44577023 en 50119 01 railway applications fixxed installations electric traction overhead contact...

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPAISCHE NORM June 2001

Engiish version

Railway applications - Fixed installations -

Electric traction overhead contact lines

Applications ferroviaires - Installations fixes - Lignes aériennes de contact pour la traction électrique

Bahnanwendungen - Ortsfeste Anlagen - Oberleitungen für den elektrischen Zugbetrieb

This European Standard was approved by CENELEC on 2000-11-01. CENELEC members are bound to compiy with the CENICENELEC Internai 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 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 officiai 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 Centrai Secretariat has the same status as the officiai versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark. Finland. France. Germany, Greece, Iceland. Ireland. Italy. Luxembourg, Netherlands, Norway. Portugal, Spain, Sweden. Swikerland and United Kingdom.

CENELEC European Committee for Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europaisches Komitee fur Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

@ 2001 CENELEC - All righls of exploitation in any fom and by any means reserved woridwide for CENELEC rnembers.

Ref. No. EN 50119:2001 E

Foreword

This European Standard was prepared by SC 9XC, Electnc supply and earthing systerns for public i transport equiprnent and ancillary apparatus (fixed instailatlons), of the Technical Cornmiitee CENELEC TC 9X, Electdcal and electronic applications for railways.

5

The text of the draft was submitted to the fonnal vote and was approved by CENELEC as EN 50119 on 2000-11-01. 1

I I

The following dates were fixed: s

- latest date by which the EN has to be irnplemented at national (dop) 2002-01-01 level by publication of an identical national standard or by endorsement

- latest date by which the national standards conflicting with the (dow) 2003-11-01 EN have to be withdrawn

Annexes designated "normative" are part of the body of the standard. Annexes designated "informative" are given for information only. In this standard, annexes A and B are normative.

This European Standard has been prepared under a mandate (M024) given to CENELEC by the European Commission and supports the Public Procurement Directive, 93138lEEC.

References to definitions in IEC 60050-811 in clause 3 are included for user reference and in some cases rnay update or modify the current definition.

Contents

1 Scope ...................................................................................................................... 5

2 Normative references ........................ .. ................................................................... 5

3 Definitions ............................................................................................................... 6

3.1 Systems .......................................................................................................... 6 3.2 Conductors ...................................................................................................... 7 3.3 Electrical ........................................................................................................ 9 3.4 Mechanical ................................................................................................. I O

3.5 Support ......................................................................................................... Il 3.6 Cornponent ............... .. ............................................................................... II 3.7 Current collection .......................................................................................... 12

............................................................................. 4 Overhead contact iine systerns 12

4.1 Generai ...................................................................................................... 12 4.2 Systern design ............................................................................................... 12 4.3 Overhead line equiprnent and cornponents ...................................................... 12

.......................................................................................... 4.4 Installation design 13 4.5 Construction .................................................................................................. 13

5 System design ...................................................................................................... 13

.............................................................................. 5.1 Fundamental design data 13 5.2 Requirernents of the overhead contact line systern ........................................... 15

.............................................................................. 5.3 Presentation of the design 26 ........................................................................... 5.4 Dernonstration of conformity 27

6 Overhead contact line equiprnent and components ................................................... 27

6.1 General ......................................................................................................... 27 6.2 insuiators ...................................................................................................... 28 6.3 Grooved contact wire ..................................................................................... 29 6.4 Other wires .................................................................................................. 30 6.5 Droppers ....................................................................................................... 30 6.6 Supporting assemblies ................................................................................... 31 6.7 Clamps. splices and other in-line tension fittings .............................................. 32 6.8 Electrical connections .................................................................................... 33 6.9 Sectioning devices ......................................................................................... 33 6.1 0 Switches and protection devices ..................................................................... 34

. . ........................................................................................ 6.1 1 Tensioning devices 34 6.1 2 Registration assernblies ................................................................................. 34 6.13 Fixed anchor restraints ................................................................................... 35 6.14 Structures ..................................................................................................... 35 6.15 Foundations .................................................................................................. 36 6.16 Presentation and drawing standards ................................................................ 37

7 Installation design .................................................................................................. 37

7.1 General ......................................................................................................... 37 7.2 Route details ................................................................................................. 37 . . 7.3 Sectioning ..................................................................................................... 37 7.4 Layout ........................................................................................................... 38 7.5 Presentation .................................................................................................. 38 7.6 Deviation from system and component design ................................................. 39

8 Construction ........................................................................................................ 39

8.1 Client interfaces .......................................................................................... 39 . . 8.2 Principal methodologies ............................ ............ ......................................... 40

8.3 Redundant materiai disposai .......................................................................... 40

8.4 Recommended rnaterial suppiiers .............................. .. ................................. 40 8.5 Acceptance parameters .................................................................................. 41 . . 8.6 Energization notice ..................................................................................... 41

. . . 8.7 Commissioning .............................................................................................. 42

............. 8.8 Operation and maintenance documentation .................................. .... 42 8.9 Handover ...................................................................................................... 42

..................... ................................. Annex A (normative) Environmental conditions ....... 43

A . l Environmental pararneters ......... .. ................................................................ 43 A.2 Wind pressure ............................................................................................. 43 A.3 Precipitation (snow. ice. hurnidity) .................. .. ........................................... 43 A Ambient temperature .......... .. ........................................................................ 43 . . ............................................................................................... A.5 Solar radiation 43 A.6 Pollution .................. .. .................................................................................. 43

.................................................................................. A.7 Additional requirements 44 Annex B (normative) Temperature rise in conductors ..................................................... 45

........................ B.l Electrical design of the conductor system ........................... .. 45 Bibliography ................................................................................................................. 46

Table 1 . Contact force ............................................................................................. 16

Table 3 . Factor KLoad for grooved contact wires ........................................................ 18

.................................................................. Table 4 . Factor Kt.., for stranded wlres 19

Table 5 . Factor Kwlnd for stranded wires ................................................................... 20

Table 6 . Factor Ki .. for stranded wires .................................................................... 20

.................................. Table 7 . Factor Kradius for ropes of non-conducting materials 22

Table 8 . Contact wire gradients ................................................................................ 23

Table 9 . Electrical clearances .................................................................................. 25

.......................................................................... Table 10 - Phase voltage clearance 25

................................................................................................. Table A.1 - Pollution 44

Table 0.1 - Maximum acceptable temperatures over which the mechanical ........................................................... properties of the material can be impaired 45

1 Scope

This European Standard applies for the design and construction of electnc traction overhead contact lines in railway and tramway appiications (see clause 4).

The standard is intended to be used by the system designer for the new construction of electric traction overhead contact lines or for the compiete transformation of existing iines according to the c client performance objectives. This document does not deal in detail with raiiway traction eiectrical 1 , supply systems or EMC requirements and is not applicable to feeders which are remote from the ! track.

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications appiy to thls European Standard only when incorporated within i t by amendment or revision. For undated references the latest edition of the publication referred to applies.

EN 50121-5 Railway applications - Electromagnetic compatibility Part 5: Emisslon and immunity of fixed power supply installations and apparatus

EN 50122 series Railway applications- Fixed installations

EN 50122-1 Railway applications - Fixed installations Part 1: Protective provisions reiating to electricai safety and earthing

EN 50123 series Railway applications - Fixed installations - DC switchgear

EN 50124 series Railway applications - lnsulation coordination

EN 50124-1 Raiiway applications - insuiation coordination Part 1: Basic requirements - Clearances and creepage distances for al1 electricai and eiectronic equiprnent

EN 50125-1 Railway applications - Environmental conditions for fixed installations Part 1: Equipment on board rolllng stock

Railway applications - Fixed installations - Electric traction - Copper and copper alloy grooved contact wires

EN 50152 series Railway applications - Fixed installations - Particular requirements for a.c. switchgear

EN 50163 Railway applications - Supply voltages of traction systems

EN 60099 series Surge arresters

EN 60168 1994 Tests on indoor and outdoor post insulators of ceramic material or glass for systems with a nominal voltage greater than 1 000 V (IEC 60168:1994)

EN 60383 series lnsulators for overhead lines with a nominal voltage above 1 kV (IEC 60383 series)

EN 60507 Artificial pollution tests on high-voltage Insulators to be used on a.c. systems

EN 60672 series Ceramic and glass insulatlng rnaterials

Insulators for overhead lines with a nominal voltage above 1 kV - Ceramic or glass insulator units for d.c. systerns - Definitions. test rnethods and acceptance criteria

IEC 60050-466 International eledrotechnical vocabuiary - Chapter 466: Overhead lines

IEC 60050-81 1 International electrotechnlcal vocabulary - Chapter 81 1: Electric traction

IEC 61109 Composite insulators for a.c. overhead lines with a nominal voltage greater than 1 000 V - Deflnitions, test rnethods and acceptance criteria.

IEC 61245 Artificial pollution tests on high-voltage lnsulators to be used on d.c. systerns

3 Definitions

For the purposes of this European Standard the following definitions apply:

3.1 Systems

3.1.1 overhead contact line system (OCS) supporting network for supplying electrical energy to eiectromotlve power units

hOTE The sysiem may lncude a'l ovnheE0 vrtring, InclLoing ihe calenanes, Vie gmobni contacl mires and rEtLrn wres. eoM wires. I gh1n.ng protecuon LI rcs, I'ne feeoers and re nforcing iewers molnled on tne suppons. omheao conoLclor mils. foundalons and supporüng stnictures and componenls, temineting. supporüng. registering or insulating the conduclor equipment and switching. delecling or pmtecting equipment.

3.1.2 overhead contact line [IEC 60050-81 1, definition 81 1-33-02] contact llne placed above (or beside) the upper limit of the vehicle gauge and supplying vehicles with electric energy through roof-mounted current collection equiprnent

3.1.3 contact Mne [IEC 60050-81 1, definition 81 1-33-01] conductor system for supplying electnc energy to vehicles through current-collectlng equipment

3.1.4 overhead line [IEC 60050-466, definition 466-01-01] an electric line whose conductors are supported above ground, generally by rneans of insulators and appropriate supports.

NOTE Certain overhead iines may also be constnicted wiih lnsulated conductors

3.1.5 overhead contact line with catenary suspension [IEC 60050-81 1, definition 81 1-33-05] overhead contact line where the grooved contact wire or wires are suspended from one or more longitudinal catenaries

NOTE Longitudinal suspension is an equivalent terrn Io catenary suspension.

3.1.6 load gauge, static maximum cross-sectionai profile of the vehicles using the railway line

3.1.7 kinematic load gauge static load gauge enlarged to ailowfor dynamic movements of the vehicle, e.g. suspension travel and bounce

3.1.8 kinematic envelope kinematic load gauge further enlarged to allow for possible toierances in the position of the track

3.1.9 swept envelope kinematic envelope enlarged to allow for centre and end throw of the vehicles on horizontal and vertical curves

3.1.10 neutral section [IEC 60050-81 1, definition 811-36-161 section of a contact line provided with a sectioning point at each end, to prevent successive electrical sections, differing in voltage or phase, being connected together by the passage of current coilectors

3.1.11 insulated overlap [IEC 60050-81 1, definition 81 1-36-14] sectioning point forrned by overlapping the ends of adjacent sections of contact lines, ailowing parallel ~ n n i n g , insuiation being provided by a suitable air gap between the two sets of equipment

3.2 Conductors

3.2.1 contact wire [IEC 60050-811, definition 811-33 151 electric conductor of an overhead contact line with which the current coilectors make contact

3.2.2 catenary [IEC 60050-811, definition 811-33-061 longitudinal wire supporting the grooved contact wlre or wlres either directly or indlrectly

3.2.3 main catenary [IEC 60050-81 1, definition 81 1-33-07] catenary supporting an auxiliary catenary by rneans of droppers

3.2.4 auxiliary catenary [IEC 60050-811, definition 81 1-33-08]

catenary suspended from the main catenary and supporting the grooved contact wire or wires directly by means of droppers

3.2.5 stitch catenary suspension catenary suspension in which the contact wire is suspended by one or more droppers from a short continuos auxiliary wire, aitached to the main catenary at one point on each side of the main catenary support

3.2.6 feeder electrical connection between the contact line and the substation or switching station

3.2.7 line feeder overhead conductor mounted on the same structure as the overhead contact line to supply successive feeding points

3.2.8 reinforcing feeder overhead conductor mounted adjacent to the overhead contact line, and directly connected to it at frequent intervals, in order to increase the effective cross-sectional area

3.2.9 return circuit al1 conductors which form the intended path for the traction return current

NOTE The conduclors rnay be e.g. running mils, relurn conduclor mils. relurn conductor earlh wires. return cables

3.2.10 return conductor [IEC 60050-811, definition 81 1-34-10] any part of the return circuit

3.2.1 1 return conductor rail conductor rail used instead of the running rails for the traction return currents

3.2.12 return cable insulated return conductor forming part of the retum circuit and connecting the rest of the return circuit of the substation

3.2.13 conductor [IEC 60050-466, definition 466-01-151 a metal wire or cable, either solid or stranded, designed to carry electrical energy and forming pari of the overhead contact line system

3.2.14 earth wire [IEC 60050-81 1, definition 81 1-35-1 21 wire connecting supports coilectively to earth or the running rails to protect people and installations in case of insuiation fault and which may also be used as a return conductor

3.3 Electrical

3.3.1 nominal voltage voltage by which an installation or part of an installation is designated

NOTE The voltage of the contact iine may dlffer from Ihe nominal vollage by a quantity Mlhin pemlitted lolerances given in EN 50163.

3.3.2 feeding section eiectricai section of the route fed by individual track feeder circuit breakers within the area supplied by the substation

3.3.3 earth [iEC 60050-826, definition 826-04-011 conductive mass of the earth. whose electric potential at any point is conventionaily taken as equai to zero

3.3.4 fault current maximum current passed through the overhead contact line under fault conditions, within a short defined time period, between live equipment and earth

3.3.5 short circuit accidental or intentionai conductive path between two or more points in a circuit forcing the voltages between these points to be relatively iow. Any such conductive path whether between conductors or between conductor and earth is regarded as a short circuit

3.3.6 short circuit current eiectric current fiowing through the short-circuit

3.3.7 continuous current rating nominal rating capacity of the overhead contact line within the system operating parameters

3.3.8 stray current current which foilows paths other than the return circuit

3.3.9 feeding point point at which the feeding system suppiy is connected to the contact line

3.3.10 isolation disconnection of a section of overhead contact iine from the source of eiectrical energy. either in an emergency or to facilitate maintenance

3.4 Mechanical

3.4.1 span [IEC 60050-81 1, definition 81 1-33-40] the overhead contact line from one support or suspension point to the next

3.4.2 tension length length of overhead contact line between two anchoring points

3.4.3 gradient ratio of the difference in height of the overhead contact line above rail level at iwo successive supports to the length of the span

3.4.4 stagger [IEC 60050-81 1, definition 81 1-33-21] displacement of the contact wire to opposite sides of the track centre at successive supports to avoid localised Wear of the pantograph wearing strips

3.4.5 encumbrance vertical distance from the lower face of the grooved contact wire to the middle of the catenary, measured at the support

NOTE System height is an equivalent teml for encumbrance

3.4.6 contact wire height distance from the top of the rail to the lower face of the contact wire, measured perpendicuiar to the track

3.4.7 minimum contact wire height a minimum value of the contact wire height in the span in order to avoid the arcing between one or more contact wires and the vehicles in al1 conditions

3.4.8 minimum design contact wire height theoretical contact wire height including tolerances, designed to ensure that the minimum contact wire height is aiways achieved

3.4.9 nominal contact wire height [UIC 606-1 leafiet] a nominal value of the contact wire height at a support in the normal conditions

3.4.10 maximum design contact wire height theoretical contact wire height including tolerances and uplift, which the pantograph is required to reach

3.4.11 contact wire uplift vertical upward movement of the grooved contact wire due to the force produced from the pantograph

3.5 support

3.5.1 support structure [IEC 60050-811, definition 811-33-191 parts which support the conductors and the associated insulators of an overhead contact line

3.5.2 mast mainiy vertical structure to provide for support. tensioning and registration of the overhead contact line

3.5.3 cantilever support consisting of one or more transverse members projecting from a rnast

3.5.4 cross-span, span wire wire or cabie, normally electrically insulated, placed across the track and used either to support one or more overhead contact lines (headspan), or to carry iateral registration force (cross-span registration)

3.5.5 foundation construction, usually of concrete or sieel, completely or partly buried in the ground on which the support is mounted. The foundation shail provide stability to ali loads carried by the support

3.6 Component

3.6.1 section insulator [IEC 60050-81 1, definition 81.1-36-15] sectioning point forrned by insulatom inserted in a contlnuous run of a contact line with skids or similar devices to maintain continuous current collection

3.6.2 dropper [IEC 60050-81 1, definition 81 1-33-22 modified] component used to suspend a cross-span registration, an auxiliary catenary or a contact wire from a headspan or a longitudinal catenary

3.6.3 tensioning devlce [IEC 60050-811, definition 81 1-36-45] arrangement enabling the rnechanical tension of the conductors to be adjusted

NOTE Tensioning equipment and tensioner are equivalent lems fortensloning device.

3.6.4 automatic tensioning device device usad in tensioning equipment to automatically maintain constant the mechanical tension in the conductors within certain temperature limits

3.6.5 pull-off form of supporting structure or registration assembly which only fixas the horizontal position (stagger) of the contact and catenary wires, and does not support their vertical load

3.7 Current collection

3.7.1 current collector [IEC 60050-811, definition 81 1-32-01] equipment fitted to the vehicle and intended to collect current from a contact wire or conductor rail

3.7.2 I

pantograph 1

[IEC 60050-81 1, definition 81 1-32-02] ! apparatus for coilecting current from one or more contact wires, formed of a hinged device designed to allow vertical movement of the pantograph head

3.7.3 trolley [IEC 60050-81 1, definition 81 1-32-08] apparatus for collecting current from a contact wire by means of a grooved wheel or contact slipper mounted on a pole which is movable ln any direction

4 Overhead contact line systems

4.1 General

This standard has been constructed in four main clauses (5, 6, 7, 8), detailing the design activities,

4.2 System design

The function of an overhead contact line system is to transmit energy from the fixed installations of an electric railway to the moving traction units. In order to fuifii this function to the required standards of reliability and economy, the major features of the contact line system shall be designed in accordance with the requirements set out in clause 5.

In particular the consideration of the integration of the overhead contact line design with the corresponding features of the other systems upstream and downstrearn of the energy flow. i.e. the power supply system and the traction system (amongst others), is undertaken here. Aiso included is consideration of environmental and operating conditions.

The current collection system is a cornbination of overhead contact line and pantograph sub-systems, and the quality and reliability of the performance of the current collection system depends on the characteristics of both sub-systems. 60th systems shall be designed to appropriately fulfil their tasks. The design shall take care of the compatibiliîy of both systems.

The end product of the overhead contact line system design is termed in this context the overhead contact line system specification and can be thought of as the definition of the architecture of the overhead contact line system. The minimum content of such a specification is defined in clause 5.

4.3 Overhead line equipment and components

The individual cornponents and pieces of equipment which go together to make up the contact line system can fali into a number of categories. These are brought together by a basic design activity. They can be designed from first pnncipies in an engineering sense or can be propnetaiy items whose testing and acceptance as a valid part of the overhead contact line system is undertaken by the basic designer. In ali cases the equipment described in clause 6 is used to accomrnodate al1 the major characteristics of the systern as defined in the output from the previous activity, the contact system specification.

! The requirements stated in clause 6 appiy both to the design of components, equipment and l

assemblies, and the manufacture and supply of such items. i 1 l

4.4 Installation design

Installation design is the activity which is particular to the scheme or project of new electrification !

works. The overhead contact line system, and the basic design of the equipment and components are I applied to the particular requirements of the route to be electrified in accordance with the requirements of clause 7. 1

(

4.5 Construction

The construction of new overhead contact lines as defined in the scope shall be undertaken in accordance with the requirements of clause 8. In particular this clause concentrates on the constwction being in accordance with the design information provided in accordance with clauses 6 and 7, and conditions of acceptance, quality of workmanship etc.

5 System design

5.1 Fundamental design data

This system designer shaii document the fundamental design data and the performance instructions of the client.

5 . 1 Service and operations information

The system designer shall document the train service characteristics and operationai requirements as defined by the client, and shali include:

a) the line speed profile of the route, or the speed and performance capabiiity of the trainltraction units to be employed, or the future performance capability to be anticipated and allowed for i n the design, including any allowances for over speeding;

b) the type and frequency of electrically hauled trains including the number of pantographs per train and minimum spacing.

5.1.2 Electrical power system design

The overhead contact line system design shall be based upon the consideration of the electrical characteristics of the power supply syçtem design:

- nominal voltage and frequency, in accordance with EN 50163;

- short circuit current details;

- required current rating;

- current under fault conditions; - required impedance for AC systems; - required resistance for DC systems;

- proposed feeding system;

- proposed return system;

- dimensioning of insulation; - earthing and stray current protection in accordance with EN 50122-1.

5.1.3 Environmental conditions

The environmental conditions, particularly in terms of normal and worst case conditions, shall be taken as described in annex A.

5.1.7 Additional features

The system designer shail document any additional features requested by the client for the overhead i contact line system design, which may include the foilowing:

a) external limitations on contact wire heights or uplifts, or system heights and clearances;

b) l i fe expectancy and desired maintenancelrenewal philosophy, ailowable grooved contact ! wire Wear (if required) including accessibiiity for electrical sectioning, inspections etc., and including planned preventive or condition monitored maintenance; I

c) specification of EMC limitations.

Attention is drawn to legal requirements, National Standards or interna1 railway regulations

5.2 Requirernents o f the overhead contact line system

5.2.1 Design o f current collection systerns

5.2.1.1 General

The dynamic performance of the overhead contact line system and the pantograph systems shall be analysed in order to anticipate of the dynamic behaviour of the overhead contact line. The dynamic behaviour of the overhead contact line depends upon characteristics such as the mechanical load in each conductor, the conductor masses per unit length, the design at the support, and the pre-sag of the contact wire.

A mechanical study of the overhead contact line systems carned out from the simulation shall obtain the following resuits:

- the uplift of the contact wire at the support; - the criteria of current collection quality.

The criteria for current collection quality shall be defined by the mean contact force and standard deviation or the loss of contact by unit time

The rnean contact force minus 3 standard deviations shall be positive

The percentage ioss of contact shall be less than 1 % where the contact force shall be simulated for a scanning rate of 0,2 m.

On a train with multiple pantographs, the performance of each pantograph shall be assessed

5.2.1.2 Contact forces

Overhead contact line equipment is generally designed to accept maximum and minimum total contact forces between the pantograph and the contact wire while taking into account the aerodynamic effects which occur at the maximum permissible speed of the vehicie. The minimum contact force shall be positive and is used to determine no loss of contact between the pantograph and the overhead contact line. Force values Vary with different combinations of pantograph and overhead contact system and the method empioyed in simulating these values. Typical caiculated values of force between the contact wire and collecter strip are shown in Table 1.

- 16 -

Table 1 -Contact force

5.2.1.3 Uplift

System

AC

AC

DC

DC

It is appropriate to limit the pantograph and contact wire uplift at the support. The uplift at the support, for the maximum span length under normal operating conditions, shail be calculated by the system designer or a simulation programme.

The space for free and unrestricted uplift provided by the design at the support shall be a minimum of twice the calculated or simuiated uplift value. If restrictions or design limitations to uplift are included in the design then a figure not iower than 1,5 shall be used.

Speed

Ikmlh

< 200

>ZOO

2 200

> 200

5.2.1.4 Elasticity and variation

The overhead contact line shall be designed in such a way, that there is a small variation of the elasticity II. The elasticity e is the uplift per force in rnmlN measured at the grooved contact wire. In every span length there is a point of maximum elasticity and a point of minimum elasticity. This is described in the following formula for variation u.

Contact force

NOTE Low elastlcily does not aiways give a small variation. The elasticiiyvaiues are static values.

Maximum

N

300

350

300

400

The elasticity values and their variation depend upon both the configuration of the line and the speed ailowable on the track. For the overhead contact system the following main factors shail be taken into

Minimum

N

Positive

Positive

Positive

Positive

account:

- the number of conductors of the contact lines; - the tension of the conductors;

- the iength of span; - the existence of stitch wires.

5.2.1.5 Wave propagation velocity

Waves caused by pantograph forces on contact wire have a propagation velocity. The operational speed of the line shall be less than 70 % of the wave propagation velocity.

5.2.2 Suspension systems for contact wires

Tensioned contact wires may be suspended from main or auxiliary catenaries, bridles, stitch wires or from direct tramway (non-catenary) type supports. Non-tensioned contact wires may be supported from other forms of continuous support.

Catenary type suspension should be defined for lines where speeds greater than 100 kmlh are necessary.

5.2.3 Tensioning systems

Variations in conductor tensions have the highest singular effect on overhead contact line design for current collection. The tensions shall be maintained within the system design parameters. To ensure satisfactory current collection, except when speeds are low. automatic tensioning for the contact wires is necessary.

For high speeds, both catenary and contact wire shall be automatically tensioned. For very high speeds they shall be separately automatically tensloned.

5.2.4 Grooved contact wires

The grooved contact wires shall conform to the requirements of EN 50149.

5.2.4.1 Pemissible tensile loading

The permissible tensile load of a grooved contact wire depends on the parameters stated in 5.2.4.2 to 5.2.4.7. Ali of these parameters shall be weighted with an individual factor. The minimum tensile stress of the grooved contact wire shall be multiplied by the product of these factors to get the maximum permissible working tensile load.

The calculated grooved contact wire working tensile stress shall not exceed 65 % of the minimum tensile stress of the grooved contact wire.

The data in Table 2 to Table 7 may be interpolated

EXAMPLE:

=129 ~ l m r n ' maximum working tensile strength.

The design working tensile load for a 100 mm2 grooved contact wire is in this case 12,9 kN.

5.2.4.2 Maximum temperature Ktsmp

The tensile strength and creep behaviour of grooved contact wires depends on the maximum working temperature. The factor Kte,, expresses the relationship between the permissible tensile strength and the maximum working temperature of a grooved contact wire and is illustrated in Table 2.

Table 2 - Factor K,.,,for grooved contact wires

Grooved contact wire material

CU-Ag 0.1

Cu-Cd - Cu-Sn

Maximum working temperature

S 70 "C

1 ,O

1 ,O

1 ,O

80 "C

1 ,O

1 ,O

1 ,O

100 "C

0 3 -

0 3

bogdan.mateescu

Highlight

bogdan.mateescu

Highlight

5.2.4.3 Ailowable Wear K ,.,, Provision shali be made for allowable Wear by applying a factor appropriate to the amount of Wear.

5.2.4.4 Wind and ice loads Kload

The effect of wind and ice loads on maximum grooved contact wire tensile strength depends on the design of overhead contact lines. The factor hoad depends on the wind and ice loads and the design of the overhead contact iine according to Table 3.

Table 3 -Factor Kloadforgrooved contact wires

5.2.4.5 Tensioning accuracy and efficiency Kcw

Tensioning accuracy and efficiency is defined by the factor Kefi. For the normal design and installation of tensioning devices, Ken is assumed to be 0,95.

Wind load

1 ,O

0.95

0,8

Design of overhead contact line

Contact and catenary wire - autornatic terrnination

Grooved contact wire automatic terrnination and catenary wire fixed tensioned

Single grooved contact wire - automatic terrnination

Contact and catenary wire fixed tensioned

For tensioning devices with an approved accuracy and efficiency of more than 0,95. KM is taken as 1,OO.

Wind and ice load

0,95

0,90

0.70

5.2.4.6 Termination fittings K,I,,,

The effect of termination fittings is defined by the factor KCl,,, which is assumed to equal 1 ,O0 if the clamping force is equal to or greater than 95 % of the grooved contact wire tensile strength. Otherwise, K,I,,, is equal to the ratio of the clamping force to the tensile strength.

5.2.4.7 Welded or soldered joints Kjolnt

The possible reduction in the strength of welded or soidered joints is defined by a factor which is equal to 0,95. If no joints are adopted, then is taken as equalling 1,OO.

5.2.4.8 Creep

Not withstanding the requirements of the perrnitted tensile load, consideration shall also be given to the properties of the grooved contact wire rnateriai with respect to resistance to creep. To achieve this resistance to creep, a lower permissible tensile stress andlor working temperature should be adopted.

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5.2.5 Stranded wires i

The requirements of 5.2.5.1 to 5.2.5.7 shail normaiiy be applied to stranded catenary wires but need i not be adopted for other stranded wires if the working load does not exceed 40 % of the minimum l

breaking ioad of the wire.

5.2.5.1 Permissible tensile loading

The permissible tensiie loads of stranded wires shall be weighted with an individual factor (see 5.2.5.2 to 5.2.5.7). The minimum specified breaking ioad of the wires shall be multiplied by the product of these individual factors to obtain the maximum permissible working ioad.

The calculated working ioad of the stranded wires shaii not exceed 65 % of the minimum specified breaking load.

The foliowing example of working load is for a 50 mm2 stranded wire having a specified breaking ioad of 25 kN.

F, = F,,, x 065 x Kt,, x K,,, x Kic, x K,, x K,,,,, x KI,, = 25~0,65x1,0x0,9~0,95~1,0~1,0~0,8

= 11,15 kN maximum working load,

5.2.5.2 Maximum temperature Kt.,,

The maximum working temperature (excluding short circuit loading) shaii be taken into account for conductors only. The factor KI,,, expresses the connection between the permissibie working load and the maximum working temperature for a conductor. It depends on the maximum calculated temperature and the wire type as specified in Table 4.

Table 4 - Factor Kt,,,for stranded wires

5.2.5.3 Wind loads Kwind

Wind load is defined by a factor Kwind which depends on the wind speed as defined in Table 5. Generally the span length in overhead contact iine systems is less than 100 m.

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cabluri multifilare

Table 5 - Factor KWin* for stranded wires

5.2.5.4 Ice loads KI..

Design o f termination

Automatic tension

Fixed tension

The effect of ice loads shaii be taken into consideration in determining the maximum working load of the stranded wire. The factor &,.depends on the type of termination as specified in Table 6.

Table 6 - Factor KI,. for stranded wires

Wind speed

(< 100 kmlhr)

1 ,O0

0,95

Wind speed

(> 100 kmlhr)

0.95

0,90

5.2.5.5 Tensioning accuracy and efFiciency Ken

Design o f termination

Automatic termination

Fixed termination

Tensioning accuracy and efficiency shall be considered oniy for autornatically tensioned cabies by the factor K.R. In cases of standard design and installation of tensioning devices Km" may be assurned to be 0,95. In cases of proven accuracy and efficiency of more than 0,95, Ken rnay be taken to equal 1,OO.

Factor

&ce

1 .O0

0,95

5.2.5.6 Termination fittings Ktamp

The effect of termination fittings is defined by the factor Kt.,, which may be assumed to 1,130 if the clamping force is equal or more than 95 % of the wire breaking load. Otherwise K,I,,, shaii be equal to the ratio of the termination load to the breaking load.

5.2.5.7 Additional vertical load KlOBd

The effect of vertical loads attached to catenaries is defined by the factor Kiaad equal to 0,8. Any wires without loads attached may use the factor Koad equai to 1,O.

5.2.6 Solid wires

Solid wires other than grooved contact wires in overhead contact line systems may be loaded up to 40 % o f the minimum breaking load.

5.2.7 Ropes of non-conducting materials

Ropes forrned from non-conducting rnateriais shall be used only up to their caiculated working load. Particular attention shall be given to shearing loads. bending radius, termination arrangement and extension. These requirements apply to ropes which are made from synthetic fibres and have an external synthetic sheath to protect the fibres.

5.2.7.1 Permissible tensile loading

The permissible tensile load of a rope shall be weighted with an individual factor (see 5.2.7.2 to 5.2.7.6). The calculated working load of the rope shall not exceed 45 % of the minimum specified breaking load of the combined fibres.

EXAMPLE:

F w = Famin X or45 X Kwind X K i c e X Kciarnp X &ad X Kradius

F,= maximum working load.

5.2.7.2 Wind loads Kwtnd

Wind load is defined by the factor Kwinddepending on the wind speed:

KMnd = 1 ,O0 for wind speed5100 kmlh

Kwnd = 0,90 for wind speed>lOO kmlh.

5.2.7.3 Ice loads KI.,

The effects of ice loads shall be talcen into consideration

Ki,. = 0,95

5.2.7.4 Termination clamps &,,,,

The effect of termination fiiiings shall be defined by the factor K,.,,

KCl,,, = 1 ,O0 for adjusted fiiiings

K,I,,, = 0,80 for other kinds.

5.2.7.5 Vertical loads Kload

The effect of vertical loading shall be defined using the factor h o a d

Koad = 0,7 when vertical loads aîtached

Ktoad = 1,O without loads aîtached.

5.2.7.6 Minimum bending radius Kradlus

The effect of the radius on the ropes shail be defined by the factor Km,jtus

Table 7 - Factor Kradtusfor ropes of non-conducting materials

Kmdius

1

0 3

0.8

0,7

0.5

Bending radius

Maximum

m

> 1

1

0,s

0 2

Minimum

m

0,5

0.2

0 , l

, < O,?

5.2.8 Contact wire heights

5.2.8.1 General : r c

The contact wire height of a line is measured at the support, at each dropper and at the lowest point of the contact wire. 5

In defining the contact wire height, the minimum swept envelope height of the vehicle is the most im~ortant factor in calculations. c

c

" E

5.2.8.2 Variation in contact wire height

If, due to local conditions, e.g. tunnels, a variation in height is necessasr, this shall be achieved with as small a gradient as possible and it shall not exceed the values given as a function of speed in Table 8.

Changes of gradient shall be kept as small as possible and shall also be within the limits shown in Table 8.

For high speed lines, where speeds are greater than 250 kmlhr, the contact wire height at the supports shail be designed to a constant height over the rail.

Table 8 -Contact wire gradients

5.2.8.3 Minimum contact wire height

Speed up to

(kmlhr)

1 O

30

60

100

120

160

200

250

> 250 -

The minimum height of the contact wire shall always be greater than the swept envelope of the llmiting gauge of the vehicle, also taking into consideration the electrical clearance in air and the minimum working height of the pantograph, to avoid arcing between the grooved contact wire and the vehicles.

5.2.8.4 Minimum design contact wire height

Maximum gradient

(per thousand)

60

40

20

6

4

3,3

2

1

O

The minimum design contact wire height is calculated by adding al1 movements of the contact wire downwards to the minimum height. Consideration shall be given to:

Maximum change

in gradient

(per thousand)

30

20

10

3

2

1,7

1

0,s

O

- the levelling tolerance of the track;

1

occur at the very same moment that a pantograph passes a narrow part of a tunnel. For this i

"dynamic" case, a smailer clearance is justified. i. i <

Table 9 - Electrical clearances

The clearance values given in Table 9 rnay be reduced or increased according to the values of a nurnber of different factors, e.g. absoiute hurnidity, the ambient temperature range, air pressure. relative air densiîy, the shape and type of materiai for both energised and earthed structures (see EN 50125). Each case, however, should be considered individuaily.

Voltage

DC 750 V

DC 1,5 kV

DC 3.0 kV

AC 15 kV

AC 25 kV .

5.2.11 Clearances between adjacent live AC contact lines of differing voltage phases

For an overhead contact line system there are different electricai sections where the voltagecan reach an higher value than the nominal voltage.

Recommended clearances

For 25 kV autotransformer systems. there is a phase difference of 180" between al1 parts comrnon with the feeder wire and al1 parts comrnon with the overhead contact line.

Static

mm

1 O0

1 O0

150

150

270

For conventional AC systerns, the phase difference between 120" and 180" results in a sirnilar effect at neutral section locations.

Dynamic

mm

50

50

50

1 O0

150

Table 10 provides recommendations for the air clearance which shouid be achieved between iive parts of an AC contact line systern of differing phases.

Table 10 - Phase voltage clearance

5.2.12 Geometrical relationship between grooved contact wire and pantograph

.

Nominal voltage

kV

25

25

Under defined environmental conditions and mechanical tolerances, the horizontal rnovernent of the contact wire and the pantograph shail be such that the grooved contact wire can never slide off the pantograph head.

Phase difference degrees

120"

180"

Relative voltage

kV

43,3

50

Recommended clearance

Static

mm

400

540

Dynamic

mm

230

300

Under operationai conditions, the contact wire shaii be contained within the working pantograph width taking into account:

- the offset of the pantograph from the vehicle; - the movement of the vehicle and the track tolerances; - the limits of movement of the contact wire.

The pantograph working width is the pantograph head width minus a minimum of 2 x 200 mm.

5.2.13 Acoustic noise

Attention is drawn to national regulations for the acoustic noise emission of overhead contact line systems.

5.2.14 Aesthetic appearance

The aesthetic appearance should be considered without inhibiting system safety requirements and while minimising additional maintenance costs. Speciai appearance requirements may be imposed in areas of high sensitivity e.g. historic buildings or areas of special scientific interest.

5.2.15 Electromagnetic compatibility (EMC)

Electromagnetic interference (EMI) caused by railway eiectric traction overhead contact iines can have a number of sources including:

- flashovers and creepage across insuiators; - articulation of i ive parts (droppers, registrations etc.);

- conductors acting as antennae; - arcing and sparking between pantograph and contact wire.

Consideration shaii be given to these aspects in the design of the overhead contact line system and the specification of its components and equipment. Testing and measurement techniques, recommendations for limiting values and suggestions for methods to be adopted to reduce EMI are found in EN 50121-5.

5.3 Presentation of the design

5.3.1 Contact system specification

The design characteristics of the overhead contact line system as presented to the client shall include detaiis of the following:

- the number, size and type of main conductors and their make-up and materiai specification;

- type of contact wire support and catenary suspension (where applicable) and construction detaiis;

- main conductor nominal tensions, the tensioning arrangement and acceptable tolerance on the regulation of the tension (i.e. the maximum allowable total of tensioning efficiency, support and registration efficiency and drag);

- normal and maximum span lengths, stagger limitations, maximum deviation and contributory information (e.g. maximum structure deflection etc.);

- a pantograph clearance gauge; - normal, maximum and minimum grooved contact wire heights; - contact wire profiles including sag and pre-sag of grooved contact wire and maximum

and normal gradients;

- tensioning length limitations and fixed point detaiis; - system height (encumbrance), dropper type, number per span, spacing;

definition of the major characteristics of the different types of support and registrations required, inciuding maximum contact wire uplift, maximum registration arm mass, heel setting, temperature movement to be allowed for etc.;

- installation and maintenance toierances to be applied;

- special requirements to apply at overlaps, crossovers, bridges and tunnels, ievei crossings or any other locations requiring special consideration;

- definition of current collection performance requirements;

- operation and maintenance documentation

5.3.2 Presentation and drawing standards

The text, drawings and other relevant information for system design shall be cleariy identified in the system design specification. The system design specification shall contain at least the information given in 5.3.1.

The contact system specification shaii be part of the total documentation presented to the client on compietion of the work.

5.4 Demonstration of conformiîy

It shall be demonstrated that the overhead contact line system conforms to the requirements of this standard by full-scale iine tests or computer simulation.

5.4.1 Line tests

Full-scale line tests form the most adequate means of demonstrating that an overhead contact line conforms to this standard for a given running speed, using either contact force or loss of contact measurements. Full-scale line tests shall be carried out on installed equipment using instrumented vehicleslpantographs. The instrumentation shall have a minimal effect on pantograph performance.

The results of such tests shall be interpreted in the light of actuai environmental conditions and instaliationlmaintenance tolerances applying at the time of the tests and on consideration of the worst conditions for which the overhead contact system was designed.

If the technology for measurement by force is not availabie, the criterion for measurement shall be the percentage loss of contact which shall equal less than 1 %.

5.4.2 Computer simulation

Computer simulations are suitable for the demonstration of the anticipated current collection performance, especially in comparison with existing lines or with other designs. The computer simulation programme shall be validated against physical testing results.

6 Overhead contact l ine equipment a n d components

6.1 General

Overhead contact line components and component assembiies shall be developed from the system performance requirements defined in clause 5. They shall incorporate any special client requests or preferences defined in the client specification.

The design life of the overhead contact line equipment and components shail beat least equal to the overall life of the overhead contact line system as specified in the contact system specification.

l !

i EN 501 19:2001 - 2 8 - I

l i l

The system designer shall ensure that the requirements given in 6.2 to 6.14, which deveiop the i

contact system specification to component level, are conformed to. These include: i - maintenance instructions deflning inspection, repair and replacement periodicity; - component identification for traceability purposes.

6.2 Insulators

6.2.1 System requirements c c

EN 50124-1 specifies values for the rated insulation voltage of the overhead contact line system E values including:

- the wet power frequency withstand voltage; - the dry lightning impulse withstand voltage; - the nominal creepage length under defined conditions.

The level of insulation for neutral sections or insulators in similar electrical positions shall ensure flashover is avoided at the relative phase voltage.

6.2.2 Client preferences

The design engineer shall document any special client preferences for the design, for example, to combat vandalism. in order to compiy with local procurement policies, working practices or to ensure compatibility with existing systems.

Preferred insulation materials are in general cerarnics, glass or composites (see EN 60672 and IEC 61 109).

6.2.3 Corrosion and erosion

In addition to the electrical and rnechanical performance requirements, the design shall addreçs the suitability of the insuiator surface in catering for:

- cleaning by natural or manual methods; - damage from iocalised atmospheric pollution; - damage from low voltage erosion; - surface or surface interface damage from electro-chernicai activity or water absorption.

The end fittings shall be suitably protected from corrosion and compatible with interface connections. Particuiar attention shall be given to the protection of the interface fixings against moisture entry, chemical activity or fixing degradation under temperature variation or unidirectional current flow.

6.2.4 Pollution

EN 50124-1 shall be adopted for the creepage distances necessary for the pollution levels defined in the system design. The shape and size of the insulator shall be defined by its mechanical and electrical performance, its ability to shed water or pollutants from the surface and compatibility with existing interfaces.

6.2.5 Factors of safety

The minimum tensile strength of the insulator shail be at least 95 % of the specified tensile strength of the conductor systems in which it is used. The maximum working tensile load on the insulator shall not exceed 40 % of the minimum tensile strength of the insulator.

i The maximum working bending load shall not exceed 40 % of the minimum bending load of the i

insuiator. The maximum working bending load may additionally be limited by any deflection criteria I defined in the system design. i

1

For insulators which resist or withstand torsional loading, the permissible torsional stress shall be defined in the design and tested together with any other applied loads.

!

lnsulators and end fittings shall be designed to resist any relative torsional movement under design loads.

Where new technologies are empioyed or there is reiatively little operational experience of the proposed design. the factors of safety given in paragraphs 1 to 3 of 6.2.5. above may need to be increased until adequate data and experience are available.

The design of end fittings shall otherwise comply with the requirements for termination components given in 6.1 1.

6.2.6 Testing

Ali tests shall be undertaken in accordance with current recognised international standards (EN 50124, EN 60168, EN 60383, EN 60507, iEC 61245 and EN 61325).

The system designer shall agree specialised tests not included in international standards with the client and manufacturer as appropriate.

6.2.7 Electncal parameters

Ali electrical parameters shail be proven with type tests.

6.2.8 Mechanical pararneters

Ali mechanical parameters shali be proven with type tests.

6.2.9 Inspection

lnsulators shall be suppiied under a recognised quality control procedure and shall be subject to auditing for quality control and inspection of the final component prior to shipment.

6.2.10 Component identification

Each insuiator shall be legibly and indeiibly marked to provide identification of the manufacturer and production details for traceability.

6.2.11 Maintenance instructions

The system designer shall specify any periodic and specialized maintenance requirements for the insulator.

6.3 Grooved contact wire

The grooved contact wire shall conform to the requirements of EN 50149.

6.4 Other wires

6.4.1 Systern requirernents

Wires and conductors used in the eiectrification system design shali be capable of carrying iine current and subject to time limitation, fault current. 00th levels of current shali not have a detrirnental effect on the mechanical performance of the wire.

insuiated cover may be required, suitable to provide mechanical protection against damage or I

electrical insulation suitable for its application in the overhead contact lines. I


The system designer shall document any client requirements which rnay inciude special preferences for the design for conformance to local procurement policies or national standards (Le. working with cadmium coppers) or compatibility with existing systems.


Surface protection against local and environrnental pollution shali be provided on wires or conductors of ferrous materiai. Additionai provision shali be considered for internai strands of ferrous or non- ferrous multi stranded wires (Le. greasing).

6.4.4 Working loads

Working loads shall be in accordance with the requirements of 5.2.6. Wires or conductors which are subject to fatigue, restrictions on creep or iocalised stressing shail have increased factors of safety.

6.4.5 Testing

Wires or conductors shali comply with appropriate European, international or national standards for rnechanicai and electrical parameters, inspection and quailty control requirements.

6.4.6 Cornponent identification

Component identification shali be provided on wires which have visual or dirnensional similarity but may substantialiy differ in performance characteristics. This is particularly relevant with wires incorporating different materials.

6.5 Droppers

6.5.1 Systern requirernents

The performance parameters for the design of droppers shail be defined in the systems design, in terrns of its mechanical and electrical requirements.


Surface protection against local environmentai pollution shail be provided on wires or conductors of ferrous material. Additional provision shall be considered for interna1 strands of ferrous or non-ferrous rnulti stranded wires.

6.5.3 Working loads

Working loads shali be in accordance with 5.2.5. The system designer shail increase factors of safety for wires or conductors which are subject to fatigue or iocaiised stressing.

6.5.4 Testing

Type test certification of the design shali be available to establish the actual periormance parameters ! of the design.

6.5.5 Electrical parameters ! I

Droppers may be defined as either current carrying, non-current carrying or insuiating.

Current carrying droppers shail be designed to allow for the electrical current loading defined in 5.1.2. I

I Eiectricai design shali be in accordance with 5.2.9, taking into account the current distribution between the droppers in at least one span.

For non-current carrying droppes, measures shali be undertaken to restrict current flow.

NOTE For certain design sptems, non-current camying droppers may besubject io llrnited current Row.

lnsulation in droppers shali be considered individualiy.

6.5.6 Mechanical parameters

Droppers shall be defined as either rigid, flexible or sliding. The different types shali w'thstand service loads plus additional ioads durinn construction. Loads imposed by staff standing on or attaching to the contact wire shail not be consid&ed

6.6 Supporting assemblies

6.6.1 Performance requirements

Supporting assernblies shall be designed to:

- accommodate the conductors, the associated insulators and other equipment as defined in the system design output;

- accommodate, without prejudice to the performance criteria. the expansion and contraction of the conductors as deduced from the conductor materials, tension length iimits and worst case environmental conditions or as defined in the system design specification;

- comply with the requirements for support and registration efficiency and drag as stated in the system design specification ;

allow for adjustment of the catenary height, contact wire height and the stagger to be made after erection as required by the client;

- always be clear of the kinematic and swept envelope gauge of the vehicle and the pantograph clearance gauge by a value that is specified by system design.

6.6.2 Design loading parameters

The loads which shall be considered as acting on the supports of overhead contact lines are derived from the following:

the weight of the support , the equipment and insulators fitted to the support, inciuding as appropriate any additional ioads applied during installation;

- the loads transmitted to the support by the conductors connected to it, or supported by it, inciuding those derived from wind pressures and ice acting on the conductors;

- the loads derived from wind pressure and ice acting on the support.

The worst case load conditions to be expected during erection or in service operation shall be taken as the basis for the seiection of the components. Where relevant, the loads denved from dynamic pantograph interactions shall be considered.

In dimensioning the support arrangement, the permissible materiai stresses shall be considered, particularly with respect to buckling. Any limitations on deflection shall be defined from the system design output so that there are no limitations ln the use under service conditions.

Evidence shall be provided by calculation andfor type tests.

Mechanical designs shall provide a path for fault current in the event of insulation breakdown. without causing failure of the support arrangement.

6.7 Clamps, splices and other in-line tension fittings

6.7.1 System requirements

Castings, fabrications and srnall part steelwork used either within line tension arrangements or supporting assemblies of the overhead line system shall conform to the requirements defined in the system design. The individual cornponents and pieces of equipment shall also conform to the requirements of 5.3.1 in respect of:

- rated current;

- mechanical loading;

- electrical or electro-chernical corrosion.


Clamps, splices and other in-line fittings shall not present any bimetallic contact problems with the conductors to which they apply. Components shall be designed to minimise stress corrosion cracking or EMI.

6.7.3 Working loads

Anchoring clamps or wire connectors shall be capable of securlng cables and wires with a minimum of 2,5 times the working load or with 85 % of the specified tensile strength of the conductors. The lower value shall be attained in any case. The clamps or connectors used shall not incur residuai deformations which impair operation at 1,33 times the working load.

6.7.4 Testing

Type test certification shall be provided for al1 designs which will be subjected to mechanical in line tensions.

6.7.5 Electrical parameters

The components shall have the facility to carry fault current where alternative electrical paths are not available, without failing mechanically. Components shall be deslgned to minimise ionisation and EMI emissions.


No siippage shall occur at the conditions stated in 6.7.3 under the maximum environmental conditions given in the contact system specificatlon.


The design engineer shall ensure that only components with traceable production details. such as the manufacturer and the manufacturer reference shaii be used.

6.8 Electrical connections !


Electrical connections shail have the relevant characteristics as detaiied in 6.7 and in addition: 8

! - shali be able to sustain thermal load cycling;

- the temperature rise with the specified fault current shali not cause fusion or deformation;

- any temperature at the electrical connection shali not exceed the maximum ailowable temperature of the conductor.

6.8.2 Testing

Type test certification shall be provided for ali designs providing electrical connections.


The components shail have the faciiity to carry current increasing the locaiised temperature at the connection to such a degree that it shall not cause fusion, deformation or damage to the mechanical capacity of the conductors. Components shail be designed to minimise ionisation and EMI emissions.


Identification shall be used to recognise application parameters, manufacturer and manufacturer reference and traceability of production detaiis.

6.9 Sectioning devices


The term "sectioning device" refers to section insuiators or neutral sections, and this clause refers to those discrete devices perforrning this function.

There can be two generic types of sectioning devices, those which aliow a continuous current collection across the device and those which provide a break in the current collection.

The types of insulation used in sectioning devices are either an air gap or solid insuiation.

6.9.2 Mechanical requirements

The sectioning device shaii be designed such that no permanent or temporary deformation shali appear at 1,33 times the working tensiie load. When traversed by a pantograph at the operational speed defined in the contact system specification, the sectioning device shall not raise the dynamic pantograph force to more than 350 N andlor cause damage to the pantograph collecter strip. Special attention shall be paid to the physicai interface dimensions of the specified pantographs.

6.9.3 Electrical requirements

The insulation in the sectioning device shall conform when tested to the eiectncai requirements in 6.2. If the pantograph runs on the insulation, the possible carbon or metai deposition from the pantograph shali be taken into account.

A short circuit caused by a pantograph running into an earthed section shall not damage the sectioning device ln a way which could affect its mechanical integrity.

6.9.4 Maintenance instructions

Detailed guidelines for installation, adjustment and maintenance shall be included in the presentation of the design details.

6.10 Switches and protection devices


Switches and protection devices such as disconnectors, surge arrestors and spark gaps shall be designed for the rated current of the system and voltage where relevant and be capable of breaking the rated current where specified as load breaking switches. Designs requirements shall be in accordance with EN 50123, EN 50124, EN 50122, EN 50152 and EN 60099.

6.11 Tensioning devices


The tensloning device shall maintain the mechanical tension defined in the contact system speciflcation in the overhead line conductor(s):

- at the required reference temperature for a fixed terrninated conductor; - in the required ternperature range for an autornatically tensioned conductor system.

The device shall be deslgned to achieve an efficiency defined in the systern design specification over the full specified design temperature range of the equipment.


The system designer shall document any additional client preferences for the design in order to:

- combat vandalisrn;

- rninimize visual appearance; - be compatible with existing systerns; - reduce the risk of personnel injury in the event of a systern failure.


Particular attention shall be given to the corrosion protection of any bearing arrangements and suitable maintenance instruction made avaiiable to ensure the design efficiency of the tensioning arrangement.

6.12 Registration assemblies

Registration assemblies shall be designed such that:

- the contact wire and catenary wire are maintained at the registration point within the defined tolerance of the grooved contact wire stagger about the track centre line;

- the longitudinal movernent of the contact wire and catenary wire caused by temperature variation are accomrnodated;

- the worst case uplift of the grooved contact wire can be accornmodated without causing mechanical fouling of the pantograph and any other part of the registration assernbly after ailowing for maximum Wear and tolerance variation of the pantograph;

- the rnass of the moving parts of the registration assembiy, inciuding the connections to the contact wire and registration tube or supporting assembly, shali be kept to a minimum to achieve good current collection.

6.13 Fixed anchor restraints


Fixed anchor points or restraints shall be used in full tension lengths of autornaticaily tensioned overhead contact line equipment to ensure the conductors do not rnigrate towards one end of the tension length with changes in the loading conditions. This may be provided for by the installation of an anchoring arrangement at approximateiy the mid point of the tension iength or at such a location which balances the along track forces at the mid point.

6.14 Structures


Structures are exposed to wind forces throughout their whole iife and generaily ioaded with a higher ratio of wind load than permanent load. A high risk factor shali be used for wind ioading on masts and structures due to the serious risk to operationai avaiiabiiity in the event of structurai faiiure. The calculation for stability shall be supplemented by a calculation of deflection of the support so that under the action of non-permanent ioads, e.g. those derived from wind pressure. horizontal dispiacements of the overhead contact line incompatible with good current collection shali not occur.


The system designer shall document any additional client preferences for design, use of rnaterials, compliance with local procurement poiicies, working practices and compatibility with existing systems. The aesthetic and visuai impact of the structure may be an overriding requirement of the design.


Particular attention shali be given to the provision of a high levei of protection against atmospheric pollution and contamination to rnaintain the design life without frequent maintenance cycles.


Masts and structures shall be designed in accordance with National or International standards and shall take into account the loads and load cases referred to below:

6.14.4.1 Vertical loads

Vertical ioads shali be derived from the weight of the rnast andlor structure itself in addition to the weight of the attached equipment i.e. cantilevers, suspension and registration assernbiies, insulators etc. and ali relevant conductors.

6.14.4.2 Tensile loads

Tensile loads appiied to the mast andlor structure shaii be deterrnined from the tensile loads in the attached conductors.

6.14.4.3 Wind loads

Wind loads on the masts andlor structures shall be derived frorn the wind forces acting on the masts, structures, their attached equipment, wires and conductors connected to the mast or structures and supported by them.

These wind loads established using "design" wind speeds should be multiplied by a load factor acknowledging the higher proportion of wind load to permanent ioad appiied to the mast and structure.

Wind pressure is assumed to act at nght angles to the surface affected. Wind ioading on conductors shall be determined at the height of the suspensionltermination point.

6.14.4.4 Loads from environmental effects

Environmental loads shall be derived from the environmental effects referred to in annex A

6.14.4.5 Ternporary or exceptional loads

These loads shall be derived frorn the temporary loads caused by methods of erection, maintenance or cornDonent failure i.e. broken wire.

Unbalanced ioads derived from a single component failure shall not cause the permanent failure of the mast andlor structure.

6.14.4.6 Deflection

In detailing the design of masts and structures the criteria for defiection shall not exceed the allowance contained within the system design parameters for the contact wire deviation due to wind loads.


If specified in the system design the structure shail be required to carry fault current or to provide an earthed connection within the return circuit of the electrical system.

6.15 Foundations

6.15.1 Syçtern requirements

The design of the foundation shall ensure:

- the specified deviation of the grooved contact wire shall not be exceeded by the deflection of the mast andlor the movement of the foundation;

- the range of ground conditions and profiles to be encountered on the infrastructure is satisfied;

- provision of earthing andlor protection of DC stray currents; - clearance for on-track maintenance plant.

6.15.2 Factors o f safety

The overturning moment shall not exceed 85 % of the stability moment. Calculation of the stability moment shall take the following into account:

- the vertical effect transmitted by the support (including the actual weight of the support); - the weight of the foundations; - the weight and pressure of the ground bearing on the foundatlons.

In the case of calculations for supporting structures embedded or on the faces of rock or masonry, the bond between the support and the rock or rnasonry shall be able to withstand an effort not less than 1,5 times the load applied to the structure.

6.16 Presentation and drawing standards

For each component or component assembly the system designer shail supply as appropriate:

- outiine drawings for identification and purchase reference; - a mechanical type test report; - an electrical type test report;

- a maximum design ioad;

- electrical parameters; - a description of the function;

- installation requirements;

- design maintenance requirements.

i f the component or component assembiy is part of a complete system to be suppiied, system tests shali replace the component tests.

7 Installation design

7.1 General

This clause deals with the allocation of the information from clauses 5 and 6 to its particular application for the geographical route and the provision of instaliation documentation. This shali enable total materiais for instaliation to be identified and assembled and sufficient documentation provided which should allow the amount of construction work necessary to be estimated, planned, instalied and accepted and also provide a basis for "As buiit" records.

The installation design shali conform to the requirements and parameters defined in the contact system specification.

The designer shali employ experienced and proven methods or procedures in the allocation of the overhead iine system to the geographical locations of the route in question and to achieve the requirements of the contact system specification in an optimum economic and architecturaily acceotabie installation.

7.2 Route details

Route details together with the resuits from system and component design shail be the main input to the instaliation design process.

All relevant route detaiis shall be suppiied in advance of the instaliation design process or a comprehensive survey of the route shali be undertaken.

7.3 Sectioning

7.3.1 General

When the precise extent of the eiectrification is identified, the electrical sectioning shali be one of the first installation design activities to be undertaken. The designer shali agree the sectioning of the eiectrification project with the client and in close CO-ordination with the traffic controi and maintenance departments of the raiiway operator.

i 7.3.2 Feeding sections i

The eiectricai energy for the overhead contact line system is supplied from one or more sub-stations. ! 1

The entire overhead contact line system is electrically divided into separate feeding sections. each 1

suppiied from one or more substations. 5

The whole feeding section containing a fault shall be capable of being automaticaliy switched off by the circuit breakers in the event of a short circuit in the overhead contact line.

< I

7.3.3 Subdivisions I

I

Each feeding section shail be divided into a number of eiectrically-connected subdivisions. Each subdivision shail be capable of being isoiated from each subdivision, for example for fault isolation or maintenance work.

7.3.4 Means of sectioning

The sectioning of the overhead contact line system shall be perforrned using sectioning devices (see 6.9) or by means of insulated overlaps.

For high speeds, discrete devices shall be avoided.

7.3.5 Neutral sections

i f two adjacent feeding sections are at different nominal voltages or phases. the two feeding sections shail be separated by means of a neutral section(s). Some types of neutral sections are passed with the pantographs down, others are passed with the pantographs traversing on them. but during the passing operation, current shali not be drawn through the neutrai section.

When the neutral section is traversed by multiple electricaliy connected pantographs. the design shall take into account the distances between pantographs.

Neutral sections shall be piaced away from steep track gradients and areas where the trains normaily stop or draw heavy current, for example, near station areas or signais.

On multiple tracks, neutrai sections should be positioned in close proximity to the feeding point to avoid creating longitudinal feeders.

7.4 Layout

The layout records the position of overhead line supporting structures and wires in accordance with the system design and relative to track and associated infrastructure.

The preliminary layout of structure locations and wires shail be checked by site survey to establish their relationships and the practical ability to install the equipment at the prescribed locations and alignments.

7.5 Presentation

The installation design presentation shali, in conjunction with the system design, fuifii al1 relevant needs for procurement, construction without the need for recourse to the installation designer.

The documentation shail provide a basis for "As built" records and shall be updated through the systems entlre lifetime for maintenance records. The number of drawlngs shall be adequate but minimized.

The presentation shall include at least the following:

- sectioning diagrams;

- layout plans;

- cross-sections, i f required;

- data sheets;

- material summary;

- bonding layout; - guidelines for installation as required.

7.6 Deviation from system and component design

Any changes to the design due to local or installation conditions shall be fully documented and agreed by the system designer with the client.

8 Construction

Electrification construction 1s generally part of an overall railway modernisation project and the strategy for the site management of the various contracts is outlined by the client in the procurement tender for the electrification works.

The client should be satisfied that only competent companies having appropriate experience of overhead contact line design are appointed as constniction contractors. Sufficient resources. including time need to be allocated to enable the contract to be carried out safeiy and to ensure interfaces are satisfactorily managed. Where appropriate, professional help may be sought to enable duties and regulations to be met and compliance with design standards achieved.

The technical actlvities of the construction phase shall be based on the design information provided in clauses 5, 6 and 7. Any deviations from this design information shall be documented and agreed by the system designer and the client. The physical works include the construction. acceptance parameters, commlssioning and handover of the overhead contact line equipment.

This clause ensures the major interfaces and safe working methodologies are addressed and the design requirements satisfactorily implemented and validated.

8.1 Client interfaces

8.1.1 Construction equipment

Relevant and avaiiable construction equipment including motive power which may be avaiiable from the client shali be identified in the procurement tender.

The design engineer shall liaise with the client regarding the design. availabiiity and operation of any construction equipment required or proposes to introduce to the project (excluding small tools).

8.1.2 On-tracWstreet access

The design engineer shall document information provided by the client regarding:

road and rail track access locations for use by contractors and equipment;

operational constraints and requirements governing track access and period of times when such access and possession is permitted;

- environmentai poiicies relevant to the construction phase of the contract; - details of interfaces with existing electrified iines and information regarding operationai

constraints and requirements of isolation.

The design engineer shall be responsible for the day to day liaison with utility owners and local authorities affected by the construction activity.

8.2 Principal methodologies

The design engineer, in support of the construction activities, shall identify the principal methodologies to be employed in the construction of the overhead contact line system in accordance with safety polices. The principal methodologies shall be presented as a quality plan which would cover the various stages of construction such as:

setting out;

- foundation installation;

- steel erection;

- erection of wiring supports;

- running of wire; - registration of the overhead contact line;

- acceptance inspections;

- commissioning.

The methodology statements shall assure the client that safe working practices are foilowed in the execution of the work and are cornpliant with the design limitations. The methodology shall identify the facilities needed to achieve the stated objectives in terms of track possessions, safety protection and any other faciiities which are needed to support the installation. The design engineer shall also identify aspects which are iikely to affect activities carried out by other organisation who have access to the raiiway.

For non-typical situations of deviations from the generai design, specific methodology staternents shall be produced when appropriate.

8.3 Redundant material disposal

The system designer shali document any client instructions for the disposal of redundant material generated during the construction activity. For matenals having negligible capital value such as spoil and excess concrete. accessible areas either on or local to the site for disposal shall be identified. For materials which present opportunities for commercial gain resulting from disposai, e.g. scrap rnetai. the ciient instructions should also be documented and adhered to.

8.4 Recommended material suppliers

The design engineer shall detemine the suppliers of overhead line equipment and components. Particular attention shali be given to equipment and cornponents relevant to overhead contact iines and more generally to power transmission installations. The suppliers may be restricted to those approved by the operator or owner of the raiiway. The client may aiso have identified al1 approved suppiiers at the tender stage.

Examples of such eiements of the overhead contact line shall include, but not be limited to the foilowing:

- conductors;

- insulators; - section insulators and neutral section assernblies;

- eiectrical connections;

- switches and protection devices; - booster transformers and auto transformers.

8.5 Acceptance parameters

Prior to electrical commissioning of the overhead contact line system, a number of acceptance checks shaii be periormed to ensure that the commissioning tests carried out on the overhead contact line system are representative of the final installation. Prior to acceptance tests the construction activity shail provide information which supports the checks performed during acceptance.

8.5.1 Dimensional validation

The overhead contact line construction shail be checked for conformance with the dimensions included in the installation design. Ali relevant records shail be compiied and made avaiiabie for scrutiny by the design engineer.

Acceptance of the overhead contact line shaii provide assurance that the requirements of the overhead contact iine system in the design are reflected in the final installation. Such requirements shail include the foilowing:

- measured mechanical clearances conforming with the specified design; - height and stagger records indicating conformance with the design requirements and

installation tolerances defined by the basic design documentation;

installed electrical clearances conforming with the specified requirements of the design after accountlng for wire movement due to temperature, tension, loading and geometricai variations;

balance weights installed to provide the specified levels of unrestricted movement. both upward and downward, consistent with the temperature of the wire at the time o f acceptance;

- along track movementloffsets of the conductors, support and registration arrangements are correct with respect to the equipment temperature at the time of acceptance;

- measured tensions of fixed termination equipment are within specified toierances after accountlng for the environmental conditions in place at the time of inspection;

- overhead contact line switches operating correctly with regard to blade aiignment, remote and iocaiized motorized operation and manuai operation;

- switch operating gear correctiy installed with regard to switch number identification, switch status identification and security in terms of padlocks. cabinet locks (motorized units) and interlocking requirements.

The system designer shail include as part of the contract deiiverabies a document which specificaily addresses the overhead contact iine acceptance requirements.

8.5.2 "As built" documentation

The design engineer shall provide as built documentation which reflects the material and dimensional content of the overhead contact line installation handed over to the client afier formai acceptance of that installation. This information is normally represented by revised installation design documentation which records the final installation.

8.6 Energization notice

Prior to commissioning of the overhead contact iine, the equipment shail be energised at full operating voltage. The public, staff , organisations working onlor in the vicinity of the overhead contact line and any other concerned parties shail be informed of this by energization notice prior to

the earliest date when energization is anticipated to ensure safety standards and training arrangements are put in place.

8.7 Commissioning

8.7.1 Electrical integrity

The electrical integrity of the overhead contact line system shall be established once al1 acceptance requirements have been satisfied. The commissioning tests shall ensure ali configurations with regard to electrical sectioning are in accordance with the design requirements.

8.7.2 Dynamic validation

Dynamic validation shall be undertaken to ensure compliance with the performance criteria (see 5.2.1) of al1 relevant parts of the project including trackwork. rolling stock and catenary interfaces.

If the technology for measuring by force is not available, then the criteria for measurement shail be the loss of contact. Measurable arcs iasting longer than 10 ms (rnax. 25 ms) shall not occur more than once per 100 m.

A method and equipment shall be selected which records and determines compliance with the prescribed operating conditions.

8.8 Operation and maintenance documentation

The system designer shall provide al1 updated documentation to the client.

Additionally, prior to the formal handover, the system designer shall provide to the client maintenance manuals for the installed overhead contact line system. The maintenance rnanuals shall include procedures for the various aspects with the relevant periodicity's recommended.

These shall include details of the foliowing:

- track patrols;

- routine inspection and maintenance;

- major equipment overhaul; - special tools required for maintenance; - schedule of recomrnended spares, together with sources of supply

8.9 Handover

For the purposes of handover, ali relevant documentation, certification and test documentation shali be transmitted forrnally between the design engineer and client.

Annex A (normative)

Environmental conditions

A.1 E n v i r o n m e n t a l pa ramete rs

In designing the contact lines, the foilowing environmental parameters shall be taken into account. The values to be used for the various parameters shall be specified and may Vary depending on the operational conditions.

A.2 W i n d p r e s s u r e

When caiculating wind pressure, such aspects as prevaliing direction, local conditions, buildings and relevant heights shall be taken into account.

Wind pressure is a variable quantity, which 1s dependent on wind speed and the (shape of the) surface. Prescribedlstandard values for wind spead andlor wind pressure shall be derived from national standards and regulations per country or region. Separate values can be given for conductors and structures.

A.3 P r e c i p i t a t i o n (snow, ice, humid i t y )

Prescribedlstandard values for snowlice shall usually be derived from (national) standards and regulations per country or region.

A .4Amb ien t tempera tu re

The thermal parameters, within which the overhead contact line system shaii function, shali be specified. In the design phase, the average, maximum and minimum ambient temperatures shall be specified.

A.5 S o l a r r a d i a t i o n

Solar radiation shall be taken into account in accordance with annex B.

A.6 P o l l u t i o n

For insulation and corrosion resistance reasons, the degree of pollution shail be agreed according to the information given in Table A.1.

- 4 4 -

Table A.1 -Pollution

A .7Add i t i ona l requ i rements

Pollution level

Light

Medium

Heavy

Very heavy

Additional requirements shall be considered for:

Examples o f typical environments

Non-industriaiised areas with a low density of houses.

Areas with a low density of industries or houses but subject to frequent winds andlor rainfali.

Mountainous areas.

Ali these areas shall be situated at least 10 km to 20 km from the sea (depending on the topography of the coastal area and on the extreme wind conditions) and shaii not be exposed to winds directly from the sea.

Areas with industries which do not producing especiaily polluting smoke andlor with an average density of housing.

Areas with a high density of houses andlor industries but subject to frequent winds andlor ralnfail.

Areas exposed to wind from the sea but not too close to the coast (at least several kiiometres iniand).

Areas with a high density of industries and suburbs of large cities with a high density of heating plants producing pollution.

Areas close to the sea or exposed to relatively strong winds from the sea.

Areas subject to conductive dusts and to industriai smoke which produces particuiarly thick conductive deposits.

Areas very close to the coast and exposed to sea spray or to very strong and polluting wind from the sea.

Desert areas, characterised by no rain for long periods, exposed to strong winds carrying sand and salt, and subject to regular condensation.

- vibration in case of extreme ground conditions; - protection in areas susceptible for lightning;

- EMC;

- stray-current;

- special conditions in tunnels;

- altitude.

Annex B (normative)

Temperature rise in conductors

6.1 Elec t r i ca l d e s i g n of the c o n d u c t o r s y s t e m

The overhead contact line system shall be designed to cater for the electrical current loading (steady and fault) defined by the system design, including return circuits and feeder connections, under al1 environmental operating conditions defined in annex A. The system shall be assessed for short circuit faults.

The maximum temperature rise in the conductors caused by the load currents shall not lead to conductor temperatures at which the mechanical properties of the material are impaired.

The temperatures over which the mechanical properties can be impaired are given in Table 6.1 for different material compositions

Table 6.1 - Maximum acceptable temperatures over which the mechanical properties of the material can be impaired.

When calculating the temperature rise in a conductor the following contributions should be considered:

- the heating caused by the current; - the solar gain, both direct from the Sun and the contribution first reflected by the earth; - the radiant heat gain from the earth; - the radiant heat emltted from the conductor; - the heat transmitted from the conductor by convection.

Material

Normal and high strength with high conductivity

Silver copper alloy

Cadmium copper alloys

Maximum temperature

"C

80

1 O0

80

Bibliography

ENV 1993-1-1

EN 50126

CLClR 009-003

Structural Eumcode 3 - Part 1-1; Steel - General Rules

Transport railway applications: RAMS

Railway applications - Guide to the specification of a guided transport system

Railway applications: Rolling stock pantographs - Characteristics and tests- Part 1: Main line vehicles

Rallway applications - Current collection systems - Requirements for and validation of measurements of the dynamic interaction between pantographs and overhead contact line 2'

EN 50318 Railway applications - Current collection systems - Validation of simulation of the dynamic interaction between pantographs and overhead contact line ')

EN TC256 WG6 Aerodynamics "

EN TC256NVG19 Railway applications - Drawing standards

EN 61325 Insulators for overhead lines with nominal voltages above 1 000 V

IEC 60060-1 1989 High-voltage test techniques

IEC 60071-1 lnsulation CO-ordination - Part I:Definitions, principles and rules

IEC 60129 AC disconnectors, isolators and earthing switches

IEC 60433 Characteristics of string insulator units of the long md type

IEC 60449 1973 Voltage bands for electncal installations of buildings

IEC 60652 1979 Loading tests on overhead line towers

IEC 60721 Classification of environmental conditions

IEC 60815 Guide for selection of insulators in respect of polluted conditions

IEC 60826 Overhead line support loading

UIC 505-1 Kinematlc gauge forpowered units used on international services

UIC 505-4 Effects of the application of kinematic gauges defined in 505 series on the positioning of structures ln relation to the tracks, and the Tracks in relation to each other

UIC 505-5

UIC 600

UIC 606-1

UIC 606-2

UIC 608

UIC 791

UIC 794

-47 -

Basic conditions common to leaflets 505-1 to 505-4

i Electric traction with aerial contact line 1 Consequences of the klnematic gauge defined by UIC leaflets in the 505 series on the design of contact lines

Installation of 25 kV 50 Hz or 60 Hz overhead contact lines I h

Conditions to be complied with for the pantographs of traction units E

used in international service.

Methods for maintaining overhead contact lines

Performance of the overhead contact line and pantograph in the European high speed line network

44577023 en 50119 01 railway applications fixxed installations electric traction overhead contact...

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