Under clause 2.10.2(d) of the Electricity Transmission Code, ElectraNet is required to repair or replace a failed transformer in the Adelaide Central Area as soon as possible so as to minimise the likelihood of an interruption to supply to that area as a result of the failure of any other transformer installed at the relevant connection point.
Until 1 January 2012, there is only one transformer installed in the area, with a level of operational redundant capacity provided by the sub-transmission network. As such, the Commission has identified that the clause may need to be amended to clarify the intent that ElectraNet should effect the repair or replacement of the failed transformer as soon as possible to prevent the likelihood of an interruption as a result of not only the failure of any other transformer but, until 1 January 2012, also of any equivalent transformer capacity, such as the sub-transmission network.
It is the Commission’s position that it is appropriate to amend clause 2.10.2(d) of that code so as to reflect the position outlined above.
As is the case with any variation proposed for an industry code made by the Commission under the authority of the Essential Services Commission Act 2002, the Commission is seeking stakeholder views on the proposal to vary clause 2.10.2(d) of the Electricity Transmission Code on or before the close of business on Friday 6 May 2011.
Information on the manner in which submissions may be made is set out on the inside front cover of the Discussion Paper.
Following the receipt of submissions, the Commission will further consider this matter and made a Final Decision in June 2011. If the outcome of those further considerations is a decision to give effect to the amendment as proposed (or a variant of that proposal), the Commission would make that amendment effective from 1 July 2011.
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The Commission has amended clause 2.10.2(d) of the Electricity Transmission Code, with effect on and from 1 July 2011. The amendment requires ElectraNet to effect the repair or replacement of a failed transformer should failure occur in the Adelaide Central Area as soon as possible to prevent the likelihood of an interruption as a result of the failure of any other transformer (after January 2012) or of any equivalent transformer capacity utilised by ElectraNet to meet the exit point reliability standards for that area as mandated by the Electricity Transmission Code.
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