PROJECT BRIEF Transmission and Distribution for GICUMBI And

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PROJECT BRIEF Transmission and Distribution for GICUMBI And REPUBLIC OF RWANDA Ministry of Infrastructure ENERGY WATER AND SANITATION AUTHORITY (EWSA) Electricity Access Rollout Programme (EARP) Head Office: Avenue de l’ Ihema, P.O.Box 537, Kigali-Rwanda Tel: +(250)252573666 Fax: +(250)(0)252573802 E-mail: [email protected] Website: www.ewsa.rw PROJECT BRIEF FOR THE CONSTRUCTION OF TRANSMISSION AND DISTRIBUTION LINES FOR GICUMBI AND GIKOMERO December 2011 1 LIST OF ACRONYMS ............................................................................................................ 5 0. BACKGROUND .................................................................................................................. 6 I. DESCRIPTION OF THE PROJECT ................................................................................. 8 I.1. INTRODUCTION ........................................................................................................................... 8 I.2. OBJECTIVES OF THE PROJECT ............................................................................................... 8 I.3. PROJECT ACTIVITIES ................................................................................................................ 9 I.4. TECHNICAL DESCRIPTION ......................................................................................................10 Description of Works ..................................................................................................... 10 Line Profiling ..................................................................................................................... 11 Scope ...............................................................................................................................................12 Environmental Data ........................................................................................................................12 Safety Precautions ..........................................................................................................................13 Quality Assurance ...........................................................................................................................13 Packing and Shipping .....................................................................................................................14 Packing ...................................................................................................................................................... 14 Shipping or Inland Transportation .......................................................................................................... 14 Hazardous Substances ...................................................................................................................15 STANDARDS AND SPECIFICATIONS ........................................................................... 15 LOW VOLTAGE AERIAL BUNDLE CABLES (600/1000V) ..................................... 15 CABLE DESIGN ...............................................................................................................................15 Conducting cores ...................................................................................................................................... 15 Insulating sheath ....................................................................................................................................... 16 SPECIFICATIONS ............................................................................................................................16 600/1000V GENERAL PURPOSE LV CABLES ........................................................... 16 Conductors ......................................................................................................................................16 Insulation .........................................................................................................................................16 Armouring ........................................................................................................................................16 Oversheath ......................................................................................................................................17 Core Identification ...........................................................................................................................17 CABLE OVERSHEATH ....................................................................................................................17 LV SERVICE DROP CABLES ............................................................................................ 17 CABLE DESIGN ...............................................................................................................................17 2 Characteristic requirements .................................................................................................................... 17 CONDUCTOR CHARACTERISTICS ................................................................................................18 15KV DISTRIBUTION TRANSFORMERS .................................................................... 18 STANDARDS ....................................................................................................................................18 30KV DISTRIBUTION TRANSFORMERS .................................................................... 19 STANDARDS ....................................................................................................................................19 TRANSFORMER LV DISTRIBUTION BOX .................................................................. 19 LV DB ...............................................................................................................................................19 15KV SURGE ARRESTORS.............................................................................................. 20 STANDARDS ....................................................................................................................................20 CHARACTERISTICS OF NETWORK ..............................................................................................20 30KV SURGE ARRESTORS.............................................................................................. 20 STANDARDS ....................................................................................................................................20 30KV INSULATED FUSE CUTOUTS .............................................................................. 21 STANDARDS : .................................................................................................................................21 WOOD POLES ..................................................................................................................... 21 NORMATIVE REFERENCES ...........................................................................................................21 PRESERVATIVE TREATMENT .......................................................................................................22 Wood specie and preservative treatment: ............................................................................................ 22 CONCRETE POLES ............................................................................................................ 22 NORMATIVE REFERENCES ...........................................................................................................23 STEEL POLES ...................................................................................................................... 23 STANDARDS: ..................................................................................................................................23 SETTING OUT AND ERECTION ..................................................................................... 24 General .............................................................................................................................................24 Planting Depth .................................................................................................................................25 Backfill and Compaction ................................................................................................................25 Pegging of Structure Positions ......................................................................................................25 Site Preparation ...............................................................................................................................26 Protection of Natural Vegetation ...................................................................................................26 CONSTRUCTION ................................................................................................................ 27 3 II. DESCRIPTION OF THE ENVIRONMENT ................................................................ 29 II.1. DESCRIPTION OF THE PHYSICAL ENVIRONMENT: METEOROLOGY, HYDROGRAPHY, GEOLOGY, RELIEF AND BIODIVERSITY ......................................................................................29 II.2. DESCRIPTION OF THE SOCIO-ECONOMIC ENVIRONMENT ................................................37 III. POLICY, LEGAL AND ADMINISTRATIVE FRAMEWORK ................................. 48 III.1. POLICIES RELEVANT TO THE PROJECT .............................................................................48 III.2. ORGANIC LAW ON ENVIRONMENTAL PROTECTION AND MANAGEMENT .....................56 III.3. ENVIRONMENTAL CLEARANCE PROCEDURES
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