High Voltage Live Work Manual Prepared by Field Practices Safety and Health Corporate Services and Company Secretary CS# 2369013 HORIZON POWER DOCUMENT CONTROL Name: Mark Van Vuuren Document Owner Position: Field Practices Coordinator (May also be the Process Owner) Date: May 2014 Name: Mark Van Vuuren Approved By * Position: Field Practices Coordinator Date: May 2014 Authorisation ** Name: Lance Roberts Process Owner is hereby vested Position: Manager Safety and Health with authority and responsibility Date: May 2017 to manage the process end to end. Date Created/Last Updated May 2017 Review Frequency *** Every 3 years Next Review Date *** May 2020 * Must be the Process Owner and is the person assigned authority and responsibility for managing the whole process, end-to- end, which may extend across more than one division and/or functions, in order to deliver agreed business results . ** This person will have the power to grant the process owner the authority and responsibility to manage the process from end to end. *** Frequency period is dependent upon circumstances– maximum is 5 years from last issue, review, or revision whichever is the latest. If left blank, the default will be 1 year unless otherwise specified. STAKEHOLDERS NOTIFICATION LIST The following positions must be consulted if an update or The following positions must be notified of any authorised review is required: change: Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-ii Purposely Blank Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-iii Important Notice to Users The High Voltage Live Work Manual has been developed for use byH orizon Power workers’ and Service Providers engaged to perform High Voltage (HV) Live works on Horizon Power Electrical Networks. The manual is issued as a controlled document by Horizon Power to Horizon Powe r employees’ and Service Providers on the condition that it will only be used whilst undertaking HV Live works on Horizon Power electricity distribution network. HV Live work will only be performed by individuals who are appropriately trained, authorised and qualified in accordance with accepted standards within Horizon Power. This Manual is not intended, and should not in any way be relied upon, as a substitute for such training. Copyright 2014 Copyright is owned by Horizon Power. Horizon Power (CAN 57 955 011 697). All rights reserved. No part of this work may be reproduced or copied in any form or by any means (graphic, electronic, taping or information retrieval system) without the written permission of the copyright owner. Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-iv Purposely blank Document Title: H igh Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-5 Table of Contents 1. Scope ....................................................................................................................... 9 2. Definitions .............................................................................................................. 11 3. Concepts ................................................................................................................ 16 3.1. Glove & Barrier Method .................................................................................... 16 3.2. Stick Method .................................................................................................... 16 3.3. Combination Glove & Barrier and Stick Methods ............................................. 17 3.4. Combining of G&B work procedures ................................................................ 17 4. Safety Rules ........................................................................................................... 19 4.1. Safety Observer ............................................................................................... 19 4.2. Safe Approach Distances ................................................................................. 20 4.2.1 Safe Approach Distances for the HV Live Workers .......................................... 20 4.2.2 Safe Approach Distances for Mobile Plant ....................................................... 20 4.3. Protective Clothing ........................................................................................... 22 4.4. Incident Reporting ............................................................................................ 23 4.5. Isolation from Structures and other Work Parties / Sites .................................. 23 4.6. Suspension of Work ......................................................................................... 23 5. Job Planning .......................................................................................................... 25 5.1. General ............................................................................................................ 25 5.2. Job Risk Assessment ....................................................................................... 25 5.3. Work Site Set up .............................................................................................. 26 5.3.1 Weather ............................................................................................................ 27 5.3.2 Wind Velocity – International Beaufort scale..................................................... 28 5.4. Network Access ............................................................................................... 28 5.5. Communication ................................................................................................ 29 5.6. Public Safety .................................................................................................... 29 5.7. De-energised Circuits ....................................................................................... 29 5.8. Development of New Techniques .................................................................... 29 5.9. Cable Termination Boxes ................................................................................. 29 6. Equipment .............................................................................................................. 31 6.1. Care, Maintenance and Testing ....................................................................... 31 6.2. Personal Protective Equipment ........................................................................ 32 6.2.1 Care and Maintenance of Insulating Gloves and Sleeves ................................ 33 6.2.2 Frequency testing of Gloves and Sleeves ........................................................ 34 6.3. Insulating Barriers ............................................................................................ 34 6.3.1 Care and Maintenance of Rigid and Flexible Insulating Barriers ...................... 38 Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-6 6.4. Conductor Support Equipment ......................................................................... 39 6.4.1 Care and Maintenance of Wire Tong Saddles/ AU’s/ Temporary Cross-arms .. 45 6.5. Insulated Hand Tools ....................................................................................... 45 6.5.1 Care and Maintenance of Insulating Sticks ....................................................... 47 6.5.2 Universal and Grip-All Accessories ................................................................... 47 6.5.3 Frequency Testing for Insulated Sticks ............................................................. 48 6.6. Ropes ............................................................................................................... 48 6.7. Strain / Tensioning ........................................................................................... 49 6.8. Bridging Tools .................................................................................................. 50 6.9. Ladders ............................................................................................................ 53 6.10. Mobile Plant ..................................................................................................... 53 6.10.1 Elevating Work Platforms (EWP’s) ................................................................. 53 6.10.2 Care and Maintenance of EWP’s .................................................................... 54 6.10.3 Other Plant...................................................................................................... 55 6.10.4 Frequency Testing of EWP’s .......................................................................... 55 6.11. Hydraulic Tools ................................................................................................ 56 6.11.1 Using Hydraulic Tools in Direct Contact with Live HV Apparatus ................... 56 6.12. Summary of Testing and Inspection Intervals .................................................. 58 7. Techniques ............................................................................................................ 60 7.1. Applying insulating barriers / covers and mats ................................................. 60 7.1.1 Untying and retying conductors ........................................................................ 62 7.1.2 Trimming trees near live HV conductors ........................................................... 64 7.1.3 Fit Line Splices, Armour Rods, Bird Diverters and Spiral Vibration Dampers ... 66 7.2. Installing temporary bypass jumpers ................................................................ 68 7.2.1 Making and breaking bridges and taps (PG clamps) ........................................ 71 7.2.2 Energise overhead mains with a TDO fuse....................................................... 74 7.2.3 Change HV fuses unit(s) ................................................................................... 76 7.2.4 Installing inline isolators .................................................................................... 78 7.2.5 De-energise-Re-energise u/g cables connected to 22kV overhead system ..... 81 7.2.6 Fit and remove temporary polymeric insulator with turnbuckle ......................... 84 7.2.7 Recover and erect poles ................................................................................... 87 7.3. Change pole-top switch or switch pole ............................................................. 90 7.3.1 Maintain or repair pole top switches ................................................................. 94 7.3.2 Change surge diverters .................................................................................... 97 7.3.3 Repair tensioned conductor .............................................................................. 99 7.4. Change tension insulator ............................................................................... 101 7.4.1 Change suspension hardware ........................................................................ 103 Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-7 7.4.2 Change RDA insulator .................................................................................... 106 7.4.3 Displace conductors – tag lines ...................................................................... 110 7.5. Displace conductors – manual handling ......................................................... 112 7.5.1 Displace conductors – Aichi auxiliary arm ...................................................... 114 7.6. Displace conductors – three-phase lift using crane and lifting beam .............. 117 7.6.1 Displace conductors – crane boom-mounted auxiliary arm and mast ............. 120 7.6.2 Displace conductors – crane single conductor lift ........................................... 123 7.6.3 Displace conductors – pole or cross-arm mounted insulating auxiliary arm ... 125 7.7 Displace conductors – auxiliary arm .................................................................. 129 7.7.1 Displace conductors – anchor to crane boom ................................................. 133 7.7.2 137 Change pole-top switch – temporary bypass method .............................................. 137 7.7.3 Change RDA pole ........................................................................................... 140 7.7.4 Remove conductor sample mid-bay ............................................................... 144 7.5 Displace and replace earth return wire ........................................................... 146 7.6 Installation & Maintenance of Switchgear / Apparatus ................................... 150 7.7 Pole Top Switch / Gas Switches .................................................................... 150 7.8 Reclosers ........................................................................................................... 152 7.8.1 Links / Fuses, Surge Arresters and Recording Equipment ............................. 153 7.8.2 Animal Proofing .............................................................................................. 154 7.9 Terminals and Zone Substation Yards ........................................................... 155 7.9.1 Lifting Loads with EWP’s and Cranes ............................................................. 155 7.9.2 Single Person Tasks / One Glover Aloft ......................................................... 156 7.9.3 Night Work ...................................................................................................... 157 8 Training Authorisations and Competency ............................................................ 159 8.1 Authorisation .................................................................................................. 159 8.2 Personnel Selection ....................................................................................... 159 8.3 Re-assessment .............................................................................................. 159 8.4 Maintenance of Competency.......................................................................... 160 8.4.1 Continued Competency .................................................................................. 160 8.4.2 Re-entering the Live Work Field ..................................................................... 160 8.5 New Employees Commencing with Team ...................................................... 160 8.6 Crane / Borer Operators ................................................................................. 160 8.7 Medical Examination ...................................................................................... 161 8.8 Contractor Responsibilities ............................................................................ 161 9 Conductor Span Loadings .................................................................................... 163 9.1 Conductor Span Loadings .............................................................................. 163 Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-8 9.2 Vertical loads on hilltop terrain ....................................................................... 168 9.2.1 Hilltop terrain configuration ............................................................................. 168 9.2.2 Approximate conductor tension ...................................................................... 169 9.2.3 Conductor Mechanical Data............................................................................ 170 9.2.4 Vertical force of conductor .............................................................................. 171 9.2.5 Conductor angle loadings / copper conductors ............................................... 172 9.2.6 ACSR Conductors .......................................................................................... 174 9.2.7 Steel Conductors ............................................................................................ 177 9.2.9 All Aluminium Alloy Conductors ...................................................................... 180 10 Amendment Register ........................................................................................... 183 10.1 Amendments .................................................................................................. 183 Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed HORIZON POWER Page-9 1. Scope The High Voltage Live Work Manual has been compiled as a standard work technique document and as reference resource, to assists work parties who are conducting High Voltage (HV) Live Work techniques for all voltages up to and including 33kV. The techniques described within the manual have been designed and developed for the performance of HV Live Work on all types of pole and cross-arm structures, steel, timber, concrete and synthetic, utilising Insulating Stick and Glove & Barrier methods. All standards and techniques in the manual are designed to ensure the safety of the work party, the public and the security of distribution assets. It is the responsibility of the work party involved in HV Live Work to be fully conversant with all aspects and techniques of this manual and any subsequent amendments. The Glove and Barrier techniques in this manual have been developed in conjunction with live line workers and the Australian Standards for working on live HV using the Glove and Barrier method. All techniques in this manual include the roles and responsibilities of the HV Live Worker with the expectation to maintain current competencies and to create and manage a safe working environment at all times. The preceding HV Live Work techniques and work instructions in this manual must be adhered to at all times. Document Title: High Voltage Live Work Manual Issue Date: Document Number: CS# 2369013 © Horizon Power Uncontrolled when Printed