CCMS ref: 118049-INF-SPE-EMF-000002 - … · CCMS ref: 118049-INF-SPE-EMF-000002 Issue: 2 Date:...

CCMS ref: 118049-INF-SPE-EMF-000002

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Table of Contents:

DOCUMENT UNDERSTANDING ............................................................................................4 1 OUTPUT AND STAKEHOLDER REQUIREMENTS .........................................................5

1.1 OPERATING REQUIREMENTS...............................................................................5 1.2 PERFORMANCE REQUIREMENTS......................................................................12 1.3 ROUTE CLEARANCE ............................................................................................13 1.4 BRIDGES AND OVERLINE STRUCTURES ..........................................................14 1.5 PANTOGRAPH CONFIGURATION .......................................................................14 1.6 ELECTRIFICATION AND TRACTION POWER .....................................................14 1.7 LEVEL CROSSINGS..............................................................................................15 1.8 SIGNALLING AND ELECTRICAL CONTROL OPERATIONAL REQUIREMENTS16 1.9 SAFETY..................................................................................................................17 1.10 PLANNING CONSENTS AND COMMITMENTS....................................................18 1.11 ACCESS FOR CONSTRUCTION ..........................................................................19 1.12 THIRD PARTY ACCESS........................................................................................19 1.13 INTERFACING PROJECTS ...................................................................................19

2 ASSET GENERAL REQUIREMENTS ............................................................................25 2.1 RENEWAL INFORMATION....................................................................................25 2.2 ENGINEERING DELIVERABLES TO ACHIEVE APPROVAL IN PRINCIPLE.......25 2.3 APPLICATION OF STANDARDS...........................................................................25 2.4 COMPLIANCE WITH THE RAILWAY INTEROPERABILITY REGULATIONS - APPLICATION OF THE TECHNICAL SPECIFICATION FOR INTEROPERABILITY........26 2.5 RELIABILITY, AVAILABILITY & MAINTAINABILITY..............................................28 2.6 CLIMATIC COMPATIBILITY...................................................................................32 2.7 SURVEY AND MAPPING.......................................................................................33 2.8 GROUND INVESTIGATION REQUIREMENTS.....................................................33 2.9 CABLE ROUTES....................................................................................................33 2.10 ELECTROMAGNETIC COMPATIBILITY (EMC) ....................................................36 2.11 ERGONOMICS AND HUMAN FACTORS..............................................................36 2.12 ENVIRONMENTAL DESIGN REQUIREMENTS....................................................37 2.13 SECURITY, TRESPASS AND VANDALISM..........................................................39 2.14 ACCESS/STORAGE ..............................................................................................39 2.15 PUBLIC RIGHTS OF WAY.....................................................................................40 2.16 REDUNDANT ASSETS..........................................................................................40 2.17 PUBLIC UTILITIES.................................................................................................41

3 ASSET HEAD DISCIPLINE SPECIFIC REQUIREMENTS.............................................42 3.1 ELECTRICAL POWER ASSETS............................................................................42 3.2 SIGNALLING ASSETS...........................................................................................61 3.3 TELECOMS ASSETS.............................................................................................63 3.4 TRACK ASSETS ....................................................................................................68 3.5 STRUCTURES ASSETS........................................................................................71 3.6 EARTHWORKS ASSETS.......................................................................................75 3.7 BUILDING ASSETS ...............................................................................................76

4 APPENDIX A – ENGINEERING DELIVERABLES .........................................................80 5 APPENDIX B – GLOSSARY OF ABBREVIATIONS.......................................................81 6 APPENDIX C – OLE/TRACK CLEARANCES.................................................................85


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DOCUMENT UNDERSTANDING

In this PRS there are four styles of text used, each style corresponds to a certain type of information:

Text in a shaded box signifies a FUNCTIONAL REQUIREMENT

Text in a clear box signifies a PROCESS REQUIREMENT

Text that is italic signifies an ASSUMPTION

All other text signifies general INFORMATION

Definitions within this Project Requirements Specification:

‘The Project’ means the Network Rail Infrastructure Projects team developing and implementing the works defined by this PRS.

‘The Route’ means the applicable Network Rail Network Operations Route team acting as Client and Sponsor for the works (i.e. Western and Wales Routes).

‘The System’ means the electrification system being developed and implemented in accordance with this PRS.

In the writing of this specification any reference to a Company Standard is considered a process requirement, that standard may include functional requirements but is not specific in relation to this PRS and is normal practice when delivering design and construction on Network Rail infrastructure.

Note that this PRS extends and supersedes the GRIP 3 (AiP) PRS ref: 118049-INF-SPE-EMF-000002, Issue: 1 Date: 16/11/2012 by adding GRIP 4-8 requirements.


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1 OUTPUT AND STAKEHOLDER REQUIREMENTS

This PRS forms Appendix A of the Sponsors Instruction 118049-INF-INS-MPM-000003 Issue: 01 26th March 2013. Project Wise link: 118049-INF-INS-MPM-000003 1.1 OPERATING REQUIREMENTS The train specification provided is solely for determining the power supply requirements. The specification does not refer to the introduction of new/transferred rolling stock, nor does it relate to any other infrastructure capability for the provision of trains.

1.1.1 Operating Hours

Station and train service operating periods shall be as per existing.

1.1.2 Lines to be Electrified

For lines to be electrified refer to Sponsors Instruction and associated addendum appendix B of the Client Remit for marked up Sectional Appendix extracts. These are also referenced in SLDs 114711/GWML/001/2/3/4 – v. 04

1.1.3 Maintenance / Engineering Hours Any changes to the Rules of the Plan to support the ongoing maintenance of the infrastructure shall be agreed with Maintenance and NDS, as part of the asset management process. 118049 PRS - 2892

Such changes may include those resulting from the re-routing of electric trains during engineering hours (such as empty stock) that would previously have taken a non-electrified diversionary route, or those resulting from the adoption of structures that cannot be accessed without an isolation of the electric traction supply.

1.1.4 Train Service Specification

1.1.4.1 Passenger Capacity

No change to passenger capacity as an output of this project.

1.1.4.2 Station Capacity

No change to station capacity as an output of this project. Where station/footbridges are to be rebuilt for OLE clearance purposes then the NS&D Client shall be referred to for possible increased capacity.

1.1.4.3 Passenger Service frequency

At the completion of this project, along with the GWML Electrification: Newbury, Oxford, Bristol and CrossRail projects, routes will be electrified to allow electric passenger trains to operate at the following peak hour frequency:


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o Swindon to Bristol Parkway via Bristol Temple Meads.

o Bristol Parkway to Cardiff Central

1.1.4.5 Platforming of Trains

No change to existing, unless otherwise stated by the Sponsor.

1.1.4.6 Combining and Splitting

The project will provide OLE infrastructure between:

o Maidenhead to Reading (inclusive);

o Reading to Newbury (inclusive);

o Reading to Didcot Parkway (inclusive);

o Didcot Parkway to Oxford (inclusive);

o Didcot Parkway to Swindon (inclusive);

o Swindon to Bristol Parkway (inclusive);

o Swindon to Bristol Parkway via Bristol Temple Meads (inclusive).

o Bristol Parkway to Cardiff Central (inclusive).

To accommodate any combination and splitting of services required to maintain existing operability. The requirements will be driven from timetable work which will be provided by other projects to the Sponsor.

1.1.4.7 Reverse moves

No change as part of this project. Note that complex reverse moves at triangular junctions, to turn train formations around for operational reasons such as defective cab at one end, may be restricted for single mode electric units due to the limits of electrification.

1.1.4.8 Loco Assist and Change facilities

No change as part of this project.

1.1.4.9 Loop and Recess facilities away from yards

All loops and recess facilities on the core route to be electrified are to be included, unless otherwise stated in the Sponsor’s Instruction. For lines to be electrified refer to Sponsors Instruction (marked up Sectional Appendix extracts).


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1.1.4.10 Turn-Back Facilities

Provision of OLE infrastructure for turn-back facilities shall reflect practical operating considerations and unit turn-round needs for a maximum train length of 260m. 118049 PRS - 374 The extent of OLE indicated on the Lines to be Wired diagrams in the Sponsor’s Instructions, takes account of requirements for unit turn-back facilities.

1.1.4.11 Crossovers

All crossovers on the core route to be electrified are included, unless otherwise stated in the Sponsor’s Instruction.

1.1.4.12 Depots and Stabling

The requirements for Electrification of connections to depots and stabling facilities are covered in the Sponsor’s Instructions and the Lines to be Wired diagrams.

1.1.4.13 Run Off for Misrouting

Run off shall be provided and where known extensions to the lines to be electrified are planned, the run-offs shall provide easily upgradeable final design for the junctions, e.g. Westerleigh Jcn. 118049 PRS - 2894

1.1.5 Freight Services No change.

1.1.6 Journey Times No change.

1.1.7 Timetable Requirements / Planning Assumptions

1.1.7.1 Rules of the Plan

Designs shall target delivery of Capacity Utilisation Indices (CUI) not greater than 75% for all new infrastructures. 118049 PRS - 387 The infrastructure shall be designed so that it is as flexible as possible to support recovery from perturbations, and can be readily maintained to maximise availability without unreasonably constraining usage. 118049 PRS - 388


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1.1.7.2 Headways and Margins

No change as part of this project.

1.1.7.3 Engineering Allowances

No change as part of this project

1.1.7.4 Performance Allowance


1.1.7.5 Station Dwells



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1.2 PERFORMANCE REQUIREMENTS The DRAM for Western Route has commissioned PRAMS system integration work to model the infrastructure (legacy and new), Operations and maintenance changes and their impact to customers. The project shall support PRAMS modelling of the railway system to demonstrate the combination of operations, maintenance and infrastructure will deliver the CP5 and CP6 performance specified by the Route (expressed as PPM) 118049 PRS - 2745

1.2.1 Passenger Performance Measure The overall timetable performance shall be measured against the industry standard Passenger Performance Measure (PPM). 118049 PRS - 400 PPM is defined as the percentage of trains which arrive at the scheduled terminating destination within five or ten minutes of the published time as stated in the GB Passenger Timetable.

1.2.2 Delay Minutes The project shall determine the location of assets critical to train performance and configure these assets appropriate to the reliability and availability requirements. 118049 PRS – 402

Modelling shall be undertaken to permit the allocation of delay minutes to assets in order to provide verification of the design. 118049 PRS – 2754

1.2.3 Asset Reliability, Availability & Maintainability Requirements

1.2.3.1 Reliability

The Electrification of the Great Western Mainline is being undertaken during a time where Asset Management principles have been fully embraced (such as constructing where a ‘whole life cost’ approach adoption is the key to project success). The new system is being developed to maximise reliability, availability and maintainability through not only innovating where appropriate but by also learning the lessons of reliability failures suffered on existing electrified Routes. With these key points in mind it is a fair and achievable requirement to request that as a minimum the new electrification system performs better than the current ‘best in class’ systems available to infrastructure managers. The following functional requirements have been developed in conjunction with the IP W&W System Engineering team and are a product of reviews of national infrastructure performance, future maintenance organisation capability and potential performance of the new systems in development.


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The OLE & Power Supply infrastructure sub-system shall deliver a minimum of: - OLE (Electrical section trips) MTBSAF >4 years per single track km - OLE (Dewirement) MTBSAF >500 years per single track km - Traction Power Supply MTBSAF >15 years per single track km 118049 PRS – 2747

1.2.3.2 Availability

The design and maintenance strategy shall facilitate a Mean Active Repair Time (MART) of 2 hours. 95% of all repairs shall be completed within 6 hours. 118049 PRS – 2749 MART is defined as the mean active repair time required, after the arrival of the repair team, with all the necessary tools, to locate and isolate fault, make the repair and perform a functional check to verify that the item has been restored to operational status.

1.2.3.3 Maintainability The project shall produce an asset management plan which delivers the reliability and availability requirements in steady state and perturbations. This plan shall include but not necessarily be limited to; - Risk based maintenance process - Resource requirements (e.g. human, plant and machinery, tools, competence requirements) - Supply chain management (e.g. strategic spares) - Addressing the requirements for a maintenance plan under the Technical Specifications for Interoperability - Acceptance process 118049 PRS – 2751

The project shall demonstrate the performance of the installed electrification system through an agreed (with the RAM (E&P)) FRACAS validation system. Acceptance requirements – RAMS analysis reports of the operational system with clear identification of and justification for the reliability assumptions made for all assets. 118049 PRS - 2753 1.3 ROUTE CLEARANCE Infrastructure alterations shall provide W9 / W10 / W12 2nd Gen +150mm gauge clearance. The Project shall comply with or seek derogation to the Infrastructure TSI against specific requirements as appropriate. 118049 PRS - 409 The gauge clearance of the existing routes is detailed in the Gauge Capability Database.


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Crossing

Bathampton MLN1 103 17 FP

Bristol T Meads MLN1 118 04 UWC

Bristol T Meads MLN1 118 09 FP

Brinkworth (disused) SWB 87 17 FP

Kingway Barn SWB 93 7 FP Bristol Parkway Barrow Crossing SWB 111 69 WL

Bishton SWM2 153 1 MG

Peterstone Wentloog 1 SWM2 163 19 FP

Marshfield SWM2 164 17 FP

Wentloog E Train Crew SWM2 165 18 WL

Rumney (disused) SWM2 167 65 FP

The GWML Operations Risk Control Co-ordinator shall be consulted to undertake an assessment of each relevant level crossing using ALCRM (All Level Crossing Risk Model). The assessment is to ensure that the sighting for crossing users is not adversely affected by the works at, primarily, non-protected level crossings. The assessment shall be carried out when the OHL design is at an appropriate level of development and at least 3 months in advance of construction activity. 118049 PRS - 824 Vehicles Level crossing signage shall be updated with appropriate standard warning signs showing maximum height of vehicles etc. 118049 PRS - 2897 1.8 SIGNALLING AND ELECTRICAL CONTROL OPERATIONAL REQUIREMENTS

1.8.1 Electrical Control Centre Location The National Electrical Control Centre (NECC) project was instigated to provide 2 ECC’s (Electrical Control Centres) to locate Electrical Control Operators with workstations, cover the Electrified network and provide back up to each other, i.e. each NECC could control the entire Network. These were also originally intended to house the national SCADA servers. However, this has changed and the current NECC proposal will instead provide workstations housed in 8 to 14 Regional Operation Centres (ROC’s) which will be provided with ‘long-line’ telecommunications to connect the ECC workstation equipment to the 2 National Electrical Control Centres, which are likely to retain the National SCADA servers. For the GWML, the ECC’s proposed are at Didcot, within the Thames Valley Signalling Centre, and at Cardiff within the South Wales Signalling Centre. Didcot ROC is proposed to be the final ECC control location from Paddington buffers to the Cardiff ECC boundary location detailed below. Staged handover from Romford ECO is required taking cognisance of control during testing phases of the project. The boundary between Didcot and Cardiff ECC is to be located at the neutral sections at Patchway and Filton Junctions (Up/Down Tunnel lines, Up/Down Bristol Lines respectively) thus protecting the supplies between St Brides and Thingley Junction feeder stations – Cardiff will take control of everything West , Didcot everything East thereof.


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It should be noted that Cardiff ECC will not be commissioned until the Valley Lines are ready to be controlled and Didcot TVSC ECC will therefore temporarily control the main lines through to Cardiff (and subsequently to Swansea) until such time as that commissioning takes place.

1.8.2 National SCADA (BBD020) project will provide: SCADA Screen Design SCADA Screen Design/layout/HMI in line with the requirements of the GWML section diagrams and isolation diagrams and method of AT operation and in line with Alarm/Indication and Controls definitions. Also training on the general BBD020 SCADA system with suitable competence assessment. SCADA workstation SCADA workstations including VDU’s, keyboards, mouse etc Simulator Access to a GWML specific training simulator facility including facilities for a trainee to simulate monitoring and controls and operation of representative parts of the electrification infrastructure with the ‘infrastructure’ providing responses to the trainee as is expected for the real infrastructure, using GWML screen design/layout/HMI. This will probably be based on the ‘test’ area, the first area to be energised. Lead on all SCADA interfaces, design, Safety Case and Configuration Management Lead on interfaces to FTN, ergonomics and end-to-end SCADA system implementation including provision of design rules, transmission details, protocol and RTU requirements to meet BBD020/IEC61850 integration, and configuration management standards. FTN FTN for SCADA data communications SCADA Servers and configuration SCADA Servers and configuration at NECC’s at Three-Bridges and Manchester (consistent with National CMS Strategy)

1.8.3 Route ECC/ROC facilities At TVSC and SWSC the project shall provide: ECC facilities at the ROC (except SCADA workstations and operationally required facilities to be provided by BBD020) with all associated ECC facilities in ROC including desks, chairs, general lighting, fit out, access security, secure equipment room space, meeting/planning area, rest area etc. 118049 PRS - 848

1.9 SAFETY

The project shall be responsible for seeking safety authorisation in accordance with the Common Safety Method for risk evaluation and assessment (Commission Regulation (EC) 352/2009). 118049 PRS – 2898


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The following are not mandatory but should be used. They become mandatory requirements where quoted in this document.

ORR principles and guidance Network Rail Guidance Notes British Standards European Standards (except as noted above) Other: Industry Standards, Instructions, Guidance, and Codes of Practice of

relevance.

A standards baseline shall be established when Approval in Principle stage is completed. Where standards are updated after this baseline then any changes to requirements shall be carried out through the agreed change control process. 118049 PRS - 994

Where standards refer to other updated or superseded standards the current version of the referenced standard shall apply. 118049 PRS - 995

Conflicts between applicable standards shall be reported immediately to the standards owner and Client. 118049 PRS - 996

Proposals that provide a business benefit by developing alternatives to standards should be developed as a non-compliant option where the implications of the deviation to standards are explained. 118049 PRS - 997

Proposed deviations to standards shall be agreed and in place prior to Form A and Form 1 submissions. 118049 PRS - 998

2.4 COMPLIANCE WITH THE RAILWAY INTEROPERABILITY REGULATIONS -

APPLICATION OF THE TECHNICAL SPECIFICATION FOR INTEROPERABILITY

2.4.1 High Speed Routes

The route between London and Cardiff is classified as TENS, High Speed and is further classified as: Category II – specifically upgraded high-speed lines equipped for speeds of the order of 200 km/h. Category III – specifically upgraded high-speed lines or lines specially built for high speed, which have special features as a result of topographical or environmental, relief or town-planning constraints, on which speed must be adapted individually.


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The Ergonomics and human factors team shall be consulted for acceptance of the plan during GRIP stage 3. 118049 PRS - 1187 2.12 ENVIRONMENTAL DESIGN REQUIREMENTS

2.12.1 General The need for sound environmental management and sustainable design shall be an explicit consideration during the design process. 118049 PRS - 1190

2.12.2 Legislation, Regulation and Other Requirements Full account shall be taken at all times of statutory and mandatory requirements, such as those specified by the relevant local planning, highways and environmental health authorities, or the relevant statutory agency as applicable to the design of the Works. 118049 PRS - 1192 Where new buildings, structures or rail infrastructure is to be constructed, account shall be taken of any commitments (agreed or proposed), undertakings or conditions of any planning permissions, Transport and Works Orders or other consenting regime entered into by Network Rail, including any sustainability objectives provided by the Network Rail. 118049 PRS - 1193

2.12.3 Environmental Design Plan An Environmental Design Plan (EDP) shall be prepared. The EDP shall be reviewed and revised as necessary as a result of changes to the Scope of Works. 118049 PRS - 1196 At a minimum the EDP shall define: Compliance with the Network Rail's Environmental Policy Statement The specific legislation, regulation, permissions, consents and planning conditions and

commitments relevant to the Design Works. All significant environmental risks and opportunities of the Design Controls to avoid, reduce and mitigate the identified significant environmental risks The Designer's roles and responsibilities needed to meet the environmental requirements Environmental performance data of significant items in the design (e.g. Building

Research Establishment Environmental Assessment Method (BREEAM)/ The Civil Engineering Environmental Quality and Assessment Scheme (CEEQUAL) rating) [2+]

118049 PRS - 2654

For any of the above requirements that are not considered relevant, the EDP shall adequately justify why they have not been considered or why they are not relevant to the design. 118049 PRS - 1216


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3.1.3 SCADA The single option designs approved at AiP stage shall form the SCADA solution and be taken forward into detailed design and implementation. 118049 PRS - 1280 A HMI shall be installed at all Distribution locations to provide local control, indication and alarming of switchgear. The HMIs shall not duplicate the SCADA system, they shall use IEC61850 extended station bus. Standard IEC61850 HMIs shall be fitted to all sites and the HMIs shall be used for all local control. 118049 PRS - 2833

It is proposed the HMI will be used by the maintainer to operate switchgear whilst in a position of safety.


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Foundation design shall incorporate electrical properties such that the combined system earthing impedance is less than 1. 118049 PRS – 1350

Investigation for foundation design shall be sufficient to avoid damage to buried assets including drains and cables. Where foundation work is undertaken in close proximity to existing drains, CCTV or similar shall be used post construction to confirm existing drains have not been damaged. The GWEP delivery team shall produce a strategy and agree with appropriate Route Asset Managers to define the processes to be followed. 118049 PRS – 1352

Suitable protective coatings shall be applied in order to achieve minimum maintenance intervention period of 40 years. 118049 PRS - 2836

3.1.4.5 Tensioning Devices

Catenary and contact wire shall employ tensioning systems as defined within Series 1 design rules. Where reasonably practicable, the wiring configuration shall be arranged so that tensioning devices are not located in tunnels or other areas with restricted maintenance access. 118049 PRS – 1364

3.1.4.6 Insulators

Insulators shall not require routine maintenance cleaning throughout their lifespan, except in designated pollution areas and tunnels. 118049 PRS - 1367

Polymeric insulation with a lifespan equivalent to that of the support and registration assembly shall be used. New build factor of safety shall be of sufficient magnitude to ensure minimum factor of safety of 2.0 remains throughout the lifespan of the insulator. 118049 PRS - 1369 Polymeric insulators have been manufactured to meet existing specifications, e.g. the same creepage paths as presently used ceramics. Frangible interfaces shall be considered where breaking loads for new polymeric insulators exceed those of the principal registration support assembly or main structural steelwork. 118049 PRS - 1371

For areas liable to a greater than normal level of pollution (including restricted height bridges & tunnels), polymeric insulation shall be designed to achieve a minimum maintenance intervention period of 10 years. 118049 PRS - 1373

3.1.4.7 Isolators & Switches


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Registration assemblies in bridges & tunnels shall be of ‘free running’ design where reasonably practicable. Twin and parallel contact wire arrangements shall only be used in special cases of restricted clearance subject to achieving peak contact force compliance. 118049 PRS - 1396 Anti-bird deterrents (e.g. secondary insulation, spikes etc) shall be installed where static electrical clearance < 300mm. 118049 PRS - 2926

Special engineering solutions involving earthed sections of OLE may be considered where it is not reasonably practicable to reconstruct or implement track lowering to achieve electrification clearance. Design proposals <200mm static electrical clearance or special engineering solutions involving 'earthed sections' shall be agreed with the RAM (E&P) as the evaluation process will need to consider increased risk of trains being stranded in the earthed section along with infrastructure reliability and maintenance implications. Conductor beam arrangements can be used if headroom permits and track quality is sufficient to avoid accelerated wear of the contact system. Where reasonably practicable, OLE shall be located away from features where running water could flow or icicles can form (e.g. open ventilation shafts). Where unavoidable the OLE shall be protected (e.g. fitment of protective screens / covers to divert water away). Access for maintenance and inspection shall be considered. 118049 PRS - 2667

3.1.4.11 Conductors / Wires

Return screening conductors and earthwire conductors shall be routed and positioned or otherwise protected to deter theft. 118049 PRS - 2668

All sheathed cables shall be clearly identified using markings as agreed with the British Transport Police. 118049 PRS – 2841

Unique cable identification (e.g. Smart Water, Red Web) or cable monitoring systems (e.g. Sentry 500) shall be provided for all conductors vulnerable to theft. 118049 PRS - 1408

AT Feeder, Return Conductors or earthwire shall not be routed directly above S&T equipment that is not directly bonded to the traction return system. 118049 PRS - 1412

ATF electrical clearance shall be designed on the basis that the ATF will be isolated and earthed in conjunction with its associated overhead catenary system. 2.75m safety clearance (between personnel working on the catenary equipment and the adjacent ATF wire) will not normally be required. There may be exceptions to consider at switching section sites however where cross track routing of electrical feeders is necessary and it would be impractical or disruptive to isolate all feeders for routine maintenance on a single line.


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118049 PRS – 1416

Locations where either the ATF or associated bare cross-track connections are routed across conductors shall be minimised. 118049 PRS – 2842

For stranded conductors, an absolute minimum clearance of 660mm (25kV AC to Earth or phase to phase) shall apply under all conditions taking account the effects with effect to movement/sag of ambient temperature, heating due to electrical load, dynamic movement in wind conditions, conductor creep and installation and maintenance tolerances. 118049 PRS – 2843

Routing of copper conductors above or horizontal in close proximity (< 100mm) to aluminium shall be avoided to prevent copper washings & dissimilar metal corrosion. 118049 PRS – 2844

Arc protection (e.g. insulated sheathing) shall be added to stranded conductors vulnerable to arc damage (e.g. at bridges & carrier wire neutral sections). 118049 PRS – 2845

The number of joints, splices & connectors shall be kept to a minimum. 118049 PRS - 2846

3.1.4.12 In Span Assemblies

Cross contact assemblies shall not be installed in grading contact wire height where line speed exceeds 80mph and only where reasonably practicable at lower line speeds. They are permissible in 'level' contact wire design subject to justification that their use provides the best whole life solution. 118049 PRS - 2669

3.1.4.13 Screening & Protection

Requirements for protective provisions against direct contact shall be in accordance with BS EN 50122-1: 2011 + A1:2011 section 5. This shall include (but not necessarily be limited to) safety clearance from standing surfaces and requirements for screens. For clearances to live parts of the OLE system including supports, the clearance provided in public areas shall comply with EN 50122-1: 2011 + A1:2011 section 5, without application of the UK special national condition shown in Annex G of that standard. For clearances to live parts of trains, either (1) the clearance provided in public areas shall comply with EN 50122-1: 2011 +

A1:2011 section 5, without application of the UK special national condition shown in Annex G of that standard, or

(2) the project shall provide evidence including appropriate risk assessment to

demonstrate that any safety risk has been reduced as low as reasonably practicable.


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In case of (2) the project shall demonstrate that any relevant derogations against Network Rail standards, Railway Group Standards or TSI are in place. 118049 PRS – 1426

Anti-climb guards shall be fitted to climbable structures (e.g. double channel, fabricated angle or lattice) located in areas of public access and known trespass and vandalism locations. 118049 PRS - 2670

3.1.4.14 Neutral Sections

Neutral sections shall be installed in compliance with CP5 E&P Policy (policy is available via RAM (E&P)). 118049 PRS - 2672

Where reasonably practicable, discrete sectioning devices shall not be installed in grading contact wire. 118049 PRS - 2673

Neutral section positioning with respect to signals shall avoid any risk of a pantograph coming to rest within the dead section with the train held at a signal. 118049 PRS - 2928

Neutral section positioning and design shall allow for all vehicle combinations as shown in requirement ‘118049 PRS – 2661’. 118049 PRS - 2929

3.1.4.15 Section Insulators

All section insulators shall be compatible with single strip pantograph heads (e.g. closed frame or overlapping skid type). Ceramic bead type section insulators shall not be used. 118049 PRS - 2674

Section insulator positioning with respect to signals shall avoid risk of a pantograph coming to rest in the section insulator assembly with the train held at a signal. Design positioning shall allow for all vehicle combinations as shown in requirement ‘118049 PRS – 2661’. ‘In line’ discrete sectioning devices (e.g. section insulators) shall be avoided in main line wire runs. 118049 PRS - 1440

3.1.4.16 Earthing & Bonding (including DEP’s)

Existing equipment within the OLE contact zone and other equipment subject to the potential fault current of the system (nominally 12kA) shall be proven compatible or modified appropriately to these fault levels. Mechanical connections / joints & clamps subjected to flow of traction load or fault current shall have an electrical rating that exceeds the system operating and fault clearance ratings so as not to be damaged by repeated flow of fault current, or continuous flow of rated


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Track datum markers shall be provided at bridges, tunnels and other locations where reduced track position tolerance is necessary to maintain reduced electrical clearance. 118049 PRS – 1463

Electrical hazard signs (152mm circular) shall be fitted to the OLE at locations where it is not possible within existing safety rules to undertake routine maintenance inspection with adjacent line live, (e.g. unscreened adjacent live OLE closer than 600mm). 118049 PRS - 1465

3.1.4.18 OLE Overrun protection

Contact wire overrun protection shall be provided at locations where a train can be misrouted onto a non-electrified line resulting in a de-wirement, loss of pantograph head or vehicle stranding that affects planned operational services. Recovery of the service shall be considered in the length and design of overrun protection. 118049 PRS – 1468

3.1.4.19 OLE Remote Condition monitoring

Remote condition monitoring of wind activity is required in areas where full design deviation allowance is compromised and wind-related stagger exceedences are calculated to occur (locations incorporating special engineering solutions). 118049 PRS – 1471

Remote condition monitoring of contact wire uplift shall be installed where OLE uplift capability can be exceeded (locations incorporating special engineering solutions). 118049 PRS – 1475

Remote condition monitoring of conductor tension shall be provided at all locations where restricted maintenance access exists for the inspection of spring tensioning devices. 118049 PRS – 2931

The project shall provide installations for the measurement of pantograph uplift and pantograph head condition by the use of remote measurement & inspection technology of service trains. Installation locations shall be selected from those currently used for Wheelchex / Gotcha monitoring. Sufficient locations shall be provided so that all pantographs operating on the route are monitored at or near the line speed for the unit. Note: a suitable system is currently on trial at Cheddington on WCML. 118049 PRS – 2932

Remote condition monitoring installations shall report in to existing RCM data collection points consistent with ‘Intelligent Infrastructure’ requirements. 118049 PRS – 2933

3.1.4.20 OLE Boundaries and Interfaces

Maidenhead (Project Interface) The OLE design shall be compatible with the wiring Interfaces at Maidenhead. The interface shall be at the overlap at the end of a tension length. 118049 PRS - 1478


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Signalling power assessments should be undertaken at Signalling Principal Supply Points to confirm adequacy of the supply and existing feeders for load increases as a result of signalling changes (such as installation of banner repeaters, relocation of signals etc). Signalling lineside power supplies shall require assessing for their overall lengths relative to the affects of EMI and may require modifying. The assessment shall take into account any necessary requirements for Earthing and bonding of equipment and personnel protection purposes, whilst providing any necessary protection or isolation measures to prevent damage from lightning and power supply surges or malfunction. 118049 PRS – 1513

Provision shall be provided for future deployment of a traction standby connection to all existing Mainline signalling Principal Supply Points (PSPs). This shall be by provision of an additional spare switch at Section/Feeder sub-stations in close proximity to new and existing PSP locations, or by structure-mounted OLE switchgear at PSP’s requiring trackside connection. The following CP5 EP policy statement applies: New electrification shall consider the requirements for supplying auxiliary loads (PSP, Points Heating etc.) from the OLE system and shall make suitable provision to enable the cost effective connection to be made at a future date. 118049 PRS - 1516

To minimise the risk of cable theft the CPC in all systems shall be integral with the phase conductors where multi conductor cables are used. 118049 PRS - 1518

3.1.5.3 DNO Supplies

A survey of the existing DNO supplies shall be undertaken to determine the need for any new or altered DNO requirements. 118049 PRS - 1524

Where new supplies are required - loads shall be combined where possible to reduce the number of Distribution Network Operator (DNO) supply points. This includes supplies to signalling, telecoms, feeder stations, Hot Axle Box Detectors (HABD's), points heating, junction and tunnel lighting. 118049 PRS – 1495

Where existing DNO supplies are to be used, the adequacy and rating of the supply for the total new installation shall be established at the reference design stage. These shall be established by: 1) Survey of existing supplies for capacity and conformity to the latest standards and legislation. 2) Existing supply capacity shall be determined. 3) Determining the need for new or upgraded supply points, based on new load estimates plus 20% spare capacity. 4) Integration of DNO supplies shall be achieved as far as is reasonably practicable. Load monitoring may be required on the incoming DNO supplies. The existing DNO supplies may provide supplies to points heating equipment, relay room domestic equipment and various trackside cabins. 118049 PRS - 1526


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Where existing capacity is sufficient for the new design, but would leave less than 20% spare capacity, or if a new supply will require a higher kVA rating band purely to achieve the spare capacity, then the details shall be agreed with the RAM (E&P), prior to application for a new/altered supply point. 118049 PRS – 1534

The Generic Technical Workscope NAT/TW/Infrainv/ENG/EP6248683 issue 3 shall be applied. 118049 PRS - 1535

Where reasonably practicable, new electrical distribution cubicles shall be positioned such that meters can be read by the local DNO without having to go onto Network Rail property. For locations where this is not practicable then the position shall be agreed with the RAM (E&P). 118049 PRS - 1537

Where new Low Voltage (LV) supplies are required connection shall be arranged as follows (system definitions are in accordance with BS7671 2008 (incorporating amendment No.1 2011) Requirements for electrical installations 17th Edition);- Critical Supplies TN Connection (preferred) Or TN Connection plus isolation transformer to segregate DNO and Network Rail earthing Systems e.g. where traction derived alternative supplies are provided. Or TT Connection plus isolation transformer which is located <10m but >2.5m from DNO intake cabinet with an RCD in the feed arrangement from DNO cabinet. The cable armouring shall be gapped at the point of entry to the primary side of the isolation transformer. The secondary side shall be connected in a TN arrangement Or Non Critical Supplies TT connection with residual Current Device (RCD) protecting load (non preferred for operational supplies). 118049 PRS - 1539

SSE Power Distribution has confirmed TN connections can be provided where an Earth Potential Rise (EPR) of 650V maximum occurs with a protection time of less than 0.2s. The project shall arrange similar agreement with Western Power Distribution to avoid the requirement for isolation transformers. 118049 PRS – 1549

Existing PME supplies shall be reviewed with the DNO, where bonding to traction earth is required. 118049 PRS - 1550

The negotiation of the energy supply agreement and tariff with the DNO is the responsibility


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Asset Records Policy – the project shall handback asset information in accordance with the CP5 EP Policy, in advance of ‘transfer of maintenance responsibility’, specifically: Every electrical network shall have:

diagram(s) of the electrical network showing interconnections between plant items including switchgear configurations, together with location(s).

diagram(s) showing normal and abnormal feeding arrangements, together with any applicable operational limitations

documented fault levels at all supply interface points diagram(s) showing protection scheme functionality diagram(s) showing remote control and remote data monitoring functionality,

including communications connections between locations and to control centres, documented protection settings, and supporting calculations, for all protection

devices, including fuses documented operation and maintenance instructions for each type of plant and

switchgear connected to the network, including safe methods for isolation and earthing and any type restrictions

a documented register of plant and switchgear equipment connected to the network detailing

o equipment manufacturer o type of equipment o serial number o year of manufacture o date of installation o normal continuous ratings o short-term overload ratings o short-circuit rating o maintenance records and failure history o normal and fault operating records for switchgear o estimated renewal date o estimated renewal date o switchgear SF6 quantities o quantities and locations with PCB’s o equipment and location using asbestos or other hazardous materials.

documented test results for earth resistivity and predicted rise of earth potential at

each earthed location under fault current conditions. 118049 PRS - 2857


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The project shall handback all relevant asset information for overhead line equipment in advance of ‘transfer of maintenance responsibility’, including the following assets as a minimum:

Overhead line structures (including all bridge and tunnel supports) Wire runs (including in-line wire runs and other along-track conductors) Isolators and fixed earthing devices where applicable Neutral Sections (discrete devices and carrier wire types) Section Insulators Conductor beam sections

Information to be provided shall include, but not be limited to:

All equipment and system configuration information (for example, location, equipment type, serial or batch numbers)

All asset data from testing and commissioning, to include contact force, longitudinal

acceleration and as-built height and stagger data.

As built records

Any specific performance and safety risks relevant to a particular location, for example locations with reduced electrical clearances or agreed non-compliances to the design standards.

118049 PRS - 2934


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3.2 SIGNALLING ASSETS Signalling immunisation requirements for the route are referenced in the document; EMC, Immunisation, Earthing & Bonding and Power Supply Strategy - Western Mainline Signalling Renewal. Also refer to Western and Wales Earthing & Bonding strategy ref: 118049-IED-REP-ESE-000025 Testing and commissioning plans shall be developed jointly between Re-signalling and Electrification projects so as to take account of the interface with the signalling system (bonding, interference etc). Such additional tests as may be required to demonstrate that there is no adverse affect on the signalling system shall be incorporated in the OLE testing and shall be delivered by the project. 118049 PRS - 1907

The records relating to any signalling assets affected by the works shall be updated and returned to the NRG within six weeks of that equipment being brought into use (or the full update information returned to the lead design organisation in time for this to be met in cases where parallel or overlapping design agreements are required.) 118049 PRS - 1909

After any change to signalling assets, a full set of signalling maintenance records shall be available on site at all locations where records for that installation are held (loc, REB, interlocking, signal box, maintenance manager etc) at the time of commissioning. 118049 PRS - 1911

After any change to signalling assets by the works, joint consideration with the Maintenance Manager to a revised spares holding shall be assessed, agreed and delivered by the project. 118049 PRS - 2935

The location, position and form of all new structures for OLE or signs shall be the subject of consideration by the signal sighting process to consider the effect on any signals in the area and shall be in accordance with the WMSR Signal Sighting Strategy (CCMS reference 62086859). The new electrification equipment shall be designed so as to avoid the requirement to alter or re-locate any signalling assets so far as is reasonably practicable. 118049 PRS - 1913

The project shall have in place a process to capture and review reports from drivers relating to signal sighting queries post installation of any OLE equipment. An action plan for each report by a driver shall be produced within 7 days of the incident and shall include prioritisation and proposal of a timescale to close out the issue. The process shall be in place until formal handover procedures are complete or such later time as may be agreed during handover. 118049 PRS - 1915

The signalling renewal work to provide immunisation shall be complete for the relevant area and the buffer zone prior to any energisation of OLE equipment, including feeder stations, whether for testing or for other purpose. Where Signalling project scope definitions were incomplete because the detail of the OLE system specification or design was not known, the output of the signalling project shall be reviewed against the final OLE requirements and any gaps addressed with a suitable outline design at GRIP4 and presented with a plan for delivery of the work, either as a standalone project or as an alteration to the work already underway. 118049 PRS – 1917

Where transmission equipment for signalling equipment requires modification (eg provision of data link isolating transformers or other sectioning), the project shall assess the implication


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on the performance of the system and consider any alterations that may be required to the monitoring systems and routine maintenance including additional spares. 118049 PRS – 1918

The WMSR work will have taken account of traction return bonding in as far as the system was defined at the time of design. Details of track circuit bonding alterations required to suit the final traction return system shall be given in the outline design. This will include the proposal for the type of track circuit, the lengths, the form and position of impedance bonds and the location of all insulated rail joints (including ‘blocking off’ joints and bonds). 118049 PRS – 1919

All proposals for alteration of the signaller's display to accommodate any changes resulting from signal moves, train detection alterations, neutral sections, isolation reminders etc, shall require ergonomic assessment where there is a change to the signaller's workload. All designs for screen alteration shall be submitted to both the RAM Signalling and Operations Manager for approval. 118049 PRS - 1920


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3.3 TELECOMS ASSETS

3.3.1 General A formal Reference System Design (RSD) for Approval in Principle (AIP) shall be submitted to the National Telecoms Asset & Performance Manager [SW&W]. 118049 PRS - 2093

No Telecoms equipment shall be disturbed and/or modified until Telecoms AIP has been authorised by the NTA&PM [SW&W], and all subsequent detailed design works have been completed. 118049 PRS - 2096

FTN project specifications are currently held by the National FTN/GSM-R group however, many are in the process of translation into Network Rail Company Standards – compliance shall be ensured in either presentation. 118049 PRS - 2097

Where it is proposed that equipment is to be altered but retained, a risk based condition assessment shall be carried out. The output of this assessment shall be used to justify any alteration proposals, for agreement. 118049 PRS - 2099

Where it is proposed that existing equipment is to be retained, the Project shall identify where re-use impacts upon the specified levels of reliability and availability, including all diversity requirements. 118049 PRS - 2101 Signalling control for the Swindon IECC, Swindon PSB, Oxford PSB and Bristol PSB control areas shall be progressively re-controlled to the TVSC from 2012 to 2017 – once re-control of the aforementioned signal boxes to the TVSC is complete, their independent SPT concentrator systems will be made redundant, with management of all associated line side telephony having been transferred to the TVSC SPT concentrator system. For the purposes of this project, all active SPT concentrator systems, and associated line side telephone instruments will be retained. To note: 1. Swindon IECC re-control to TVSC was completed in December 2012 2. Oxford PSB re-control to TVSC is due in May 2015 3. Swindon PSB re-control to TVSC is due in April 2014 4. Bristol PSB re-control to TVSC is due in stages, with the latter stage in April 2017 Operational telecommunications requirements shall align with those of the numerous GWML re-signalling projects that are currently underway. This project shall undertake suitable and sufficient project interfacing to fully understand the future operational telecommunications requirements and associated works for the existing signalling control centre areas covered by the TVSC, Slough PSB, Oxford PSB, Swindon PSB, Bristol PSB and SWCC. 118049 PRS – 2108

A review of the arrangements for voice communications with the Electrical Control Room shall be undertaken by the project. This review will consider the requirements for direct lines from signalling control points to ECR and short code emergency dial facilities, as required by the Group Standard. 118049 PRS - 2110


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A Third Party Service Interface summary shall be produced, detailing; all Third Party services to be affected by this project, those to be retained and those to be ceased. Any services provided by a Third Party, e.g., Level 3 or BT, that become superseded by this work shall require notice of cessation to be served by contacting the Head of Customer & Services Management, NRT Confirmation from each respective Third Party will be required that their infrastructure will not be adversely impacted by this project and, if this is not the case the project shall propose actions to be taken in order to safeguard Third Party cables. 118049 PRS - 2112

Irrespective of the electrification system selected, all new telecoms cables shall be designed to be a.c. immune. 118049 PRS – 2699

3.3.2 Telecoms Bearer Network FTN copper, fibre and transmission infrastructure/systems shall be utilised as the preferred solution. 118049 PRS - 2685

All circuits shall be designed to provide immunisation against the OLE operating with a 25kV-0-25kV Auto-Transformer system design with 12kA possible fault currents. 118049 PRS - 2686

Confirmation of the availability of FTN transmission, or extent of work required to enable the transmission requirements of this scheme, shall be addressed in conjunction with NRT. 118049 PRS - 2687

Diversity shall be provided, wherever possible, by the FTN system. 118049 PRS - 2688

Detailed justification for any proposal to implement infrastructure other than NR’s FTN network shall be presented for NTA&PM [SW&W] consideration, as part of the RSD submission. 118049 PRS - 2689

Where the use of non-FTN network infrastructure has been previously agreed with the NTA&PM [SW&W], proposed alterations and/or introduction of additional equipment to legacy system arrangements shall be integrated into associated legacy monitoring systems, where these exist. 118049 PRS - 2690

The design, manufacture, installation and testing of copper and optical fibre cables shall comply with all current FTN project specifications, in addition to NR Company Standards. 118049 PRS - 2691

Within the scope of the works, the Project shall not use new and/or existing FTN REBs for anything other than the accommodation of Telecoms equipment. 118049 PRS - 2692

Within the scope of the works, the Project shall not use the Telecoms 50V battery supply to feed any other engineering discipline equipment, e.g. Signalling. 118049 PRS - 2693


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Asset Engineer. Asset Management Plan Content (AMP003) – Agreement of relevant AMP products

with the Asset Engineer (Structures), Owned and Managed by the Project manager. Dilapidation Survey (AMP010) – Review of available Network Rail records,

supported with site condition surveys, targeted at the proposed works. Note: dilapidation survey with RAM (Structures) team involvement to be undertaken as part of the AMP requirements.

Supplementary Inspections (AMP011) – A revised Detailed Examination is required to update information within the Structures Asset Database (CARRS or similar), to include an updated BCMI (Bridge Condition Marking Index) Score

Notification of Asset Change (AMP012) – revised capability and construction details to be provided to update Asset Information systems. Information to include capacity, as determined by design or assessment, Vehicle Incursion score, maintenance Strategy. Note: RAM (Structures) team to be included in AMP process as a Maintainer.

Core Work Completion Certificate (AMP014) – Notification of substantial completion to the RAM (Structures) Interface Co-ordinator.

Taking Over Certificate (AMP015) – Joint site walk out with the RAM (Structures) Interface Co-ordinator, Project manager and Project Works Contractor.

Defect Identification and Completion Certificate (AMP016) - Populated during the Taking over site walkout and updated by the Project Manager.

Health and Safety File Required upon completion of the works, Including As-built records and ongoing maintenance requirements. 118049 PRS - 2941


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Evaluate effects of Track lowering on stepping distances at stations and detail in Form A submission for RAM (Buildings) approval. 118049 PRS - 2430

3.7.8 Canopies Where structures are identified as being foul of the required electrification gauge clearance: Identify canopies requiring work to facilitate electrification (Feasibility Report should

consider existing renewals proposals). Move existing fittings to a safe distance from the OLE allowing CDM compliant access.

Any lighting moved shall comply with CPPM-42 and provide a minimum of 10 LUX at platform edge (with or without a train in platform).

Select the option that minimises disruption consistent with WLC considerations. Minimise future maintenance, e.g. consider use of GRP for replacement Dagger boards. 118049 PRS - 2737 RAM (Buildings) and TOC/FOC are to be consulted as part of option selection process. 118049 PRS - 2943 Be aware there may be asbestos sheeting: refer to the ARMs database.

3.7.9 Platforms Routing of cables along platforms and fixing methods shall be consulted with the RAM (Buildings) 118049 PRS - 2441

3.7.10 Environment Consideration should be given to BREEAM in the design of new buildings. 118049 PRS - 2443

3.7.11 Project Interfaces

The Integrated Stations Plan (ISP) shall be populated with all planned works at Stations to enable coordination of works. The planned work shall be informed to the RAM (Buildings) team in order for this to be populated. 118049 PRS - 2445

Sight of Blockade plans shall be provided to the RAM (Buildings) team to allow for efficient working / shared use of possessions. 118049 PRS - 2446


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4 APPENDIX A – ENGINEERING DELIVERABLES

See attached spreadsheet


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5 APPENDIX B – GLOSSARY OF ABBREVIATIONS

ACOP Approved Code of Practice AFIL Audio Frequency Induction Loops AIP Approval in Principle ALCRM All Level Crossing Risk Model AMP Asset Management Plan AMR Automatic Meter Reading ARM Active Risk Manager AT Auto Transformer ATF Auto Transformer Feeder ATFS Auto Transformer Feeder Station ATS Auto Transformer Station AWS Automatic Warning System B & H Berks and Hants BREEAM Building Research Establishment Environmental Assessment Method BT British Telecom BTP British Transport Police CASR Cardiff Area Signal Renewals CB Central Battery CCTV Closed Circuit Television CDM Construction (Design and Management) Regulations 1994 CEEQUAL Civil Engineering Environmental Quality and Assessment Scheme CIBSE Chartered Institute of Building Services Engineers CIS Customer Information Systems CME Circuit Main Earth CMS Central Management System CPC Circuit Protective Conductor CP4 Control period 4 (2009 to 2014) CP5 Control period 5 (2014 to 2019) CP6 Control period 6 (2019 to 2024) CSA Cross Sectional Area CSR Cab Secure Radio CUI Capacity Utilisation Indices CWR Continuously Welded Rail G&CA Government and Corporate Affairs DDA Disability and Discrimination Act DEP Designated Earth Point DfT Department for Transport DFO Depot Franchise Operator DLID Data Link Isolation Device DMU Diesel Multiple Unit DNO Distribution Network Operator DPE Designated Project Engineer DRAM Director of Route Asset Management E & B Earthing and Bonding E & P Electrification and Plant ECC Electrical Control Centre ECO Electrical Control Operator ECR Electrical Control Room ECRO Electrical Control Room Operator


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EDP Environmental Design Plan EIA Environmental Impact Assessment ELR Engineer’s Line Reference EMC Electromagnetic Compatibility EMGTPA Equivalent Million Gross Tonnes Per Annum EMI Electromagnetic Interference EMU Electric Multiple Unit EPR Earth Potential Rise EPS Enhanced Permissible Speed ERTMS European Rail Traffic Management System ERO Engineering Requirements Owner FED Fixed Earthing Device FGW First Great Western FOC Freight Operating Company FRACAS Failure Reporting Analysis and Corrective Actioning System FT Fixed Tension FTN Fixed Telecommunications Network GCP Gauge Capability Programme GF Ground frame GLCT Ground level concrete troughing GLCR Ground level cable route GRIP Governance for Railway Investment Projects GRP Glass Reinforced Plastic GSM-R Global System for Mobile Communications - Railway GWML Great Western Main Line GWMLe Great Western Main Line Electrification HABD Hot Axle Box Detector HAZOP Hazard and Operability Study HOP High Output Plant HLOS High level output specification HMI Human Machine Interface HMRI Her Majesty’s Rail Inspectorate HP Help Points HST High Speed Train HV High Voltage IBJ Insulated bolted joint (signalling) IECC Integrated Electronic Control Centre IEP Intercity Express Programme ILM Insertion Loss measurement IPC Integrated Protection and Control ISP Integrated Stations Plan LED Light Emitting Diode LV Low Voltage M & E Mechanical and Electrical MART Mean Active Repair Time MENTOR Mobile Electrical Network Testing Observation And recording Coach MFD Major Feeding Diagram MML Midland Mainline MPATS Mid Point Auto Transformer Station MTBSAF Mean Time Between Service Affecting Failures MTTR Mean Time To Repair


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MVA Moving Annual Average NECC National Control Centre NDS National Delivery Service NG National Grid NMT New Measurement Train NR Network Rail NRG National Records Group NRN National Radio Network NRT Network Rail Telecoms NTA & PM National Telecoms Asset & Performance Manager NWE North West Electrification OFGEM Office of the Gas and Electricity Markets OLE Overhead Line Equipment OPEX Operating expenditure OS Ordnance Survey OTDR Optical Time Domain Reflectometer PA Personal Address PAN Pantograph PDR Permitted Development Rights PPM Passenger Performance Measure PM Point modules (signalling) PRS Project Requirement Specification PS Permissible speed PSB Power Signal Box PSP Principal Supply Point P-TAD Partial - Through Alignment Design PTW Permit To Work PZT Points Telephone RAM Route Asset Manager RAMS Reliability, Availability, Maintainability and Safety RA Route Availability (RA) classification system RCD Residual current Device RCF Rolling Contact Fatigue REB Remote equipment building REFOS Running Edge to Face of Steel ROC Regional Operation centre ROEP Rise of Earth Potential RRAP Road/Rail Access Points RSD Reference System Design RSAR Reading Station Area Redevelopment RSC Return Screen Conductor RTU Remote Terminal Unit RUS Route Utilisation Strategy S & C Switches and Crossovers S & T Signalling and Telecommunications SATS Sectioning Auto Transformer Station SB Signal box SCADA Supervisory Control and Data Acquisition SDG Signalling Design Group SFN Strategic Freight Network SFO Station Franchise Operator SIN Special instruction notice


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SI Sponsor’s Instruction SISS Station Information, Security and Surveillance SOSR Single Option Selection Report SPDSG Signalling Power Design Steering Group SPT Signal Post Telephone SSC Signal Sighting Committee SSI Solid state interlocking (signalling) SWCC South Wales Control Centre SWSC South Wales Signal Centre TAD Through Alignment Design TDM Time Division Multiplier (signalling) TC Track circuit (signalling) TEN Trans-European Network TiCled Tight Clearance Database TIIS Train Infrastructure Interface Specification TNC Technical Non Conformance TOC Train Operating Company tph Train(s) per hour TPSS Traction Power Supply Strategy TPWS Train Protection Warning system TSI Train Specification for Interoperability TVSC Thames Valley Signal Centre UPS Uninterruptable Power Supply UTX Under track crossing VDU Visual Display Unit WCML West Coast Mainline WPIT Western Programme Integration Team WMSR Western Mainline Signal Renewals


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6 APPENDIX C – OLE/TRACK CLEARANCES

The following table can be used to derive standard clearances between 25kV overhead line equipment and bridges and structures, instead of section A.8.4 of the track design handbook.

Fitted bridges Free running

bridges With track lowering Yes No Yes No

Passing electrical clearance (to soffit) - minimum

200 200 200 200

Sta

tic c

lear

ance

(s

ee n

ote

2)

OLE uplift allowance(See note 3)

80 80 150 150

OLE positional tolerance 10 10 25 25

A

OLE construction depth – minimum(See note 4)

120 120 400 400

OLE positional tolerance 10 10 25 25

Passing electrical clearance

(to vehicle) – minimum(see note 5)

200 200 200 200

Kinematic load gauge 4015 4015 4015 4015

Track positional tolerance 15 15 15 15

Track maintenance lift allowance

(see note 6) 75 75 75 75

Track installation allowance (see note 7) 25 0 25 0

Minimum height of structure above rail level 4750 4725 5130 5105

Minimum design contact wire height (see notes 5 & 6)

4315 4330

Absolute minimum contact wire height during asset life

4215 4215

Notes

1. Fitted bridges are those with OLE supports at the bridge, such as twin contact wire or parallel contact wire bridges.

2. Table assumes that passing electrical clearance with dynamic uplift will be the worst case.

For different configurations, static clearances should also be satisfied.

3. OLE uplift allowance shown in this table is indicative and should be derived from the Series 1 system design manual.


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4. OLE construction depth may need to be increased depending on the OLE arrangement and support type for a particular location.

5. Passing clearance to vehicle can be reduced to 150mm at fitted bridges where the track

maintenance lift allowance has been applied. In this case the minimum design contact wire height will be 4265mm.

6. Track maintenance lift allowance can be reduced to 25mm in station platform areas.

7. Track installation allowance: installation of track with substandard ballast depth may be

considered to contribute towards the overall requirement for future track lifting with the agreement of the Route Asset Manager (Track).

8. These standard heights will not necessarily apply where the structure is located within 1km of

a level crossing at line-speeds up to 125mph or is adjacent to an existing low-clearance bridge. In these cases a location specific design shall be required.

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