Energy Reliability Statistics




Reliability Performance Measure Targets

Total interruptions

2005 2004 2003 2002
Class A – Planned by Transpower - - - -
Class B – Planned by Electra 84 80 78 87
Class C – Unplanned by Electra 106 118 88 66
Class D – Unplanned by Transpower 1 2 1 1
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 191 200 167 154

Interruptions Target for Following Financial Year

2006 2005 2004 2003
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)

2006/10 2005/09 2004/08 2003/07
Class B – Planned 75 75 75 70
Class C – Unplanned 95 95 95 86
Total 170 170 170 164

Proportion of the total Class C interruptions not restored within:

2005 2004 2003
a) 3 hours - 2.8% 2.55% 0%
b) 24 hours - 0% 0.04% 0%

Number of Faults per 100 Circuit Kilometre

2005 2004 2003 2002
33kV 0.57 6.32 1.73 2.21
11kV 8.34 10.28 8.27 6.01
Total number of faults 7.87 9.72 7.32 5.45


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Online Sources for this page:

VUW Te Waharoa PDF NZ Gazette 2005, No 134


Gazette.govt.nz PDF NZ Gazette 2005, No 134





✨ LLM interpretation of page content

🌾 Energy delivery performance measures and system statistics (continued from previous page)

🌾 Primary Industries & Resources
Energy, Performance measures, System lengths, Transformer capacity, Electricity demand, Interruptions, Faults, Reliability