1 - General
- adaptation of the Scope of this standard (include electrical safety related interface with vehicles, extension for electrified road transport – as shown above)
- Incorporate such small technical improvements from IEC 62128, made when transferring from previous version 50122-1, only insofar as these are essential for the coherence of the standard 50122-1
- Harmonize definitions with other railway standards (esp. EN 50119)
- check and redefine some definitions, harmonize with IEC 60050:
   o Check and harmonize terms and definitions specific to railway terminology with IEC 60050 chapters 811 and 821. If modification of a definition is essential, consider harmonization with a recent definition used in a railway specific standard and which should postdate the IEC entry.
   o Check and harmonize terms and definitions specific to electric shock with IEC60050 chapter 195 except where the terms and definitions in IEC 61140:2016 are appropriate and postdate IEC 60050 entry.
   o Check and harmonise other terms and definitions with IEC 50050 where appropriate.
- Review and ensure the document accurately and consistently uses the correct ‘verbal forms for expressions of provisions’ (according to the Internal Regulations, Part 3, clause 7), the wording used is clear and achieves good differentiation between normative and informative content.
- Review and ensure the document’s content relating to the prevention of electric shock is harmonized with basic safety publication IEC/EN 61140. In particular, the IEC/EN61140 content on fundamental rules, terminology, protective provisions (i.e. basic protection, fault protection, enhanced protective provisions).
- Review and revise clause 1 to ensure that the document’s scope is clear and accurately stated, it is harmonised with the title and only aspects falling within this scope are included within the document’s normative content. This take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards and in particular the scope of prEN 50488.
2 – Specific
- Review and modify clause 5 and harmonize its content with the relevant aspects of IEC61140, EN50124 series, prEN50488. Particular consideration to be given to the dimensioning of air clearance associated with protective provisions. This will take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards.
- Review and revise clause 6, in particular the content on protective provisions to improve its alignment with basic safety publication IEC/EN 61140 content for this aspect.
- revision of Chapter 7
- Review and revise clause 10.5 to ensure that the content is fit for purpose and is coordinated with EN 50124, EN 50119 and EN5 0488 in particular, such that these standards will provide a coherent approach. This will take note of the on-going SC9XC work on coordination between these standards.

  • Standard
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1 - General
- adaptation of the Scope of this standard (include electrical safety related interface with vehicles, extension for electrified road transport – as shown above)
- Incorporate such small technical improvements from IEC 62128, made when transferring from previous version 50122-1, only insofar as these are essential for the coherence of the standard 50122-1
- Harmonize definitions with other railway standards (esp. EN 50119)
- check and redefine some definitions, harmonize with IEC 60050:
   o Check and harmonize terms and definitions specific to railway terminology with IEC 60050 chapters 811 and 821. If modification of a definition is essential, consider harmonization with a recent definition used in a railway specific standard and which should postdate the IEC entry.
   o Check and harmonize terms and definitions specific to electric shock with IEC60050 chapter 195 except where the terms and definitions in IEC 61140:2016 are appropriate and postdate IEC 60050 entry.
   o Check and harmonise other terms and definitions with IEC 50050 where appropriate.
- Review and ensure the document accurately and consistently uses the correct ‘verbal forms for expressions of provisions’ (according to the Internal Regulations, Part 3, clause 7), the wording used is clear and achieves good differentiation between normative and informative content.
- Review and ensure the document’s content relating to the prevention of electric shock is harmonized with basic safety publication IEC/EN 61140. In particular, the IEC/EN61140 content on fundamental rules, terminology, protective provisions (i.e. basic protection, fault protection, enhanced protective provisions).
- Review and revise clause 1 to ensure that the document’s scope is clear and accurately stated, it is harmonised with the title and only aspects falling within this scope are included within the document’s normative content. This take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards and in particular the scope of prEN 50488.
2 – Specific
- Review and modify clause 5 and harmonize its content with the relevant aspects of IEC61140, EN50124 series, prEN50488. Particular consideration to be given to the dimensioning of air clearance associated with protective provisions. This will take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards.
- Review and revise clause 6, in particular the content on protective provisions to improve its alignment with basic safety publication IEC/EN 61140 content for this aspect.
- revision of Chapter 7
- Review and revise clause 10.5 to ensure that the content is fit for purpose and is coordinated with EN 50124, EN 50119 and EN5 0488 in particular, such that these standards will provide a coherent approach. This will take note of the on-going SC9XC work on coordination between these standards.

  • Standard
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1 - General
- adaptation of the Scope of this standard (include electrical safety related interface with vehicles, extension for electrified road transport – as shown above)
- Incorporate such small technical improvements from IEC 62128, made when transferring from previous version 50122-1, only insofar as these are essential for the coherence of the standard 50122-1
- Harmonize definitions with other railway standards (esp. EN 50119)
- check and redefine some definitions, harmonize with IEC 60050:
   o Check and harmonize terms and definitions specific to railway terminology with IEC 60050 chapters 811 and 821. If modification of a definition is essential, consider harmonization with a recent definition used in a railway specific standard and which should postdate the IEC entry.
   o Check and harmonize terms and definitions specific to electric shock with IEC60050 chapter 195 except where the terms and definitions in IEC 61140:2016 are appropriate and postdate IEC 60050 entry.
   o Check and harmonise other terms and definitions with IEC 50050 where appropriate.
- Review and ensure the document accurately and consistently uses the correct ‘verbal forms for expressions of provisions’ (according to the Internal Regulations, Part 3, clause 7), the wording used is clear and achieves good differentiation between normative and informative content.
- Review and ensure the document’s content relating to the prevention of electric shock is harmonized with basic safety publication IEC/EN 61140. In particular, the IEC/EN61140 content on fundamental rules, terminology, protective provisions (i.e. basic protection, fault protection, enhanced protective provisions).
- Review and revise clause 1 to ensure that the document’s scope is clear and accurately stated, it is harmonised with the title and only aspects falling within this scope are included within the document’s normative content. This take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards and in particular the scope of prEN 50488.
2 – Specific
- Review and modify clause 5 and harmonize its content with the relevant aspects of IEC61140, EN50124 series, prEN50488. Particular consideration to be given to the dimensioning of air clearance associated with protective provisions. This will take note of the on-going SC9XC work on coordination between SC9XC / TC9X standards.
- Review and revise clause 6, in particular the content on protective provisions to improve its alignment with basic safety publication IEC/EN 61140 content for this aspect.
- revision of Chapter 7
- Review and revise clause 10.5 to ensure that the content is fit for purpose and is coordinated with EN 50124, EN 50119 and EN5 0488 in particular, such that these standards will provide a coherent approach. This will take note of the on-going SC9XC work on coordination between these standards.

  • Standard
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This European Standard covers d.c. metal-enclosed and non-metallic enclosed switchgear
assemblies used in indoor stationary installations of traction systems, with nominal voltage
not exceeding 3 000 V.
It is intended that individual items of equipment, for example circuit breakers, housed in the
assembly are designed, manufactured and individually tested (simulating the enclosure when
necessary) in accordance with their respective parts of EN 50123 or, when appropriate, with
another applicable standard.
NOTE 1 The requirements covered in this European Standard are those concerning the assembly as such, its
enclosure and the mutual influence of the equipment enclosed.
NOTE 2 EMC requirements are covered by EN 50121-5 and additional requirements concerning dependability
(RAMS) are covered by EN 50126.

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  • Amendment
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Amendment to cover Norwegian A-deviation.

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This part of EN 50123 specifies requirements for outdoor d.c. switch-disconnectors, disconnectors and earthing switches for use in outdoor fixed installations of traction systems.

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This part of EN 50123 specifies requirements for d.c. disconnectors, switch-disconnectors and earthing switches for use in indoor fixed installations of traction systems.

  • Amendment
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This European Standard specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. This European Standard applies to all new lines and to all major revisions to existing lines for the following electric traction systems: a) railways; b) guided mass transport systems such as 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system, c) material transportation systems. This European Standard does not apply to: d) mine traction systems in underground mines; e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system; f) suspended cable cars; g) funicular railways. This European Standard does not specify working rules for maintenance.

  • Corrigendum
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This European Standard specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. This European Standard applies to all new lines and to all major revisions to existing lines for the following electric traction systems: a) railways; b) guided mass transport systems such as 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system, c) material transportation systems. This European Standard does not apply to: d) mine traction systems in underground mines; e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system; f) suspended cable cars; g) funicular railways. This European Standard does not specify working rules for maintenance.

  • Standard
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This European Standard specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. This European Standard applies to all new lines and to all major revisions to existing lines for the following electric traction systems: a) railways; b) guided mass transport systems such as 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system, c) material transportation systems. This European Standard does not apply to: d) mine traction systems in underground mines; e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system; f) suspended cable cars; g) funicular railways. This European Standard does not specify working rules for maintenance.

  • Amendment
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This European Standard specifies requirements for the protective provisions relating to electrical safety in fixed installations, when it is reasonably likely that hazardous voltages or currents will arise for people or equipment, as a result of the mutual interaction of a.c. and d.c. electric traction systems. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. The mutual interaction can be of any of the following kinds: - parallel running of a.c. and d.c. electric traction systems; - crossing of a.c. and d.c. electric traction systems; - shared use of tracks, buildings or other structures; - system separation sections between a.c. and d.c. electric traction systems. Scope is limited to basic frequency voltages and currents and their superposition. This European Standard does not cover radiated interferences. This European Standard applies to all new lines, extensions and to all major revisions to existing lines for the following electric traction systems: a) railways; b) guided mass transport systems such as: 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system; c) material transportation systems. The standard does not apply to: d) mine traction systems in underground mines; e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system for railways; f) suspended cable cars; g) funicular railways; h) procedures or rules for maintenance.

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This European Standard specifies requirements for protective provisions against the effects of stray currents, which result from the operation of d.c. traction systems. As experience for several decades has not shown evident corrosion effects from a.c. traction systems and actual investigations are not completed, this European Standard only deals with stray currents flowing from a d.c. traction system. This European Standard applies to all metallic fixed installations which form part of the traction system, and also to any other metallic components located in any position in the earth, which can carry stray currents resulting from the operation of the railway system. This European Standard applies to all new d.c. lines and to all major revisions to existing d.c. lines. The principles may also be applied to existing electrified transportation systems where it is necessary to consider the effects of stray currents. It provides design requirements to allow maintenance. The range of application includes: a) railways, b) guided mass transport systems such as: 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system, c) material transportation systems. This European Standard does not apply to: d) mine traction systems in underground mines, e) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly from the contact line system and are not endangered by the traction power supply system, f) suspended cable cars, g) funicular railways. This European Standard does not specify working rules for maintenance.

  • Standard
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This International Standard specifies the requirements for the performance of all semiconductor power converters and semiconductor power switches using controllable and/or non-controllable electronic valve devices. The electronic valve devices mainly comprise semiconductor devices, either not controllable (i.e. rectifier diodes) or controllable (i.e. thyristors, triacs, turn-off thyristors and power transistors). The controllable devices may be reverse blocking or reverse conducting and controlled by means of current, voltage or light. Non-bistable devices are assumed to be operated in the switched mode. This standard is primarily intended to specify the basic requirements for converters in general and the requirements applicable to line commutated converters for conversion of a.c. power to d.c. power or vice versa. Parts of this standard are also applicable to other types of electronic power converter provided that they do not have their own product standards. These specific equipment requirements are applicable to semiconductor power converters that either implement power conversion or use commutation (for example semiconductor selfcommutated converters) or involve particular applications (for example semiconductor converters for d.c. motor drives) or include a combination of said characteristics (for example direct d.c. converters for electric rolling stock). This standard is applicable to all power converters not covered by a dedicated product standard, or if special features are not covered by the dedicated product standard. Dedicated product standards for power converters should refer to this International Standard.

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This International Standard applies to composite suspension/tension insulators consisting of a load-bearing cylindrical insulating solid core consisting of fibres - usually glass - in a resinbased matrix, a housing (outside the insulating core) made of polymeric material and end fittings permanently attached to the insulating core. Composite insulators covered by this standard are intended for use as suspension/tension line insulators, but it should be noted that these insulators can occasionally be subjected to compression or bending, for example when used as phase-spacers. This standard can be applied in part to hybrid composite insulators where the core is made of a homogeneous material (porcelain, resin), see Clause 8. The object of this standard is to - define the terms used, - prescribe test methods, - prescribe acceptance criteria. This standard does not include requirements dealing with the choice of insulators for specific operating conditions.

  • Standard
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  • Standard
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  • Standard – translation
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This European Standard specifies the main characteristics of the supply voltages of traction systems, such as traction fixed installations, including auxiliary devices fed by the contact line, and rolling stock, for use in the following applications : - railways; - guided mass transport systems such as tramways, elevated and underground railways mountain railways, and trolleybus systems; - material transportation systems. This European Standard does not apply to - mine traction systems in underground mines, - cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system, - suspended cable cars, - funicular railways.

  • Standard
    17 pages
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This European Standard specifies the main characteristics of the supply voltages of traction systems, such as traction fixed installations, including auxiliary devices fed by the contact line, and rolling stock, for use in the following applications : - railways; - guided mass transport systems such as tramways, elevated and underground railways mountain railways, and trolleybus systems; - material transportation systems. This European Standard does not apply to - mine traction systems in underground mines, - cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system, - suspended cable cars, - funicular railways.

  • Amendment
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This Part 1 of the European standards series EN 50121 outlines the structure and the content of the whole set. This part alone is not sufficient to give presumption of conformity to the essential requirements of the EMC-Directive and must be used in conjunction with other parts of this standard. Annex A describes the characteristics of the railway system which affect electromagnetic compatibility (EMC) behaviour. Phenomena excluded from the set are Nuclear EM pulse, abnormal operating conditions and the induction effects of direct lightning strike. Emission limits at the railway boundary do not apply to intentional transmitters within the railway boundaries. Safety considerations are not covered by this set of standards. The biological effects of non-ionising radiation as well as apparatus for medical assistance, such as pacemakers, are not considered here.

  • Standard
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This European Standard specifies the requirements for the performance of all fixed installations
electronic power converters, using controllable and/or non-controllable electronic valves,
intended for traction power supply.
The devices can be controlled by means of current, voltage or light. Non-bistable devices are
assumed to be operated in the switched mode.
This European Standard applies to fixed installations of following electric traction systems:
− railways,
− guided mass transport systems such as: tramways, light rail systems, elevated and
underground railways, mountain railways, trolleybusses.
This European Standard does not apply to
− cranes, transportable platforms and similar transportation equipment on rails,
− suspended cable cars,
− funicular railways.
This European Standard applies to diode rectifiers, controlled rectifiers, inverters and frequency
converters.
The equipment covered in this European Standard is the converter itself.

  • Standard
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This European Standard covers specific characteristics of traction transformers as defined in 1.3.1, used in traction substation or along the track for the supply of power to a.c. and d.c. traction systems or to provide power to auxiliary services. Traction transformers are either
-   single-phase traction transformers,
-   single-, three- or poly-phase rectifier-transformers or converter/inverter-transformers for d.c. or a.c. contact line,
-   single phase auto-transformers for traction power supply,
-   single- or three-phase auxiliary transformers at traction supply voltage.
Transformers feeding a.c. contact lines are covered by EN 60076. Dry-type transformers are covered by HD 464. These standards are valid with the additional requirements given in this document.
For transformers feeding contact lines through static converters EN 61378-1 may assist, but modified or additional requirements are given in this document.
NOTE   Transformers mounted on-board traction vehicles are covered by EN 60310 and are excluded from the scope of this document.
Electromagnetic compatibility is ruled by EN 60076-1 which states that a transformer may be considered a passive element in this respect.
Some accessories however are subject to EMC requirements and shall comply with EN 50121-5.

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This European Standard provides requirements for some type tests which are significant only when made on the entire group.
It provides also a basic relationship between compatible ratings of traction transformer and converter(s), in order to provide minimum requirements for the choice of their ratings.
Moreover it gives the minimum values to be considered in order to choose switching devices with characteristics suitable for the converter group(s) involved.
Annexes provide useful information as a guide for the group designer.
Table 1 indicates the components of a converter group and the relevant applicable standards.

  • Standard
    28 pages
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This European Standard covers d.c. metal-enclosed and non-metallic enclosed switchgear
assemblies used in indoor stationary installations of traction systems, with nominal voltage
not exceeding 3 000 V.
It is intended that individual items of equipment, for example circuit breakers, housed in the
assembly are designed, manufactured and individually tested (simulating the enclosure when
necessary) in accordance with their respective parts of EN 50123 or, when appropriate, with
another applicable standard.
NOTE 1 The requirements covered in this European Standard are those concerning the assembly as such, its
enclosure and the mutual influence of the equipment enclosed.
NOTE 2 EMC requirements are covered by EN 50121-5 and additional requirements concerning dependability
(RAMS) are covered by EN 50126.

  • Standard
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This part of EN 50123 specifies requirements for d.c. circuit breakers for use in fixed installations of traction systems.
NOTE   Switchgear assemblies, electromagnetic compatibility (EMC) and dependability are not covered in this part of EN 50123, but by other parts of this standard or by other standards, as indicated in EN 50123-1.

  • Standard
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This part of EN 50123 specifies requirements for d.c. disconnectors, switch-disconnectors and earthing switches for use in indoor fixed installations of traction systems.

  • Standard
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The EN 50123 series specifies requirements for d.c. switchgear and controlgear and is intended to be used in fixed electrical installations with nominal voltage not exceeding 3 000 V d.c., which supply electrical power to vehicles for public guided transport, i.e. railway vehicles, tramway vehicles, underground vehicles and trolley-buses.
Part 1 specifies general requirements.
The other parts are covering
Part 2   D.C. circuit breakers,
Part 3   Indoor d.c. disconnectors, switch-disconnectors and earthing switches,
Part 4   Outdoor d.c. disconnectors, switch-disconnectors and earthing switches,
Part 5   Surge arresters and low voltage limiters for specific use in d.c. systems,
Part 6    D.C. switchgear assemblies,
Part 7 1   Measurement, control and protection devices for specific use in d.c. traction systems – Application guide,
Part 7 2   Measurement, control and protection devices for specific use in d.c. traction systems –  Isolating current transducers and other current measuring devices,
Part 7 3   Measurement, control and protection devices for specific use in d.c. traction systems –Isolating voltage transducers and other voltage measuring devices

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This part of EN 50123 specifies requirements for outdoor d.c. switch-disconnectors, disconnectors and earthing switches for use in outdoor fixed installations of traction systems.

  • Standard
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This European Standard gives the requirements for isolating voltage transducers and other voltage measuring devices used in d.c. railway applications, fixed installations.
This transducer is normally positioned between the voltage sensor on the live switchboard conductor or rail and the secondary device, giving galvanic insulation between the input and the output.

  • Standard
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This European Standard provides assistance, guidance and requirements for the design of protection, control and measuring systems in d.c. installations intended to provide a power supply to traction systems. This application guide identifies the characteristics and parameters of equipment used in the measurement, control and protection of d.c. traction systems.
Guidance is given concerning the appropriate application of electrical protection systems.

  • Standard
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This European Standard gives the requirements for isolating current transducers and other current measuring devices used in d.c. railway applications, fixed installations.
This transducer is normally positioned between the sensor in the live switchboard conductor or rail and the secondary device, giving galvanic insulation between the input and the output.

  • Standard
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Applies to all types of semiconductor inverters of the self-commutated type and semiconductor convertors which contain at least one part of a self-commutated type, including direct a.c. convertors and d.c. convertors for all applications.

  • Standard
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This standard specifies requirements, methods of test, and performance criteria for control and indicating equipment (see item B of figure 1 of EN 54-1) for usein fire detection and fire alarm systems installed in buildings.

  • Standard
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This standard specifies requirements, methods of test and performance criteria for power supply equipment (see component L of figure 1 of EN 54-1:1996) of fire detection and fire alarm systems installed in buildings.  Note: Power supply equipment with special characteristics, developed for particular appli- cations, is not necessarily the subject of this standard and may require further tests.

  • Standard
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Applies to insulator strings and insulator sets comprising string insulator units of ceramic material or glass for use on a.c. overhead power lines with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. This part of EN 60383 also applies to insulator strings and insulator sets for use on d.c. overhead electric traction lines. This part of EN 60383 also applies to insulator strings and insulator sets of similar design when used in substations.

  • Standard
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Applies to insulators of ceramic material or glass for use on a.c. overhead power lines with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. Also applies to insulators for use on d.c. overhead electric traction lines and applies to string insulator units, rigid overhead line insulators and to insulators of similar design when used in substations.

  • Standard
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Specifies characteristics wherein convertor transformers differ from ordinary power transformers. In all other respects, the rules specified in HD 398.1 shall apply.

  • Standard
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