatment machines with or without traction drive, for commercial use

IEC 60335-2-100, Household and similar electrical appliances – Safety – Part 2-100:

Particular requirements for hand-held mains-operated garden blowers, vacuums and blower

vacuums
IEC 60364 (all parts), Low-voltage electrical installations
IEC 60601-1 (all parts), Medical electrical equipment

IEC 62841 (all parts), Electric motor-operated hand-held tools, transportable tools and lawn

and garden machinery
ISO 4225, Air quality – General aspects – Vocabulary
___________
---------------------- Page: 12 ----------------------
– 12 – IEC 62784:2017 © IEC 2017
SOMMAIRE

AVANT-PROPOS .................................................................................................................. 13

INTRODUCTION ................................................................................................................... 15

1 Domaine d'application ................................................................................................... 16

2 Références normatives .................................................................................................. 17

3 Termes et définitions ..................................................................................................... 17

4 Exigences de construction ............................................................................................. 18

4.1 Généralités ........................................................................................................... 18

4.2 Exigences générales de protection........................................................................ 18

4.3 Classification en fonction de la construction du filtre ............................................. 19

4.4 Raccordement au réseau et câbles souples extérieurs .......................................... 19

4.5 Eléments de raccordement et logements de raccordement .................................... 19

5 Vérification de type et essais de type ............................................................................ 19

6 Essais individuels de série ............................................................................................ 19

7 Marquage et instructions ............................................................................................... 19

Bibliographie ......................................................................................................................... 20

---------------------- Page: 13 ----------------------
IEC 62784:2017 © IEC 2017 – 13 –
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
ASPIRATEURS ET EXTRACTEURS DE POUSSIÈRES PROCURANT
UN NIVEAU DE PROTECTION DU MATÉRIEL Dc, POUR LA COLLECTE
DES POUSSIÈRES COMBUSTIBLES – EXIGENCES PARTICULIÈRES
AVANT-PROPOS

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composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour

objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines

de l'électricité et de l'électronique. A cet effet, l’IEC – entre autres activités – publie des Normes

internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au

public (PAS) et des Guides (ci-après dénommés "Publication(s) de l’IEC"). Leur élaboration est confiée à des

comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les

organisations internationales, gouvernementales et non gouvernementales, en liaison avec l’IEC, participent

également aux travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),

selon des conditions fixées par accord entre les deux organisations.

2) Les décisions ou accords officiels de l’IEC concernant les questions techniques représentent, dans la mesure

du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l’IEC

intéressés sont représentés dans chaque comité d’études.

3) Les Publications de l’IEC se présentent sous la forme de recommandations internationales et sont agréées

comme telles par les Comités nationaux de l’IEC. Tous les efforts raisonnables sont entrepris afin que l’IEC

s'assure de l'exactitude du contenu technique de ses publications; l’IEC ne peut pas être tenue responsable de

l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.

4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de l’IEC s'engagent, dans toute la

mesure possible, à appliquer de façon transparente les Publications de l’IEC dans leurs publications nationales

et régionales. Toutes divergences entre toutes Publications de l’IEC et toutes publications nationales ou

régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.

5) L’IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants

fournissent des services d'évaluation de conformité et, dans certains secteurs, accèdent aux marques de

conformité de l’IEC. L’IEC n'est responsable d'aucun des services effectués par les organismes de certification

indépendants.

6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.

7) Aucune responsabilité ne doit être imputée à l’IEC, à ses administrateurs, employés, auxiliaires ou

mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités

nationaux de l’IEC, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre

dommage de quelque nature que ce soit, directe ou indirecte, ou pour supporter l
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