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SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 125:2010+A1:2016
Naprave za nadzor plamena pri plinskih aparatih - Termoelektrična varovala
Flame supervision devices for gas burning appliances - Thermoelectric flame supervision
devices
Flammenüberwachungseinrichtungen für Gasgeräte - Thermoelektrische
Zündsicherungen
Dispositifs de surveillance de flamme pour appareils à gaz - Dispositifs
thermoélectriques de surveillance de flamme
Ta slovenski standard je istoveten z: EN 125:2022
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 125
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 27.060.20 Supersedes EN 125:2010+A1:2015
English Version
Flame supervision devices for gas burning appliances -
Thermoelectric flame supervision devices
Dispositifs de surveillance de flamme pour appareils à Flammenüberwachungseinrichtungen für Gasgeräte -
gaz - Dispositifs thermoélectriques de surveillance de Thermoelektrische Zündsicherungen
flamme
This European Standard was approved by CEN on 8 August 2022.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 125:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Classification . 8
4.1 Classes of control . 8
4.2 Groups of control . 8
4.3 Classes of control functions . 8
4.4 Types of DC supplied controls . 8
5 Test conditions and uncertainty of measurements . 8
6 Design and construction . 9
6.1 General . 9
6.2 Mechanical parts of the control . 9
6.3 Materials . 9
6.4 Gas connections . 10
6.5 Electronic parts of the control . 10
6.6 Protection against internal faults for the purpose of functional safety . 11
7 Performance . 11
7.1 General . 11
7.2 Leak-tightness . 11
7.3 Torsion and bending . 12
7.4 Rated flow rate . 12
7.5 Durability . 13
7.6 Performance tests for electronic controls . 13
7.7 Long-term performance for electronic controls . 13
7.8 Data exchange . 13
7.101 Operating torque and force . 13
7.102 Interlocks . 14
7.103 Closing current . 14
7.104 Sealing force . 15
7.105 Endurance . 16
8 EMC/Electrical requirements . 17
9 Electromagnetic compatibility (EMC) . 17
10 Marking, instructions . 17
10.1 Marking . 17
10.2 Instructions . 17
10.3 Warning notice . 18
Annex A (informative) Abbreviations and Symbols . 19
Annex B (informative) Leak-tightness test for gas controls − volumetric method . 20
Annex C (informative) Leak-tightness test − pressure loss method . 21
Annex D (normative) Calculation of pressure loss into leakage rate . 22
Annex E (normative) Electrical/electronic component fault modes . 23
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in EU Directive 2014/68/EU. 24
Annex G (normative) Materials for pressurized parts . 25
Annex H (normative) Additional materials for pressurized parts . 26
Annex I (normative) Requirements for controls used in DC supplied burners and burning
gaseous or liquid fuels appliances . 27
Annex J (normative) Method for the determination of the Safety Integrity Level (SIL) . 28
Annex K (normative) Method for the determination of a Performance Level (PL) . 29
Annex L (informative) Relationship between Safety Integrity Level (SIL) and
Performance Level (PL) . 30
Annex M (normative) Reset functions . 31
Annex N (informative) Guidance document on Environmental Aspects . 32
Annex O (normative) Seals of elastomers, cork and synthetic fibre mixtures . 33
Annex AA (informative) Types of flame supervision devices . 34
Bibliography . 39
European foreword
This document (EN 125:2022) has been prepared by Technical Committee CEN/TC 58 “Safety and control
devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is held by
BSI.
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 April 2023, and conflicting national standards shall be
withdrawn at the latest by October 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 125:2010+A1:2015.
The following significant changes compared to the previous edition have been incorporated in this
document:
a) alignment with EN 13611:2019;
b) requirements from EU Directive 2014/68/EU were not adopted;
c) terms and definitions are aligned with EN 13611:2019;
d) reference to EN 437 removed;
e) clarification regarding sealing forces in the same and opposite direction of closing member.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
This document is intended to be used in conjunction with EN 13611:2019.
EN 13611:2019 recognizes the safety level specified by CEN/TC 58 and is regarded as a horizontal
standard dealing with the safety, construction, performance and testing of controls for burners and
appliances burning gaseous and/or liquid fuels.
The general requirements for controls are given in EN 13611:2019, and methods for classification and
assessment for new controls and control functions are given in EN 14459:2021 (see Figure 1).
EN 126:2012 (see Figure 1) specifies multifunctional controls combining two or more controls and
Application Control Functions, one of which is a mechanical control function. The requirements for
controls and Application Control Functions are given in the specific control standard (see Figure 1,
control functions).
Figure 1 — Interrelation of control standards
EN 13611:2019 should be used in conjunction with the specific standard for a specific type of control (e.g.
EN 88-1:2022, EN 88-2:202
...