IEC 60079-19:2010
(Main)Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
IEC 60079-19:2010 gives instructions, principally of a technical nature, on the repair, overhaul, reclamation and modification of equipment designed for use in explosive atmospheres; it is not applicable to maintenance, other than when repair and overhaul cannot be disassociated from maintenance, neither does it give advice on cable entry systems which may require a renewal when the equipment is re-installed. The significant technical changes with respect to the previous edition are:
- inclusion of specific Group I requirements;
- inclusion of offshore requirements.
Atmosphères explosives - Partie 19: Réparation, révision et remise en état de l'appareil
La CEI 60079-19:2010 donne des instructions, principalement de nature technique, pour la réparation, la révision, la remise en état et la modification de l'appareil conçu pour être utilisé en atmosphères explosives; il n'est pas applicable à l'entretien, sauf lorsque la réparation et la révision ne peuvent être dissociées de l'entretien, pas plus qu'elle ne donne des conseils sur les systèmes d'entrées de câbles qui peuvent exiger un renouvellement quand l'appareil est réinstallé. Les modifications techniques importantes par rapport à l'édition précédente sont:
- inclusion des exigences spécifiques du Groupe I;
- inclusion des exigences "offshore".
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IEC 60079-19 ®
Edition 3.1 2015-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
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IEC 60079-19 ®
Edition 3.1 2015-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.260.20 ISBN 978-2-8322-2498-4
IEC 60079-19 ®
Edition 3.1 2015-03
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
– 2 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General . 13
4.1 General principles . 13
4.2 Statutory requirements for repair facility . 14
4.3 Instructions for the user . 14
4.3.1 Certificates and documents . 14
4.3.2 Records and work instructions . 14
4.3.3 Re-installation of repaired equipment . 14
4.3.4 Repair facilities . 15
4.4 Instructions for the repair facility . 15
4.4.1 Repair and overhaul . 15
4.4.2 Reclamations . 19
4.4.3 Alterations and modifications . 21
4.4.4 Temporary repairs . 22
4.4.5 Rotating machinery . 22
4.4.6 Inverters . 23
5 Additional requirements for the repair and overhaul of equipment with type of
protection "d" (flameproof) . 23
5.1 Application . 23
5.2 Repair and overhaul . 23
5.2.1 Enclosures . 23
5.2.2 Cable and conduit entries . 24
5.2.3 Terminations . 24
5.2.4 Insulation. 24
5.2.5 Internal connections . 24
5.2.6 Windings . 24
5.2.7 Auxiliary equipment . 26
5.2.8 Light-transmitting parts . 27
5.2.9 Encapsulated parts . 27
5.2.10 Batteries . 27
5.2.11 Lamps . 27
5.2.12 Lampholders . 27
5.2.13 Ballasts . 27
5.2.14 Breathing devices . 27
5.3 Reclamation . 27
5.3.1 General . 27
5.3.2 Enclosures . 27
5.3.3 Sleeving . 28
5.3.4 Shafts and housings . 28
5.3.5 Sleeve bearings . 29
5.3.6 Rotors and stators . 29
5.4 Alterations and modifications . 29
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5.4.1 Enclosures . 29
5.4.2 Cable or conduit entries . 29
5.4.3 Terminations . 29
5.4.4 Windings . 29
5.4.5 Auxiliary equipment . 30
6 Additional requirements for the repair and overhaul of equipment with type of
protection "i" (intrinsic safety) . 30
6.1 Application . 30
6.2 Repair and overhaul . 30
6.2.1 Enclosures . 30
6.2.2 Cable glands . 30
6.2.3 Terminations . 30
6.2.4 Soldered connections . 30
6.2.5 Fuses . 31
6.2.6 Relays . 31
6.2.7 Shunt diode safety barriers and galvanic isolators . 31
6.2.8 Printed circuit boards . 32
6.2.9 Optocouplers and piezoelectric components . 32
6.2.10 Electrical components . 32
6.2.11 Batteries . 32
6.2.12 Internal wiring . 32
6.2.13 Transformers . 33
6.2.14 Encapsulated components . 33
6.2.15 Non-electrical parts . 33
6.2.16 Testing . 33
6.3 Reclamation . 33
6.4 Modifications . 33
7 Additional requirements for the repair and overhaul of equipment with type of
protection "p" (pressurized) . 33
7.1 Application . 33
7.2 Repair and overhaul . 34
7.2.1 Enclosures . 34
7.2.2 Cable and conduit entries . 34
7.2.3 Terminations . 34
7.2.4 Insulation. 34
7.2.5 Internal connections . 34
7.2.6 Windings . 34
7.2.7 Auxiliary devices . 36
7.2.8 Light-transmitting parts . 36
7.2.9 Encapsulated parts . 36
7.2.10 Batteries . 37
7.2.11 Lamps . 37
7.2.12 Lampholders . 37
7.2.13 Ballasts . 37
7.3 Reclamation . 37
7.3.1 General . 37
7.3.2 Enclosures . 37
7.3.3 Shafts and housings . 37
7.3.4 Sleeve bearings . 37
– 4 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
7.3.5 Rotors and stators . 38
7.4 Alterations and modifications . 38
7.4.1 Enclosures . 38
7.4.2 Cable and conduit entries . 38
7.4.3 Terminations . 38
7.4.4 Windings . 38
7.4.5 Auxiliary equipment . 38
8 Additional requirements for the repair and overhaul of equipment with type of
protection "e" (increased safety) . 39
8.1 Application . 39
8.2 Repair and overhaul . 39
8.2.1 Enclosures . 39
8.2.2 Cable or conduit entries . 39
8.2.3 Terminations . 39
8.2.4 Insulation. 40
8.2.5 Internal connections . 40
8.2.6 Windings . 40
8.2.7 Light-transmitting parts . 44
8.2.8 Encapsulated parts . 44
8.2.9 Batteries . 44
8.2.10 Lamps . 44
8.2.11 Lampholders . 44
8.2.12 Ballasts . 44
8.2.13 Breathing devices . 44
8.3 Reclamation . 44
8.3.1 Enclosures . 44
8.3.2 Sleeve bearings . 45
8.3.3 Rotors and stators . 45
8.4 Modifications . 45
8.4.1 Enclosures . 45
8.4.2 Cable and conduit entries . 45
8.4.3 Terminations . 45
8.4.4 Windings . 46
8.4.5 Auxiliary equipment . 46
9 Additional requirements for the repair and overhaul of equipment with type of
protection "n" . 46
9.1 Application . 46
9.2 Repair and overhaul . 46
9.2.1 Enclosures . 46
9.2.2 Cable and conduit entries . 47
9.2.3 Terminations . 47
9.2.4 Insulation. 47
9.2.5 Internal connections . 47
9.2.6 Windings . 47
9.2.7 Light-transmitting parts . 50
9.2.8 Encapsulated parts . 51
9.2.9 Batteries . 51
9.2.10 Lamps . 51
9.2.11 Lamp holders . 51
+AMD1:2015 IEC 2015
9.2.12 Ballasts . 51
9.2.13 Enclosed break devices . 51
9.2.14 Breathing devices . 51
9.3 Reclamation . 51
9.3.1 General . 51
9.3.2 Enclosures . 51
9.3.3 Joints . 52
9.3.4 Shafts and housings . 52
9.3.5 Sleeve bearings . 52
9.3.6 Rotors and stators . 52
9.4 Alterations and modifications . 52
9.4.1 Enclosures . 52
9.4.2 Cable and conduit entries . 52
9.4.3 Terminations . 52
9.4.4 Windings . 52
9.4.5 Auxiliary equipment . 53
10 Additional requirements for the repair and overhaul of equipment covered by
IEC 60079-26 . 53
11 Additional requirements for the repair and overhaul of equipment with type of
protection Group III ‘t’ (formerly known as ‘tD’ or DIP) . 53
11.1 Application . 53
11.2 Repair and overhaul . 53
11.2.1 Enclosures . 53
11.2.2 Cable and conduit entries . 54
11.2.3 Terminations . 54
11.2.4 Insulation. 54
11.2.5 Internal connections . 54
11.2.6 Windings . 54
11.2.7 Light-transmitting parts . 56
11.2.8 Batteries . 56
11.2.9 Lamps . 57
11.2.10 Lamp holders . 57
11.2.11 Ballasts . 57
11.2.12 Breathing devices . 57
11.3 Reclamation . 57
11.3.1 Enclosures . 57
11.3.2 Joints . 57
11.3.3 Shafts and housings . 57
11.3.4 Sleeve bearings . 58
11.3.5 Rotors and stators . 58
11.4 Alterations and modifications . 58
11.4.1 Enclosures . 58
11.4.2 Cable and conduit entries . 58
11.4.3 Windings . 58
11.4.4 Auxiliary equipment . 58
12 Additional requirements for the repair and overhaul of equipment with type of
protection pressurization ’pD’ . 58
12.1 Application . 58
12.2 Repair and overhaul . 59
– 6 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
12.3 Reclamation . 59
12.4 Modifications . 59
Annex A (normative) Identification of repaired equipment by marking . 60
Annex B (normative) Knowledge, skills and competencies of “responsible persons”
and “operatives” . 62
Annex C (normative) Requirements for measurements in flameproof equipment during
overhaul, repair and reclamation (including guidance on tolerances). 64
Annex D (informative) . 67
Bibliography . 68
Figure C.1 – Determination of maximum gap of reclaimed parts . 66
Table C.1 – Determination of maximum gap of reclaimed parts . 64
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 19: Equipment repair, overhaul and reclamation
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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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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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60079-19 edition 3.1 contains the third edition (2010-11) [documents 31J/180/FDIS and
31J/192/RVD] and its amendment 1 (2015-03) [documents 31J/249/FDIS and 31J/250/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions and deletions are displayed in red, with deletions being
struck through. A separate Final version with all changes accepted is available in this
publication.
– 8 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
International Standard IEC 60079-19 has been prepared by subcommittee 31J: Classification
of hazardous areas and installation requirements, of IEC technical committee 31: Equipment
for explosive atmospheres.
The significant technical changes with respect to the previous edition are as follows:
• inclusion of specific Group I requirements;
• inclusion of offshore requirements.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60079 series, under the general title Explosive atmospheres, can
be found on the IEC website.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
+AMD1:2015 IEC 2015
INTRODUCTION
When electrical equipment is installed in areas where dangerous concentrations and
quantities of flammable gases, vapours, mists or dusts may be present in the atmosphere,
protective measures are to be applied to reduce the likelihood of explosion due to ignition by
arcs, sparks or hot surfaces produced either in normal operation or under specified fault
conditions.
This part of IEC 60079 is supplementary to other relevant IEC standards, for example
IEC 60364 series, as regards installation requirements, and also refers to IEC 60079 series
and its appropriate parts for the design requirements of suitable electrical equipment.
Clause 4 of this part of IEC 60079 contains general requirements for the repair and overhaul
of equipment and should be read in conjunction with the other relevant clauses of this
standard dealing with the detailed requirements for individual types of protection.
In cases where protected equipment incorporates more than one type of protection, reference
should be made to all clauses involved.
This part not only gives guidance on the practical means of maintaining the electrical safety
and performance requirements of repaired equipment, but also defines procedures for
maintaining, after repair, overhaul or reclamation, compliance of the equipment with the
provisions of the certificate of conformity or with the provisions of the appropriate explosion
protection standard where a certificate is not available.
The nature of the explosion protection offered by each type of protection varies according to
its unique features. Reference should be made to the appropriate standard(s) for details.
Users will utilize the most appropriate repair facilities for any particular item of equipment,
whether they be the facilities of the manufacturer or a suitably competent and equipped
repairer (see Note).
This part recognizes the necessity of a required level of competence for the repair, overhaul
and reclamation of the equipment. Some manufacturers may recommend that the equipment
be repaired only by them.
In the case of the repair, overhaul or reclamation of equipment which has been the subject of
design certification, it may be necessary to clarify the position of the continued conformity of
the equipment with the certificate.
NOTE Whilst some manufacturers recommend that certain equipment be returned to them for repair or
reclamation, there are also competent independent repair organizations who have the facilities to carry out repair
work on equipment employing some or all of the types of protection covered by IEC 60079 series. For repaired
equipment to retain the integrity of the type(s) of protection employed in its design and construction, detailed
knowledge of the original manufacturer’s design (which may only be obtainable from design and manufacturing
drawings) and any certificate documentation may be necessary. Where equipment is not being returned to the
original manufacturer for repair or reclamation, the use of repair organizations that are recommended by the
original manufacturer should be considered.
– 10 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
EXPLOSIVE ATMOSPHERES –
Part 19: Equipment repair, overhaul and reclamation
1 Scope
This part of IEC 60079
– gives instructions, principally of a technical nature, on the repair, overhaul, reclamation
and modification of equipment designed for use in explosive atmospheres;
– is not applicable to maintenance, other than when repair and overhaul cannot be
disassociated from maintenance, neither does it give advice on cable entry systems which
may require a renewal when the equipment is re-installed;
– is not applicable to type of protection “m”, “o” and “q”;
– assumes that good engineering practices are adopted throughout.
NOTE Much of the content of this standard is concerned with the repair and overhaul of electrical machines. This
is not because they are the most important items of explosion-protected equipment, but rather because they are
often major items of repairable capital equipment in which, whatever type of protection is involved, sufficient
commonality of construction exists as to make possible more detailed instructions for their repair, overhaul,
reclamation or modification.
2 Normative references
The following referenced documents are indispensable for the application 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 (all parts), Explosive atmospheres
IEC 60079-0, Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-1, Explosive atmospheres – Part 1: Equipment protection by flameproof enclosures
“d”
IEC 60079-2, Explosive atmospheres – Part 2: Equipment protection by pressurized enclosure
«p»
IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased safety "e"
IEC 60079-7:1990, Electrical apparatus for explosive gas atmospheres – Part 7: Increased
safety "e"
IEC 60079-7:2001, Electrical apparatus for explosive gas atmospheres – Part 7: Increased
safety "e"
IEC 60079-14, Explosive atmospheres – Part 14: Electrical installations design, selection and
erection
IEC 60079-15:2005, Electrical apparatus for explosive gas atmospheres – Part 15:
Construction, test and marking of type of protection "n" electrical apparatus
+AMD1:2015 IEC 2015
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"
IEC 60079-19, Explosive atmospheres – Part 19: Equipment repair, overhaul and reclamation
IEC 60079-26, Explosive atmospheres – Part 26:Equipment with equipment protection level
(EPL) Ga
IEC 60085, Electrical insulation – Thermal evaluation and designation
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61241 (all parts), Electrical apparatus for use in the presence of combustible dust
IEC 61241-0, Electrical apparatus for use in the presence of combustible dust – Part 0:
General requirements
IEC 61241-4, Electrical apparatus for use in the presence of combustible dust – Part 4:Type
of protection “pD”
ISO 4526, Metallic coatings – Electroplated coatings of nickel for engineering purposes
ISO 6158, Metallic coatings – Electrodeposited coatings of chromium for engineering
purposes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60079-0 and the
following apply.
NOTE Additional definitions applicable to explosive atmospheres can be found in IEC 60050-426.
3.1
serviceable condition
condition which permits a replacement or reclaimed component part to be used without
prejudice to the performance or explosion protection aspects of the equipment, with due
regard to the requirements of the certificate documentation as applicable, in which such a
component part is used
3.2
repair
action to restore faulty equipment to its fully serviceable condition complying with the relevant
standard
NOTE The relevant standard means the standard to which the equipment was originally designed.
3.3
overhaul
action to restore to a fully serviceable condition equipment which has been in use or in
storage for a period of time but which is not faulty
3.4
maintenance
routine actions taken to preserve the fully serviceable condition of the installed equipment
(see Clause 1)
– 12 – IEC 60079-19:2010
+AMD1:2015 IEC 2015
3.5
component part
an indivisible item
NOTE The assembly of such items may form equipment.
3.6
reclamation
mean
...
IEC 60079-19 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
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International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
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IEC 60079-19 ®
Edition 3.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 29.260.20 ISBN 978-2-88912-259-2
– 2 – 60079-19 Ó IEC:2010
CONTENTS
FOREW ORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General . 13
4.1 General principles . 13
4.2 Statutory requirements for repair facility . 14
4.3 Instructions for the user . 14
4.3.1 Certificates and documents . 14
4.3.2 Records and work instructions . 14
4.3.3 Re-installation of repaired equipment . 14
4.3.4 Repair facilities . 14
4.4 Instructions for the repair facility . 14
4.4.1 Repair and overhaul . 14
4.4.2 Reclamations . 19
4.4.3 Alterations and modifications . 21
4.4.4 Temporary repairs . 21
4.4.5 Rotating machinery . 22
4.4.6 Inverters. 22
5 Additional requirements for the repair and overhaul of equipment with type of
protection "d" (flameproof) . 23
5.1 Application . 23
5.2 Repair and overhaul . 23
5.2.1 Enclosures . 23
5.2.2 Cable and conduit entries . 24
5.2.3 Terminations. 24
5.2.4 Insulation . 24
5.2.5 Internal connections . 24
5.2.6 Windings . 24
5.2.7 Auxiliary equipment . 26
5.2.8 Light-transmitting parts . 26
5.2.9 Encapsulated parts. 26
5.2.10 Batteries . 26
5.2.11 Lam ps . 26
5.2.12 Lam pholders . 27
5.2.13 Ballasts . 27
5.2.14 Breathing devices. 27
5.3 Reclamation . 27
5.3.1 General . 27
5.3.2 Enclosures . 27
5.3.3 Sleeving . 28
5.3.4 Shafts and housings . 28
5.3.5 Sleeve bearings . 28
5.3.6 Rotors and stators . 28
5.4 Alterations and modifications . 29
60079-19 Ó IEC:2010 – 3 –
5.4.1 Enclosures . 29
5.4.2 Cable or conduit entries . 29
5.4.3 Terminations. 29
5.4.4 Windings . 29
5.4.5 Auxiliary equipment . 29
6 Additional requirements for the repair and overhaul of equipment with type of
protection "i" (intrinsic safety) . 29
6.1 Application . 29
6.2 Repair and overhaul . 30
6.2.1 Enclosures . 30
6.2.2 Cable glands . 30
6.2.3 Terminations. 30
6.2.4 Soldered connections . 30
6.2.5 Fuses . 31
6.2.6 Relays . 31
6.2.7 Shunt diode safety barriers and galvanic isolators . 31
6.2.8 Printed circuit boards . 31
6.2.9 Optocouplers and piezoelectric components . 31
6.2.10 Electrical components. 32
6.2.11 Batteries . 32
6.2.12 Internal wiring . 32
6.2.13 Transformers . 32
6.2.14 Encapsulated components . 32
6.2.15 Non-electrical parts . 33
6.2.16 Testing . 33
6.3 Reclamation . 33
6.4 Modifications . 33
7 Additional requirements for the repair and overhaul of equipment with type of
protection "p" (pressurized) . 33
7.1 Application . 33
7.2 Repair and overhaul . 33
7.2.1 Enclosures . 33
7.2.2 Cable and conduit entries . 34
7.2.3 Terminations. 34
7.2.4 Insulation . 34
7.2.5 Internal connections . 34
7.2.6 Windings . 34
7.2.7 Auxiliary devices . 36
7.2.8 Light-transmitting parts . 36
7.2.9 Encapsulated parts. 36
7.2.10 Batteries . 36
7.2.11 Lam ps . 36
7.2.12 Lam pholders . 36
7.2.13 Ballasts . 37
7.3 Reclamation . 37
7.3.1 General . 37
7.3.2 Enclosures . 37
7.3.3 Shafts and housings . 37
7.3.4 Sleeve bearings . 37
– 4 – 60079-19 Ó IEC:2010
7.3.5 Rotors and stators . 37
7.4 Alterations and modifications . 38
7.4.1 Enclosures . 38
7.4.2 Cable and conduit entries . 38
7.4.3 Terminations. 38
7.4.4 Windings . 38
7.4.5 Auxiliary equipment . 38
8 Additional requirements for the repair and overhaul of equipment with type of
protection "e" (increased safety) . 38
8.1 Application . 38
8.2 Repair and overhaul . 39
8.2.1 Enclosures . 39
8.2.2 Cable or conduit entries . 39
8.2.3 Terminations. 39
8.2.4 Insulation . 39
8.2.5 Internal connections . 39
8.2.6 Windings . 40
8.2.7 Light-transmitting parts . 42
8.2.8 Encapsulated parts. 42
8.2.9 Batteries . 43
8.2.10 Lam ps . 43
8.2.11 Lam pholders . 43
8.2.12 Ballasts . 43
8.2.13 Breathing devices. 43
8.3 Reclamation . 43
8.3.1 Enclosures . 43
8.3.2 Sleeve bearings . 44
8.3.3 Rotors and stators . 44
8.4 Modifications . 44
8.4.1 Enclosures . 44
8.4.2 Cable and conduit entries . 44
8.4.3 Terminations. 44
8.4.4 Windings . 44
8.4.5 Auxiliary equipment . 45
9 Additional requirements for the repair and overhaul of equipment with type of
protection "n" . 45
9.1 Application . 45
9.2 Repair and overhaul . 45
9.2.1 Enclosures . 45
9.2.2 Cable and conduit entries . 45
9.2.3 Terminations. 45
9.2.4 Insulation . 46
9.2.5 Internal connections . 46
9.2.6 Windings . 46
9.2.7 Light-transmitting parts . 48
9.2.8 Encapsulated parts. 48
9.2.9 Batteries . 48
9.2.10 Lam ps . 49
9.2.11 Lamp holders . 49
60079-19 Ó IEC:2010 – 5 –
9.2.12 Ballasts . 49
9.2.13 Enclosed break devices . 49
9.2.14 Breathing devices. 49
9.3 Reclamation . 49
9.3.1 General . 49
9.3.2 Enclosures . 49
9.3.3 Joints . 49
9.3.4 Shafts and housings . 50
9.3.5 Sleeve bearings . 50
9.3.6 Rotors and stators . 50
9.4 Alterations and modifications . 50
9.4.1 Enclosures . 50
9.4.2 Cable and conduit entries . 50
9.4.3 Terminations. 50
9.4.4 Windings . 50
9.4.5 Auxiliary equipment . 50
10 Additional requirements for the repair and overhaul of equipment covered by
IEC 60079-26 . 51
11 Additional requirements for the repair and overhaul of equipment with type of
protection Group III ‘t’ (formerly known as ‘tD’ or DIP) . 51
11.1 Application . 51
11.2 Repair and overhaul . 51
11.2.1 Enclosures . 51
11.2.2 Cable and conduit entries . 52
11.2.3 Terminations . 52
11.2.4 Insulation . 52
11.2.5 Internal connections . 52
11.2.6 Windings . 52
11.2.7 Light-transmitting parts . 54
11.2.8 Batteries . 54
11.2.9 Lamps. 54
11.2.10 Lamp holders . 54
11.2.11 Ballasts . 55
11.2.12 Breathing devices . 55
11.3 Reclamation . 55
11.3.1 Enclosures . 55
11.3.2 Joints . 55
11.3.3 Shafts and housings . 55
11.3.4 Sleeve bearings . 55
11.3.5 Rotors and stators . 55
11.4 Alterations and modifications . 56
11.4.1 Enclosures . 56
11.4.2 Cable and conduit entries . 56
11.4.3 Windings . 56
11.4.4 Auxiliary equipment . 56
12 Additional requirements for the repair and overhaul of equipment with type of
protection pressurization ’pD’ . 56
12.1 Application . 56
12.2 Repair and overhaul . 56
– 6 – 60079-19 Ó IEC:2010
12.3 Reclamation . 57
12.4 Modifications . 57
Annex A (normative) Identification of repaired equipment by marking . 58
Annex B (normative) Knowledge, skills and competencies of “responsible persons”
and “operatives” . 60
Annex C (normative) Requirements for measurements in flameproof equipment during
overhaul, repair and reclamation (including guidance on tolerances) . 62
Bibliography . 65
Figure C.1 – Determination of maximum gap of reclaimed parts . 64
Table C.1 – Determination of maximum gap of reclaimed parts . 62
60079-19 Ó IEC:2010 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 19: Equipment repair, overhaul and reclamation
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
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
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
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 60079-19 has been prepared by subcommittee 31J: Classification
of hazardous areas and installation requirements, of IEC technical committee 31: Equipment
for explosive atmospheres.
This third edition cancels and replaces the second edition published in 2006 and constitutes a
technical revision.
The significant technical changes with respect to the previous edition are as follows:
· inclusion of specific Group I requirements;
· inclusion of offshore requirements.
– 8 – 60079-19 Ó IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
31J/180/FDIS 31J/192/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.
A list of all parts of the IEC 60079 series, under the general title Explosive atmospheres, can
be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site 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.
60079-19 Ó IEC:2010 – 9 –
INTRODUCTION
When electrical equipment is installed in areas where dangerous concentrations and
quantities of flammable gases, vapours, mists or dusts may be present in the atmosphere,
protective measures are to be applied to reduce the likelihood of explosion due to ignition by
arcs, sparks or hot surfaces produced either in normal operation or under specified fault
conditions.
This part of IEC 60079 is supplementary to other relevant IEC standards, for example
IEC 60364 series, as regards installation requirements, and also refers to IEC 60079 series
and its appropriate parts for the design requirements of suitable electrical equipment.
Clause 4 of this part of IEC 60079 contains general requirements for the repair and overhaul
of equipment and should be read in conjunction with the other relevant clauses of this
standard dealing with the detailed requirements for individual types of protection.
In cases where protected equipment incorporates more than one type of protection, reference
should be made to all clauses involved.
This part not only gives guidance on the practical means of maintaining the electrical safety
and performance requirements of repaired equipment, but also defines procedures for
maintaining, after repair, overhaul or reclamation, compliance of the equipment with the
provisions of the certificate of conformity or with the provisions of the appropriate explosion
protection standard where a certificate is not available.
The nature of the explosion protection offered by each type of protection varies according to
its unique features. Reference should be made to the appropriate standard(s) for details.
Users will utilize the most appropriate repair facilities for any particular item of equipment,
whether they be the facilities of the manufacturer or a suitably competent and equipped
repairer (see Note).
This part recognizes the necessity of a required level of competence for the repair, overhaul
and reclamation of the equipment. Some manufacturers may recommend that the equipment
be repaired only by them.
In the case of the repair, overhaul or reclamation of equipment which has been the subject of
design certification, it may be necessary to clarify the position of the continued conformity of
the equipment with the certificate.
NOTE Whilst some manufacturers recommend that certain equipment be returned to them for repair or
reclamation, there are also competent independent repair organizations who have the facilities to carry out repair
work on equipment employing some or all of the types of protection covered by IEC 60079 series. For repaired
equipment to retain the integrity of the type(s) of protection employed in its design and construction, detailed
knowledge of the original manufacturer’s design (which may only be obtainable from design and manufacturing
drawings) and any certificate documentation may be necessary. Where equipment is not being returned to the
original manufacturer for repair or reclamation, the use of repair organizations that are recommended by the
original manufacturer should be considered.
– 10 – 60079-19 Ó IEC:2010
EXPLOSIVE ATMOSPHERES –
Part 19: Equipment repair, overhaul and reclamation
1 Scope
This part of IEC 60079
– gives instructions, principally of a technical nature, on the repair, overhaul, reclamation
and modification of equipment designed for use in explosive atmospheres;
– is not applicable to maintenance, other than when repair and overhaul cannot be
disassociated from maintenance, neither does it give advice on cable entry systems which
may require a renewal when the equipment is re-installed;
– is not applicable to type of protection “m”, “o” and “q”;
– assumes that good engineering practices are adopted throughout.
NOTE Much of the content of this standard is concerned with the repair and overhaul of electrical machines. This
is not because they are the most important items of explosion-protected equipment, but rather because they are
often major items of repairable capital equipment in which, whatever type of protection is involved, sufficient
commonality of construction exists as to make possible more detailed instructions for their repair, overhaul,
reclamation or modification.
2 Normative references
The following referenced documents are indispensable for the application 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 (all parts), Explosive atmospheres
IEC 60079-0, Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-1, Explosive atmospheres – Part 1: Equipment protection by flameproof enclosures
“d”
IEC 60079-2, Explosive atmospheres – Part 2: Equipment protection by pressurized enclosure
«p»
IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased safety "e"
IEC 60079-14, Explosive atmospheres – Part 14: Electrical installations design, selection and
erection
IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of protection
"n"
IEC 60079-19, Explosive atmospheres – Part 19: Equipment repair, overhaul and reclamation
IEC 60079-26, Explosive atmospheres – Part 26:Equipment with equipment protection level
(EPL) Ga
IEC 60085, Electrical insulation – Thermal evaluation and designation
60079-19 Ó IEC:2010 – 11 –
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61241 (all parts), Electrical apparatus for use in the presence of combustible dust
IEC 61241-0, Electrical apparatus for use in the presence of combustible dust – Part 0:
General requirements
IEC 61241-4, Electrical apparatus for use in the presence of combustible dust – Part 4:Type
of protection “pD”
ISO 4526, Metallic coatings – Electroplated coatings of nickel for engineering purposes
ISO 6158, Metallic coatings – Electrodeposited coatings of chromium for engineering
purposes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60079-0 and the
following apply.
NOTE Additional definitions applicable to explosive atmospheres can be found in IEC 60050-426.
3.1
serviceable condition
condition which permits a replacement or reclaimed component part to be used without
prejudice to the performance or explosion protection aspects of the equipment, with due
regard to the requirements of the certificate documentation as applicable, in which such a
component part is used
3.2
repair
action to restore faulty equipment to its fully serviceable condition complying with the relevant
standard
NOTE The relevant standard means the standard to which the equipment was originally designed.
3.3
overhaul
action to restore to a fully serviceable condition equipment which has been in use or in
storage for a period of time but which is not faulty
3.4
maintenance
routine actions taken to preserve the fully serviceable condition of the installed equipment
(see Clause 1)
3.5
component part
an indivisible item
NOTE The assembly of such items may form equipment.
3.6
reclamation
means of repair involving, for example, the removal or addition of material to reclaim
component parts which have sustained damage, in order to restore such parts to a
serviceable condition in accordance with the relevant standard
– 12 – 60079-19 Ó IEC:2010
NOTE The relevant standard means the standard to which the individual parts were originally manufactured.
3.7
modification
change to the design of the equipment which affects material, fit, form or function
NOTE As the certificate describes specific construction of the equipment, a modification of the equipment would
no longer comply with the construction described in the certificate documentation.
3.8
manufacturer
maker of the equipment (who may also be the supplier, the importer or the agent) in whose
name usually the certificate, where appropriate, of the equipment was registered
3.9
alteration
change to a product that results in an alternative construction that is described in the
certificate documentation
3.10
user
user of the equipment
3.11
repair facility
facility providing a service that consists of repairs, overhauls, or reclamations of explosion-
protected equipment who may be the manufacturer, the user or a third party (repair agency)
3.12
certificate
document that assures the conformity of a product, process, system, person, or organization
with specified requirements
NOTE The certificate may be either the supplier’s declaration of conformity or the purchaser’s recognition of
conformity or certification (as a result of action by a third party) as defined in ISO/IEC 17000.
3.13
certificate references
a certificate reference number may refer to a single design or a range of equipment of similar
design
3.14
symbol "X"
symbol used to denote specific conditions of use
NOTE The symbol “X” is used to provide a means of identifying that essential information for the installation, use,
and maintenance of the equipment is contained within the certificate. Therefore, the certificate documents should
be studied before such equipment is installed, repaired, overhauled, reclaimed, altered or modified.
3.15
copy winding
process by which a winding is totally or partially replaced by another, the characteristics and
properties of which are at least as good as those of the original
3.16
flameproof enclosure “d”
enclosure in which parts which can ignite an explosive atmosphere are placed and which can
withstand the pressure developed during an internal explosion of an explosive mixture and
which prevents the transmission of the explosion to the explosive atmosphere surrounding the
enclosure
60079-19 Ó IEC:2010 – 13 –
3.17
type of protection “i”
type of protection based on the restriction of electrical energy within apparatus and of
interconnecting wiring exposed to the potentially explosive gas atmosphere to a level below
that which can cause ignition by either sparking or heating effects
3.18
type of protection “p”
technique of guarding against the ingress of the external atmosphere into an enclosure by
maintaining a protective gas therein at a pressure above that of the external atmosphere
3.19
type of protection “e”
type of protection applied to electrical apparatus in which additional measures are applied so
as to give increased security against the possibility of excessive temperatures and of the
occurrence of arcs and sparks in normal service or under specified abnormal conditions
3.20
type of protection “n”
type of protection applied to the electrical equipment such that, in normal operation and in
certain specified regular expected occurrences, it is not capable of igniting the surrounding
explosive gas atmosphere
3.21
type of protection “tD” or Group III “t”
type of protection for explosive dust atmospheres where electrical equipment is provided with
an enclosure providing dust ingress protection and a means to limit surfac
...
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