EN 50187:2022

SLOVENSKI STANDARD
01-januar-2023
Nadomešča:
SIST EN 50187:2001
Visokonapetostne stikalne in krmilne naprave - Plinske pregrade za stikalne in
krmilne naprave z izmeničnim tokom z naznačeno napetostjo nad 1 kV do vključno
52 kV
High-voltage switchgear and controlgear - Gas-filled compartments of AC switchgear and
controlgear with rated voltages above 1 kV up to and including 52 kV
Gasgefullte Schottraume für Wechselstrom-Schaltgerate und -Schaltanlagen mit
Nennspannungen über 1 kV bis einschliel3lich 52 kV
Appareillage à haute tension - Compartiments sous pression de gaz pour appareillage à
courant alternatif de tensions assignées supérieures à 1 kV et inférieures ou égales à 52
kV
Ta slovenski standard je istoveten z: EN 50187:2022
ICS:
29.130.99 Druge stikalne in krmilne Other switchgear and
naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50187
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2022
ICS 29.130.99 Supersedes EN 50187:1996/corrigendum Sep. 1996;
EN 50187:1996
English Version
High-voltage switchgear and controlgear - Gas-filled
compartments of AC switchgear and controlgear with rated
voltages above 1 kV up to and including 52 kV
Appareillage à haute tension - Compartiments sous Hochspannungs-Schaltgeräte und -Schaltanlagen -
pression de gaz pour appareillage à courant alternatif de Gasgefüllte Schotträume für Wechselstrom-Schaltgeräte
tensions assignées supérieures à 1 kV et inférieures ou und -Schaltanlagen mit Bemessungsspannungen über 1 kV
égales à 52 kV bis einschlielßlich 52 kV
This European Standard was approved by CENELEC on 2022-10-03. 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50187:2022 E
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Normal and special service conditions . 7
5 Design and construction . 7
5.1 General . 7
5.2 Materials . 7
5.3 Corrosion allowance . 7
5.4 Manholes and inspection openings . 7
5.5 Design pressure . 7
5.6 Design temperature . 7
5.7 Design . 8
5.7.1 General . 8
5.7.2 Calculation methods . 8
5.8 Pressure relief devices . 9
6 Manufacturing and workmanship . 9
7 Quality assurance . 9
8 Inspection and testing . 9
8.1 Type tests . 9
8.1.1 General . 9
8.1.2 Pressure withstand test for gas-filled compartments with pressure relief devices .10
8.1.3 Pressure withstand test for gas-filled compartments without pressure relief devices .10
8.2 Routine tests .11
9 Certification and marking .11
9.1 Design specification, drawings and data sheets.11
9.2 Certificates .11
9.3 Marking .11
9.4 Final Inspection .11
10 Transport .11
Annex A (informative) A-deviations .13
Bibliography .14

European foreword
This document (EN 50187:2022) has been prepared by CLC/TC17AC “High-voltage switchgear and
controlgear”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-10-03
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-10-03
conflicting with this document have to be
withdrawn
This document supersedes EN 50187:1996 and all its amendments and corrigenda (if any).
This edition includes the following significant technical changes with respect to EN 50187:1996:
▪ Consistency with EN IEC 62271-200:2021;
▪ Added references to quality standards for welding;
▪ Added Clause 10 on transport;
▪ Removal of the limitation on maximum product pressure x volume of 2 000 bar litres in the scope;
▪ Removal of the 300 kPa design pressure limitation;
▪ Extend scope to non-corrosive gases and gas mixtures in the conditions that prevail inside.
The present document has been established as an international specification for the design, construction,
testing and certification of pressurized compartments used in high-voltage switchgear and controlgear for rated
voltage above 1kV and up to and including 52kV regarding safety aspects.
In this respect, this document constitutes the exclusion of HV switchgear and controlgear from the scope of the
Directive 2014/68/EU (superseding 97/23/EC) concerning pressure equipment. Article 1, 2. (l) excludes
“compartments for high-voltage electrical equipment such as switchgear, controlgear, transformers, and rotating
machines” from the scope of the Directive.
This document supplements the general specifications given in EN IEC 62271-200:2021 in that it provides
specific requirements for pressurized gas-filled compartments of high-voltage switchgear and controlgear for
rated voltage above 1kV and up to and including 52kV.
Due to compartment geometries that are determined by electrical requirements and by installation conditions,
validation of the design requires physical proof testing. Common pressure vessel geometries and their
calculation codes mostly cannot be applied.
National deviations from this document are listed in Annex A (informative).
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.
Introduction
This document covers the requirements for the design, construction, testing, transportation, inspection and
certification (for filling pressure above 50 kPa relative) of gas-filled compartments, for use in AC switchgear and
controlgear for rated voltage above 1 kV and up to and including 52 kV or for associated gas-filled equipment.
Special consideration is given to these compartments for the following reasons:
a) The compartments form the containment of electrical equipment; thus, their shape is determined by
electrical rather than mechanical requirements.
b) The compartments are part of equipment installed in public or restricted areas, but the equipment is
operated by instructed authorized persons only.
c) Compartments are filled with a thoroughly dried gas or gas mixture that is stable and non-corrosive in the
conditions that prevail inside the compartment. For this reason, no internal corrosion allowance is required
on the wall thickness of these compartments.
d) The compartments are subjected to only small fluctuations of pressure as the gas-filling density will be
maintained within close product related limitations to ensure satisfactory insulating and arc-quenching
properties. Therefore, the compartments are not liable to fatigue due to pressure cycling.
e) The design pressure is below 500 kPa (rel.).
Due to the foregoing reasons and to ensure the maximum service continuity as well as to reduce the risk of
moisture and dust entering the compartments which could endanger safe electrical operation of the switchgear
and controlgear, no pressure tests should be carried out after installation and before placing in service and no
periodic inspection of the compartment interiors or pressure tests should be carried out after the equipment is
placed in service.
Examples of gases and gas mixtures which have been applied or proposed to be applied in high-voltage gas-
filled switchgear and controlgear for rated voltage above 1 kV and up to and including 52 kV are mentioned in
IEC 62271-4.
It is possible to apply this document to both other gases and gas mixtures based - or not - on those mentioned
above which comply with the condition c) above.
In this document, the term pressure is referring to the relative pressure unless otherwise specified.
1 Scope
This document applies to pressurized gas-filled compartments of AC switchgear and controlgear with rated
voltages above 1 kV and up to and including 52 kV for indoor or outdoor installations, where the gas or gas
mixture is being used principally for its dielectric and/or arc-quenching properties and where the gases or gas
mixtures in the compartment can be considered in conditions being chemically stable over its lifetime and non-
corrosive to the material of the pressurized compartment in the conditions that prevail inside.
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.
EN 62271-1:2017, High-voltage switchgear and controlgear — Part 1: Common specifications for alternating
current switchgear and controlgear
EN ISO 3834 (all parts), Quality requirements for fusion welding of metallic materials (ISO 3834)
EN ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded)
— Quality levels for imperfections (ISO 5817)
EN ISO 9606 (all parts), Qualification testing of welders — Fusion welding (ISO 9606)
EN ISO 14732, Welding personnel — Qualification testing of welding operators and weld setters for mechanized
and automatic welding of metallic materials (ISO 14732)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
(gas-filled) compartment
high-voltage compartment in which the insulating gas is at a pressure greater than the pressure outside such
compartment
3.2
manufacturer
individual or body finally responsible for designing and producing the compartment
Note 1 to entry: In this document, this is the switchgear and controlgear manufacturer, even when the compartment is
produced by a sub-manufacturer.
3.3
design pressure (of a compartment)
upper limit of the relative pressure between the pressure inside a compartment at the design temperature, under
defined installation and operating conditions, and the pressure outside that compartment, that is used to
determine the design of the compartment
Note 1 to entry: The transient pressure occurring during and after a breaking operation (e.g. circuit-breaker) is not considered
in the determination of the design pressure.
Note 2 to entry: Design pressure includes the total cumulative pressure increase from gas decomposition by the arc along
lifetime which can happen during normal operation of the switching devices installed inside the gas-filled compartment, for
which they are rated.
Note 3 to entry: This term is equivalent to the “maximum allowable pressure PS” as defined in Directive 2014/68/EU.
3.4
design temperature (of a compartment)
highest average temperature over the compartment, which can be reached by the gas under service conditions
as defined by the manufacturer
Note 1 to entry: Solar radiation should be considered when it has a significant effect on the temperature of the gas and on
the mechanical properties of materials. Similarly, the effects of low temperatures on the properties of materials should be
considered.
Note 2 to entry: This term is equivalent to the “maximum allowable temperature TS” as defined in Directive 2014/68/EU.
3.5
filling pressure (of a compartment)
pressure in kPa (relative) assigned by the manufacturer referred to atmospheric air conditions of 20 °C and
1 013 hPa at which the gas-filled compartment is filled before being put into service
Note 1 to entry: Complete gas filling is done during manufacturing or at the installation site.
3.6
bursting disc safety device
non-reclosing pressure relief device actuated by differential pressure and designed to function by the bursting
of the bursting disc(s), and which is the complete assembly of installed components including, where
appropriate, the bursting disc holder
Note 1 to entry: The term pressure relief device is defined in 3.5.115 of EN IEC 62271-200:2021.
[SOURCE: ISO 4126-2:2018, 3.1, modified – Note 1 to entry added]
3.7
pressure relief safety device
gas tight non-reclosing pressure relief device actuated by differential pressure and designed to open once at a
specified opening pressure, and which is the complete assembly of components including, where appropriate,
the sealing element(s), the pressure-sensitive ele
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