1、Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN 50123-3:2003 Railway applications Fixed installations D.C. switchgear Part 3: Indoor d.c. disconnectors, switch-disconnectors and earthing switches The European
2、 Standard EN 50123-3:2003 has the status of a British Standard ICS 29.160.60; 45.020 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIBS EN 50123-3:2003 This British Standard, was published under the authority of the Standards Polic
3、y and Strategy Committee on 11 July 2003 BSI 11 July 2003 ISBN 0 580 42248 8 National foreword This British Standard is the official English language version of EN 50123-3:2003. It supersedes BS EN 50123-3:1996 which is withdrawn. The UK participation in its preparation was entrusted by Technical Co
4、mmittee GEL/9, Railway electrotechnical applications, to Subcommittee GEL/9/3, Fixed equipment, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international
5、or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to in
6、clude all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enq
7、uiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 22, an inside
8、 back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BS
9、IEUROPEAN STANDARD EN 50123-3 NORME EUROPENNE EUROPISCHE NORM February 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003
10、 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 50123-3:1995English version Railway applications Fixed installations D.C. switchgear Part 3: Indoor d.c. disconnectors, switch-dis
11、connectors and earthing switches Applications ferroviaires Installations fixes Appareillages courant continu Partie 3: Interrupteurs-sectionneurs, sectionneurs et sectionneurs de terre pour lintrieur Bahnanwendungen Ortsfeste Anlagen Gleichstrom-Schalteinrichtungen Teil 3: Gleichstrom-Trennschalter,
12、 -Lasttrennschalter und -Erdungsschalter fr Innenrume 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
13、 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
14、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, Ger
15、many, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIEN 50123-3:2003 2 Foreword T
16、his 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 U
17、nique 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. T
18、hese 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 publica
19、tion 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 informat
20、ion only. In this standard, annex A is informative. _ Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSI 3 EN 50123-3:2003 Contents 1 Scope .4 2 Normative references4 3 Definitions.4 4 Service requirements 4 5 Characteristics of the
21、unit4 5.1 Enumeration of the characteristics4 5.2 Type of unit .5 5.3 Rated values5 5.4 Class of use6 5.5 Control circuits7 5.6 Auxiliary contacts and circuits .8 6 Construction .8 6.1 General8 6.2 Unit enclosures10 6.3 Temperature-rises10 6.4 Dielectric strength10 6.5 Electrical and mechanical endu
22、rance 10 6.6 Operation.11 6.7 Corrosion protection12 6.8 Noise emission.12 6.9 Cooling12 6.10 Servo-control (where applicable) 12 6.11 Other facilities.12 7 Information and marking. 13 7.1 Information13 7.2 Marking.13 8 Tests 14 8.1 General14 8.2 Applicable tests and test sequence 14 8.3 Performance
23、 of tests. 15 Annex A (informative) Information required 20 A.1 General. 20 A.2 Procurement specification. 20 A.3 Manufacturers specification . 20 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIEN 50123-3:2003 4 1 Scope This part
24、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
25、 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 swit
26、ches 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 a
27、ppropriate 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 pu
28、blication 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 covere
29、d 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); auxilia
30、ry circuits (5.6). Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSI 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, earthin
31、g 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
32、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 propose
33、d, 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 U n(see EN 50163); system voltages and li
34、mits (see 3.2.1 and 5.1.3 of EN 50123-1); rated voltage U Ne(see 3.2.3 of EN 50123-1); rated insulation voltage U Nm(see 3.2.2 of EN 50123-1). It shall be equal to or higher than U max ; rated impulse withstand voltage U Ni(see 3.2.4 of EN 50123-1); power-frequency voltage withstand level U a(see 3.
35、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 I thI the(see 3.2.8 and 3.2.9 of EN 50123-1); NOTE 1 Earthing switches are not required to be assigned this rating. Li
36、censed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIEN 50123-3:2003 6 rated service current I Ne(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
37、.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 U Ne . A rated breaking capacity requires the unit to be able to interrupt any current
38、 of a value lower than or equal to this rated breaking capacity. rated short-time withstand current I Ncw(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 I Nss . Overload capability: the purchaser shall inform the suppl
39、ier 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 elect
40、rically 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. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Cop
41、y, (c) BSI 7 EN 50123-3:2003 Table 1 - Categories of units Category Capacities (with t c 0,01 s) Short-time withstand currentMaking Breaking Current Duration I 0 0 I Ncw /I Ncwe0,25 s II 0 I NeI Ncw0,25 s III I NeI NeI Ncw0,25 s IV 3 I Ne3 I NeI Ncw0,25 s V I Nss0 I Ncw /I Ncwe0,25 s VI I Nss3 I NeI
42、 Ncw0,25 s NOTE 1 Unless otherwise specified I Nsshas the same rating as I Ncwor, for earthing switches, I Ncwe . 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 inh
43、ibit 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 b
44、reaking 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 t csee 3.2.
45、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 I Ncwewhich 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
46、.); 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 insula
47、tion 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. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 09 October 2003, Uncontrolled Copy, (c) BSIEN 50
48、123-3:2003 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 intermittentl
49、y, 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
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