Request for Amended Advice Agency Response_Energex_Council CDA_01-04-2020

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                          TABLE OF CONTENTS


1.0   INTRODUCTION …….....……………….…………………………….................... 1
      1.1  Property description
      1.2  Proposed Subdivision
      1.3  Purpose of study
      1.4  Methodology for assessing magnetic fields


2.0   THE TRANSMISSION LINES…………………………….………….................. 3
      2.1   Transmission line alignment and route
      2.2   Particulars in relation to Hollett Road property
      2.3   Feeder loading analysis
      2.4   Scenarios for future development


3.0   BACKGROUND ON MAGNETIC FIELDS ………………………..………..….… 6
      3.1 ARPANSA and ENA
      3.2 Australian Guidelines
      3.3 Prudent avoidance
      3.4 Electronic devices


4.0   MAGNETIC AND ELECTRIC FIELD CALCULATIONS……………..……….… 8
      4.1 General Parameters
      4.2 Average conductor height and geometry
      4.3 Magnetic and Electric field calculations


5.0   METHODS FOR REDUCING MAGNETIC FIELD LEVELS………..……….…..13
      5.1  Background
      5.2  Increasing distance from source
      5.3  Conductor geometry and phase configuration
      5.4  Conductor compactness
      5.5  Load current reduction and balancing
      5.6  Undergrounding


6.0   DISCUSSION….……...………………......……...…………………………………. 14
      6.1  Summary of magnetic field calculations
      6.2  Assessment of magnetic field levels
      6.3  Application of prudent avoidance principles
      6.4  General electrical safety considerations


7.0   CONCLUSIONS.……...………………......……...…………………………………. 16
      7.1  Review of key criteria
      7.2  Assumptions and limitations


APPENDIX 1    Subdivision plan of development…………………………………….. 17
APPENDIX 2    F790/F7298 structure site survey drawing……..………………….... 18
APPENDIX 3    F790/F7298 plan and profile drawing ……….…..………………….. 19
APPENDIX 4    ENERGEX IS(C)E intermediate tower geometry……….………….. 20