✨ Electricity Reliability Statistics




16 AUGUST 2005

NEW ZEALAND GAZETTE, No. 126

3059

Requirement 21 (3)

1

Total number of interruptions, together with a breakdown of that total according to interruption class.

Interruption Class Number of Interruptions
2005
MainPower
Planned Shut-Down (Class B) 236
Unplanned Interruption (Class C) 58
Trans Power
Planned Shut-Down (Class A) 1
Unplanned Interruption (Class D) 2
Generation
Unplanned Interruption (Class E) -
Generation Other
Unplanned Interruption (Class F) -
Other
Other Interruptions (Class G) -
Unplanned Interruption (Class G) -
Total Interruptions 297

2

The total number of faults per 100 circuit kilometres of prescribed voltage electric line.

Nominal Voltage Faults per 100 km Total
2005
33 kV 3.24
11 kV 1.48
TOTAL 1.66

3

The total number of faults per 100 circuit kilometres of Underground prescribed voltage electric line, together with a breakdown of that total according to different nominal line voltages.

Nominal Voltage Faults per 100 km Underground
2005
33 kV 3.09
11 kV -
TOTAL 3.03

4

The total number of faults per 100 circuit kilometres of Overhead prescribed voltage electric line, together with a breakdown of that total according to different nominal line voltages.

Nominal Voltage Faults per 100 km Overhead
2005
33 kV 3.27
11 kV 1.44
TOTAL 1.60

5

The SAIDI for the total of interruptions:

2005 2004 2003 2002
SAIDI 115.5685 99.64 284.35 213.73

6

The SAIDI for the total number of interruptions within each interruption class:

Network or Generation Owner Classification Minutes per Connected Customer
2005
MainPower Planned Shut-Down (Class B) 49.7782
Unplanned Interruption (Class C) 49.5696
Trans Power Planned Shut-Down (Class A) 13.2698
Unplanned Interruption (Class D) 2.9509
Generation Unplanned Interruption (Class E) -
Generation Other Unplanned Interruption (Class F) -
Other Other Interruptions (Class G) -
Unplanned Interruption (Class G) -

7

The SAIFI for the total number of interruptions:

2005 2004 2003 2002
SAIFI 1.1657 1.21 2.70 1.45


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Online Sources for this page:

VUW Te Waharoa PDF NZ Gazette 2005, No 126


Gazette.govt.nz PDF NZ Gazette 2005, No 126





✨ LLM interpretation of page content

🏭 MainPower New Zealand Ltd Reliability Performance Measures (continued from previous page)

🏭 Trade, Customs & Industry
Electricity reliability, Interruption statistics, Fault rates, Performance targets, Energy distribution