Transend - Appendix 5 Renewal capital expenditure - Australian ...

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7. OPTIONS ANALYSIS The following viable options have been considered: 0BInvestment Evaluation Summary TNM-GS-809-0720 1. Replace existing wood poles in twin wood pole structures with new wood poles i.e. 2 wood poles required. 2. Replace existing twin wood pole structures with single steel pole at suspension towers and twin steel poles at strain towers. The Burnie - Waratah Wooden Poles Transmission Line HV Insulator - Condition Assessment Report TNM-CR-808- 0888 provides further information on these options. 8. OPTION ESTIMATES Whole-of-life costing indicates that replacement with steel poles provides the least cost solution. Estimates have been prepared based on this basis. 9. PREFERRED OPTION The preferred option is to replace existing wood pole structures with steel poles. Historical inspection and test results indicate that approximately 70 structures will be condemned and require replacement in the next planning period at a total cost of approximately $5.8m dollars ($2008-09). 10. RISK EVALUATION The replacement of the poles will undertaken with the transmission line out of service and pre qualified external service providers will be required to undertake the replacements. The contractor will install the poles to a standard design. By having the transmission line out of service and using pre qualified service providers the risk rating is assessed as low. Project Number ND0966 4 of 4
Burnie-Waratah 110 kV Transmission Line Wood Poles TNM-CR-808-0888 Issue 1.0, November 2008 Burnie-Waratah 110 kV Transmission Line Wood Poles Condition Assessment Report APPROVED UNCONTROLLED WHEN PRINTED COPYRIGHT © TRANSEND NETWORKS PTY LTD ALL RIGHTS RESERVED This document is protected by copyright vested in Transend Networks Pty Ltd. No part of the document may be reproduced or transmitted in any form by any means including, without limitation, electronic, photocopying, recording or otherwise, without the prior written permission of Transend. No information embodied in the documents which is not already in the public domain shall be communicated in any manner whatsoever to any third party without the prior written consent of Transend. Any breach of the above obligations may be restrained by legal proceedings seeking remedies including injunctions, damages and costs.
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APPENDIX 5 Transend, Renewal capita
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Renewal Capital Expenditure TNM-GR-
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Figure 4 - Overview of the Reyrolle
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Table 3 - Circuit criticality ratin
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Figure 6 - Capacitive voltage trans
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Current transformer make / type Mod
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1.6.5 Protection and control Renewa
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CONTENTS 0BInvestment Evaluation Su
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0BInvestment Evaluation Summary TNM
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5 CUSTOMER CONSULTATION 0BInvestmen
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� implementation of revised maint
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Table 1 - Summary of economic analy
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7.3 OPTION 3 - STAGED REPLACEMENT O
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4.8 BUS CONDUCTOR AND FITTINGS 0BIn
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6 BENEFITS The direct benefits of r
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7.2.3 DRAWBACKS The option has the
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Figure 2 - Option 3: single line di
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This option includes: � installin
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INVESTMENT EVALUATION SUMMARY 0BInv
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1 BACKGROUND 0BInvestment Evaluatio
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4.1 CIRCUIT BREAKERS 0BInvestment E
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� reduced burden on spare parts m
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� replacement of the 110 kV Meado
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� reduced burden on spare parts m
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4.2 VOLTAGE TRANSFORMERS The 110 kV
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Page 119 and 120: 4.1.2 TUNGATINAH SUBSTATION 0BInves
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Page 123 and 124: Tarraleah-New Norfolk No. 1 110 kV
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Page 136 and 137: 5. CUSTOMER CONSULTATION 0BInvestme
Page 138 and 139: Table 3 - Summary of NPV cost analy
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Page 142 and 143: � loss of back-up protection func
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