IEC 60079-35-1:2011

Explosive atmospheres - Part 35-1: Caplights for use in mines susceptible to firedamp - General requirements - Construction and testing in relation to the risk of explosion

IEC 60079-35-1:2011 specifies requirements for the construction, testing and marking of caplights, including caplights with a point of connection for other equipment, for use in mines susceptible to firedamp (Group I - electrical equipment for explosive gas atmospheres as defined in IEC 60079-0). It deals only with the risk of the caplight becoming a source of ignition. The requirements for performance are in IEC 60079-35-2. This standard supplements and modifies the general requirements of IEC 60079-0 except as indicated in Table 1. This first edition cancels and replaces the second edition of IEC 62013-1, published in 2005, and constitutes a full technical revision. The main technical differences with respect to the previious edition are:
- the introduction of a means to achieve an equipment protection level (EPL) of Ma;
- the introduction of a single clause relating to equipment construction replacing individual specific clauses for the headpiece, battery, cable and external charging contacts;
- the deletion of statements relating to surface temperature, the rewording of statements relating to creepage and clearance and the addition of statements relating to thermal protection, electronic assemblies and additional circuitry;
- specific referenc to lithium cells;
- the addition of statements relating to battery recharging and protection against deep discharge.

Atmosphères explosives - Partie 35-1: Lampes-chapeaux utilisables dans les mines grisouteuses - Exigences générales - Construction et essais liés au risque d'explosion

La CEI 60079-35-1:2011 spécifie les exigences pour la construction, les essais et le marquage des lampes-chapeaux, y compris les lampes-chapeaux avec un point de connexion pour d'autres matériels, utilisables dans les mines grisouteuses (Groupe I - matériels électriques pour les atmosphères explosives gazeuses comme définies dans la CEI 60079-0). Elle traite uniquement du risque, présenté par une lampe-chapeau, de devenir une source d'inflammation. Les exigences d'aptitude à la fonction se trouvent dans la CEI 60079-35-2. La présente norme complète et modifie les exigences générales de la CEI 60079-0, excepté pour ce qui est indiqué dans le Tableau 1. Cette première édition annule et remplace la deuxième édition de la CEI 62013-1, parue en 2005, et constitue une révision technique générale. Les différences techniques principales par rapport à l'édition précédente sont:
- l'introduction d'un article unique relatif à la construction du matériel, remplaçant les différents articles spécifiques pour le projecteur, la batterie, le câble et les contacts extérieurs de charge;
- la suppression des indications concernant la température de surface, la reformulation des énoncés relatifs aux lignes de fuite et aux distances dans l'air, et l'adjonction d'indications concernant la protection thermique, les ensembles électroniques et les circuits additionnels;
- une référence spécifique aux éléments au lithium;
- l'adjonction d'indications concernant la recharge de la batterie et la protection contre la décharge sévère.

General Information

• Status: Published
• Publication Date: 25-May-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: TC 31 - Equipment for explosive atmospheres
• Drafting Committee: MT 60079-35 - TC 31/MT 60079-35
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jun-2011
• Completion Date: 26-May-2011

Relations

• Replaces: IEC 62013-1:2005 - Caplights for use in mines susceptible to firedamp - Part 1: General requirements - Construction and testing in relation to the risk of explosion
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60079-35-1 ®
Edition 1.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 35-1: Caplights for use in mines susceptible to firedamp – General
requirements – Construction and testing in relation to the risk of explosion

Atmosphères explosives –
Partie 35-1: Lampes-chapeaux utilisables dans les mines grisouteuses –
Exigences générales – Construction et essais liés au risque d'explosion

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IEC 60079-35-1 ®
Edition 1.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 35-1: Caplights for use in mines susceptible to firedamp – General
requirements – Construction and testing in relation to the risk of explosion

Atmosphères explosives –
Partie 35-1: Lampes-chapeaux utilisables dans les mines grisouteuses –
Exigences générales – Construction et essais liés au risque d'explosion

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 29.260.20 ISBN 978-2-88912-518-0

– 2 – 60079-35-1  IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 10
3 Terms and definitions . 10
4 Level of protection . 11
4.1 General . 11
4.2 Additional requirements for EPL “Ma” . 12
4.3 Thermal ignition compliance . 12
4.4 Spark ignition compliance . 12
5 Equipment construction . 12
5.1 Enclosures . 12
5.1.1 Headpiece enclosure . 12
5.1.2 Battery enclosure . 13
5.2 Cable . 13
5.3 External charging contacts . 13
5.4 Internal electrical connections . 13
5.5 Solid electrical insulating materials . 14
5.6 Internal wiring . 14
5.7 Supply of electrical power to other equipment . 14
5.8 Creepage and clearance distances . 14
5.9 Assembled electrical connection . 14
5.10 Thermal protection . 14
6 Overcurrent protection . 15
6.1 General . 15
6.2 Fuse or thermal circuit-breaker . 15
6.3 Resistive safety . 15
7 Cells and batteries . 16
8 Type verifications and tests . 16
8.1 Impact test . 16
8.2 Drop tests . 16
8.3 Degree of protection (IP) by enclosures . 16
8.4 Test to verify the non-ignition of a representative electrolytic gas mixture or
firedamp by fuse or thermal circuit-breaker . 17
8.5 Test to verify the non-ignition of a gas mixture by one strand of the cable
between the headpiece and the battery by thermal ignition . 17
8.6 Test to verify the resistance of the cable sheath to fatty acids . 17
8.7 Test to verify the resistance of the cable sheath to fire . 17
8.8 Test to verify the strength of cable entries, anchoring devices and cable . 17
8.9 Electrolyte leakage test for cells and batteries . 18
8.10 Current-limiting resistor test . 18
8.10.1 Current-limiting resistor not protected by a non-replaceable
resettable fuse . 18
8.10.2 Current-limiting resistor protected by a non-replaceable resettable
fuse . 18
8.10.3 Verification . 18

60079-35-1  IEC:2011 – 3 –
9 Marking . 18
9.1 General . 18
9.2 Examples of marking . 19
10 Instructions. 19

Figure 1 – Example of a caplight assembly . 11

Table 1 – Application or exclusion of specific clauses of IEC 60079-0 . 8

– 4 – 60079-35-1  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 35-1: Caplights for use in mines susceptible to firedamp –
General requirements – Construction and testing
in relation to the risk of explosion

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