SECTION VI TECHNICAL SPECIFICATIONS AND …

1 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 1 of 137 SECTION VI TECHNICAL SPECIFICATIONS AND drawings FOR OVERHEAD LINES Single Circuit 132kV OHL Ishiara-Kieni, Mwingi-Kitui-Wote-Sultan Hamud KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 2 of 137 TECHNICAL specification FOR OVERHEAD LINE SYSTEMS CONTENTS Page No. 1. GENERAL 9 Definitions 9 Project Description 9 Nature of Work 9 Extent of Work 10 Definite Work 10 Terminal points 10 Details of transmission line routes 11 Climate 11 Transport 13 Safety of personnel 14 Compliance with regulations 14 General particulars and guarantees 14 Compliance with standard SPECIFICATIONS 15 Variations from Conditions of Contract 15 Subcontracted plant, materials and labour 15 Access to manufacturers' works 15 Planning.

2 Progress reports and project progress meetings 15 Quality assurance 17 Quality assurance requirements 17 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 3 of 137 Quality assurance arrangements quality plan 18 Monitoring by the Engineer 18 Contractor quality audits 19 Control of subcontractors 19 Inspection and tests 19 Construction/installation phase 22 Non-conformances 22 Records 23 Method statements 23 Design and standardization 23 Quality of material 23 Language, weights and measures 24 Testing and inspection 24 Erection, supervision and checking of work on site 25 drawings .

3 Models and samples 25 Responsibility of Contractor 27 Additional services of Contractor's staff 28 Contractor s employees 28 Alcoholic Liquor or Drugs 28 Packing and shipment 28 Accommodation and site storage 29 Office accommodation for use of the Engineer 30 Office Accommodation Services 32 Living accommodation for use by the Engineer 32 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 4 of 137 Living Accommodation specification 33 Living accommodation Services 36 Engineer's transport and communications equipment 37 2. LINE CONDUCTOR 39 General 39 Joints 40 Vibration dampers, spacers and spacer-dampers 41 Armour rods 43 3.

4 EARTH CONDUCTORS 44 General 44 Joints 47 Vibration dampers 47 Armour rods 48 Optical joints and joint boxes 48 4. INSULATORS AND FITTINGS 50 Insulator sets and earth conductor sets 50 Types of insulator 50 Grading rings & Corona devices 51 Electrical design 51 Mechanical design 51 Marking 52 Clamps and fittings 52 5. STEEL TOWER DESIGN 56 General 56 Types of tower 56 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 5 of 137 Use of standard towers 57 Final sags and tensions 58 Span lengths 58 Conductor spacings and clearances 59 Applied loads, normal loading conditions 61 Applied loads, unbalanced loading conditions 62 Applied loads construction and maintenance loading conditions 63 Tower design 63 Foundation reactions 64 Anti-climbing devices, step bolts, anti-theft bolts and bird guards 65 Notice plates 65 Aircraft warning markers.

5 Obstruction lights and tower painting 66 6. FOUNDATION DESIGN 69 General 69 Foundation types 70 7. STEELWORK DETAILING AND MANUFACTURE 75 Detailing and fabrication 75 Material 76 Bolts and nuts 76 Workmanship 77 Erection marks 77 8. GALVANIZING 78 General 78 9. SURVEY AND SETTING OUT 79 General 79 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 6 of 137 Obtaining right of way and compensation 79 Access 79 Access tracks 81 Survey 81 Profiles 84 Line schedule 86 Route map 86 Sag templates 86 10. CIVIL WORKS 88 Sub-surface investigation and foundation class selection 88 Route clearance 90 Installation of foundations 91 11.

6 ERECTION 98 Storage and erection of steelwork 98 Earthing 99 Erection of insulators 101 Crossing of public services 102 Erection sags and tensions 102 Erection of line and Aluminium Steel Clad earth conductors 103 Erection of optical fibre (OPGW) earth conductors 105 Work at ends of the line 106 Final inspection 106 12. SPECIAL TOOLS AND EQUIPMENT 108 13. SPARE PARTS 109 14. REMEASURED WORK 110 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 7 of 137 Measurements of work 110 Towers and foundations 110 Tests 111 15. TESTS 113 General 113 Summary of tests 113 Details of tests 114 Line and earth conductors 114 OPGW earth conductors 114 Tension and suspension clamps and joints 115 Insulator units, insulator sets, insulator fittings and conductor mechanical protective devices 117 Insulator Units 117 Insulator sets 117 Towers and metal fittings for towers 118 Material Sample Tests 118 Assembly test 118 Type test 118 Zinc coatings 119 Tests on foundations 119 Tests on cement and concrete 121 Tower footing resistances 121 Tests on conductor joints and clamps 121 Line insulation and conductivity 122 16.

7 drawings , DOCUMENTATION AND SAMPLES 123 KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 8 of 137 drawings and documentation 123 General 123 Submittals to be attached to the Bid 123 Submittals during contract period 124 Final records 127 Installation and maintenance instructions 128 SAMPLES 129 General 129 17. TRAINING 130 APPENDICES: Appendix A - Loading conditions Appendix B Applied loads: Simultaneous unbalanced loading conditions Appendix C Applied loads: Construction and maintenance loading conditions Appendix D Foundations design particulars Appendix E Bid drawings KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 9 of 137 1.

8 GENERAL Definitions In addition to the terms referred to in Volume 1, Part 3, the General Conditions of Contract, the following, where used in this specification , shall have the meanings listed below:- The word specified shall mean specified herein or in the TECHNICAL Schedules. The word Engineer shall mean the Project Manager. Project Description The Project, designated as the Kenya Power Transmission System Improvement Project (Transmission Component) for the purpose of reinforcing and expanding existing 33kV and 11kV electricity distribution networks through the expansion of its existing 132kV transmission network with new 132kV line circuits, new 132/33kV substations and/or expansion of existing 132/33kV substations.

9 The Project comprises three (3) contracts with the facilities outlined in general as follows, of which only the Transmission components of Lot 1 are specified in these Employer s Requirements. 1. Lot 1 Construction of Lessos Kabarnet, Nanyuki Nyahururu, Olkaria Narok, Sotik Bomet 132kV Transmission Lines with a total length of 245km. 2. Lot 2 Construction of Ishiara Kieni, Mwingi Kitui Wote Sultan Hamud 132kV Transmission Lines with a total Length of 188km. 3. Lot 3 Eight new 132/33kV Substations at Kieni, Kabarnet, Nyahururu, Narok, bomet, Kitui, Wote and Sultan Hamud and six 132kV Outgoing bays at Ishiara, Lessos, Nanyuki, Olkaria, sotik and Mwingi All the three above Packages shall be executed on a Design, Supply, Erection and Commissioning contractual basis.

10 Nature of Work The contract outlines the construction of 188km of 132kV single circuit overhead transmission line connecting the proposed substation at Kieni, Kitui, Wote and Sultan Hamud. These TECHNICAL SPECIFICATIONS covers the scope of works for the following 132 kV overhead transmission lines 1. 35 km Ishiara- Kieni KPTSIP Lot 2 KETRACO/PT/0003/2012 SECTION VI TECHNICAL SPECIFICATIONS and drawings for Overhead Lines Page 10 of 137 2. 153 km Mwingi-Kitui-Wote-Sultan Hamud Extent of Work The contract Works to be supplied shall include all work incidental thereto whether specified in detail or not and shall be carried out by the Contractor in accordance with the specification and Conditions of Contract and shall comprise the following.