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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 50123-7-3:1999 The
2、European Standard EN 50123-7-3:1999 has the status of a British Standard ICS 29.200; 29.280 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Railway applications Fixed installations d.c. switchgear Part 7: Measurment, control and protection devices for specific use in d.c. trac
3、tion systems Section 3: Isolating voltage transducers and other voltage measuring devices Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Electrotechnical Sector Committe
4、e, was published under the authority of the Standards Committee and comes into effect on 15 December 1999 BSI 12-1999 ISBN 0 580 32685 3 BS EN 50123-7-3:1999 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the English language version of EN 50123-7
5、-3: 1999. The UK participation in its preparation was entrusted by Technical Committee GEL/9, Railway Electrotechnical Applications, to Subcommittee GEL/9/3, Fixed equipment, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European comm
6、ittee any enquiries 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. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-r
7、eferences The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catal
8、ogue. 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 confer immunity from legal obligations. Summary of pages This document comp
9、rises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CE
10、NELEC European Committee for Electrotechnical Standardization Comite Europe en de Normalisation Electrotechnique Europa isches Komitee fu r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1999 CENELEC All rights of exploitation in any form and by any means reserved
11、 worldwide for CENELEC Members. Ref. No. EN 50123-7-3:1999 E EUROPEAN STANDARDEN 50123-7-3 NORME EUROPE ENNE EUROPA ISCHE NORM March 1999 ICS 29.280 English version Railway applications Fixed installations d.c. switchgear Part 7: Measurement, control and protection devices for specific use in d.c. t
12、raction systems Section 3: Isolating voltage transducers and other voltage measuring devices Applications ferroviaires Installations fixes Accessoires a courant continu Partie 7: Dispositifs de mesurage, de commande et de protection pour usage spe cifique dans les syste mes de traction a courant con
13、tinu Section 3: Transducteurs de tension disolement et autres dispositifs de mesurage de tension Bahnanlagen Ortsfeste Anlagen Gleichstrom Schalteinrichtungen Teil 7: Me-, Steuer- und Schutzeinrichtungen in Gleichstrom-Bahnanlagen Hauptabschnitt 3: Spannungswandler und andere Meeinrichtungen This Eu
14、ropean Standard was approved by CENELEC on 1998-08-01. 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 referen
15、ces 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 mem
16、ber into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
17、Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 50123-7-3:1999 BSI 12-1999 Foreword This European Standard was prepared by SC 9XC, Electric supply and earthing systems for pu
18、blic 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 formal vote and was approved by CENELEC as EN 50123-7-3 on 1998-08-01. The following dates wer
19、e 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) 1999-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1999-10-01 This part 7 is divided into secti
20、ons to cover an application guide and a number of protecting devices with specific features for d.c. railway applications. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions3 4Service conditions3 5Characteristics3 5.1Electrical characteristics3 5.2Mechanical characteri
21、stics4 6Information to be exchanged between purchaser and supplier5 7Tests5 7.1Dielectric tests5 7.2Calibration test5 7.3EMC test5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 50123-7-3:1999 BSI 12-1999 Table 1 Insulation level
22、UnUNmUNiUNiUa(A)Ua(B)ClearanceClearance ABAB kVkVkVkVkVkVmmmm 0,60,967,23,341012 0,751,289,64,35,21417 0,751,610125,56,51820 1,52,31214,46,57,82226 1,5315188,5102733 34,8253012154554 A: to earth between primary and secondary and against other circuits. B: across the isolating distance if applicable.
23、 The above values are taken assuming that the overvoltage category 3 and PD4 as defined in EN 50124-1 are used. Introduction EN 50123-7 is divided in a number of sections as follows. Section 1: Application guide. Section 2: Isolating current transducers and other current measuring devices. Section 3
24、: Isolating voltage transducers and other voltage measuring devices. This number of sections is subject to future additions as soon as a protection device is considered suitable for standard requirements. Section 1 is a guide and its content is informative. Further sections are normative and apply w
25、ith respect to equipment falling within the scope of that section. 1 Scope EN 50123-7-3 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 sens
26、or on the live switchboard conductor or rail and the secondary device, giving galvanic insulation between the input and the output. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at t
27、he 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 th
28、e publication referred to applies (including amendments). EN 50121-5, Railway applications Electromagnetic compatibility Part 5: Emission and immunity of fixed power supply installations and apparatus. EN 50123-1:1995, Railway applications Fixed installations D.C. switchgear Part 1: General. ENV 501
29、23-7-1:1998, Railway applications Fixed installations D.C. switchgear Part 7: Measurement, control and protection devices for specific use in d.c. traction svstems Section 1: Application guide. EN 50124-1, Railway applications Insulation co-ordination Part 1: Basic requirements Clearances and creepa
30、ge distances for all electrical and electronic equipment. EN 50163:1995, Railway applications Supply voltages of traction systems. 3 Definitions The definitions given in clause 3 of EN 50123-1:1995 and in 3.3 of ENV 50123-7-1 apply. 4 Service conditions Where the equipment described in this standard
31、 is mounted on devices or in assemblies covered by the EN 50123 series of standards, the service conditions of the devices or assemblies apply. The normal service conditions are given in EN 50123-1:1995, annex B. 5 Characteristics 5.1 Electrical characteristics 5.1.1 General The isolation transducer
32、 has an insulation level between its primary and secondary terminals, the same as that of the main circuit. An isolation transducer shall have an insulation level in accordance with the following Table 1. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Co
33、py, (c) BSI Page 4 EN 50123-7-3:1999 BSI 12-1999 * Requirement to be specified by the purchaser Transducers intended for location near live conductors shall be provided with an insulated enclosure, unless alternative arrangements are agreed with the purchaser. Its output signal shall preferably be o
34、ne of the appropriate devices described in clause 3 of ENV 50123-7-1. Transducers shall be suitable for providing inputs to measuring devices and/or protection devices. The output impedance, accuracy, linearity of response and phase shift between the input and the output shall be compatible with its
35、 designated application. The frequency range shall be from d.c. to a minimum of 1 kHz. Based on the rated voltage assigned to the device UN, the voltage transducer shall be able to operate correctly at its rated accuracy in the range 0 UNto 1,2 UNwithin the defined tolerance. It is recommended that
36、UNis assigned higher or at least equal to Umax2 (see EN 50163). The input impedance on the primary side shall be 1 MV or as agreed with the purchaser. NOTEIt is recommended that a fuse (preferably accessible from outside the live compartment to provide safe access when the main circuit is still ener
37、gized) is fitted in the transducer primary connection. It is suggested that for systems connected to the transducer secondary, where both the live and the return conductors are unearthed, a second fuse/removable link is fitted between the transducer and the return conductor. Attention shall be paid
38、to EMC emissions and susceptibility in locating the sensor. The preferred secondary signal (specified by the purchaser in accordance with 5.2.4 of ENV 50123-7-1) may either be a voltage in the range from 0 V to 10 V or a current in the range from 0 mA to 20 mA (e.g. 0 mA to 20 mA, 4 mA to 20 mA or 0
39、 mA to 10 mA). When the transducer uses an auxiliary power supply, means shall be provided to indicate that the power supply is not available. If the principle of operation of the transducer is electronic, then self-checking means shall be provided. The need for this requirement depends on the duty
40、of the transducer and will be specified by the purchaser. Attention shall be paid to provide adequate protection of the transducer and associated circuits against overloads and short circuits. Care shall be taken that inductive circuits can alter the inherent di/dt response. 5.1.2 Isolating transduc
41、er requirements The following requirements characterize the isolating transducer: a) Rated input voltage(V); b) Rated insulation voltage(V); c) Input signal at 100 % signal(mV); d) Input impedance at 100 % signal(V); e) Output signal at 100 % signal(mA or mV or V); f) Output impedance at 100 % signa
42、l(V); g) Accuracy range at 100 % signal(%); h) Accuracy( %); i) Upper limit of response frequency(kHz); j) Power frequency withstand voltage (60 s)(kV); k) Impulse withstand (if applicable)(kVcr); l) Power consumption(W); m) Auxlllary voltage(V). n) Loss of auxiliary power signal* o) Electronic circ
43、uitry self checking* 5.1.3 Divider requirements The following requirements characterize the divider and shall be specified: a) Rated insulation voltage(V); b) Output signal at UNm(V); c) Total divider resistance(V); d) Footing divider resistance(V); e) Accuracy range based on UNm(%); f) Accuracy(%);
44、 g) Upper limit of response frequency(kHz); h) Burden(VA). 5.2 Mechanical characteristics The enclosure of the transducer may be metal enclosed, or of insulating material. Both may have earthed metal mounting feet. Mechanical stress caused by the operation of other acting devices within the switchge
45、ar or adjacent to the transducer shall not cause damage or loss of accuracy to the transducer. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 50123-7-3:1999 BSI 12-1999 6 Information to be exchanged between purchaser and supplier
46、The supplier shall, when practicable, fulfil the requirements specified in 5.1.2 and 5.1.3 as far as they are applicable, and the purchaser shall confirm or complement these requirements as necessary. If requested the following information shall be provided by the supplier in addition to the require
47、ments specified above: a) Insulation levels of the circuits; b) Accuracy range and tolerances; c) Overvoltage capability; d) Input impedance; e) Output impedance; f) Input impedance of the device connected to the secondary side of the transducer; g) Thermal deviation of the secondary signal expresse
48、d per 8C; h) If inversion of polarity in the auxiliary supply may damage the device; i) Burden. A rating plate shall be provided with at least the following: conversion ratio, insulation level, serial number and manufacturers name. 7 Tests 7.1 Dielectric tests The power-frequency voltage withstand t
49、est shall be a routine test. The voltage shall be applied between all auxiliary power supply terminals and the primary side and between the secondary terminals and the auxiliary power supply. An impulse test for transducers used on systems having UNmgreater than 2,5 kV is a type test made between the input terminals and all other terminals including the transducer mounting feet. Power frequency test values shall be taken from Table 1. 7.2 Calibration test This is a routine test. Linearity shall be checke
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