EN 50123-6:2003/A1:2014

SLOVENSKI STANDARD
SIST EN 50123-6:2003/oprAA:2013
01-maj-2013
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Railway applications - Fixed installations - D.C. switchgear -- Part 6: D.C. switchgear
assemblies
Bahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen -- Teil 6:
Gleichstrom-Schaltanlagen
Applications ferroviaires - Installations fixes - Appareillage à courant continu -- Partie 6:
Ensembles d'appareillage
Ta slovenski standard je istoveten z: EN 50123-6:2003/prAA:2013
ICS:
29.130.99 Druge stikalne in krmilne Other switchgear and
naprave controlgear
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
SIST EN 50123-6:2003/oprAA:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 50123-6:2003/oprAA:2013

SIST EN 50123-6:2003/oprAA:2013
DRAFT
EUROPEAN STANDARD
EN 50123-6
prAA
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 29.130.99; 29.280
English version
Railway applications -
Fixed installations -
D.C. switchgear -
Part 6: D.C. switchgear assemblies

Applications ferroviaires -  Bahnanwendungen -
Installations fixes - Ortsfeste Anlagen -
Appareillage à courant continu - Gleichstrom-Schalteinrichtungen -
Partie 6: Ensembles d'appareillage Teil 6: Gleichstrom-Schaltanlagen

This draft amendment prAA, if approved, will modify the European Standard EN 50123-6:2003; it is submitted to
CENELEC members for CENELEC enquiry.
Deadline for CENELEC: 2013-08-09.

It has been drawn up by CLC/SC 9XC.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal
Regulations which stipulate the conditions for giving this amendment the status of a national standard without any
alteration.
This draft amendment was established by CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change
without notice and shall not be referred to as a European Standard.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Project: 23568 Ref. No. EN 50123-6:2003/prAA:2013 E

SIST EN 50123-6:2003/oprAA:2013
EN 50123-6:2003/prAA:2013
1 Contents Page
2 Foreword. 3
3 2 Normative references . 4
4 3 Definitions . 4
5 8 Tests. 4
6 8.2 List of the applicable tests . 4
7 8.3 Performance of tests . 4
8.3.9 Internal arc test . 4
9 Annex B (normative) Method for testing under conditions of arcing due to an internal fault . 5
10 B.1 Purpose of the test . 5
11 B.2 Characteristics – Rated short-circuit current under internal arcing conditions (I ). 5
Narc
12 B.3 Test arrangements . 5
13 B.3.1 Test specimen . 5
14 B.3.2 Test circuit . 6
15 B.3.3 Voltage . 6
16 B.3.4 Duration of the test . 7
17 B.4 Test procedure . 7
18 B.4.1 Supply circuit . 7
19 B.4.2 Arc initiation . 7
20 B.4.3 Indicators . 8
21 B.4.4 Repetition of the test . 8
22 B.5 Assessment of the test . 9
23 B.6 Test report . 9
24 Bibliography . 14
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EN 50123-6:2003/prAA:2013
27 Foreword
28 This document [EN 50123-6:2003/prAA:2013] has been prepared by CLC/SC 9XC "Electric supply and
29 earthing systems for public transport equipment and ancillary apparatus (Fixed installations)".
30 This document is currently submitted to the Enquiry.
31 This amendment was elaborated to provide guidance to the requirement of 6.6.3, Internal arcing, that gas or
32 vapour escaping under pressure does not endanger operating staff.
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EN 50123-6:2003/prAA:2013
33 2 Normative references
34 Add the following references:
35 EN 50123-1:2003, Railway applications – Fixed installations – D.C. switchgear – Part 1: General
36 EN 50123-7-1:2003, Railway applications – Fixed installations – D.C. switchgear – Part 7-1: Measurement,
37 control and protection devices for specific use in d.c. traction systems – Application guide
38 3 Definitions
39 Replace Clause 3 by the following:
40 3 Terms and definitions
41 For the purposes of this document, the terms and definitions given in EN 50123-1:2003 and the following
42 apply.
43 3.1
44 internal arc
45 arcing within a switchgear assembly arising from a fault between active parts and/or between active parts and
46 other conductive parts
47 3.2
48 rated short-circuit current under internal arcing conditions (I )
Narc
49 current, during the test duration/150 ms, indicating the maximum allowable value of sustained short-circuit
50 current at the terminals of the incoming unit for which the requirements of this test specification are fulfilled
51 Note 1 to entry: The value is the maximum value of the prospective sustained short-circuit current.
52 3.3
53 compartment under test
54 compartment of a switchgear assembly which is subject to an internal arc test
55 8 Tests
56 8.2 List of the applicable tests
57 Add the following at the end of Table 2:
Internal arc test Type, optional 8.3.9
59 8.3 Performance of tests
60 Add the following after 8.3.8:
61 8.3.9 Internal arc test
62 The internal arc test is an optional type test. The test shall be performed according to the procedure specified
63 in Annex B. The criteria for successful passing are given in B.5.
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EN 50123-6:2003/prAA:2013
64 Add the following after Annex A:
65 Annex B
66 (normative)
68 Method for testing under conditions of arcing due to an internal fault
69 B.1 Purpose of the test
70 Annex B applies to metal-enclosed d.c. switchgear assemblies - hereafter called ASSEMBLIES - used in
71 indoor stationary installations.
72 The test procedure described below is intended
73  to assess the ability of the ASSEMBLY to limit the risk of personal injury,
74  to verify the effectiveness of the design in protecting persons,
75 in case of an internal arc.
76 The testing conditions take into account that ASSEMBLIES are installed in areas restricted to authorised
77 personnel.
78 NOTE This is equivalent to accessibility class A of EN 62271-200:2012.
79 B.2 Characteristics – Rated short-circuit current under internal arcing
80 conditions (I )
Narc
81 Value of the rated short-circuit current shall be equal to the rated earth fault current I . The peak of the
Ncwe
82 short-circuit current value is conventionally assumed to be 1,42 times the prospective sustained short-circuit
83 current (fault of negligible impedance).
84 NOTE The current level during internal arcing depends on the earthing of the switchboard frame (see
85 EN 50123-7-1:2003, 6.5.7). High fault currents can be expected where the switchboard frame is
86 – directly connected to the return circuit as shown in EN 50123-7-1:2003, 6.5.7, Figure 4b, or
87 – connected to substation earth as shown in EN 50123-7-1:2003, 6.5.7, Figure 4a, and a fast acting,
88 – voltage limiting device is installed between substation earth and the return circuit.
89 Lower fault currents can be expected where the bedding resistance of the track and the earth resistance limit the fault
90 current
91 B.3 Test arrangements
92 B.3.1 Test specimen
93 The test shall be carried out on representative samples. In case of an ASSEMBLY with a continuous main
94 busbar, consisting of extensible (modular) standalone units, the test specimen shall consist of minimum three
95 units connected together as in service.
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EN 50123-6:2003/prAA:2013
96 The following points shall be observed.
97  The test shall be carried out on a test specimen not previously subjected to an arcing test or on a
98 specimen cleaned and prepared accordingly. The specimen and the equipment in it may be repaired or
99 replaced before each test.
100 NOTE Degradation of insulation due to carbonisation or moderate erosion of metal parts is not necessarily
101 considered to render a unit unsuitable for a further test.
102  The test specimen shall be placed in an open area and shall be fixed by its designed means.
103  Vertical indicators shall be installed all around.
104  A ceiling shall be located at a distance of (200 ± 50) mm from the upper part of the test specimen unless
105 differently stated by the manufacturer.
106 If a test specimen includes a roof according to the following specification and as shown in Figure B.1 it
107 shall be tested with the roof installed and an additional ceiling is not required. The roof
108  covers the top surface completely and
109  is of a protection degree of IPX1 or higher and
110  mounted at minimum distance to the top of the ASSEMBLY lower than 200 mm.
111  The test specimen shall be fully equipped. Earthing and bonding shall be as for normal service.
112  Mock-ups of internal components are permitted provided that
113  they have the same volume and shape, and a similar external material as the original items,
114  any metallic external material is earthed in a similar manner to normal service.
115  All doors and covers provided are closed.
116  The test specimen shall be earthed at the earthing point provided.
117  Secondary devices need not be installed if inside a separate compartment for control circuits. Means for
118 wiring from the control compartment to the compartment under test shall be installed.
119 B.3.2 Test circuit
120 A typical diagram of the test circuit is shown in EN 50123-1:2003, Figure A.1, with typical calibration and
121 characteristics shown in EN 50123-1:2003, Figure A.2. The supply source S feeds a circuit comprising
122 adjustable resistors R, adjustable reactors L and the test object A.
123 If the supply source is not a generator, then the minimum converter pulse number shall be 6 with a minimum
124 supply frequency of 50 Hz.
125 The test circuit shall produce a peak current with the characteristic illustrated as calibration 1 in
126 EN 50123-1:2003, Figure A.2.
127 B.3.3 Voltage
128 The applied voltage of the test circuit shall be equal to the rated voltage U .
Ne
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129 B.3.4 Duration of the test
130 The test duration shall be 150 ms.
131 B.4 Test procedure
132 B.4.1 Supply circuit
133 The test sample is connected and supplied corresponding to the normal service arrangement. The earthing of
134 the enclosure
...