Reliability Performance Measures




Reliability Performance Measure Targets

Total interruptions

2007 2006 2005 2004
Class A – Planned by Transpower - - - -
Class B – Planned by Electra 81 88 84 80
Class C – Unplanned by Electra 128 109 106 118
Class D – Unplanned by Transpower 4 4 1 2
Class E – Unplanned by embedded generation - - - -
Class F – Unplanned by generation on other network - - - -
Class G – Unplanned by other line owner - - - -
Class H – Planned by other line owner - - - -
Class I – Any other loss of supply - - - -
Total 213 201 191 200

Interruptions Target for Following Financial Year

2008 2007 2006 2005
Class B – Planned 75 75 75 75
Class C – Unplanned 95 95 95 95
Total 170 170 170 170

Average Interruptions Targets (next and subsequent 4 years)

2008/12 2007/11 2006/10 2005/09
Class B – Planned 75 75 75 70
Class C – Unplanned 95 95 95 95
Total 170 170 170 170

Proportion of the total Class C interruptions not restored within:

2007 2006 2005 2004
a) 3 hours - 9.3% 3.1% 2.8% 2.55%
b) 24 hours - 0% 0% 0% 0.04%

Number of Faults per 100 Circuit Kilometre

2007 2006 2005 2004
33kV 1.17 0.57 0.57 6.32
11kV 7.64 9.46 8.34 10.28
Total number of faults 6.90 8.19 7.87 9.72


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Online Sources for this page:

VUW Te Waharoa PDF NZ Gazette 2008, No 30


Gazette.govt.nz PDF NZ Gazette 2008, No 30





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🏭 Reliability Performance Measure Targets (continued from previous page)

🏭 Trade, Customs & Industry
Electricity, Reliability, Interruptions, Targets, Performance Measures, Faults