✨ Electricity Reliability Performance Measures




Reliability Performance Measures (Requirement 21)

Interruptions

Interruptions Average Interruption Targets 2008/2012 Interruption Targets 2008 Actual Interruptions
2007
Planned Interruptions
Class A 0.27 1 1
Class B 72 72 93
Unplanned Interruptions
Class C 130 130 263
Class D 7 7 3
Class E 2 2 9
Class F 2 2 0
Class G 2 4 0
Class H 4 3 0
Class Total 321 369

Proportion of total Class C interruptions not restored: =(a/b*100)[1]

where -

a = No. of interruptions not restored within

Within 3 Hours Within 24 Hours
a = 168 11
b = Total number of Class C
interruptions 263
Proportion expressed as % 63.88% 4.18%

Faults

Faults per 100 circuit kilometres of prescribed voltage electric line Average Faults Targets 2008/11 Faults Targets 2008 Actual number of faults
2007
Nominal Voltage
50kV 3.00 3.00 5.67
33kV 5.88 5.88 8.72
11kV 6.60 6.60 8.31
Total 6.26 6.26 8.07
Faults per 100 circuit kilometres of underground prescribed voltage electric line Actual number of faults
2007
Nominal Voltage
50kV 0.00
33kV 0.00
11kV 8.80
Total 8.71
Faults per 100 circuit kilometres of overhead prescribed voltage electric line Actual number of faults
2007
Nominal Voltage
50kV 5.69
33kV 8.73
11kV 8.29
Total 8.04


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Online Sources for this page:

VUW Te Waharoa PDF NZ Gazette 2008, No 55


Gazette.govt.nz PDF NZ Gazette 2008, No 55





✨ LLM interpretation of page content

πŸ—οΈ Reliability Performance Measures for Electricity Interruptions and Faults (continued from previous page)

πŸ—οΈ Infrastructure & Public Works
Electricity, Reliability, Interruptions, Faults, Performance Measures, Statistics