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1、BRITISH STANDARD BS EN 50123-3:1996 Incorporating Amendment No. 1 Railway applications Fixed installations D.C. switchgear Part 3: Indoor d.c. disconnectors and switch-disconnectors The European Standard EN 50123-3:1995 has the status of a British Standard This British Standard should be read in con
2、junction with BS EN 50123-1:1996 ICS 29.120.60; 45.020 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50123-3:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published und
3、er the authority of the Standards Board and comes into effect on 15 March 1996 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PEL/9 Draft for comment 93/208120 DC ISBN 0 580 24930 1 Committees responsible for this British Standard The preparation of
4、 this British Standard was entrusted to Technical Committee PEL/9, Railway electrotechnical applications, upon which the following bodies were represented: British Cable Makers Confederation Confederation of Passenger Transport UK Docklands Light Railway Federation of the Electronics Industry Health
5、 and Safety Executive London Underground Ltd. Power Supply Manufacturers Association PSMA (BEAMA Ltd.) Railtrack Railway Industry Association The following bodies were also represented in the drafting of the standard through sub-committees and panels: British Railways Board Transmission and Distribu
6、tion Association (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments 9406March 1997Clause 8.3.5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50123-3:1996 BSI 08-1999i Contents Page Committees responsible Inside fro
7、nt cover National foreword ii Foreword 2 1Scope3 2Normative references3 3Definitions3 4Service conditions3 5Characteristics of the unit3 6Construction4 7Information and marking6 8Tests7 Annex A (informative) Information required13 Table 1 Categories of switch-disconnectors4 Table 2 Test tolerances7
8、Table 3 List of applicable tests and sequence7 Table 4 Recommended quantities and dimensions of copper bars9 Table 5 Value of forces or couples for the tests12 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50123-3:1996 ii BSI 08-1999
9、 National foreword This British Standard has been prepared by Technical Committee PEL/9 and is the English language version of EN 50123-3:1995 Railway applications Fixed installations D.C. switchgear Part 3: Indoor d.c. disconnectors and switch-disconnectors, together with its corrigendum:1996, publ
10、ished by the European Committee for Electrotechnical Standardization CENELEC. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself con
11、fer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 14 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
12、in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50123-3 May 1995 ICS 29.160.60; 45.020Incorporates corrigendum September 1996 Descriptors:
13、 Railway fixed equipment, electric traction, d.c., switch-disconnector, performance evaluation, equipment specification, temperature rise, electric endurance test, fatigue test, heating test, dielectric strength test, information English version Railway applications Fixed installations D.C. switchge
14、ar Part 3: Indoor d.c. disconnectors and switch-disconnectors Applications ferroviaires Installations fixes Appareillage courant continu Partie 3: Sectionneurs pour lintrieur et interrupteurs sectionneurs Bahnanwendungen Ortsfeste Anlagen Gleichstrom-Schalteinrichtungen Teil 3: Gleichstrom-Trennscha
15、lter und -Lastenschalter fr Innenrame This European Standard was approved by CENELEC on 1994-12-06. 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.
16、 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 translat
17、ion 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
18、Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B
19、-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 50123-3:1995 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50123-3:1995 BSI 08-1999 2 Foreword This European Standard was prepared by SC 9XC, Electric supply and ea
20、rthing systems for public transport equipment and ancillary apparatus (fixed installations) of 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 CENELEC as EN 50123-3 on 1
21、994-12-06. The following dates were fixed: This Part 3 is to be used in conjunction with EN 50123-1:1995, Railway applications Fixed installations D.C. switchgear Part 1: General. Annexes designated “informative” are given for information only. In this standard, Annex A is informative. latest date b
22、y which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop)1995-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow)1995-12-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:5
23、5:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50123-3:1995 BSI 08-19993 1 Scope This Part of EN 50123 specifies requirements for d.c. disconnectors, switch-disconnectors and earthing switches for use in indoor stationary installations of traction systems. NOTE 1EN 50123-6 specifies requirements
24、 for d.c. switchgear assemblies. NOTE 2EN 50121-5 specifies requirements for electromagnetic compatibility (EMC). NOTE 3EN 50126 specifies requirements for dependability. NOTE 4In this document the word “unit” means “disconnector and/or switch-disconnector and/or earthing switch” as defined in 3.1.3
25、, 3.1.4 and 3.1.5 of EN 50123-1:1995. NOTE 5Disconnectors, switch-disconnectors and earthing switches may have electrically latched mechanism and, in such a case, may be indicated with the current term of “power contactors”. 2 Normative references For the purposes of this standard, the normative ref
26、erences given in EN 50123-1:1995 apply 3 Definitions For the purposes of this standard, the definitions given in EN 50123-1:1995 apply. 4 Service conditions Where service conditions differ from those defined as “normal” in clause 4 and Annex B of EN 50123-1:1995, the purchaser shall state this fact
27、in the tender specification. Where a unit is suitable for use in service conditions different from those defined as “normal” in clause 4 and Annex B of EN 50123-1:1995, the manufacturer shall state this fact. 5 Characteristics of the unit 5.1 Enumeration of the characteristics The characteristics of
28、 the unit and its assigned designations and values (where applicable) are as follows: type of unit (5.2); rated values (5.3); class of use (5.4); auxiliary circuits (5.5). 5.2 Type of unit A unit shall be defined by the following details (where applicable): number of poles; number of positions (if t
29、here are more than two); provision of an enclosure; degree of protection provided by the enclosure (see EN 60529). 5.3 Rated values 5.3.1 General Requirements for the rated characteristics shall be stated by the purchaser as far as the rating for voltages (5.3.2) and minimum acceptable values for ra
30、ting for currents (5.3.3). These values shall be confirmed by the manufacturer, who shall indicate the limit 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 al
31、l the listed rated values. 5.3.2 Voltages A unit is defined by the following rated voltages: a) Nominal voltage (Un) See EN 50163. b) System voltages and limits See 3.2.1 of EN 50123-1:1995. c) Rated voltage (UNe) See 3.2.3 and 5.1.3 of EN 50123-1:1995. d) Rated insulation voltage (UNm) See 3.2.2 of
32、 EN 50123-1:1995. It shall be equal to or higher than Umax. e) Rated impulse withstand voltage (UNi) See 3.2.4 of EN 50123-1:1995. f) Power-frequency voltage withstand level See 3.2.5 of EN 50123-1:1995. The value, derived from EN 50124-1, is considered for a test in dry conditions, provided that un
33、its are used indoors. 5.3.3 Currents A unit is defined by the following rated currents: a) Rated conventional thermal current (Ith Ithe) See 3.2.8 and 3.2.9 of EN 50123-1:1995. b) Rated service current (INe) See 3.2.10 of EN 50123-1:1995. c) Rated breaking and making capacities See 3.2.18 and 3.2.22
34、 of EN 50123-1:1995. 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 lo
35、wer than or equal to this rated breaking capacity. d) Rated short-time withstand current (INew) See 3.2.11 of EN 50123-1:1995. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 08:55:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50123-3:1995 4 BSI 08-1999 5.4 Class of use Disconnectors shall
36、 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 cu
37、rrents of the switch-disconnectors shall be at least those given in Table 1 for the appropriate category of switch-disconnector. Table 1 Categories of switch-disconnectors The above categories may correspond to the following conditions. NOTEA typical application of the above categories is the follow
38、ing: Category I: Switch-disconnector in series with the feeder, suitable to make and break rated current only. Category II: Switch-disconnector as in I, but suitable for making and breaking the train starting current. Category III: Switch-disconnector as in II, but suitable to make under short-circu
39、it. It could be used in place of a rectifier or interconnecting circuit breaker (R or I). Category IV: Switch-disconnector suitable to be used for test or safety purposes as short-circuiting or earthing switch. It could also be used in place of R or I circuit breakers. 5.5 Control circuits The contr
40、ol circuits are identified by the following: the rated voltage of the control circuits; the kind of current (d.c. or a.c.); the current frequency, in case of a.c. The rated voltage of the supply source and its frequency are the values on which the performance, the thermal behaviour and the insulatio
41、n characteristics are based. NOTESupply voltage means the actual voltage measured at the terminals of the unit control circuit when carrying the operating current. The control circuit is taken to include the auxiliary resistors and any accessory (e.g. rectifiers), supplied by the manufacturer or ind
42、icated by the manufacturer as essential for the correct operation of the unit. The rated voltage and the insulation characteristics shall be in accordance with EN 50124-1. The supply voltage shall remain within 80 % and 110 % of the rated voltage according with 5.2 of EN 50123-1:1995. When the contr
43、ol 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 rated voltage. In case of control circuits which draw current intermittently, the duration of the current
44、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 or NC or commutation). Unless otherwise required, the rated voltage shall be in accordance wi
45、th 5.2 of EN 50123-1:1995, the rated insulation voltage according to EN 50124-1 and 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 t
46、o 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 6.1.1 Materials No materials containing asbestos shall be used in the construction of the switchgear. NOTESpecial attention is to be paid to the
47、ability of the material used to resist moisture and fire: materials used should be of the self extinguishing type, such that the risk of propagation of fire from one cubicle to another is minimized. See EN 50123-1:1995, Annex B. All like plant and apparatus, supplied by a manufacturer for a given us
48、e and with the same characteristics, shall be interchangeable as a whole and also as regards its parts. All apparatus and connections for the safe and satisfactory operation, control and protection of the equipment concerned, shall be provided whether or not specifically mentioned. The equipment sha
49、ll be earthed, insulated, screened or enclosed as may be appropriate to ensure the protection of the equipment and 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 50123-1:1995. 6.1.2 Arcing contacts Arcing contacts, if any, which are liable to be consumed during arc interruption shall be easy to replace. Category Capacities (with tc = 10 ms) Short-time withstand current MakingBreakingCurrentDuration IINeINe
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