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Asset Management Plan for the Period 1 April 2018

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Asset Management Plan for the Period 1 April 2018 Asset Management Plan 1 April 2018 to 31 March 2028 Contents SUMMARY ............................................................................................................ 7 Consumer responsiveness ................................................................................................... 55 Cost performance ................................................................................................................. 56 Highlights of this AMP ............................................................................................................. 8 Conductor Renewal ................................................................................................................ 8 Network continuance ........................................................................................................... 59 Utilisation and losses ............................................................................................................ 63 Duty of care ............................................................................................................................. 8 Consumer expectations .......................................................................................................... 8 Objective commitments ....................................................................................................... 64 Business continuance ........................................................................................................... 64 Uneconomic reticulation issues ............................................................................................. 9 Resilience to extreme events ................................................................................................. 9 Performance summary and response ................................................................................. 65 Load growth and distributed generation ............................................................................... 9 ASSET MANAGEMENT STRATEGY ............................................................... 66 Disclosure of this AMP .......................................................................................................... 10 Overarching asset strategy ................................................................................................... 66 INTRODUCTION .......................................................................................... 11 Systems and information management .............................................................................. 68 Purpose of this AMP ............................................................................................................. 11 Compliance ........................................................................................................................... 77 Risk management ................................................................................................................. 77 Basis of AMP .......................................................................................................................... 11 Key stakeholders and objectives .......................................................................................... 12 Lifecycle management ......................................................................................................... 86 Vegetation management ..................................................................................................... 92 Link to other documents ...................................................................................................... 13 Surveillance ........................................................................................................................... 94 Period covered ...................................................................................................................... 13 Network development strategy........................................................................................... 97 Structure of this AMP ............................................................................................................ 14 Non-network solutions ....................................................................................................... 104 NETWORK OVERVIEW ................................................................................ 15 Key assumptions ................................................................................................................. 108 Region and context ............................................................................................................... 15 Asset management improvement ..................................................................................... 111 Network and demand ........................................................................................................... 28 NETWORK DEVELOPMENT ........................................................................ 113 Supply within Marlborough .................................................................................................. 30 Overview ............................................................................................................................. 113 STAKEHOLDER INTERESTS AND OBJECTIVES ALIGNMENT ........................... 39 Growth/demand projections ............................................................................................. 113 Stakeholder interests ............................................................................................................ 39 Area plans ........................................................................................................................... 115 Stakeholder engagement ..................................................................................................... 41 Grid Exit Point and embedded generation ........................................................................ 124 Business and planning response .......................................................................................... 43 Major projects..................................................................................................................... 125 NETWORK PERFORMANCE AND SERVICE LEVELS ........................................ 49 CUSTOMER WORKS .................................................................................. 131 Quality of supply ................................................................................................................... 50 New connections ................................................................................................................ 131 Marlborough Lines Limited Asset Management Plan - 1 April 2018 to 31 March 2028 2 Asset relocations ................................................................................................................. 132 Opex .................................................................................................................................... 202 FLEET MANAGEMENT ............................................................................... 134 Capex/opex trade-off and overlapping works .................................................................. 203 Capacity to deliver .............................................................................................................. 203 Fleet management overview ............................................................................................. 134 Overhead structures (poles) ............................................................................................... 134 APPENDICES ............................................................................................. 204 Overhead conductor ........................................................................................................... 141 Glossary ............................................................................................................................... 204 Cables ................................................................................................................................... 147 Regulatory schedules ......................................................................................................... 207 Zone substations ................................................................................................................. 153 Regulatory requirements look-up ..................................................................................... 208 Distribution transformers ................................................................................................... 161 Single line diagram of 33kV Network ................................................................................ 215 Distribution switchgear ....................................................................................................... 169 SCADA coverage map ......................................................................................................... 216 Earthing Systems ................................................................................................................. 175 Business organisation and role responsibilities ................................................................ 216 Mobile generators............................................................................................................... 178 Performance analysis of reliability and cost .....................................................................
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