prEN 50443
(Main)Effects of electromagnetic interference on pipelines caused by high voltage a.c. railway systems and/or high voltage a.c. power supply systems
Effects of electromagnetic interference on pipelines caused by high voltage a.c. railway systems and/or high voltage a.c. power supply systems
Transferred to SC 9XC/TC 210 JWG * D127/050 + D130/092: Extension of target date approved until 2008-05-01 * Enquiry results and comments to be reviewed during meeting of May 2010 * D135/064 (Benchmark 3): BT decided to set the project back to PWI stage with release of standstill * see PR=23055
Auswirkungen elektromagnetischer Beeinflussungen von Hochspannungswechselstrombahnen und/oder Hochspannungsanlagen auf Rohrleitungen
Effets des perturbations electromagnétiques sur les canalisations causées par les lignes ferroviaires en courant alternatif et/ou par les lignes électriques H.T. en courant alternatif
Učinki elektromagnetne interferece na cevovode, ki jih povzročajo visokonapetostni izmenični železniški sistemi in/ali visokonapetostni izmenični močnostni napajalni sistemi
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 50443:2009
01-julij-2009
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Effects of electromagnetic interference on pipelines caused by high voltage a.c. railway
systems and/or high voltage a.c. power supply systems
Auswirkungen elektromagnetischer Beeinflussungen von
Hochspannungswechselstrombahnen und/oder Hochspannungsanlagen auf
Rohrleitungen
Effets des perturbations electromagnétiques sur les canalisations causées par les lignes
ferroviaires en courant alternatif et/ou par les lignes électriques H.T. en courant alternatif
Ta slovenski standard je istoveten z: prEN 50443
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
oSIST prEN 50443:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50443:2009
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oSIST prEN 50443:2009
DRAFT
EUROPEAN STANDARD
prEN 50443
NORME EUROPÉENNE
May 2009
EUROPÄISCHE NORM
ICS 33.040.20; 33.100.01
English version
Effects of electromagnetic interference on pipelines caused
by high voltage a.c. railway systems and/or high voltage a.c.
power supply systems
Effets des perturbations Auswirkungen elektromagnetischer
electromagnétiques sur les canalisations Beeinflussungen von
causées par les lignes ferroviaires Hochspannungswechselstrombahnen
en courant alternatif et/ou par les lignes und/oder Hochspannungsanlagen
électriques H.T. en courant alternatif auf Rohrleitungen
This draft European Standard is submitted to CENELEC members for CENELEC enquiry.
Deadline for CENELEC: 2009-09-11.
It has been drawn up by CLC/SC 9XC.
If this draft becomes a European Standard, 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.
This draft European Standard 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
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
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Project: 11656 Ref. No. prEN 50443:2009 E
Draft for Enquiry
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oSIST prEN 50443:2009
prEN 50443:2009 – 2 –
1 Foreword
2
3 This draft European Standard was prepared by a JWG between SC 9XC, Electric supply and earthing
4 systems for public transport equipment and ancillary apparatus (Fixed installations), of Technical
5 Committee CENELEC TC 9X, Electrical and electronic applications for railways and the Technical
6 Committee CENELEC TC 210, Electromagnetic compatibility (EMC). It is submitted to a second
7 CENELEC enquiry.
8
9 This European Standard gives limits relevant to the electromagnetic interference produced by high voltage
10 a.c. railway and power supply systems on metallic pipelines.
11 Limits are relevant to the interference which can be tolerated on the metallic pipeline, by the equipment
12 connected to it and by people working on them or in contact with them.
13
14 This European Standard indicates the electromagnetic interference situations to which the limits must be
15 related.
16
17 Suggestions concerning the interference situations to be examined are given in Annex A. Suggestions
18 concerning the appropriate calculation methods are given in Annex B. Suggestions concerning the appropriate
19 measurement methods are given in Annex C. Suggestions about the use of mitigation measures are given in
20 Annex D. Suggestions for management of interference are given in Annex E.
21
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22 Contents
23
24 1 Scope . 4
25 2 Normative references . 4
26 3 Definitions . 5
27 4 Procedure . 7
28 5 Interference distance . 8
29 5.1 Interference distance for normal operating conditions . 8
30 5.2 Interference distance for fault condition . 8
31 6 Parameters of the interference situations . 9
32 7 Coupling types . 9
33 8 Interference effects . 10
34 9 Interference results. 10
35 10 Limits for permissible interference . 10
36 10.1 General . 10
37 10.2 Limits related to electrical safety of people . 10
38 10.3 Limits related to damage to the pipeline system . 11
39 10.4 Limits related to disturbance of the pipeline system. 12
40 11 Evaluation of the interference results . 12
41 12 Mitigation measures . 12
42 Annex A (informative) Interference situations . 13
43 Annex B (informative) Calculation methods . 14
44 B.1 Introduction . 14
45 B.2 Configuration of the a.c. railway system . 14
46 B.3 Configuration of the a.c. power supply system . 15
47 B.4 Configuration of the pipeline . 15
48 B.5 Calculation methods . 16
49 B.6 Calculation of independent interfering systems . 17
50 Annex C (informative) Measuring methods . 18
51 C.1 General . 18
52 C.2 Measurement methods for (prospective) touch voltages at steady state . 18
53 Annex D (informative) Mitigation measures . 19
54 D.1 General . 19
55 D.2 Mitigation measures at the pipeline side . 19
56 D.3 Mitigation measures at the a.c railway system side . 20
57 D.4 Mitigation measures at the a.c. power supply system side . 20
58 Annex E (informative) Management of interference . 21
59 E.1 General . 21
60 E.2 Plant life . 21
61 E.3 Exchange of information . 21
62 E.4 Plant documentation . 21
63 Tables
64 Table 1 - Interference distances . 8
65 Table 2 - Coupling types and distances to be considered . 9
66 Table 3 - Limits for interference voltages measured versus earth or across the joints (r.m.s. values)
67 related to danger to people . 11
68
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69 1 Scope
70 The presence of ac power supply systems or of ac railway systems, in the following also indicated as ac
71 power systems, may cause voltages to build up in pipeline systems, in the following indicated as
72 interfered systems, running in the close vicinities of the systems above, due to one or more of the
73 following mechanisms, i.e. to
74 − inductive coupling,
75 − conductive coupling,
76 − capacitive coupling.
77
78 Such voltages may cause danger to the people, damage to the pipeline or to the connected equipment,
79 disturbance to the electric/electronic equipment connected to the pipeline.
80
81 This European Standard deals with the situations where this effect may arise and with the maximum
82 tolerable limits of the interference effects, taking into account the behaviour of the ac power systems
83 both: in normal operating condition and/or during the faults.
84
85 This European Standard applies to all metallic pipelines irrespective of the conveyed fluid, e.g. liquid or
86 gas, liable to be influenced by high voltage a.c. railway and high voltage a.c. power supply systems.
87
88 The objective of this standard is to define the types of coupling which must be considered for operating
89 conditions of the high voltage a.c. railway systems and high voltage a.c. power supply systems. It also
90 defines the configurations to be considered for both
91 − the metallic pipeline,
92 − the high voltage a.c. railway systems or high voltage a.c. power systems
93 and the limits to the voltage resulting from the coupling.
94
95 This European Standard is applicable to all new metallic pipelines and all new high voltage a.c. railway
96 systems and high voltage a.c. power supply systems and all major modifications that may change
97 significantly the interference effect.
98
99 This European Standard only relates to phenomena at the fundamental power frequency (e.g. 50 Hz or
100 16,7 Hz).
101
102 This European Standard does not apply to
103 − all aspects of corrosion,
104 − the coupling from a.c. railway and power supply systems with nominal voltages less or equal 1 kV,
105 − interference effects on the equipment through parts or apparatus not connected to the pipeline.
106
107 This European Standard does not deal with costs and cost-sharing of investigations and mitigation
108 measures.
109
110 2 Normative references
111 The following referenced documents are indispensable for the application of this document. For dated
112 references, only the edition cited applies. For undated references, the latest edition of the referenced
113 document (including any amendments) applies.
114
115 EN 50110-1:2004, Operation of electrical installations
116
1)
117 EN 50122-1 , Railway applications – Fixed installations – Electrical safety, earthing and bonding –
118 Part 1: Protective provisions against electric shock
119
120 HD 384.6.61 S2:2003, Electrical installations of buildings -- Part 6-61: Verification - Initial verification
121 (IEC 60364-6-61:1986 + A1:1993 + A2:1997, mod.)
1)
At draft stage.
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122
123 IEC 60050-161:1990 + A1:1997 + A2:1998, International Electrotechnical Vocabulary - Chapter 161:
124 Electromagnetic Compatibility
125
126 ITU-T Directives:1989, Directives concerning the protection of telecommunication lines against harmful
127 effects from electric power and electrified railway lines - Volumes 1, 2, 3, 4, 5, 7, 8, 9
128
129 ITU-T K.68:2008, Management of electromagnetic interference on telecommunication systems due to
130 power systems and operators' responsibilities
131
132 3 Definitions
133 For the purposes of this document, the following terms and definitions apply. Unless defined in this
134 European Standard, the definitions given in the IEV shall be applicable.
135
136 3.1
137 a.c. railway system (a.c. electric traction system according to EN 50122-1)
138 a.c. railway electrical distribution network used to provide energy for rolling stock
139
140 NOTE The system may comprise
141 - contact line systems,
142 - return circuit of electric railway systems,
143 - running rails of non-electric railway systems, which are in the vicinity of, and conductively connected to the running rails of an
144 electric railway system.
145
146 3.2
147 a.c power supply system
148 a.c. electrical system devoted to electrical energy transmission and including overhead lines, cables,
149 substations and all apparatus associated with them
150
151 NOTE This includes the HV transmission lines with 16,7 Hz
152
153 3.3
154 interfering system
155 general expression encompassing an interfering high voltage a.c. railway system and/or high voltage a.c.
156 power supply system
157
158 3.4
159 interfered system
160 system on which the interference effects appear: In this standard pipeline system
161
162
163 3.5
164 pipeline system
165 system of metallic pipework with all associated equipment and stations up to and including the point of
166 delivery
167
168 NOTE The associated equipment is the equipment electrically connected to the pipeline.
169
170 3.6
171 earth
172 the conductive mass of the earth, whose electric potential at any point is conventionally taken as equal to
173 zero [IEC 50 826-04-01]
174
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175 3.7
176 operating condition
177 operation of any system where transients coming from faults are not to be considered as an operating
178 condition but a fault condition
179
180 3.8
181 fault condition
182 non intended condition caused by short-circuit. The time duration is terminated by the correct function of
183 the protection devices and switches
184
185 NOTE 1 For the relevant fault duration the correct operation of protection devices and switches is taken into account
186 NOTE 2 The short circuit is an unintentional connection of an energized conductor to earth or to any metallic parts in contact
187 with earth.
188
189 3.9
190 conductive coupling
191 conductive coupling or resistive coupling occurs when part of the current belonging to the interfering
192 system returns to the system earth via the interfered system.
193 The results of galvanic coupling are conductive voltages and currents
194
195 3.10
196 inductive coupling
197 the phenomenon whereby the magnetic field produced by a current carrying conductor influences another
198 conductor; the coupling being quantified by the mutual inductive impedance of the two conductors.
199 The results of inductive coupling are induced voltages and hence currents. These voltages and currents
200 depend for example on the distances, length, inducing current, conductor arrangement and frequency
201
202 3.11
203 capacitive coupling
204 the phenomenon whereby the electric field produced by an energized conductor influences another
205 conductor; the coupling being quantified by the capacitive impedance between the conductors and the
206 capacitive impedances between each conductor and earth.
207 The results of capacitive coupling are influenced voltages into conductive parts or conductors insulated
208 from earth. The influenced voltages depend for example on the voltage of the influencing system and
209 distance
210
211 3.12
212 interference
213 phenomenon resulting from conductive, capacitive, inductive coupling between systems, and which can
214 cause malfunction, disturbance danger, damage, etc
215
216 3.13
217 disturbance
218 malfunction of an equipment loosing its capability of working properly for the duration of the interference.
219 When the interference disappears, the interfered system starts again working properly without any
220 external intervention
221
222 3.14
223 damage
224 permanent reduction in the quality of service which can be offered by the interfered system
225
226 3.15
227 danger
228 effect which is able to produce a threat to human life
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229
230 3.16
231 interference situation
232 a situation in which an interference may appear (permanently or intermittently) between an a.c. power
233 system and a metallic pipeline system. A given interference situation is defined by the geometrical and
234 electrical data of the a.c. power system and of the metallic pipeline system as well as by the data
235 describing the medium between the two systems
236
237 3.17
238 interference distance
239 maximum distance between the pipeline and a.c. power system for which an interference shall be
240 considered
241
242 3.18
243 interference voltage
244 voltage caused on the interfered system by the electromagnetic coupling with the nearby interfering
245 system between a given point and the earth or across insulating element
246
247 3.19
248 prospective touch voltage
249 voltage between simultaneously accessible conductive parts when those conductive parts are not being
250 touched by a person or an animal
251
252 3.20
253 immunity
254 ability of a device, equipment or system to perform without degradation in the presence of an
255 electromagnetic disturbance
256 [IEC 60050-161]
257
258 3.21
259 environmental reduction factor
260 factor which represents the mitigation of interference voltage associated with the presence of extraneous
261 metallic structures
262
263 3.22
264 rural area
265 area which has a low density of local metal structures in direct electrical contact with the soil
266
267 3.23
268 urban area
269 area which contains a high density of local metallic structures in direct electrical contact with the soil such
270 as water pipes, cables with bare metal sheaths, railway tracks, earthing structures of buildings, masts
271 and foundations
272 4 Procedure
273 In order to evaluate the acceptability of an interference produced by an a.c. power system on a metallic
274 pipeline, the following design steps apply:
275 a) define the interference distance to be considered, according to Clause 5;
276 b) define the interference situations to be examined (worst case interference), according to Clause 6;
277 c) select the involved coupling type(s) to be considered, according to Clause 7;
278 d) select the involved interference effect(s) to be considered, according to Clause 8;
279 e) assess the interference result(s) for each effect selected in the previous step, according to Clause 9;
280 f) select the acceptable limit for each of the results assessed in the previous step, according to
281 Clause 10;
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282 g) select the most restrictive limit, in case more than one effect is to be taken into account;
283 h) evaluate the interference results on the metallic pipeline by calculation or measurement, according
284 to Clause 11;
285 i) compare the interference results with the relevant limits. If the comparison shows that the
286 interference situation is unacceptable, mitigation measures shall be applied, according to Clause 12.
287
288 The procedure shall be carried out twice, i.e. considering short term interference (due to a.c. power
289 system in fault conditions) and long term interference (due to a.c. power system in operating conditions).
290
291 All design steps have to be agreed by the involved parties.
292 5 Interference distance
293 5.1 Interference distance for normal operating conditions
294
295 5.1.1 In rural areas, for soil resistivity below 3 000 Ωm, an interference distance of 1 000 m between
296 the interfering system and the metallic pipeline has to be considered. In case of soil resistivity value
297 greater than 3 000 Ωm, the interference distance value, in m, is equal to the soil resistivity value, in Ωm,
298 divided by 3.
299
300 5.1.2 In urban areas, the previous interference distance may be decreased, taking into account the
301 environmental reducing factor of the metallic structures existing in these areas. In no case shall the
302 interference distance be assumed to be less than 300 m.
303
304 NOTE Typical values for the environmental reducing factor are 0,1 to 0,7 (see ITU-T K68 , Appendix II).
305 5.2 Interference distance for fault condition
306
307 5.2.1 In rural areas, for soil resistivity below 3 000 Ωm, an interference distance of 3 000 m between
308 the interfering system and the metallic pipeline has to be considered. In case of soil resistivity value
309 greater than 3 000 Ωm, the interference distance value, in m, is equal to the soil resistivity value in Ωm.
310
311 5.2.2 In urban areas, for soil resistivity below 3 000 Ωm, the interference distance is not less than
312 300 m. For soil resistivity greater than 3 000 Ωm the interference distance, in m, is equal to the soil
313 resistivity value, in Ωm, divided by 10.
314
315 NOTE 1 For fault condition and for a.c. power supply systems, the above distances apply in the case of neutral solidly earthed or
316 earthed through small impedance. For a.c. power supply systems with compensated neutral or neutral ungrounded, interference
317 effects are negligible.
318 NOTE 2 The soil resistivity to be taken into account in defining the value of the interference distance is the one of the deep
319 layers of soil (as deep as needed for interference calculations).
320
321 National rules determining other interference distances may be applied.
322
323 Table 1 summarises the above statements.
324
325 Table 1 - Interference distances
a
Areas Interference distance
ρ
m
Ω m
Normal operation Fault condition
> 3 000
Rural ρ/3 ρ
≤ 3 000 1 000 3 000
> 3 000 ρ/10
Urban
≥ 300
≤ 3 000 ≥ 300
a
For underground power supply systems as well as for underground a.c. railway systems the interference distance is 50 m.
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326 6 Parameters of the interference situations
327 When dealing with a metallic pipeline system coupled with an a.c. power system, only acceptable
328 interferences are allowed.
329
330 It means that, in general, interference situations within the interference distance shall be investigated, in
331 order to be sure that all the possible unacceptable interferences, if any, are turned into acceptable ones,
332 by adopting suitable mitigation measures.
333
334 In Annex A suggestions are given on how to select the set of interference situations to be investigated
335 and examples of worst case interference.
336 7 Coupling types
337 Table 2 defines the coupling types requiring calculation and/or measurement for evaluating the
338 acceptability of the interference situation and maximum distances to be considered for the calculations.
339 Distances do not correspond in any case to worst cases but result from a compromise between the
340 opportunity to avoid useless calculations and the feedback experience of the operation.
341
342 Table 2 - Coupling types and distances to be considered
Metallic pipeline
Above ground
Underground
Not electrically Electrically
connected to earth connected to earth
Normal Fault Normal Fault Normal Fault
operation condition operation condition operation condition
Inductive Inductive Inductive Inductive Inductive Inductive
a b
Capacitive --- --- --- --- ---
c d c e c d c e
--- Conductive Conductive Conductive Conductive
a
Capacitive coupling from a railway system has to be considered in case of approach at a distance lower than
- 10 m in case of 15 kV, 16,7 Hz systems,
- 50 m in case of 25 kV, 50 Hz systems.
b
Capacitive coupling from a.c. power supply systems shall be considered in case of approach at a distance lower than 100 m.
c
Conductive coupling from an a.c. railway system shall be considered in case of crossing or approach at a distance lower than 5 m
from the nearest rail or masts or metallic components connected to the rails.
d
Not to be considered for the a.c. power supply systems.
e
Conductive coupling from a.c. power supply systems shall be considered in case of approach at a distance lower than
- 5 m from the closest visible part of the tower of a HV power line rated at 50 kV or less,
- 20 m from the closest visible part of the tower of a HV power line provided with earth wire(s) with nominal voltage greater than
50 kV,
- 100 m from the closest visible part of the tower of a HV power line not provided with earth wire(s) with nominal voltage greater
than 50 kV,
- 20 m from earthing systems of HV power cables with nominal voltage greater than 50 kV,
- 150 m from the earthing grid of a power substation.
In any case a minimum distance of 2 m from the closest part of the earthing system of a tower shall be observed.
In case any metallic part connected to the pipeline is accessible to people, conductive coupling has to be considered within the
interference distance (see Clause 5).
NOTE It is assumed that fault current values associated with isolated and resonant earthed systems are low and do not result in
danger or in significant risk of damage or disturbance and calculations or measurements are only required when interference
occurs.
343
344 For pipelines without longitudinal electrical continuity, e.g. cast iron pipelines, interference effects are
345 negligible.
346
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347 8 Interference effects
348 The effects to be considered are the following:
349 a) danger to people who come in direct contact or contact trough conductive parts with the metallic
350 pipeline or the connected equipment;
351 b) damage of the pipeline or to the connected equipment;
352 c) disturbance of electrical/electronic equipment, connected to the pipeline.
353
354 The pipeline company shall apply electrical/electronic systems such that they will not react in dangerous
355 ways, nor in ways which will stop production, to the short-time voltages and currents which appear during
356 short circuits on the a.c. power system.
357
358 According to what is stated in the Scope, this Standard does not deal with the possible damages caused
359 by interference through the mechanism of a.c. corrosion.
360
361 The effects danger, damage and disturbance are only related to the m
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