EN IEC 63341-1:2025

SLOVENSKI STANDARD
01-marec-2026
Železniške naprave - Vodikovi sistemi in sistemi gorivnih celic za tirna vozila - 1.
del: Sistem napajanja z gorivnimi celicami
Railway applications - Hydrogen and fuel cell systems for rolling stock - Part 1: Fuel cell
power system
Bahnanwendungen - Fahrzeuge - Antriebe mit Brennstoffzellen-Energiesystemen - Teil
1: Brennstoffzellen-Energiesystem
Applications ferroviaires – Systèmes à hydrogène et à pile à combustible pour le matériel
roulant – Partie 1: Système à pile à combustible
Ta slovenski standard je istoveten z: EN IEC 63341-1:2025
ICS:
27.070 Gorilne celice Fuel cells
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63341-1

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2025
ICS 45.060.01; 27.070
English Version
Railway applications - Hydrogen and fuel cell systems for rolling
stock - Part 1: Fuel cell power system
(IEC 63341-1:2025)
Applications ferroviaires - Systèmes à hydrogène et à pile à Bahnanwendungen - Wasserstoff- und Brennstoffzellen-
combustible pour le matériel roulant - Partie 1: Système à Energiesysteme für Bahnfahrzeuge - Teil 1:
pile à combustible Brennstoffzellen-Energiesystem
(IEC 63341-1:2025) (IEC 63341-1:2025)
This European Standard was approved by CENELEC on 2025-11-14. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63341-1:2025 E

European foreword
The text of document 9/3212/FDIS, future edition 1 of IEC 63341-1, prepared by TC 9 "Electrical
equipment and systems for railways" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN IEC 63341-1:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-11-30
document have to be withdrawn
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63341-1:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60349-2 NOTE Approved as EN 60349-2
IEC 60349-4 NOTE Approved as EN 60349-4
IEC 60751 NOTE Approved as EN IEC 60751
IEC 60812 NOTE Approved as EN IEC 60812
IEC 61133 NOTE Approved as EN IEC 61133
IEC 61287-1 NOTE Approved as EN 61287-1
IEC 61377 NOTE Approved as EN 61377
IEC 61508 (series) NOTE Approved as EN 61508 (series)
IEC 61881-3 NOTE Approved as EN 61881-3
IEC 61882 NOTE Approved as EN 61882
IEC 62864-1:2016 NOTE Approved as EN 62864-1:2016 (not modified)
IEC 62928 NOTE Approved as EN IEC 62928
Approved as prEN IEC 62973-1:2025 (not modified) to be
IEC 62973-1:2018 NOTE
published
ISO 9223 NOTE Approved as EN ISO 9223
ISO 9614-1 NOTE Approved as EN ISO 9614-1
ISO 9614-2 NOTE Approved as EN ISO 9614-2
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  Where 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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-14 - Rotating electrical machines - Part 14: EN IEC 60034-14 -
Mechanical vibration of certain machines
with shaft heights 56 mm and higher -
Measurement, evaluation and limits of
vibration severity
IEC 60077-1 - Railway applications - Electric equipment EN 60077-1 -
for rolling stock - Part 1: General service
conditions and general rules
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 60571 - Railway applications - Electronic - -
equipment used on rolling stock
IEC 60617 - Standard data element types with - -
associated classification scheme for
electric components - Part 4: IEC reference
collection of standard data element types
and component classes
IEC 61373 - Railway applications - Rolling stock EN 61373 -
equipment - Shock and vibration tests
IEC 61709 - Electric components - Reliability - EN 61709 -
Reference conditions of failure rates and
stress models for conversion
IEC 61991 - Railway applications - Rolling stock - - -
Protective provisions against electrical
hazards
IEC 62236-3-2 - Railway applications - Electromagnetic - -
compatibility -- Part 3-2: Rolling stock -
Apparatus
IEC 62282-2-100 2020 Fuel cell technologies - Part 2-100: Fuel EN IEC 62282-2- 2020
cell modules - Safety 100
IEC 62282-3-100 2019 Fuel cell technologies - Part 3-100: EN IEC 62282-3- 2020
Stationary fuel cell power systems - Safety 100
IEC 62282-4-101 2022 Fuel cell technologies - Part 4-101: Fuel EN IEC 62282-4- 2022
cell power systems for electrically powered 101
industrial trucks - Safety
IEC 62497-1 - Railway applications - Insulation - -
coordination - Part 1: Basic requirements -
Clearances and creepage distances for all
electrical and electronic equipment
IEC 62498-1 2010 Railway applications - Environmental - -
conditions for equipment - Part 1:
Equipment on board rolling stock
IEC 62635 - Assessment of material recoverability rate EN IEC 62635 -
of products
IEC 63341-3 2025 Railway applications - Fuel cell systems for EN IEC 63341-3 —
rolling stock - Part 3: Performance test
methods for fuel cell power system
IEC 61375-1 - Electronic railway equipment - Train EN 61375-1 -
communication network (TCN) - Part 1:
General architecture
ISO 3744 - Acoustics - Determination of sound power EN ISO 3744 -
levels and sound energy levels of noise
sources using sound pressure -
Engineering methods for an essentially
free field over a reflecting plane
ISO 3746 - Acoustics - Determination of sound power EN ISO 3746 -
levels and sound energy levels of noise
sources using sound pressure - Survey
method using an enveloping measurement
surface over a reflecting plane
ISO 7010 - Graphical symbols - Safety colours and EN ISO 7010 -
safety signs - Registered safety signs
ISO 9227 - Corrosion tests in artificial atmospheres - EN ISO 9227 -
Salt spray tests
ISO 14687 - Hydrogen fuel quality - Product - -
specification
ISO 21106 - Railway applications - Recyclability and - -
recoverability calculation method for rolling
stock
ISO 23828 - Fuel cell road vehicles - Energy - -
consumption measurement - Vehicles
fuelled with compressed hydrogen

Under preparation. Stage at the time of publication: prEN IEC 62635:2025.
Under preparation. Stage at the time of publication: FprEN IEC 63341-3:2025.
IEC 63341-1 ®
Edition 1.0 2025-10
INTERNATIONAL
STANDARD
Railway applications - Hydrogen and fuel cell systems for rolling stock -
Part 1: Fuel cell power system
ICS 45.060.01; 27.070 ISBN 978-2-8327-0719-7

IEC 63341-1:2025-10(en)
IEC 63341-1:2025 © IEC 2025
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 11
3.1 Terms and definitions. 11
3.2 Abbreviated terms . 22
4 Configuration of the fuel cell power system . 22
4.1 Fuel cell power system definition . 22
4.2 Subsystems of the fuel cell power system . 23
4.3 FCPS power distribution . 23
4.4 Typical state of a fuel cell power system . 24
5 Environmental requirements . 24
5.1 General . 24
5.2 Specific use case . 25
5.2.1 Rooftop installation . 25
5.2.2 Tunnel . 25
5.2.3 Performance limitation at low and high ambient temperature . 26
5.2.4 Performance limitation at high altitude . 26
6 Interface requirements . 26
6.1 General . 26
6.2 Fluidic interfaces. 27
6.2.1 Fuel supply . 27
6.2.2 Oxidant supply . 27
6.2.3 Coolant . 27
6.2.4 Air inlets . 27
6.2.5 Exhaust . 28
6.3 Electrical interfaces . 28
6.3.1 General . 28
6.3.2 Main power interface . 28
6.3.3 Auxiliary supply and communication interfaces . 29
7 Performance requirements . 29
7.1 General . 29
7.2 Fuel cell power system sizing . 29
7.3 Load profile . 30
7.4 Operational requirements . 30
7.4.1 Normal mode requirements . 30
7.4.2 Degraded mode requirements . 30
7.5 Electric efficiency and hydrogen consumption calculations . 30
7.6 Lifetime requirements . 31
7.7 End-of-life performance . 31
7.8 Voltage stability . 32
8 Design requirements. 32
8.1 General . 32
8.2 FCPM requirements . 32
8.3 FMS requirements . 32
IEC 63341-1:2025 © IEC 2025
8.3.1 Design requirement . 32
8.3.2 Functional requirement . 34
8.4 OMS requirements . 34
8.4.1 General . 34
8.4.2 Non-metallic piping . 34
8.4.3 Overpressure . 34
8.4.4 Oxidant quality and filtering device . 34
8.5 TMS requirements . 35
8.5.1 Design requirements . 35
8.5.2 Functional requirements . 36
8.6 ExMS requirements . 37
8.6.1 Hydrogen release . 37
8.6.2 Waste water . 37
8.7 EPMS requirements . 37
8.7.1 General . 37
8.7.2 Cabling . 37
8.7.3 Ripple current . 37
8.7.4 Electric power input . 38
8.7.5 Auxiliary motors . 38
8.7.6 Light maintenance operation . 38
8.8 MCS requirements . 38
8.8.1 Hardware . 38
8.8.2 Software . 38
8.9 Mechanical requirements . 39
8.9.1 Mechanical integration . 39
8.9.2 Mechanical design . 39
8.9.3 Bolted assemblies . 39
8.9.4 Degree of protection . 40
8.9.5 Shock and vibration . 40
8.10 Recyclability requirements . 40
8.11 Documentation . 40
8.12 Other . 41
8.12.1 Noise emission requirements . 41
8.12.2 EMC requirements . 42
9 Safety, reliability and protection requirements . 42
9.1 Reliability . 42
9.2 Safety . 42
9.2.1 Safety analysis . 42
9.2.2 Hazard identification . 43
9.2.3 Prevention for maintenance operation and storage . 43
9.2.4 Hydrogen risk management . 44
9.2.5 Fire, smoke, flammability . 45
9.2.6 Electrical shock . 45
9.2.7 Software . 45
10 Marking and labelling. 46
10.1 Safety signs . 46
10.1.1 FCPS enclosure . 46
10.1.2 Other places inside the FCPS enclosure . 46
10.2 Nameplate . 46
IEC 63341-1:2025 © IEC 2025
10.2.1 FCPS enclosure . 46
10.2.2 Nameplates on sub-assemblies inside the box . 47
11 Installation and maintenance . 47
11.1 General . 47
11.2 Installation . 47
11.3 Maintenance . 47
11.3.1 General . 47
11.3.2 Maintenance accessibility . 47
11.3.3 Technical documentation . 47
12 FCPS storage and transportation conditions . 49
12.1 General . 49
12.2 Transportation . 49
12.3 Storage . 49
13 Testing . 49
13.1 General . 49
13.2 Parameter measurements . 49
13.3 Parameter measurement tolerances . 49
13.4 Reference conditions of tests . 50
13.4.1 Installation and operating conditions of the system . 50
13.4.2 Quality of hydrogen . 50
13.4.3 Quality of power input . 50
13.5 Type test. 50
13.5.1 General . 50
13.5.2 Visual checks . 50
13.5.3 Mass . 50
13.5.4 Communication network test . 50
13.5.5 Dielectric voltage strength test . 51
13.5.6 Insulation impedance (optional) . 51
13.5.7 Sub-equipment functional tests (optional) . 51
13.5.8 Operating test for stabilized operations . 51
13.5.9 Operating test for dynamic operations . 51
13.5.10 Polarization curve test . 51
13.5.11 Load profile test . 51
13.5.12 Hydrogen leakage test . 52
13.5.13 Ultimate strength pressure test . 52
13.5.14 Flammable concentration test . 52
13.5.15 Thermal rising test . 52
13.5.16 Endurance test (optional) . 52
13.5.17 Safety test in abnormal conditions . 53
13.5.18 Hydrogen emissions . 53
13.5.19 Environmental tests . 53
13.5.20 Acoustic noise emissions . 54
13.5.21 EMC test . 55
13.5.22 Type tests at component level (optional) . 55
13.6 Routine test . 55
13.6.1 Visual checks . 55
13.6.2 Communication network test . 55
13.6.3 Dielectric test . 55
13.6.4 Insulation impedance test (optional) . 55
IEC 63341-1:2025 © IEC 2025
13.6.5 Normal operation test . 55
13.6.6 Hydrogen leakage test . 56
13.6.7 Overpressure test . 56
Annex A (informative) Datasheet template . 57
Annex B (informative) Local laws, regulations and standards applicable . 60
B.1 Europe . 60
B.2 Japan . 61
B.3 China . 61
Bibliography . 62

Figure 1 – Hierarchy of standards related to IEC 63341 . 8
Figure 2 – Example of the main block diagrams for a fuel cell power system for railway
applications . 23
Figure 3 – FCPS power distribution . 24
Figure 4 – Typical state diagram for the FCPS . 24

Table A.1 – Datasheet template proposal. 57

IEC 63341-1:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Railway applications -
Hydrogen and fuel cell systems for rolling stock -
Part 1: Fuel cell power system

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63341-1 has been prepared by IEC technical committee 9: Electrical equipment and
systems for railways. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
9/3212/FDIS 9/3254/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
IEC 63341-1:2025 © IEC 2025
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63341 series, published under the general title Railway
applications – Hydrogen and fuel cell systems for rolling stock, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 63341-1:2025 © IEC 2025
INTRODUCTION
This document considers general requirements for all fuel cell power systems installed onboard
rolling stock for railway applications.
IEC TC 105 is developing the IEC 62282 series, covering generic fuel cell technologies in
different industrial sectors:
– IEC 62282-2 series on fuel cell modules;
– IEC 62282-3 series on stationary fuel cell power systems;
– IEC 62282-4 series on fuel cell power systems for propulsion and auxiliary power units
These documents are often generic and do not cover the specific requirements for railway
applications.
Therefore, this document has been developed to specify the requirements for railway
applications.
This document is linked to IEC 63341-3, which specifies the performance test method to
validate the fuel cell power system performance.
This document with the other parts is used in conjunction with other related IEC standards for
auxiliary equipment used for railway rolling stock applications. In addition, IEC TC 9 has
developed the following standards for the subsystems, which are related or have interfaces to
the fuel cell power system:
• IEC 62864-1:2016, Railway applications - Rolling stock - Power supply with onboard energy
storage system - Part 1: Series hybrid system
• IEC 61287-1, Railway applications - Power converters installed on board rolling stock -
Part 1: Characteristics and test methods
• IEC 60349 (all parts), Electric traction - Rotating electrical machines for rail and road
vehicles
• IEC 62928, Railway applications - Rolling stock - Onboard lithium-ion traction batteries
IEC 62864-1:2016 specifies the general requirements for the onboard energy storage system
as a system level. The hierarchy of standards is shown in Figure 1. The list is not exhaustive.
IEC 63341-1:2025 © IEC 2025
Figure 1 – Hierarchy of standards related to IEC 63341

IEC 63341-1:2025 © IEC 2025
1 Scope
This part of IEC 63341 applies to fuel cell power systems installed onboard rolling stock for
railway applications (e.g. light rail vehicles, tramways, streetcars, metros, commuter trains,
regional trains, high speed trains, locomotives). Fuel cell power systems specified in this
document are used for the traction power and the auxiliary supply of railway vehicles such as
hybrid vehicles, and in case of use as an auxiliary onboard power source.
This document applies to the fuel cell technology called proton exchange membrane fuel cell
(PEMFC), with the use of hydrogen as fuel source and the use of air as oxidant source.
This document does not apply for hydrogen fuel system which is specified in IEC 63341-2, as
HFS is not within the scope of this document.
This document does not apply for power conversion equipment which is specified in
IEC 61287-1 and is not within the scope this document.
This document specifies:
– the scope of supply and the description of the interfaces (fluidic, electrical, thermal and
mechanical) of the fuel cell power system;
– the description of the environmental conditions;
– the specification and description of all the requirements to ensure the fuel cell power system
conformance with a railway application;
– the process to validate the fuel cell power system sizing required for a specific load profile;
– the safety, reliability and protection requirements to design the fuel cell power system for a
railway application;
– the marking and labelling requirements;
– the requirements related to storage, transportation, installation and maintenance;
– the tests (type, routine and investigation) required to validate the fuel cell power system.
2 Normative references
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.
IEC 60034-14, Rotating electrical machines - Part 14: Mechanical vibration of certain machines
with shaft heights 56 mm and higher - Measurement, evaluation and limits of vibration severity
IEC 60077-1, Railway applications - Electric equipment for rolling stock - Part 1: General service
conditions and general rules
IEC 60529, Degrees of protection provided by enclosures (IP Code)
___________
1 PEM fuel cells are typically limited to less than 120 °C due to stability of the membrane and evaporation of water.
More practically, they are limited to 85 °C to 90 °C in high or peak temperature application to limit the
electrochemical degradations and preserve their lifetime.
Because of the thin membrane, and low resistance losses, PEM fuel cells tend to deliver high power density and
offer the advantages of low mass and volume, compared to other fuel cell types. The low temperature operation
also allows them to start quickly (less warm-up time) and to start from freeze condition, which makes them
particularly well suited for transportation applications.
IEC 63341-1:2025 © IEC 2025
IEC 60571, Railway applications - Electronic equipment used on rolling stock
IEC 60617, Graphical symbols for diagrams, available at http://std.iec.ch/iec60617
IEC 61373, Railway applications - Rolling stock equipment - Shock and vibration tests
IEC 61709, Electric components - Reliability - Reference conditions of failure rates and stress
models for conversion
IEC 61991, Railway applications - Rolling stock - Protective provisions against electrical
hazards
IEC 62236-3-2, Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock -
Apparatus
IEC 62282-2-100:2020, Fuel cell technologies - Part 2-100: Fuel cell modules - Safety
IEC 62282-3-100:2019, Fuel cell technologies - Part 3-100: Stationary fuel cell power systems
- Safety
IEC 62282-4-101:2022, Fuel cell technologies - Part 4-101: Fuel cell power systems for
electrically powered industrial trucks - Safety
IEC 62497-1, Railway applications - Insulation coordination - Part 1: Basic requirements -
Clearances and creepage distances for all electrical and electronic equipment
IEC 62498-1:2010, Railway applications - Environmental conditions for equipment - Part 1:
Equipment on board rolling stock
IEC 62635, Guidelines for end-of-life information provided by manufacturers and recyclers and
for recyclability rate calculation of electrical and electronic equipment
IEC 63341-3:2025, Railway applications - Hydrogen and fuel cell systems for rolling stock -
Part 3: Performance test methods for fuel cell power system
IEC 61375-1, Electronic railway equipment - Train communication network (TCN) - Part 1:
General architecture
ISO 3744, Acoustics - Determination of sound power levels and sound energy levels of noise
sources using sound pressure - Engineering methods for an essentially free field over a
reflecting plane
ISO 3746, Acoustics - Determination of sound power levels and sound energy levels of noise
sources using sound pressure - Survey method using an enveloping measurement surface over
a reflecting plane
ISO 7010, Graphical symbols - Safety colours and safety signs - Registered safety signs,
available at https://www.iso.org/obp
ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests
ISO 14687, Hydrogen fuel quality - Product specification
ISO 21106, Railway applications - Recyclability and recoverability calculation method for rolling
stock
IEC 63341-1:2025 © IEC 2025
ISO 23828, Fuel cell road vehicles - Energy consumption measurement - Vehicles fuelled with
compressed hydrogen
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1 Terms and definitions
3.1.1
fuel cell power system
FCPS
generator system that uses one or more fuel cell power modules to generate electric power and
heat
Note 1 to entry: The fuel cell power system typically includes the following subsystems: fuel cell power module,
oxidant management system, fuel management system, thermal management system, exhaust management system,
electrical and power management system, and their monitoring and control system.
[SOURCE: IEC 60050-485:2020, 485-09-01, modified – In the definition, "fuel cell modules" has
been replaced with "fuel cell power modules". Note 1 to entry has been added.]
3.1.2
fuel cell stack
FCS
equipment assembly of two or more cells, separators, cooling plates, manifolds and a support
structure that electrochemically converts, typically, hydrogen rich gas and air reactants to
electric power, heat and other reactant bi-products
[SOURCE: IEC 60050-485:2020, 485-06-01, modified – In the definition, "equipment", "two or
more", and "bi-" have been added, "supporting" has been replaced with "support", "hydrogen-
rich" has been replaced with "hydrogen rich", "DC" has been replaced with "electric", and
"reaction" has been replaced with "reactant".]
3.1.3
fuel cell
FC
electrochemical device that converts the chemical energy of a fuel and
an oxidant to electrical energy (DC power), heat and reaction products
Note 1 to entry: The fuel and oxidant are typically stored outside of the fuel
...