SIST EN 50123-3:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SURVWRULKBahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen -- Teil 3: Gleichstrom-Trennschalter und -Lasttrennschalter und -Erdungsschalter für InnenräumeApplications ferroviaires - Installations fixes - Appareillages à courant continu -- Partie 3: Interrupteurs-sectionneurs, sectionneurs et sectionneurs de terre pour l'intérieurRailway applications - Fixed installations - D.C. switchgear -- Part 3: Indoor d.c. disconnectors, switch-disconnectors and earthing switches29.280Electric traction equipment29.130.99Druge stikalne in krmilne napraveOther switchgear and controlgearICS:Ta slovenski standard je istoveten z:EN 50123-3:2003SIST EN 50123-3:2003en01-maj-2003SIST EN 50123-3:2003SLOVENSKI
STANDARDSIST EN 50123-3:19981DGRPHãþD



SIST EN 50123-3:2003



EUROPEAN STANDARD
EN 50123-3 NORME EUROPÉENNE EUROPÄISCHE NORM
February 2003 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50123-3:2003 E
ICS 29.160.60; 45.020 Supersedes EN 50123-3:1995
English version
Railway applications – Fixed installations – D.C. switchgear Part 3: Indoor d.c. disconnectors, switch-disconnectors
and earthing switches
Applications ferroviaires –
Installations fixes –
Appareillages à courant continu Partie 3: Interrupteurs-sectionneurs, sectionneurs et sectionneurs de terre
pour l'intérieur
Bahnanwendungen –
Ortsfeste Anlagen –
Gleichstrom-Schalteinrichtungen Teil 3: Gleichstrom-Trennschalter,
-Lasttrennschalter und -Erdungsschalter für Innenräume
This European Standard was approved by CENELEC on 2002-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 50123-3:2003



EN 50123-3:2003 – 2 – Foreword This European Standard was prepared by SC 9XC, Electric supply and earthing systems for public transport equipment and ancillary apparatus (fixed installations), of the Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENLEC as EN 50123-3 on 2002-09-01. This European Standard supersedes EN 50123-3:1995 + corrigendum September 1996. It has been prepared taking into account IEC 61992-3 in order to align technically as much as possible this EN 50123-3 and IEC 61992-3. These documents are to be considered as technically equivalent except for those references and peculiarities which are due to the European standardisation in the railway application field. The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-09-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-09-01 This Part 3 is to be used in conjunction with EN 50123-1:2003. Annexes designated “informative” are given for information only.
In this standard, annex A is informative. __________ SIST EN 50123-3:2003



– 3 – EN 50123-3:2003 Contents
1 Scope.4 2 Normative references.4 3 Definitions.4 4 Service requirements.4 5 Characteristics of the unit.4 5.1 Enumeration of the characteristics.4 5.2 Type of unit.5 5.3 Rated values.5 5.4 Class of use.6 5.5 Control circuits.7 5.6 Auxiliary contacts and circuits.8 6 Construction.8 6.1 General.8 6.2 Unit enclosures.10 6.3 Temperature-rises.10 6.4 Dielectric strength.10 6.5 Electrical and mechanical endurance.10 6.6 Operation.11 6.7 Corrosion protection.12 6.8 Noise emission.12 6.9 Cooling.12 6.10 Servo-control (where applicable).12 6.11 Other facilities.12 7 Information and marking.13 7.1 Information.13 7.2 Marking.13 8 Tests.14 8.1 General.14 8.2 Applicable tests and test sequence.14 8.3 Performance of tests.15 Annex A (informative)
Information required.20 A.1
General.20 A.2
Procurement specification.20 A.3
Manufacturer's specification.20
SIST EN 50123-3:2003



EN 50123-3:2003 – 4 – 1 Scope 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. NOTE 1
Switchgear assemblies, electromagnetic compatibility (EMC) and dependability are not covered in this part of EN 50123, but rather by other parts of this standard or other documents as indicated in EN 50123-1. NOTE 2
In this standard the word "unit" means "disconnector and/or switch-disconnector and/or earthing switch" as defined in 3.1.4, 3.1.5 and 3.1.6 of EN 50123-1. NOTE 3
Disconnectors, switch-disconnectors and earthing switches may have electrically latched mechanisms and, in such cases, may be indicated with the current term of "power contactors". 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). See EN 50123-1:2003,. 3 Definitions For the purposes of this European Standard, the terms and definitions given in EN 50123-1 apply. 4 Service requirements Environmental conditions applicable to the equipment discussed in this standard are covered in 4.1 of EN 50123-1. 5 Characteristics of the unit 5.1 Enumeration of the characteristics The characteristics of the unit and its assigned designations and values (where applicable) are covered as follows: • type of unit (5.2); • rated values (5.3); • class of use (5.4); • control circuits (5.5); • auxiliary circuits (5.6). SIST EN 50123-3:2003



– 5 – EN 50123-3:2003 5.2 Type of unit A unit shall be defined by the following details as applicable: • whether the unit is a switch-disconnector, disconnector, earthing switch or a combination of these types; • number of poles; • number of positions (if there are more than two); • provision of an enclosure; • degree of protection provided by the enclosure (see 3.3.29 of EN 50123-1). 5.3 Rated values 5.3.1 General The rated characteristic values shall be specified by the purchaser. Nominal voltage values shall be selected from the values indicated in Table 1 in EN 50123-1; current values should have one of the preferred values in 5.1.2 of EN 50123-1. These values shall be confirmed by the manufacturer, who shall indicate the rated values for the type of unit proposed, and shall be complemented with other data. All these values are to be stipulated in accordance with 5.3.2 to 5.3.4, but it is not necessary to specify all the listed rated values.
5.3.2 Voltages A unit is defined by the following voltages: • nominal voltage Un (see EN 50163); • system voltages and limits (see 3.2.1 and 5.1.3 of EN 50123-1); • rated voltage UNe (see 3.2.3 of EN 50123-1); • rated insulation voltage UNm
(see 3.2.2 of EN 50123-1). It shall be equal to or higher than Umax; • rated impulse withstand voltage UNi
(see 3.2.4 of EN 50123-1); • power-frequency voltage withstand level Ua
(see 3.2.5 of EN 50123-1); • rated auxiliary and control supply voltages
(see 3.2.3.1 of EN 50123-1). 5.3.3 Currents A unit is defined by the following currents: • conventional thermal current Ith Ithe
(see 3.2.8 and 3.2.9 of EN 50123-1); NOTE 1
Earthing switches are not required to be assigned this rating. SIST EN 50123-3:2003



EN 50123-3:2003 – 6 – • rated service current INe
(see 3.2.10 of EN 50123-1); NOTE 2
Earthing switches are not required to be assigned this rating. • rated breaking and making capacities
(see 3.2.18 and 3.2.22 of EN 50123-1); – Switch-disconnectors and those disconnectors for which the manufacturer declares a making capacity, shall be able to make the stated prospective current at a voltage U equal to 1,2 UNe. – A rated breaking capacity requires the unit to be able to interrupt any current of a value lower than or equal to this rated breaking capacity. • rated short-time withstand current INcw
(see 3.2.11 of EN 50123-1). NOTE 3
Rated short-time currents INcw need not have the same value as the rated short-circuit current INss. • Overload capability: the purchaser shall inform the supplier of the load cycle requirements (see 3.2.10, note 2, of EN 50123-1). 5.4 Class of use Disconnectors shall close and open at no-load except if otherwise declared by the manufacturer. Switch-disconnectors shall close and open on-load, including highly inductive loads. Both devices have either electrically latched or mechanically latched mechanisms. The minimum breaking, making and short-time withstand currents of the units shall be at least those in Table 1 for the appropriate category. SIST EN 50123-3:2003



– 7 – EN 50123-3:2003 Table 1 - Categories of units Category Capacities (with tc ≥ 0,01 s) Short-time withstand current Making Breaking Current Duration I 0 0 INcw/INcwe 0,25 s II 0 INe INcw 0,25 s III INe INe INcw 0,25 s IV 3 INe 3 INe INcw 0,25 s V INss 0 INcw/INcwe 0,25 s VI INss 3 INe INcw 0,25 s NOTE 1
Unless otherwise specified INss has the same rating as INcw or, for earthing switches,INcwe. NOTE 2
A typical application of the above categories is the following: • Category I: Disconnector and earthing switch used in locations where the purchaser has taken all precautions to inhibit making on to a fault current. • Category II: Switch disconnector required for breaking load current only. • Category III: Switch-disconnector in series with the feeder, required for making and breaking the rated current only. • Category IV: Switch-disconnector as in III, but required for making and breaking the train starting current. • Category V: Disconnector and earthing switch used in locations where the possibility exists of an inadvertent make on to a fault current. • Category VI: Switch-disconnector as in IV, but required for making on to a fault current. NOTE 3
For definition of tc see 3.2.15 of EN 50123-1. NOTE 4
For earthing switches, refer to 8.3.4.3 of EN 50123-6 to establish the value of INcwe which shall be 10 kA sustained as a minimum. 5.5 Control circuits The control circuits are identified by the following: • the voltage of the control circuits; • the kind of current (d.c. or a.c.); • the frequency, in case of a.c. The voltage of the supply source and its frequency are the values on which the performance, the thermal behaviour and the insulation characteristics are based. Unless otherwise required, the voltage shall be in accordance with 5.2 of EN 50123-1 and the rated insulation voltage shall be in accordance with EN 50124-1. The supply voltage shall be within a range between 80 % and 110 % of the specified voltage according with 5.2 of EN 50123-1. SIST EN 50123-3:2003



EN 50123-3:2003 – 8 – When the control voltage is the same as in the main circuit, the same variations as in the main circuit apply. The manufacturer shall indicate the value(s) of the current drawn by the control circuits at the specified voltage. In case of control circuits which draw current intermittently, the duration of the current flow shall be given. 5.6 Auxiliary contacts and circuits Auxiliary circuits are mainly defined by the number of contacts provided, their rating (thermal current and voltage) and by their characteristics (NO, NC or commutation). Unless otherwise required, the rated voltage shall be in accordance with 5.2 of EN 50123-1, and the rated insulation voltage shall be in accordance with EN 50124-1.
The purchaser shall specify the minimum number of auxiliary contacts required. The auxiliary wiring connected to a circuit at 1 000 V a.c. or 1 500 V d.c. or above shall be physically separated from those connected to a circuit at a voltage below said limits. For other characteristics of the auxiliary circuits, the requirements of 5.5 apply. 6 Construction 6.1 General All apparatus and connections required for the safe and satisfactory operation, control and protection of the equipment concerned, shall be provided, whether or not specifically mentioned. The equipment shall be earthed, insulated, screened or enclosed as may be appropriate to ensure the protection of the equipment and the safety of those concerned in its operation and maintenance. Control and auxiliary circuits and contacts shall comply with the requirements of 5.2 of EN 50123-1. 6.1.1 Materials No materials containing asbestos shall be used in the construction of the units. NOTE
Special attention should be paid to the ability of the material used to resist moisture and fire: materials used should be of the self-extinguishing type, so that the risk of propagation of fire from one cubicle to another is minimised (see Annex B of EN 50123-1). 6.1.2 Arcing contacts Arcing contacts, if any, which are liable to be consumed during arc interruption shall be easy to replace. SIST EN 50123-3:2003



– 9 – EN 50123-3:2003 6.1.3 Clearances and creepage distances Clearances and creepage distances shall not be lower than those indicated in Table 1 of EN 50123-1 and Annex D of EN 50123-1 respectively. NOTE
Clearance and creepage distances may be increased to take into account the presence of foreign substances after the number of operations, in normal and short-circuit conditions, occurring during the normal life-span between cleaning procedures. Where applicable, ribs shall be provided in order to break the continuity of conducting deposit which occurs during operation. 6.1.4 Primary connections The units shall be equipped with fixed, removable (bolted or clamped) or plug-in coupling. 6.1.5 Location of the primary connections For non-withdrawable units, the terminals for the primary connections shall be accessible with the unit as in its normal operating position. For withdrawable units, the terminals for the primary connections shall be accessible in the conditions detailed in EN 50123-6. 6.1.6 Earthing terminal The frames, the structure and the fixed parts of the metallic enclosures shall be connected to each other and to a suitable earthing terminal, placed in an accessible position, in order to allow earthing. NOTE 1
This condition may be fulfilled by normal construction elements ensuring an adequate electric continuity. For withdrawable units the earth connection shall be made before the shutters are opened, and the shutters shall be closed before the earth connection is disconnected. NOTE 2
The purchaser may require a dedicated earth connection for this purpose. For non-dedicated earth connection, any bolt or similar fixing used for earth continuity, the maintenance instructions should state the requirements for cleaning the surfaces and ensuring tightness. The earthing terminal shall be suitably protected against corrosion. The standard earth symbol shall be adequately and permanently marked. The earth terminal shall be capable of carrying the rated earth fault current INcwe for 0,25 s (see 8.3.4.3 of EN 50123-6). 6.1.7 Manual operation means All units shall be provided with a manual closing handle for service, emergency and/or maintenance use as indicated in 6.6.1. SIST EN 50123-3:2003



EN 50123-3:2003 – 10 – 6.2 Unit enclosures Unit enclosures shall conform with the requirements of EN 50123-6. 6.3 Temperature-rises
6.3.1 Limits The temperature shall not rise by more than the values given in clause 6 of EN 50123-1. 6.3.2 Main circuit The main circuit of a unit, including all electrically connected parts, shall withstand its rated currents INe, Ith or Ithe. It shall also comply with the overcurrent load cycle which may be specified by the purchaser (see 3.2.10, note 2, of EN 50123-1). 6.3.3 Control circuit The control circuit, as well as the control devices, used for the opening and closing operations of a unit shall not exceed the rated temperature-rise limits during their operation. 6.3.4 Auxiliary circuits The auxiliary circuits, as well as the auxiliary devices, shall withstand their conventional thermal current (for switching devices) or their rated service current (for other equipment), without exceeding the rated temperature-rise limits. 6.4 Dielectric strength Dielectric strength shall conform to the values stipulated in Table 1 in EN 50123-1. 6.5 Electrical and mechanical endurance The unit shall be capable of carrying out the following number of operations when tested in accordance with 7.3.2 and 7.3.3 of EN 50123-1: a) for checking of mechanical endurance, without current in the main circuit, the following operating cycles shall be performed: 1) dependent manually operated units only: 100; 2) units u
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