Appendix E. Common reliability measures definitions and AER's preliminary views AEMC’s AER recommended preliminary definitions views Part 1 Measurements – SAIFI, MAIFI and MAIFIe The AER or System supports this Average definition for Interruption the distribution Duration Index in reliability respect of a measures relevant period, guidelines. means the sum of The AER the durations of all proposes to the Sustained undertake a Interruptions (in more detailed minutes) that have review to occurred during the implement this relevant period, definition divided by the under the Customer Base. STPIS. SAIFI or System Average Interruption Frequency Index in respect of a relevant period, means the total number of As Sustained Interruptions that have occurred during the relevant period, divided by the Customer Base. or Momentary Average Interruption Frequency Index in respect of a relevant period, means the total number of As above. Momentary Interruptions that have occurred during the relevant period, divided by the Customer Base, provided that Momentary Interruptions that
Appendix E. Common reliability measures definitions and AER's preliminary views AEMC’s recommended definitions AER preliminary views Part 1 Measurements – SAIFI, MAIFI and MAIFIe or System Average Interruption Duration Index in respect of a relevant period, means the sum of the durations of all the Sustained Interruptions (in minutes) that have occurred during the relevant period, divided by the Customer Base. The AER supports this definition for the distribution reliability measures guidelines. The AER proposes to undertake a more detailed review to implement this definition under the STPIS. SAIFI or System Average Interruption Frequency Index in respect of a relevant period, means the total number of Sustained Interruptions that have occurred during the relevant period, divided by the Customer Base. As or Momentary Average Interruption Frequency Index in respect of a relevant period, means the total number of Momentary Interruptions that have occurred during the relevant period, divided by the Customer Base, provided that Momentary Interruptions that As above.
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