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

0BInvestment Evaluation Summary
TNM-GS-809-0720
This project comprises the following works at Burnie Substation:
� replacement of five Reyrolle type 110/OS/10 circuit breakers with dead tank circuit breakers that have integral
current transformers;
� replacement of three Sprecher and Schuh type HPFw-311-L circuit breakers with dead tank circuit breakers that
have integral current transformers;
� decommissioning of the existing post type current transformers;
� installation of five three-phase sets of voltage transformers;
� replacement of the Burnie–Emu Bay 110 kV transmission line protection;
� replacement of the Burnie–Hampshire 110 kV transmission line protection;
� replacement of the Sheffield–Burnie No 2 110 kV transmission line protection; and
� replacement of the bus-coupler protection.
Figure 3 provides a summary of the age of the 110 kV assets (by category) at Burnie Substation by asset replacement
cost of (note that the scope of this project excludes replacement of power transformers, post insulators, disconnectors,
selected protection and control systems and shunt capacitors). Figure 3 clearly illustrates that the vast majority of the
assets included in the Burnie Substation 110 kV redevelopment project are well beyond their nominal service lives of 45
years for primary assets and 15 years for secondary assets as defined by Sinclair Knight Merz in its ‘Assessment of
Economic Lives for Transend Regulatory Asset Classes’ report prepared in April 2008 provided as attachment 24 of
Transend’s revenue proposal. The majority of the primary assets at Burnie Substation will be over 55 years old when
replaced (the circuit breakers will be 62 years old).
Figure 2 - Age and replacement value ($000) of major equipment installed at Burnie Substation
3 PROJECT TIMING
The timing of this project has been co-ordinated with the prioritised 110 kV circuit breaker replacement program and the
overall capital works program. This project is currently ranked 28th of all projects in Transend’s works prioritisation tool
and 11th of all renewal projects. The project is currently scheduled to commence in 2011 and be completed in 2014.
It is likely that components of this project may need to be implemented prior to the planned commencement of the
project because of the deteriorated condition of certain assets and the fact that additional asset condition issues will most
likely be identified prior to commencement of the project. It should be noted that these works, should they be needed,
will not result in the need for significant rework because the substation is not being reconfigured.
© Transend Networks Pty Ltd 4 of 12