IEC 60079-19:2010/AMD1:2015
(Amendment)Amendment 1 - Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
Amendment 1 - Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
Defines the distribution line message specification (DLMS) within the OSI application layer.
This publication is of high relevance for Smart Grid.
Amendement 1 - Atmosphères explosives - Partie 19: Réparation, révision et remise en état de l'appareil
Définit la spécification des messages de ligne de distribution (DLMS) au sein de la couche application de l'OSI.
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Standards Content (Sample)
IEC 60079-19 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Explosive atmospheres –
Part 19: Equipment repair, overhaul and reclamation
Atmosphères explosives –
Partie 19: Réparation, révision et remise en état de l’appareil
IEC 60079-19:2010-11/AMD1:2015-03(en-fr)
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IEC 60079-19 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
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 978-2-8322-2433-5
– 2 – IEC 60079-19:2010/AMD1:2015
© IEC 2015
FOREWORD
This amendment has been prepared by subcommittee 31J: Classification of hazardous areas
and installation requirements, of IEC technical committee 31: Explosive atmospheres.
The text of this amendment is based on the following documents:
FDIS Report on voting
31J/249/FDIS 31J/250/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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• withdrawn,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.
_____________
2 Normative references
Add, after "IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased
safety "e"" the following new references:
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"
Replace "IEC 60079-15, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"" with the following new references:
IEC 60079-15:2005, Electrical apparatus for explosive gas atmospheres – Part 15:
Construction, test and marking of type of protection "n" electrical apparatus
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"
8.2.4 Insulation
Replace the existing text of Subclause 8.2.4 by the following new text:
© IEC 2015
Comprehensive details of the insulation system of windings, including the type of
impregnation varnish, are normally included in the certificate documentation. Where this does
not apply, full information shall be sought from the manufacturer or determined by detailed
inspection of the original winding.
8.2.6.1 General
Replace the existing text of Subclause 8.2.6.1 by the following new text:
The electrical construction of Type of Protection "e" equipment decisively influences the
explosion safety and the repairer shall be in full possession of the necessary information and
equipment. The whole of the winding shall be restored to the original condition except that a
partial winding replacement may be possible on larger equipment where this may be
practicable.
Replace the existing title and text of Subclause 8.2.6.1.1 by the following new text:
8.2.6.1.1 For machines with a rated voltage of 1 000 V or less; machines evaluated to
IEC 60079-7:1969, 1990 or 2001:
The following repair techniques are acceptable:
• stator windings replaced with those provided by the manufacturer;
• stator windings replaced based on manufacturer’s winding data;
• copy winding techniques;
The following winding data are required to be able to repair the stator winding and maintain
the original t :
E
a) type of winding – for example, single-layer, double-layer, etc.;
b) winding diagram;
c) number of turns/conductors/slot, parallel paths per phase;
d) interphase connections;
e) conductor size;
f) insulation system, including slot insulation and the generic varnish system or process such
as VPI or trickle;
g) measurement or calculation of resistance/phase or between terminals.
h) coil pitch
i) winding projection, including clearance between coils and enclosure
NOTE 1 Converter-fed motors are not protected using the concept of t , but are protected either with embedded
E
temperature sensors or by the inherent design of the converter.
Where copy rewind techniques are being used, all of the following are required:
a) Where there is a risk of damaging the core when stripping out the old winding, a core flux
test shall be conducted, at an appropriate value, such as 1,5 T (50 Hz) or 1,32 T (60 Hz),
before and after stripping winding to verify condition of core. The core losses after
stripping shall be no greater than 110 % of the core losses before stripping.
b) Removal of stator winding shall be by use of chemical stripping, controlled pyrololysis
(temperature controlled burn out) where the stator temperature does not exceed 370 °C or
cold stripping process.
c) The cross section area of the conductor shall be no less than the cross section area of the
original winding and not greater than 103 % of the cross section area of the original
winding.
– 4 – IEC 60079-19:2010/AMD1:2015
© IEC 2015
d) The type of winding used on the original winding shall be used for the rewind – for
example, single-layer, double-layer, lap, concentric, etc.
e) The number of conductors/slot, and parallel paths per phase shall be as in the original
winding.
f) The mean length turn of the coil shall be no greater than the original winding coil or
preferably reduced.
g) The stator winding projection shall be the same as the original winding.
h) Embedded temperature sensors shall be fitted in the same location as the temperature
sensors in the original winding.
i) The generic varnish system process shall be the same as used in the original winding,
such as trickle epoxy resin, solvent free resin using VPI, or triple dip with pre-heating and
cure in resin with solvent
j) After impregnation but before curing, the stator bore shall be cleaned. This is in order to
minimise the need for stator bore cleaning after the stator winding is cured, which can
increase stray losses.
k) The resistance/phase or between terminals shall be within ± 5 % of the original winding.
NOTE 2 The EASA/AEMT Rewind Study titled The Effects of Repair/Rewinding on Motor Efficiency published by
EASA & AEMT provides additional information on Best Practice during rewinding & repair. This document is
available as a free download from www.easa.com or www.iecex.com.
Replace the existing title and text of Subclause 8.2.6.1.2 by the following new text:
8.2.6.1.2 For machines with a rated voltage of greater than 1 000 V; machines
evaluated to IEC 60079-7:1990 or 2001:
In addition to the revised requirements of 8.2.6.1.1:
Unless the insulation system has been previously subjected to the stator incendivity tests of
IEC 60079-7:1990 or 2001, the complete motor windings shall be subjected to the stator
incendivity tests of IEC 60079-7:1990 or 2001, as applicable.
NOTE 1 Equipment evaluated against the requirements of IEC 60079-7:1969 or 1990 was not subjected to
additional requirements for high-voltage machines. These machines, if returned to original condition, will likely only
comply with the requirements of the standard to which they were originally evaluated.
NOTE 2 Additional information on the evaluation of stator windings and insulation systems based on the IECEx
Decision Sheet DS2013/006 (available from www.iecex.com) can be found in Annex D.
9.2.6.1 General
Replace the existing text of Subclause 9.2.6.1 by the following new text:
The electrical construction of type of protection "n" equipment decisively influences the
explosion safety and the repairer shall be in full possession of the necessary information and
equipment. The whole of the winding shall be restored to the original condition except that a
partial winding replacement may be possible on larger equipment where this may be
practicable.
For machines evaluated to IEC 60079-15:1987 or 2001, one of the following repair options
shall be employed:
• stator windings replaced with those provided by the manufacturer;
• repair based on manufacturer’s winding data;
• copy winding technique, which includes determination of winding connections, conductor
size, turns, coil pitch, winding projection, and may include a determination of the original
coil resistance.
...
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