SIST EN 1710:2006
(Main)Equipment and components intended for use in potentially explosive atmospheres in underground mines
Equipment and components intended for use in potentially explosive atmospheres in underground mines
This European Standard specifies the explosion protection requirements for the construction and marking of equipment that may be an individual item or form an assembly. This includes machinery and components placed on the market by a single supplier for use in mines susceptible to explosive atmospheres of firedamp and/or combustible dust (at atmospheric conditions as defined in EN 1127-2).
NOTE 1 This European Standard deals only with the ignition protection of mining machinery and manufacturers will need to take account of all other relevant EU Directives relating to the construction of machines e.g. the consolidated Machinery Directive 98/37/EC. Additionally, manufacturers will need to take account of any national legislation in the country where they intend to market their equipment.
NOTE 2 Where the flammable gas in the atmosphere is not predominantly methane, reference will need to be made to 4.1 in either EN 60079-0:2004 or EN 13463-1:2001.
NOTE 3 The definition of ‘equipment’ is contained in EN 13463-1. The definition of ‘assembly’ can be found the ATEX guidelines, published by the European Commission.
Equipment complying with the relevant clauses of this European Standard is considered to meet the requirements for equipment of Group I - Category M2.
This European Standard also deals with the prevention of ignitions of explosive atmospheres caused by burning (or smouldering) of combustible material such as fabric fibres, plastic O-rings, rubber seals, lubricating oils or greases used in the construction of the equipment if such items could be an ignition source. For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its plastic cage, plastic seal or lubricating grease. See also 5.2.4 of EN 13463-1:2001.
Geräte und Komponenten für den Einsatz in schlagwettergefährdeten Bereichen von untertägigen Bergwerken
Diese Europäische Norm legt die explosionsschutztechnischen Anforderungen an den Bau und die Kennzeichnung von Geräten fest, die separate Gegenstände sein können oder Baugruppen bilden. Dies schließt Geräte und Komponenten ein, die von einem einzelnen Lieferanten in Verkehr gebracht werden und die für die Verwendung in Bergwerken vorgesehen sind, die durch Grubengas und/oder brennbare Stäube (unter atmosphärischen Bedingungen - wie in EN 1127-2 definiert) gefährdet werden können.
ANMERKUNG 1 Diese Europäische Norm beschäftigt sich nur mit dem Zündschutz von Bergbaumaschinen. Die Hersteller haben alle anderen relevanten EG-Richtlinien in Betracht zu ziehen, die die Konstruktion von Maschinen betreffen, wie z. B. die fortentwickelte Maschinerichtlinie 98/37/EG. Zusätzlich ist es erforderlich, dass die Hersteller die jeweilige nationale Gesetzgebung in dem Land in Betracht ziehen, in dem sie ihre Geräte vermarkten wollen.
ANMERKUNG 2 Enthalten die Wetter nicht vorwiegend Methan als brennbares Gas, ist ein Hinweis zu 4.1 von
EN 60079-0:2004 oder EN 13463-1:2001 erforderlich.
ANMERKUNG 3 Die Definition von 'Gerät' ist in EN 13463-1 enthalten.
Geräte, die den entsprechenden Abschnitten der vorliegenden Europäischen Norm entsprechen, erfüllen die Anforderungen für die Geräte der Gruppe I - Kategorie M2.
Diese Europäische Norm behandelt auch die Vermeidung von Zündungen von explosionsfähigen Atmosphären durch Brände (oder Glimmbrände) von brennbaren Materialien wie Gewebefasern, Kunststoff-"O"-Ringen, Gummidichtungen, Schmierölen oder -fetten, die in der Konstruktion benötigt werden, wenn solche Teile eine Zündquelle sein könnten. Z. B. kann Reibungshitze durch einen mechanischen Fehler oder rotierende Wellenlager den Plastikkäfig, die Plastikdichtung selbst oder das Schmierfett entzünden. Siehe auch 5.2.4 von EN 13463-1:2001.
ANMERKUNG 4 Der o.g. Abschnitt der EN 13463 1 fordert eine Bewertung der Zündgefahr auch für die Komponenten, die im Falle eines Fehlers in d
Appareils et composants destinés a etre utilisés dans les mines souterraines grisouteuses
La présente Norme européenne spécifie les exigences relatives aux techniques de protection contre l’explosion au niveau de la construction et du marquage des appareils (éléments individuels ou faisant partie d’un assemblage). Ceci comprend les appareils et les composants qui sont mis en circulation par un fournisseur en particulier et qui sont prévus pour etre utilisés dans les mines pouvant présenter des risques liés au grisou et / ou poussieres inflammables (dans certaines conditions d’atmospheres, comme défini dans la norme EN 1127-2).
NOTE 1 La présente Norme européenne traite uniquement de la protection des machines utilisées dans les mines. Les fabricants doivent prendre en compte toutes les autres directives européennes pertinentes concernant la construction de machines comme par exemple la directive Machines européenne amendée 98/37/EG. De plus, les fabricants devront prendre en compte tous les autres textes réglementaires nationaux en vigueur dans les pays ou sont commercialisés leurs appareils.
NOTE 2 Si le gaz inflammable dans l’atmosphere n’est pas principalement du méthane, se reporter au 4.1 de l’EN 60079-0:2004 ou a l’EN 13463-1:2001.
NOTE 3 Le terme « appareil » est défini dans l’EN 13463-1.
Les appareils répondant aux dispositions de la présente Norme européenne sont considérés comme satisfaisant aux exigences relatives aux appareils du Groupe I - Catégorie M2.
La présente Norme européenne traite également de la prévention des inflammations des atmospheres explosives provoquées par la combustion (ou le feu couvant) de matériaux combustibles tels que les fibres textiles, les joints toriques en matieres synthétiques, les joints d’étanchéité en caoutchouc, les huiles et graisses de lubrification qui sont nécessaires a la machine lorsque ces éléments peuvent représenter une source d’inflammation. L’échauffement provoqué par frottement par exemple en raison d’un défaut d’ordre mécanique ou du palier d’arbre peut enflammer la cage en plastique, le jo
Oprema in komponente, namenjene za uporabo v potencialno eksplozivnih atmosferah v podzemnih rudnikih
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1710:2006
01-april-2006
Oprema in komponente, namenjene za uporabo v potencialno eksplozivnih
atmosferah v podzemnih rudnikih
Equipment and components intended for use in potentially explosive atmospheres in
underground mines
Geräte und Komponenten für den Einsatz in schlagwettergefährdeten Bereichen von
untertägigen Bergwerken
Appareils et composants destinés a etre utilisés dans les mines souterraines
grisouteuses
Ta slovenski standard je istoveten z: EN 1710:2005
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
73.100.01 Rudarska oprema na splošno Mining equipment in general
SIST EN 1710:2006 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 1710:2006
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SIST EN 1710:2006
EUROPEAN STANDARD
EN 1710
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS 73.100.30; 29.260.20
English Version
Equipment and components intended for use in potentially
explosive atmospheres in underground mines
Appareils et composants destinés à être utilisés dans les Geräte und Komponenten für den Einsatz in
mines souterraines grisouteuses schlagwettergefährdeten Bereichen von untertägigen
Bergwerken
This European Standard was approved by CEN on 26 September 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1710:2005: E
worldwide for CEN national Members.
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EN 1710:2005 (E)
Contents Page
Foreword .4
Introduction.5
1 Scope.6
2 Normative references.6
3 Terms and definitions .8
4 Requirements for equipment (machines) and components .8
4.1 General.8
4.2 Non-electrical equipment and components .9
4.3 Electrical equipment and components.9
4.3.1 General.9
4.3.2 Electrical equipment protection.10
4.3.3 Overcurrent protection.10
4.3.4 Earth-fault protection .11
4.3.5 Mechanical protection of live parts .11
4.3.6 Electric cables that are part of the equipment .11
5 Additional requirements for specific equipment and components.12
5.1 Cutting and stripping equipment.12
5.1.1 General.12
5.1.2 Machines with cutting picks .12
5.1.3 Stripping machines .13
5.2 Rope haulages for level and inclined transport.13
5.3 Fans .13
5.3.1 Ventilating fans for use underground.13
5.3.2 Other fans.15
5.4 Diesel engines .16
5.5 Air compressors.16
5.6 Drilling equipment and components .16
5.7 Brakes.16
5.8 Traction batteries, starter batteries and vehicle lighting batteries .17
5.9 Optical fibres used on machines and electromagnetic radiation from components on
machines .17
6 Fire protection .17
6.1 General.17
6.2 Non-metallic materials .18
6.3 Internal combustion engines fitted to machines.18
6.4 Hydraulic and pneumatic equipment.18
6.5 Additional requirements for cable-reeled machines.18
6.6 Fire prevention on electric cables that are part of the machine.19
6.7 Conveyor belting .19
7 Information for use.19
7.1 Signals and warning notices.19
7.2 User instructions.19
7.2.1 General.19
7.2.2 Information on use .20
7.2.3 Information on maintenance and repair .20
7.3 Marking .20
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Annex A (informative) Example of an ignition hazard assessment for a conveyor belt intended for
use in a coal mine. 21
A.1 General. 21
A.2 Category and intended use of the equipment . 21
A.3 Construction/description of the equipment . 21
A.4 Assessment . 22
Annex B (informative) Example of an ignition hazard assessment for a shearer loader intended
for use in a potentially explosive atmosphere of a coal mine . 26
B.1 General. 26
B.2 Category and intended use of equipment . 26
B.3 Construction/description of the equipment with regard to ignition protection . 27
B.4 Ignition control and monitoring system . 27
B.5 Compliance with the basic methodology and requirements in EN 13463-1. 28
B.6 Ignition hazard assessment of the electrical parts of the equipment . 28
B.7 Ignition hazard assessment of non-electrical ignition sources. 28
B.8 Equipment marking . 28
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 94/9/EC . 35
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC . 38
Bibliography. 39
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EN 1710:2005 (E)
Foreword
This European Standard (EN 1710:2005) has been prepared by Technical Committee CEN/TC 305
“Potentially explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the
latest by May 2006.
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
European Standard.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
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Introduction
This European Standard specifies requirements for the constructional features of equipment and components
that may be an individual item or form an assembly, to enable them to be used in mines, or parts of mines,
susceptible to explosive atmospheres of firedamp and/or combustible coal dust.
Most of the electrical equipment used on mining machinery is certified as an individual item of equipment e.g.
the motor, switchgear etc., and meets its own marking requirements. This Notified Body Certification, however,
does not deal with the interconnection of these items of equipment by cables or the machine electrical power
system as an entity. In order to comply with 1.6.4 of the Essential Safety Requirements of the ATEX Directive
(94/9/EC), the equipment and components including their interconnections should be assessed, from an
ignition point of view, by the manufacturer.
Both non-electrical equipment and the interconnection of electrical/non-electrical equipment require an ignition
hazard risk assessment to satisfy the Essential Health and Safety requirements of the ATEX Directive and be
put in the appropriate declaration of conformity document.
Therefore, it is necessary that not just the equipment, but all its parts, is examined by the manufacturer
according to a formally documented hazard assessment that establishes and lists all the possible ignition
sources of the equipment including the cables and electrical supply system. The documentation shall list the
measures that shall be introduced to prevent possible ignition sources becoming effective.
The need for this European Standard arises because of major operational differences between underground
mining operations and those in other industries working with, or in, potentially explosive atmospheres.
Examples of these differences are:
the product being won from the underground strata may be combustible and continually releases
firedamp during the winning process;
the ignitability of the atmosphere around equipment and components usually depends upon the amount
of dilution offered by an active ventilating system;
the atmosphere in the general body of mine air in which machinery is working may change from one that
is potentially explosive to one that is explosive (for example, during an outburst of firedamp);
persons working in the mine are usually situated within the potentially explosive atmosphere;
there is a need to monitor constantly the mine atmosphere at strategic places to ensure that power can
be disconnected from all equipment except that which is suitable for use in an explosive atmosphere;
in gassy coal mines, an explosion of firedamp at a machine can raise a combustible dust cloud that
exacerbates the explosion;
some mining machinery, especially that associated with winning the product, contains cutting devices and
drilling devices that are intended to cut into the combustible product as part of their normal operation. This
introduces an ignition risk from frictional heating or frictional sparking from contact with strata containing
high concentrations of quartz or iron pyrites;
long roadways in coal mines are equipped with mineral conveying systems carrying a product that has a
potential for raising an explosive dust cloud.
To decide which equipment or its component parts should merit inclusion in this European Standard, ignition
data has been examined based on French, German and UK experience.
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When drafting this European Standard, it has been assumed that equipment and components are:
designed in accordance with good engineering practice, taking account of expected shocks,vibrations and
failure modes;
of sound mechanical and electrical construction;
made of materials with adequate strength and of suitable quality;
free from defects and
are kept in good repair and working order, e.g. so that the required dimensions remain within permissible
tolerance despite wear.
1 Scope
This European Standard specifies the explosion protection requirements for the construction and marking of
equipment that may be an individual item or form an assembly. This includes machinery and components
placed on the market by a single supplier for use in mines susceptible to explosive atmospheres of firedamp
and/or combustible dust (at atmospheric conditions as defined in EN 1127-2).
NOTE 1 This European Standard deals only with the ignition protection of mining machinery and manufacturers will
need to take account of all other relevant EU Directives relating to the construction of machines e.g. the consolidated
Machinery Directive 98/37/EC. Additionally, manufacturers will need to take account of any national legislation in the
country where they intend to market their equipment.
NOTE 2 Where the flammable gas in the atmosphere is not predominantly methane, reference will need to be made to
4.1 in either EN 60079-0:2004 or EN 13463-1:2001.
NOTE 3 The definition of ‘equipment’ is contained in EN 13463-1. The definition of ‘assembly’ can be found the ATEX
guidelines, published by the European Commission.
Equipment complying with the relevant clauses of this European Standard is considered to meet the
requirements for equipment of Group I - Category M2.
This European Standard also deals with the prevention of ignitions of explosive atmospheres caused by
burning (or smouldering) of combustible material such as fabric fibres, plastic ”O”-rings, rubber seals,
lubricating oils or greases used in the construction of the equipment if such items could be an ignition source.
For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its
plastic cage, plastic seal or lubricating grease. See also 5.2.4 of EN 13463-1:2001.
NOTE 4 The above clause of EN 13463-1 requires the ignition hazard assessment to include those components which,
if they failed, could ignite any flammable substance (e.g. lubricating oil) contained within the equipment and which could
consequently become, or create, an ignition source. In the case of coal mining equipment and components, the ignition
temperature of the mineral oils or greases used is often below that of firedamp, i.e. below 560 °C.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 982, Safety of machinery — Safety requirements for fluid power systems and their components —
Hydraulics
EN 983, Safety of machinery — Safety requirements for fluid power systems and their components —
Pneumatics
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EN 1127-1:1997, Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts
and methodology
EN 1127-2:2002, Explosive atmospheres — Explosion prevention and protection — Part 2: Basic concepts
and methodology for mining
EN 1554, Conveyor belts — Drum friction testing
EN 1676, Aluminium and aluminium alloys — Alloyed ingots for remelting — Specifications
EN 1834-2:2000, Reciprocating internal combustion engines — Safety requirements for design and
construction of engines for use in potentially explosive atmospheres — Part 2: Group I engines for use in
underground workings susceptible to firedamp and/or combustible dust
EN 1889-1:2003, Machines for underground mines — Mobile machines working underground — Safety —
Part 1: Rubber tyred vehicles
EN 12163, Copper and copper alloys — Rod for general purposes
EN 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres — Part 1: Basic method
and requirements
EN 13463-5:2003, Non-electrical equipment for potentially explosive atmospheres — Part 5: Protection by
constructional safety
EN 13478, Safety of machinery — Fire prevention and protection
EN 50303:2000, Group I, category M1 equipment intended to remain functional in atmospheres endangered
by firedamp and/or coal dust
EN 60079-0:2004, Electrical apparatus for explosive gas atmospheres — Part 0: General requirements
(IEC 60079-0:2004)
EN 60204-1:1997, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:1997)
EN 60204-11:2000, Safety of machinery — Electrical equipment of machines — Part 11: Requirements for HV
equipment for voltages above 1000 V a.c. or 1500 V d.c. and not exceeding 36 kV (IEC 60204-11:2000)
EN 60332-1-1, Tests on electric and optical fibre cables under fire conditions — Part 1-1: Test for vertical
flame propagation for a single insulated wire or cable — Apparatus (IEC 60332-1-1:2004)
EN 60332-1-2, Tests on electric and optical fibre cables under fire conditions — Part 1-2: Test for vertical
flame propagation for a single insulated wire or cable — Procedure for 1 kW pre-mixed flame
(IEC 60332-1-2:2004)
EN 60332-1-3, Tests on electric and optical fibre cables under fire conditions — Part 1-3 Test for vertical
flame propagation for a single insulated wire or cable — Procedure for determination of flaming
droplets/particles (IEC 60332-1-3:2004):
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN ISO 340, Conveyor belts — Laboratory scale flammability characteristics — Requirements and test
method (ISO 340:2004)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles (ISO 12100-2:2003)
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ISO 1940-1:2003, Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state —
Part 1: Specification and verification of balance tolerances
ISO 4952, Structural steels with improved atmospheric corrosion resistance
ISO 7010:2003, Graphical symbols — Safety signs in workplaces and public areas
3 Terms and definitions
For the purposes of this European Standard, the definitions in EN 1127-1:1997, EN 1127-2:2002,
EN 60079-0:2004, EN 50303:2000 and EN13463-1:2001 apply.
4 Requirements for equipment (machines) and components
4.1 General
All electrical and non-electrical equipment and components for use in a potentially explosive atmosphere shall
be designed and constructed to good engineering practice and in conformity with requirements of group I
category M2 equipment to ensure that ignition sources do not occur.
To specify the category of the equipment, it shall be subject to an ignition hazard assessment in accordance
with 5.2 of EN 13463-1:2001 for non-electrical and EN 60079-0 for electrical equipment.
NOTE 1 Where necessary, to determine any local conditions of use that affect the ignition hazard assessment,
negotiations may need to take place between the manufacturer or authorized representative, purchaser and/or user.
NOTE 2 Examples of the ignition hazard assessment for various types of mining machinery have been included in the
informative Annexes A and B. These are based on specific machines, but are not definitive and can contain alternatives.
Manufacturers are required to carry out an ignition hazard assessment for each individual machine and determine the
most appropriate measures to prevent those ignition sources becoming effective.
In particular, the following requirements described in EN 60079-0 and EN 13463-1 apply to all machines and
shall be taken into account:
the need to restrict the maximum surface temperature;
the need to meet the electrostatic requirements;
the need to restrict the use of exposed light metals;
the need to perform tests on non-metallic parts on which the ignition protection depends to ensure they
will not deteriorate in the conditions of use in mines and cause the protection to be lost (see also clause
6).
NOTE 3 To meet the requirements for maximum surface temperature, the assessment needs to be made at the
maximum duty cycle that the equipment is subject to in operation. This can be based on a combination of direct
measurement of the equipment under test, calculation or previous experience.
Equipment may be prevented from exceeding the maximum surface temperature by one, or a combination of,
the following measures:
continuous rating of the equipment so that it can easily cope with the maximum duty cycle;
a suitable short-time rating of the equipment;
additional cooling systems;
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shut-down devices measuring the temperature of either the surface or the cooling system;
limitation of power transfer through the equipment, e.g. current limitation of motor supply or
disengagement of mechanical power.
Where the means of limiting the surface temperature is not by continuous rating, the manufacturer has to
specify the special conditions of safe use in the user instructions, e.g. maximum oil temperature at which the
equipment is automatically de-energized.
NOTE 4 Welding, cutting, grinding, burning and other processes involving naked flames and/or open sparking are
normally prohibited in coal and other gassy mines unless special precautions are taken. Machines intended for use in
potentially explosive atmospheres should therefore be constructed so that such processes are not normally required to
assemble, dismantle, maintain or repair machinery underground in a gassy mine (see Directive 92/104/EEC).
In addition to the requirements for non-metallic materials specified in EN 60079-0 and EN 13463-1, where
such materials can be an ignition source, they shall be fire-resistant (see 6.2).
4.2 Non-electrical equipment and components
All non-electrical equipment and components (including parts used within the machine in order to connect
them), shall comply with the requirements of EN 13463-1 and, where necessary, one of the other types of
ignition protection listed in that standard, except where specific requirements exist in this European Standard,
e.g. the fitting of water spray ignition protection to cutting picks.
NOTE 1 EN 13463-1 deals with ignition protection of non-electrical equipment and components intended for use in
both potentially explosive gas atmospheres and potentially explosive dust atmospheres, existing either separately, or
combined.
NOTE 2 Examples of ignition protection standards particularly relevant to mining are:
EN 13463-5 (Protection by constructional safety ‘c’);
EN 13463-6 (Protection by control of ignition sources 'b');
EN 13463-8 (Protection by liquid immersion ‘k’).
4.3 Electrical equipment and components
4.3.1 General
All electrical equipment and components shall comply with the requirements of EN 60079-0 and at least one
of the types of ignition protection listed in that standard.
NOTE 1 EN 60079-0 deals primarily with the ignition protection of electrical equipment and components intended for
use in potentially explosive gas atmospheres. For gassy mines, equipment tested in an explosive gas atmosphere and
protected against igniting firedamp is also adequately protected against ignition of an explosive coal dust cloud.
NOTE 2 Examples of ignition protection standards particularly relevant to mining are:
EN 60079-1 (Flameproof enclosure "d");
EN 60079-7 (Increased safety "e");
EN 50020 (Intrinsic safety "i").
As a general rule, electrical equipment on machines shall comply with EN 60204-1 and EN 60204-11, except
where the differences are stated in the following clauses of this European Standard.
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Where protective measures depend on devices external to the machine, the manufacturer shall specify these
in the user instructions. For the purposes of this European Standard, the requirements below commence at
the point where the electrical supply is connected to the machine (terminals, plug and socket).
NOTE 3 All terms used to describe electrical devices are as defined in IEC 60050-441.
4.3.2 Electrical equipment protection
When electrical equip
...
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