SIST-TS CLC IEC/TS 60079-39:2020
(Main)Explosive atmospheres - Part 39: Intrinsically safe systems with electronically controlled spark duration limitation (IEC/TS 60079-39:2015)
Explosive atmospheres - Part 39: Intrinsically safe systems with electronically controlled spark duration limitation (IEC/TS 60079-39:2015)
This Technical Specification specifies the construction, testing, installation and maintenance of Power i apparatus and systems which utilise electronically controlled spark duration limitation to maintain an adequate level of intrinsic safety.
This Technical Specification contains requirements for intrinsically safe apparatus and wiring intended for use in explosive atmospheres and for associated apparatus intended for connection to intrinsically safe circuits entering such atmospheres.
This Technical Specification excludes the level of protection “ia” and the use of software controlled circuits.
This Technical Specification applies to electrical equipment utilising voltages not
higher than 40 V d.c. and a safety factor 1,5 for Groups IIB, IIA, I and III. It is also applicable to Group IIC “ic” apparatus with a safety factor 1,0. Group IIC “ib” apparatus with a safety factor 1,5 are restricted to voltages up to 32 V d.c.
This type of protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing an explosion of the surrounding explosive atmospheres. This Technical Specification is applicable to intrinsically safe apparatus and systems which utilise electronically controlled spark duration limitation with the aim of providing more electrical power while maintaining an adequate level of safety. This Technical Specification is also applicable to electrical equipment or parts of electrical equipment located outside
hazardous areas or protected by another type of protection listed in the IEC 60079 series, where the intrinsic safety of the electrical circuits in explosive atmospheres depends on the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits located in the hazardous area are evaluated for use in such locations by applying his Technical Specification. This Technical Specification supplements and modifies the requirements of IEC 60079-0, IEC 60079-11, IEC 60079-14, IEC 60079-17 and IEC 60079-25.
Explosionsgefährdete Bereiche - Teil 39: Eigensichere Systeme mit elektronisch gesteuerter Begrenzung der Funkendauer (IEC/TS 60079-39:2015)
Atmosphères explosives - Partie 39 : Systèmes de sécurité intrinsèque à limite de la durée d'étincelle contrôlée électroniquement (IEC/TS 60079-39:2015)
Eksplozivne atmosfere - 39. del: Lastnovarni sistemi za elektronsko krmiljeno trajanje isker (IEC/TS 60079-39:2015)
Ta tehnična specifikacija določa konstrukcijo, preskušanje, namestitev ter vzdrževanje električnih naprav in sistemov i, ki uporabljajo elektronsko krmiljeno trajanje isker z namenom zagotavljanja ustrezne ravni lastne varnosti. Ta tehnična specifikacija vsebuje zahteve za lastnovarne naprave in napeljave, namenjene uporabi v eksplozivnih atmosferah, ter za povezane naprave, namenjene za povezavo z lastnovarnimi tokokrogi, ki vstopajo v take atmosfere. Ta tehnična specifikacija izključuje raven zaščite »ia« in uporabo tokokrogov, krmiljenih s programsko opremo. Ta tehnična specifikacija se uporablja za električno opremo, ki uporablja napetosti, ki niso višje od 40 V enosmerne napetosti, in varnostni faktor 1,5 za skupine IIB, IIA, I ter III. Uporablja se tudi za naprave skupine IIC »ic« z varnostnim faktorjem 1,0. Naprave skupine IIC »ib« z varnostnim faktorjem 1,5 so omejene na napetosti do 32 V enosmerne napetosti. Ta vrsta zaščite se uporablja za električno opremo, v kateri električni tokokrogi sami ne morejo povzročiti eksplozije v okoliških eksplozivnih atmosferah. Ta tehnična specifikacija se uporablja za lastnovarne naprave in sisteme, ki uporabljajo elektronsko krmiljeno trajanje isker s ciljem zagotoviti več električne moči ob hkratnem ohranjanju ustrezne ravni varnosti. Ta tehnična specifikacija se uporablja tudi za električno opremo ali dele električne opreme, ki so zunaj nevarnih območjih ali jih varuje še ena vrsta zaščite, navedena v skupini standardov IEC 60079, pri čemer je lahko lastna varnost električnih tokokrogov v eksplozivnih atmosferah odvisna od zasnove in konstrukcije take električne opreme ali delov take električne opreme. Električni tokokrogi v nevarnih območjih se za uporabo na takih mestih ocenjujejo na podlagi te tehnične specifikacije. Ta tehnična specifikacija dopolnjuje in spreminja zahteve standardov IEC 60079-0, IEC 60079-11, IEC 60079-14, IEC 60079-17 in IEC 60079-25.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CLC IEC/TS 60079-39:2020
01-januar-2020
Eksplozivne atmosfere - 39. del: Lastnovarni sistemi za elektronsko krmiljeno
trajanje isker (IEC/TS 60079-39:2015)
Explosive atmospheres - Part 39: Intrinsically safe systems with electronically controlled
spark duration limitation (IEC/TS 60079-39:2015)
Explosionsgefährdete Bereiche - Teil 39: Eigensichere Systeme mit elektronisch
gesteuerter Begrenzung der Funkendauer (IEC/TS 60079-39:2015)
Atmosphères explosives - Partie 39 : Systèmes de sécurité intrinsèque à limite de la
durée d'étincelle contrôlée électroniquement (IEC/TS 60079-39:2015)
Ta slovenski standard je istoveten z: CLC IEC/TS 60079-39:2019
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
SIST-TS CLC IEC/TS 60079-39:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS CLC IEC/TS 60079-39:2020
TECHNICAL SPECIFICATION CLC IEC/TS 60079-39
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
June 2019
ICS 29.260.20
English Version
Explosive atmospheres - Part 39: Intrinsically safe systems with
electronically controlled spark duration limitation
(IEC/TS 60079-39:2015)
Atmosphères explosives - Partie 39 : Systèmes de sécurité Explosionsgefährdete Bereiche - Teil 39: Eigensichere
intrinsèque à limite de la durée d'étincelle contrôlée Systeme mit elektronisch gesteuerter Begrenzung der
électroniquement Funkendauer
(IEC/TS 60079-39:2015) (IEC/TS 60079-39:2015)
This Technical Specification was approved by CENELEC on 2017-12-25.
CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC IEC/TS 60079-39:2019 E
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SIST-TS CLC IEC/TS 60079-39:2020
CLC IEC/TS 60079-39:2019 (E)
European foreword
This document (CLC IEC/TS 60079-39:2019) consists of the text of the IEC/TS 60079-
39:2015 prepared by IEC/TC 31 "Equipment for explosive atmospheres".
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CENELEC shall not be held responsible for identifying any or all
such patent rights.
Endorsement notice
The text of the International Standard IEC/TS 60079-39:2019 was approved by CENELEC
as a European Standard without any modification.
2
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SIST-TS CLC IEC/TS 60079-39:2020
CLC IEC/TS 60079-39:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60079-0 - Explosive atmospheres -- Part 0: Equipment EN 60079-0 -
- General requirements
IEC 60079-11 - Explosive atmospheres - Part 11: Equipment EN 60079-11 -
protection by intrinsic safety "i"
IEC 60079-14 - Explosive atmospheres - Part 14: Electrical EN 60079-14 -
installations design, selection and erection
IEC 60079-25 - Explosive atmospheres - Part 25: EN 60079-25 -
Intrinsically safe electrical systems
3
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SIST-TS CLC IEC/TS 60079-39:2020
IEC TS 60079-39
®
Edition 1.0 2015-06
TECHNICAL
SPECIFICATION
colour
inside
Explosive atmospheres –
Part 39: Intrinsically safe systems with electronically controlled spark duration
limitation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-2734-3
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references. 8
3 Definitions . 9
4 Power-i architecture . 10
5 Requirements for Power-i devices . 11
5.1 General . 11
5.2 Power-i source . 11
5.3 Power-i field device . 13
5.4 Power-i wiring . 14
5.5 Power-i terminator . 15
5.6 Test instruments for Power-i loop check . 15
5.7 Power-i application classes . 15
6 System requirements . 16
6.1 Selection of the permissible Power- i current class of the Power-i source . 16
6.2 Verification of a Power-i system . 17
7 Assessment and testing . 19
7.1 Procedure to define safety-relevant parameters . 19
7.2 Type test . 20
7.3 Routine test . 20
8 Marking of Power-i devices . 20
8.1 General . 20
8.2 Examples of marking . 20
9 Instructions. 21
Annex A (normative) Assessment of Power-i safety parameters . 22
A.1 General . 22
A.2 Power-i specific test equipment . 22
A.2.1 Power-i universal test equipment . 22
A.2.2 Power-i dummy load . 23
A.3 Determination of the safety-relevant parameters for Power-i devices and
Power-i wiring . 24
A.3.1 General . 24
A.3.2 Safety-relevant parameters for the Power-i source . 24
A.3.3 Safety-relevant parameters for the Power-i field devices . 31
A.3.4 Safety-relevant parameters for Power-i wiring . 34
A.3.5 Safety-relevant parameters for the Power-i terminator . 36
Annex B (informative) Explanation and details of the Power-i basic concept . 37
B.1 Physical basics of an ignition . 37
B.2 Output characteristics of a Power-i source . 39
B.3 Measurement and scientific results as basis for Power- i minimum ignition
values . 41
B.3.1 Test setups for the determination of the ignition probability . 41
B.3.2 Result of the spark ignition tests and their implementation in Table 3 . 43
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Annex C (informative) Examples of Power-i devices and systems . 46
C.1 Power-i application for a solenoid valve . 46
C.2 Example of a generally designed Power-i source . 47
C.3 Example of a Power-i field device . 47
C.4 Example of a Power-i dummy load . 48
C.5 Example of a Power-i terminator . 48
Annex D (informative) Example of interconnection of Power-i devices including
Power-i wiring to a Power-i system . 50
D.1 Specific aim and given values . 50
D.2 Solution example . 50
Figure 1 – The simplest Power-i architecture . 10
Figure 2 – Example of complex Power-i concept architecture . 11
Figure 3 – Elements of a Power-i source with voltage and current limitation . 12
Figure 4 – Example of a universal Power-i field device (basic structure) . 14
Figure 5 – Basic assessment procedure for a Power-i system . 19
Figure A.1 – Basic principle of the Power-i universal test equipment . 23
Figure A.2 – Pulse output between terminals 3 and 1 of Figure A.1 . 23
Figure A.3 – Basic principle of a Power-i dummy load . 24
Figure A.4 – Basic principle of the equipment for the determination of the response
time t . 25
resp-source
Figure A.5 – Example of an oscillogram to determine the response time t . 26
resp-source
Figure A.6 – Test equipment for the determination of the assessment factor AF
source
(basic principle) . 27
Figure A.7 – Test equipment for the assessment factor test for Power-i source . 28
Figure A.8 – Example of an oscillogram from a test of a Power-i source with an
assessment factor AF = 8,29 for a break spark . 29
Figure A.9 – Test equipment for transition pulse test of a Power-i source . 30
Figure A.10 – Test equipment for the determination of the assessment factor
AF for Power-i field devices (basic principle) . 32
field device
Figure A.11 – Test equipment for the transition pulse test of Power-i field devices . 33
Figure A.12 – Evaluation parameter of test pulse U for transition pulse test . 34
pulse
Figure A.13 – Test equipment for the determination of the response time of the Power-
i trunk t (basic principle) . 35
resp-trunk
Figure B.1 – Example of a typical trace of a break spark supplied with a linearly limited
source . 38
Figure B.2 – Example of a typical trace of a break spark limited by a Power-i source . 38
Figure B.3 – Example of output set of characteristic curves of a Power-i source during
load connection . 40
Figure B.4 – Basic principle of a Power-i power source for the voltage threshold return
mode . 41
Figure B.5 – Example of output set of characteristic curves of a Power-i source in the
case of a failure . 41
Figure B.6 – Test setup with STA for break sparks . 42
Figure B.7 – Test setup with STA for make sparks . 42
Figure B.8 – Power-i ignition values for voltage class 24V (24 VDC) . 43
Figure B.9 – Power-i ignition values for voltage class 32V (32 VDC) . 44
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Figure B.10 – Power-i ignition values for voltage class 40V (40 VDC) . 44
Figure B.11 – Ignition energy in relation to the used hydrogen percentage in the gas
mixtures . 45
Figure C.1 – Simple solenoid valve Power-i application (example) . 46
Figure C.2 – Example of a generally styled Power-i field device . 47
Figure C.3 – Example of a V-limitation unit (level of protection “ib”) . 48
Figure C.4 – Example of a Power-i dummy load . 48
Figure C.5 – Example of a Power-i terminator . 49
Table 1 – Definition of Power-i voltage classes . 16
Table 2 – Definition of Power-i current classes . 16
Table 3 – Permitted combinations of Power-i application classes for Power-i sources
as a function of the system response time for all Groups (n.a. = not allowed) . 17
Table 4 – Power-i current classes of Power-i field devices or Power-i terminators
matching the current class of the Power-i source . 18
Table 5 – Relevance for Power-i test procedures . 20
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IEC TS 60079-39:2015 © IEC 2015 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 39: Intrinsically safe systems with electronically
controlled spark duration limitation
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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 60079-39, which is a technical specification, has been prepared by subcommittee
31G: Intrinsically safe apparatus, of IEC technical committee 31: Equipment for explosive
atmospheres.
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The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
31G/236A/DTS 31G/242/RVC
Full information on the voting for the approval of this technical specification 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 in the IEC 60079 series, published 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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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.
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IEC TS 60079-39:2015 © IEC 2015 – 7 –
INTRODUCTION
This part of IEC 60079, which is a Technical Specification, is being issued as a “prospective
standard for provisional application” in the field of Explosive Atmospheres – Intrinsically safe
systems with electronically controlled spark duration limitation because there is an urgent
need for guidance on how standards in this field should be used to meet an identified need.
Intrinsically safe systems with electronically controlled spark duration can provide more power
available in intrinsically safe circuits while maintaining the level of protection “ib” or “ic”. In
addition to limiting the voltage and current (similar to conventional intrinsically safe circuits),
the duration of the spark is limited, which also restricts the amount of energy available for
ignition.
The general requirements for the installation of IS equipment are applicable to Power-i
circuits.
This new technology allows an expansion in the field of industrial applications using the type
of protection Intrinsic Safety ‘i.
This technology, however, requires a new and more extensive approach of the type of
protection Intrinsic Safety “i”.
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EXPLOSIVE ATMOSPHERES –
Part 39: Intrinsically safe systems with electronically
controlled spark duration limitation
1 Scope
This Technical Specification specifies the construction, testing, installation and maintenance
of Power-i apparatus and systems which utilise electronically controlled spark duration
limitation to maintain an adequate level of intrinsic safety.
This Technical Specification contains requirements for intrinsically safe apparatus and wiring
intended for use in explosive atmospheres and for associated apparatus intended for
connection to intrinsically safe circuits entering such atmospheres.
This Technical Specification excludes the level of protection “ia” and the use of software-
controlled circuits.
This Technical Specification applies to electrical equipment utilising voltages not higher than
40 V d.c. and a safety factor 1,5 for Groups IIB, IIA, I and III. It is also applicable to Group IIC
“ic” apparatus with a safety factor 1,0. Group IIC “ib” apparatus with a safety factor 1,5 are
restricted to voltages up to 32 V d.c.
This type of protection is applicable to electrical equipment in which the electrical circuits
themselves are incapable of causing an explosion of the surrounding explosive atmospheres.
This Technical Specification is applicable to intrinsically safe apparatus and systems which
utilise electronically controlled spark duration limitation with the aim of providing more
electrical power while maintaining an adequate level of safety.
This Technical Specification is also applicable to electrical equipment or parts of electrical
equipment located outside hazardous areas or protected by another type of protection listed
in the IEC 60079 series, where the intrinsic safety of the electrical circuits in explosive
atmospheres depends on the design and construction of such electrical equipment or parts of
such electrical equipment. The electrical circuits located in the hazardous area are evaluated
for use in such locations by applying this Technical Specification.
This Technical Specification supplements and modifies the requirements of IEC 60079-0,
IEC 60079-11, IEC 60079-14, IEC 60079-17 and IEC 60079-25.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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, Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-11, Explosive atmospheres – Part 11: Equipment protection by intrinsic safety "i"
IEC 60079-14, Explosive atmospheres – Part 14: Electrical installations design, selection and
erection
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IEC TS 60079-39:2015 © IEC 2015 – 9 –
IEC 60079-25, Explosive atmospheres – Part 25: Intrinsically safe electrical systems
3 Definitions
For the purpose of this document, the terms and definitions given in IEC 60079-0 and
IEC 60079-11, as well as the following apply.
3.1
Power-i
intrinsically safe concept where the level of protection is provided by voltage and current
limitation and additional electronically controlled spark duration limitation
Note 1 to entry: Power-i contains Power-i devices and Power-i wiring.
Note 2 to entry: Power-i encompasses electric circuits which in the Power-i mode operate with voltage and
current values which can exceed the values defined in IEC 60079-11.
3.2
Power-i device
Power-i source, Power-i field device(s) and (if applicable) Power-i terminator
3.3
Power-i terminator
unit to prevent reflections of voltage and current waves at the end of the Power-i wiring
Note 1 to entry: The Power-i terminator is only relevant where data transmission uses the Power-i wiring.
3.4
Power-i source
power supply for Power-i devices providing shutdown of power in case of faults
Note 1 to entry: Operating in two modes: Power-i mode and shutdown mode.
3.5
Power-i field device
device that is connected to one Power-i source via Power-i wiring
Note 1 to entry: Power-i field devices can have additional connections to other devices (e.g. loads).
3.6
Power-i mode
operating mode of the Power-i source delivering the rated Power-i output power
Note 1 to entry: In this mode the values of permitted voltage and current can exceed the values of curves and
tables stated in IEC 60079-11.
3.7
shutdown mode
operating mode of the Power-i source after a spark event has been detected
3.8
spark pulse
information resulting from a spark event in the Power-i system
Note 1 to entry: A distinction is made between the make spark pulse and the break spark pulse.
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3.9
Power-i response time
3.9
...
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