Document Classification: Controlled Disclosure Wrapped... · Document Classification: Controlled Disclosure ... MV Medium Voltage N Newtons ... stripping device shall be specified

Document Classification: Controlled Disclosure

EXTERNALLY ATTACHED (HELICALLY WRAPPED) FIBRE OPTIC CABLE

Unique Identifier: 240-42990189

Revision: 2

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Content

Page

1. Introduction .................................................................................................................................................. 3

2. Supporting clauses ...................................................................................................................................... 3

2.1 Scope ................................................................................................................................................. 3

2.1.1 Purpose .................................................................................................................................. 3

2.1.2 Applicability ............................................................................................................................ 3

2.2 Normative/informative references ...................................................................................................... 3

2.2.1 Normative ............................................................................................................................... 3

2.2.2 Informative ............................................................................................................................. 4

2.3 Definitions ........................................................................................................................................... 4

2.3.1 General .................................................................................................................................. 4

2.3.2 Disclosure classification ......................................................................................................... 4

2.4 Abbreviations ...................................................................................................................................... 4

2.5 Roles and responsibilities .................................................................................................................. 5

2.6 Process for monitoring ....................................................................................................................... 5

2.7 Related/supporting documents .......................................................................................................... 5

3. Requirements and Testing .......................................................................................................................... 6

3.1 Requirements ..................................................................................................................................... 6

3.1.1 Fibre ....................................................................................................................................... 6

3.1.2 Cable Configuration ............................................................................................................... 6

3.1.3 Mounting and Suspension Hardware ..................................................................................... 7

3.1.4 Installation Procedure ............................................................................................................ 7

3.1.5 Environmental ........................................................................................................................ 8

3.2 Tests ................................................................................................................................................... 8

3.2.1 Optical .................................................................................................................................... 8

3.2.2 Mechanical/Electrical ............................................................................................................. 8

3.3 Marking, labelling and packaging ..................................................................................................... 11

3.4 Jointing and Commissioning ............................................................................................................ 11

3.5 Training ............................................................................................................................................ 11

3.6 Documentation ................................................................................................................................. 11

4. Authorization .............................................................................................................................................. 12

5. Revisions ................................................................................................................................................... 12

6. Development team .................................................................................................................................... 12

7. Acknowledgements ................................................................................................................................... 13

Annex A – Contractual - Schedule A/B - Technical Particulars ........................................................................ 14

Tables

Table A.1: Example Statement of Compliance ................................................................................................. 16




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1. Introduction

The document provides a specification for helically wrapped, all-dielectric, fibre optic cable for installation on either the earth-wire of HV or EHV transmission lines, or, in some cases, on a phase conductor of an MV power line where no earth-wire has been installed.

2. Supporting clauses

2.1 Scope

This specification describes the cable design, properties of the fibre and the cable, testing at works, delivery to site, offloading, installation, and optionally, jointing and commissioning of all dielectric externally attached aerial fibre optic cable system between two or more Eskom installations.

The cable contains optical fibres for data transmission and is helically wrapped around the earth-wire of power lines operating at voltages from 66 kV to 400 kV. It should be noted that the temperature of the earth-wire can rise to 300ºC for 1 second under fault condition. The earth-wire is insulated from the tower at certain positions, giving rise to the possibility of electrical degradation when the sheath of the dielectric fibre optic cable becomes polluted and hydrophilic with age.

2.1.1 Purpose

There is a requirement for a specification for externally attached aerial fibre optic cable, a technology which can provide an opportunity for rapid repair of existing fibre optic installations if required. The technology allows for the possibility of live-line installation for retrofitting fibre optic cable on existing power lines as part of the expansion of Eskom’s telecommunication system.

2.1.2 Applicability

This document shall apply throughout Eskom Transmission, Distribution and Eskom Telecommunications Divisions.

2.2 Normative/informative references

Parties using this document shall apply the most recent edition of the documents listed in the following paragraphs.

2.2.1 Normative

[1] IEC 60793-1, Optical Fibres - Part 1-1: Measurement methods and test procedures – General and Guidance

[2] IEC 60068-1, Environmental Testing – Part1: General and Guidance

[3] IEC 60068-2-5, Environmental Testing – Part 2: Tests. Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing

[4] IEC 60793-1-47, Optical fibres — Part 1-47: Measurement methods and test procedures — Macro-bending loss

[5] IEC 60794-1-1, Optical fibre cables — Part 1-1: Generic specification — General

[6] IEC 60794-1-2, Optical fibre cables - Part 1-2: Generic specification - Basic optical cable test procedures

[7] IEC 62217, Polymeric insulators for indoor and outdoor use with a nominal voltage outdoor use with a nominal voltage 1 000V – General definitions, test methods and acceptance criteria

[8] IEEE 1594, Standard for Helically Applied Fibre Optic Cable Systems (Wrap Cable) for Use on Overhead Utility Lines




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[9] ITU-T Recommendation G.652, Characteristics of a single-mode optical fibre and cable

[10] SANS 10280:1, Overhead Power Lines for Conditions Prevailing in South Africa, Part 1: Safety

[11] TIA/EIA-598-A, Optical Fibre Cable Colour Coding

[12] 240-70732888, Fibre Optic Cable Acceptance Testing Procedure

2.2.2 Informative

[13] ASTM D3349-06, Standard Test Method for Absorption Coefficient of Ethylene Polymer Material Pigmented with Carbon Black

[14] IEC 60793-1, Optical fibres — Part 1: Generic specification (all sections)

[15] IEC 60793-1-30, Optical fibres — Part 1-30: Measurement methods and test procedures — Fibre Proof test

[16] IEC 60793-2, Optical fibres — Part 2: Product specifications

[17] IEC 60794-4-1, Optical fibre cables — Part 4-1: Aerial optical cables for high-voltage power lines

[18] IEEE Transactions on Power Delivery, Vol 3, No. 2, April 1988 :“Installation Experience with a Fiber Optic Cable Helically Wrapped around a Rochester Gas and Electric Corporation 115kV Transmission Phase Conductor” –R.D. Sperduto, M. K. Mitchell

[19] ISO 9001, Quality Management Systems

[20] ITU-T Recommendation G.650, Definition and test methods for the relevant parameters of single-mode fibres.

2.3 Definitions

2.3.1 General

With the exception of those listed below, for the purpose of this specification, technical terms used shall be as defined in the documents listed in clause 2.2.1 Normative.

Definition Description

Eskom Transmission/ Distribution

A division of Eskom Holdings Limited (Reg. No. 2002/015527/06) a juristic person incorporated in terms of the company laws of the Republic of South Africa, with its registered office at Megawatt Park, Maxwell Drive, Sandton, herein referred to as Eskom.

Helically Wrapped Cable

Fibre Optic cable helically wrapped onto existing overhead cable (phase conductor or earthwire)

PMD Q PMD Q means the statistical upper bound for the PMD coefficient of a fibre optic cable link composed of M number of randomly chosen concatenated fibre optic cable sections of the same length.

2.3.2 Disclosure classification

Controlled disclosure: controlled disclosure to external parties (either enforced by law, or discretionary).

2.4 Abbreviations

Abbreviation Description

µm micrometre

As Amp seconds




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Abbreviation Description

ASL Above Sea Level

cm centimetre

dB decibel

EHV Extra High Voltage

h hour

HV High Voltage

kg kilogram

km kilometre

kPa kilopascal

kV Kilovolt

m metre

mm millimetre

ms millisecond

MV Medium Voltage

N Newtons

N/A Not Applicable

nm nanometer

ºC Degrees Centigrade

Pa Pascals

PMD: Polarisation Mode Dispersion

ps picoseconds

UV: Ultraviolet

Wrt With respect to

2.5 Roles and responsibilities

It is the responsibility of Lines Engineering Services and PTM&C from Technology & Commercial to ensure compliance with this document.

2.6 Process for monitoring

Monitoring and maintenance shall be done by the fibre team from Eskom Telecommunications and reported back to Lines Engineering Services.

2.7 Related/supporting documents

N/A




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3. Requirements and Testing

3.1 Requirements

3.1.1 Fibre

3.1.1.1 All fibres shall have a cladding diameter of 125 micrometers and shall comply with ITU-T Recommendation G.652 for single mode fibres as specified in Schedule A/B to this specification. The G.652 fibre shall be capable of operating in both the 1310 nm and 1550 nm wavelength regions (single mode - dual window 1310/1550 nm.). Attenuation and dispersion characteristics of the fibre to be provided shall be as detailed in the A/B schedule.

3.1.1.2 Full details of primary, secondary and tertiary coatings (if used), shall be supplied. A suitable stripping device shall be specified.

3.1.1.3 The fibres shall be marked by a coloured coating with 12 different colours according to TIA/ EIA 598. The optical fibre colours shall be stable during temperature cycling and not subject to fading or smearing onto each other or into the gel filling material. Colours shall not cause fibres to stick together.

3.1.1.4 All optical fibres shall be sufficiently free of surface imperfections and inclusions to meet the optical, mechanical, and environmental requirements of this specification. Optical fibre splices within individual lengths of cable shall not be permitted.

3.1.2 Cable Configuration

3.1.2.1 The cable shall contain no metallic elements, and must have a uniform, small, diameter. The cable must be of low mass. The optical element must be watertight.

3.1.2.2 The required number of loose buffered single mode fibres to be incorporated in the cable is specified in the Scope of Work and Schedule A/B. Each fibre shall be uniquely identified in an acceptable manner. Details shall be provided by the tenderer.

3.1.2.3 The buffer tube shall be filled with a non-hygroscopic, non-nutritive fungus, electrically non-conductive, homogenous gel. The gel shall be free from dirt and foreign matter. The gel shall be readily removable with conventional non-toxic solvents.

3.1.2.4 The fibres shall not adhere to the inside of the buffer tube(s).

3.1.2.5 Full details of cable construction as well as the measures taken to minimise hydrogen absorption in the fibres shall be provided.

3.1.2.6 The cable shall be provided with an anti-tracking jacket, which is to be smooth and of a constant thickness with no external markings to provide possible inception points for corona discharge or dry band arcing.

3.1.2.7 Cables shall be resistant to both ultra violet radiation from the sun as well as electric field strengths as would be experienced on HV transmission lines. (UV and tracking resistant.) Details are to be provided as to the measures taken to attain the necessary immunity to ensure a guaranteed design lifetime of at least 25 years.

3.1.2.8 Minimum bending radius for the cable shall be 100 mm and will be tested in accordance with clause 5.2.4.

3.1.2.9 The cable shall have sufficient crush resistance capability to withstand a load of 1000 N/10 cm when tested in accordance with IEC 60794-1-E3.

3.1.2.10 The cable shall be designed to withstand a certain degree of twisting without any damage to either the component parts of the cable or compromise to the optical transmission properties of the fibres. Testing as specified in clause 5.2.5 of this specification shall prove this capability.

3.1.2.11 The overall diameter of the externally attached cable must be less than the diameter of the wire to which the externally attached cable is to be attached. The maximum permissible diameter is 8.5mm for 48-fibre cable.




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3.1.2.12 The maximum mass of the cable shall not exceed 70 kg per km for a 48 core cable.

3.1.2.13 The cable sheath shall be sufficiently robust to withstand attack from birds (e.g. vultures) found in South Africa.

3.1.2.14 Under worst case conditions, i.e. a transverse wind loading (at 15°C) of 1050 Pa on the projected cross-section of the ground wire plus externally attached cable, the cable shall be designed such that the fibre strain does not exceed 0.2% for a ground wire span length of 400 m.

3.1.3 Mounting and Suspension Hardware Requirements

3.1.3.1 All mounting and suspension hardware and joint boxes required for the project, as detailed in the Scope of Work shall be supplied by the contractor, who shall be responsible to determine the total scope of supply and furnish details of the quantities to be provided.

Note: The Eskom line system contains sections of line with insulated earth-wire. The attached cable must be installed in such a way that the insulation rating of the line is not reduced and the integrity of the optical fibre cable is maintained for the full service life. The details of the necessary hardware required are to be provided. Explicit installation instructions are to be provided. These are to detail the techniques and hardware to be used in the following situations:

i. Transitions at a strain tower where the earth-wire is bonded to the tower.

ii. Transitions at a suspension tower where the earth-wire is bonded to the tower.

iii. Transitions at a strain tower where the earth-wire is isolated from the tower.

iv. Transitions at a suspension tower where the earth-wire is isolated from the tower.

v. When joint boxes are installed at a tower where the earth-wire is bonded.

vi. When joint boxes are installed at a tower where the earth-wire is isolated.

vii. Where the cable is to be installed on a phase conductor, requiring transition bushings at the end terminals and overhead splice boxes en-route.

3.1.3.2 The design and construction of all items of mounting and suspension hardware shall be such that no damage or deformation occurs to either the components of the cable or to the transmission properties of the optic fibres.

3.1.3.3 The supplier shall be fully responsible for the designs and satisfactory performance of the installation in service. Acceptance by Eskom does not relieve the supplier of responsibility for the adequacy of the design, dimensions and details.

3.1.3.4 No hardware or rigging shall require holes to be drilled in the tower structures; neither shall hardware damage the galvanising of the towers.

3.1.3.5 Full details of all suspension and mounting hardware shall be supplied, for acceptance, before the cable and hardware are delivered.

3.1.3.6 The following information is to be provided:

3.1.3.6.1 A list of specifications to which the hardware supplied has been designed

3.1.3.6.2 Results of all type testing performed

3.1.3.6.3 All information relating to vibration control

3.1.4 Installation Procedure

3.1.4.1 The externally attached cable shall be installed to the earth-wire or phase conductor of an overhead power line.

3.1.4.2 The externally attached cable shall be permanently and tightly fixed to the line so that relative movement between the fibre cable and earth-wire is limited.




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3.1.4.3 The weight of the installation equipment together with the cable drum loaded with the maximum installation length of the cable shall be less than 250 kg for HV and EHV Transmission Line applications. (The weight of personnel on the towers during installation shall be considered as additional). During installation, all structure loading, wire stresses and clearances as prescribed in SANS 10280:1 shall be maintained.

3.1.4.4 A pre-engineering line study is required on the earth wire/phase conductor to ensure the earth wire/phase conductor is not damaged and to minimise risk or earth wire failure during the installation process. The same study shall ensure that the addition of the wrap fibre does not increase the wind loading on the shield wire beyond the safe limits of the wire or supporting towers.

3.1.4.5 The wrapping pitch must be uniform and the cable applied with a constant tension.

3.1.4.6 A mechanism must exist to unwrap and re-tension the cable if repairs are required. Details of the mechanism must be provided. Such a mechanism/machine shall be made available permanently in South Africa.

3.1.4.7 During installation drop zones should be clearly indicated by use of orange cones and/or warning tape. Access to the drop zone to be controlled by the contractor site supervisor during installation.

3.1.5 Environmental

3.1.5.1 The performance of the fibre optic cables shall not be degraded under the following ambient conditions:

a) Temperature : -10° to 50°C in the shade

b) Altitude: 0 to 2500 metres (ASL)

c) Relative Humidity : 100%

d) Barometric Pressure: 76 - 104 kPa

3.2 Tests

3.2.1 Optical

3.2.1.1 During manufacture each G.652 fibre shall be tested at both 1310 nm and 1550 nm for attenuation. Refractive index and dispersion characteristics of the fibre shall be checked on a random sampling basis to provide a regular check of the manufacturing process. The results are to be supplied to Eskom. The PMD values are to be provided. PMDQ shall be measured as specified in IEC 60794-2 Annex A, method1, based on a probability that the desired value is not exceeded with a probability of less than 0.0001 for a numerical concatenation of 20 cables.

3.2.1.2 During manufacture or subsequent works testing, the entire length of each fibre shall be subject to a proof test of at least 1% elongation.

3.2.1.3 Each fibre shall be measured for continuity and length once the cable has been placed on the drum prior to delivery. Eskom may require an inspector to be present when these final measurements are performed. Eskom's attendance shall not relieve the supplier of his responsibility for the satisfactory performance of the cable during subsequent testing at site and thereafter to the end of the warranty period.

3.2.1.4 Macrobending performance shall be tested by a method specified in IEC 60793-1-47. During testing, the additional attenuation shall be less than the value specified in the schedule A/B. For G.652 fibre, 100 turns shall be placed on a 65 mm diameter mandrel

3.2.2 Mechanical/Electrical

The mechanical and electrical tests called for in this specification are considered as type tests. Eskom is prepared to review the results of similar tests which the supplier may have performed in the past and possibly waive the requirements for one or more of the tests specified in this document.




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3.2.2.1 Tensile Strength

3.2.2.1.1 The cable shall be tested according to IEC standard 60794-1-E1. The load (specified in schedule A/B items) shall be applied for 10 minutes and the strain of the fibre monitored. The maximum cable break strength must be at least twice the maximum cable load during installation.

3.2.2.1.2 The fibre must not be damaged when the cable is tested up to 50% of the maximum break strength of the cable.

3.2.2.2 Crush Resistance

The fibres and component parts of the cable shall not suffer permanent damage when subjected to a compression load of 1000 N/10cm. The load shall be applied for 1 minute and no cable damage or attenuation change shall take place after the test has been performed. The test is to be performed as described in IEC Standard 60794-1-E3.

3.2.2.3 Impact Resistance

The cable shall be tested as per IEC Standard 60794-1-E4. The anvil radius is to be 300 mm. The cable is to withstand three impacts of 1 Nm without any change to the optical transmission performance of any fibre.

3.2.2.4 Cable Bending

The fibre and component parts of the cable must not suffer permanent damage when the complete cable is repeatedly wrapped and unwrapped four complete turns for ten complete cycles at room temperature, around a mandrel of 100 mm diameter.

3.2.2.5 Cable Torsion

The fibre and component parts of the cable must not suffer permanent damage when a 1 m length of cable is subjected to a full clockwise twist, immediately followed by two anti-clockwise twists, tested as per IEC Standard 60794-1-E7.

3.2.2.6 Temperature Cycling

The cable shall be subjected to a minimum temperature of -20°C and a maximum temperature of +70°C. The test shall be performed in accordance with IEC 60794-1-F1. To simulate the behaviour under operating conditions, the cable shall be wound on a steel drum during the test with a certain tension, so that the cable elongation is between 0.1% and 0.2%. The change in fibre attenuation shall not be greater than the uncertainty of measurement.

3.2.2.7 Simulation of Short Circuit Currents

The externally attached cable shall be able to withstand a maximum short time temperature of the earth-wire of 300°C. To simulate the behaviour of the externally attached cable under short circuit current conditions, a sample of the cable shall be installed to an earth-wire so that it is fixed as under operating conditions. This sample shall be subjected to an electrical current for a duration of 1 second. The magnitude of the electrical current shall be chosen so that the final temperature of the earth-wire is 300°C. The temperature of the earth-wire shall be monitored continuously during the test. The change in fibre attenuation shall not be greater than the uncertainty of measurement. After the test, the cable sheath shall have no changes in form or mechanical characteristics that significantly deteriorate the cable characteristics.

3.2.2.8 Lightning impact Simulation

3.2.2.8.1 To simulate the behaviour of the externally attached cable in case of a lightning impact, a sample of the cable shall be installed to an earth-wire so that it is fixed as under operating conditions. This sample shall be subjected to a simulated lightning Impact:




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a) Duration: 500 ms ± 50 ms

b) Charge transfer : 200 As ± 20 As

c) Distance between electrode and earth-wire: ± 5 cm

d) Minimum sample length: 4 m

3.2.2.8.2 The change in fibre attenuation shall not be greater than the uncertainty of measurement. The cable shall remain fixed at the earth-wire. After the test the cable sheath shall have no changes in form, colour or mechanical characteristics that significantly deteriorate the cable transmission characteristics.

3.2.2.9 Aeolian Vibration Simulation

3.2.2.9.1 The cable shall be subjected to aeolian vibration testing. A sample of the cable shall be installed to an earth-wire so that it is fixed as under operating conditions. The vibration test shall be performed using the following parameters:

a) Minimum sample length: 30m

b) Tensile load of earth-wire: 20% of rated tensile strength

c) Minimum number of cycles: 10x106

d) Vibration frequency: 40Hz ± 10Hz

e) Bending angle: ± 10 degrees

3.2.2.9.2 The change in fibre attenuation shall not be greater than the uncertainty of measurement. The cable shall remain fixed at the earthwire. There shall be no cracking of the cable jacket, or other cable components at the completion of the testing.

3.2.2.10 Water Penetration

The cable, when tested between the core and inner sheath, shall fulfil the requirements of the water penetration test detailed in IEC Recommendation 60794-1-F5. (1 m, 24 h, optical element only, no water drip.)

3.2.2.11 UV and Solar Radiation Resistance

3.2.2.11.1 Where the cable jacket has carbon black as a UV inhibitor, it shall be tested in accordance with ASTM D-3349 or equivalent national standard and the cable shall be shown to have a minimum absorption coefficient of 320 milli (absorbance/metre).

3.2.2.11.2 Where other cable UV blocking systems are employed, the cable shall meet the equivalent UV performance of carbon black at 320 milli (absorbance/meter) or meet the performance requirements stated in IEC 60068-1 testing.

3.2.2.11.3 For Solar Radiation testing, IEC 60068-2-5 Sa, Method C, shall be applied in line with the requirements specified in Clause 5.2.1.8 of IEEE 1594.

3.2.2.11.4 After testing the cable samples are to undergo a tensile test to measure tensile strength and elongation at break. A minimum of 60% of the tensile strength shall be retained, and there should be no surface crazing or discolouration.

3.2.2.12 Electrical withstand capability of the she ath (Tracking test)

The cable shall be tested as per the requirements of clause 9.3.3 of IEC 62217, at a minimum level of 20 kV/mm. The salt fog conditions shall be as specified in Clause 9.3.3.1.1.3, with a test duration of a minimum of 1000 hours. The outer sheath shall be inspected after the test period and there shall not be any evidence of tracking or erosion of the sheath if the cable is to be deemed compliant. In addition there shall be no more than 2 flashovers during the duration of the test.




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3.3 Marking, labelling and packaging

All drums of cable shall be supplied with an indelible label providing the following information:

a) Manufacturer

b) Type of cable

c) Length of cable

d) Drum identifier (number as well as details of between which towers it is to be installed)

e) Type of fibre

f) Number of fibres

3.4 Jointing and Commissioning

3.4.1 Jointing

a) Jointing of the externally attached cable shall be done at ground level, where after the joint shall be pulled up to either above the anti-climbing guard (where fitted), or to the same height to which the mounting hardware is clamped to the tower, where the joint box will be mounted.

b) The extra length of externally attached cable required for jointing at ground level must be included in the total length required.

c) All joints shall be of the fusion type.

3.4.2 All necessary line outages for installation and possible crossing of other power lines, major roads, electrified railway lines, etc. will be co-ordinated between the supplier/contractor and Eskom's appointed Project Leader.

3.4.3 Commissioning shall be done in close co-operation with, and to the full satisfaction of, Eskom's relevant telecommunications personnel.

3.4.4 Total end-to-end losses shall be as specified in the Scope of Works.

3.4.5 Testing shall be as per Eskom Specification 240-70732888.

3.5 Training

3.5.1 Eskom reserves the right to have its staff actively participate in the fibre section link tests with the objective of their gaining intimate knowledge of the testing procedures.

3.5.2 Eskom staff will observe the cable installation, as well as the jointing and termination processes as a training exercise.

3.6 Documentation

3.6.1 The Contractor shall supply, on completion of the work, full details of the system provided, including all certified test results and as specified in this document, joint locations and losses as per TPC41-5, as well as diagrams of the cable layout and documentation on the mechanical components, e.g. mounting hardware.

3.6.2 All documentation called for in clause 3.6.1 shall be provided in both electronic format as well as in hard-covered ring files which comply with the following requirements:

d) A4 size

e) Of a construction which can open flat at any page

f) Any drawings and descriptions included shall conform to the A4 series (295mm x 220mm). Larger drawings shall be folded in a single panel, along the 220mm axis of the standard A4 size. Drawings which must be folded in two directions are not acceptable.

g) Different sections of the documentation shall be separated by means of thumb-tag separators.




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3.6.3 Three copies of the documentation called for in clauses 3.6.1 and 3.6.2 shall be delivered to the appointed project leader.

3.6.4 All documentation to be in English.

3.6.5 All drawings supplied shall contain sufficient information to enable structural strength calculations to be made for the items of hardware.

3.6.6 All drawings shall clearly indicate all critical tolerances on items of hardware.

3.6.7 All drawings shall clearly indicate material grade and heat treatment required for individual items.

3.6.8 Any revisions to drawings of items of hardware being manufactured or supplied to Eskom shall clearly indicate the revision number and date, and shall be submitted to Eskom for acceptance.

4. Authorization

This document has been seen and accepted by:

Name and surname Designation

Richard McCurrach Senior Manager – PTM&C

Marius van Rensburg Senior Manager – TX

Sikelela Mkhabela Senior Manager - DX

Prudence Madiba Senior Manager – GX

Alison Maseko Senior Manager - Eskom Telecommunications (Acting)

Paul Grobler Chief Engineer - TX

Sean Martiz Senior Manager - GIT

5. Revisions

Date Rev Compiler Remarks

June 2016 2 V Naidu Change of wind loading from 1040Pa to 1050Pa.

March 2015 1 GP Smith Formatted to S C O T-New Standard Template_20 August 2013. Correction of typing errors

Dec 2011 0 V Naidu Initial Issue

6. Development team

The following people were involved in the development of this document:

• Rob Stephens

• Bob Branfield

• Cornelius Naidoo

• David C Smith (Bervonne Consulting)

• Gavin Strelec

• Reginald Morgan

• Rodney Westwood

• Steven Papadopoulos




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• Tejin Gosai

• Vanessa Naidu

• Ziyaad Gydien

7. Acknowledgements

Not applicable.




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Annex A – Contractual - Schedule A/B - Technical Pa rticulars

Enquiry No: Tenderer’s name: ……………………………………….

Tenderer’s Signature: ……………………………………………………. Date:

A.1 Optical Fibres - G.652

Item No.

Sub-clause of 240-42990189 Description

Schedule A Particulars of Eskom's

Requirements

Schedule B Guaranteed Technical Particulars

Offered

No. of Fibres As per Scope of Work

Type of Fibres As per G.652D

Mode field diameter:

at 1310 nm

at 1550 nm

9.2 ± 0.4 µm

10.50 ± 1.0 µm

Cladding diameter 125 µm ± 1.0µm

Mode field concentricity error ≤ 0.5 µm

Cladding non-circularity ≤ 1.0 %

Cladding Configuration (depressed / matched / other) Specify

Attenuation Coefficient

at 1290-1340 nm

at 1550 nm

<0.35 dB/km

<0.22 dB/km

Chromatic dispersion coefficient

at 1310 nm

at 1550 nm

< 3.5 ps/(nm.km)

<18 ps/(nm.km)

Proof Test ≥1%

Polarisation Mode Dispersion (PMD) ≤ 0.2ps/√ km

Fibre Curl (ROC) ≥ 4.0 m

3.2.1.4 Macrobending performance

Additional attenuation at 1550 nm

< 0.05 dB






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A.2 Cable

Item No.


Schedule A Particulars of

Eskom's Requirements


Offered

Cable Diameter (mm) Specify

Weight of Cable (kg/km) (for 48 core cable) < 70

Maximum Installation Tension (N)

Specify

Ultimate Tensile Strength (N) Specify

3.1.2.14 Maximum Working Load (where fibre strain does not exceed 0.2% in the fibres) (kN)

Specify

Maximum Continuous Load

(fibre under no strain) (kN) Specify

Minimum Bending Radius (mm) ≤ 100 mm

3.2.2.2 Crush Resistance ≥ 1000 N/10 cm

3.2.2.3 Impact Resistance ≥ 3 x 1 Nm

3.2.2.4 Cable Bending Yes

3.2.2.5 Cable Twist Yes

3.2.2.6 Temperature Cycling Yes

3.2.2.7 Simulation of short circuit Yes

3.2.2.8 Lightning impact simulation Yes

3.2.2.9 Aeolian Vibration Yes

3.2.2.10 Water penetration Yes

3.2.2.11 UV and Solar Radiation Resistance

Yes

3.2.2.12 Tracking withstand Yes

Are the certified results of type tests on the cable, and all associated installation hardware, available?

Yes/No If not, by when will they have been completed?






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A.3 General

Item No.


Schedule A Particulars of

Eskom's Requirements


Offered

3.1.4.3 Mass of installation equipment, together with cable drum loaded with maximum installation length of 48 fibre cable

≤ 250 kg (for HV and EHV lines applications) and according to SANS 10280:1

A.4 Guide to Statement of Compliance

A.4.1 Guide to tenderer on completing the Complianc e Schedule

A.4.2 The specification contains A and B schedules and a clause by clause statement of compliance. The attached compliance schedule shall be filled in together with the relevant technical schedule.

A.4.3 Column 1: The relevant sub-clause of 240-42990189

A.4.4 Column 2: Statement of full compliance. (Yes or No). (If not filled in it will be assumed that the tender does not comply with the specific clause)

A.4.5 Column 3: Stipulate deviations and any other relevant information as required per the specification

Table A.1: Example Statement of Compliance

Caption1 2 3

Clause Fully Comply Comments/Deviations

4.1 Yes -

No xxxxxxxx

No yyyyyyy

4.2 Yes ddddddd

4.3 Yes -

The material and equipment supplied on this contract complies in all respects with the requirements of the specification and Schedule A/B.




Revision: 2

Page: 17 of 21




A.5 Statement of Compliance

Enquiry No: Tenderer’s name: ………………………………………

Tenderer’s Signature: ……………………………………………… Date: ……… ……………………………

Compliance Schedule

1 2 3


1

2.1.1

2.1.2

2.2.1

2.2.2

2.3.1

2.3.2

2.4

2.5

2.6

2.7

3.1.1.1

3.1.1.2

3.1.1.3

3.1.1.4

3.1.2.1

3.1.2.2

3.1.2.3

3.2.2.2

3.1.2.5

3.1.2.6

3.1.2.7




Revision: 2

Page: 18 of 21






Compliance Schedule

1 2 3


3.1.2.8

3.1.2.9

3.2.2.8

3.2.2.9

3.1.2.12

3.1.2.13

3.1.2.14

3.1.3.1

3.1.3.2

3.1.3.3

3.1.3.4

3.1.3.5

3.1.3.6

3.1.4.1

3.1.4.2

3.1.4.3

3.1.4.4

3.1.4.5

3.1.4.6

3.1.4.7

3.1.5.1

3.2.1.1

3.2.1.2




Revision: 2

Page: 19 of 21






Compliance Schedule

1 2 3


3.2.1.3

3.2.1.4

3.2.2

3.2.2.1.1

3.2.2.1.2

3.2.2.2

3.2.2.3

3.2.2.4

3.2.2.5

3.2.2.6

3.2.2.7

3.2.2.8.1

3.2.2.10

3.2.2.11.1

3.2.2.11.2

3.2.2.11.3

3.2.2.11.4

3.2.2.12

3.3

3.4.1

3.4.2

3.4.3

3.4.4




Revision: 2

Page: 20 of 21






Compliance Schedule

1 2 3


3.4.5

3.5.1

3.5.2

3.6.1

3.6.2

3.6.3

3.6.4

3.6.5

3.6.6

3.6.7

3.6.8




Revision: 2

Page: 21 of 21




A.6 Statement of Non-Compliance

The equipment supplied on this contract complies in all respects with the requirements of the specification and Schedule A/B with the exception of the following points:

Enquiry No: Tenderer’s name: …………………………………………….

Tenderer’s Signature: ……………………………………………………. Date: … …………………………………

Any deviations offered to this specification shall be listed below with reasons for deviation. In addition, evidence shall be provided that the proposed deviation will at least be more cost-effective than that specified

by Eskom.

Item Clause Proposed Deviation

Documents

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