✨ Reliability Performance Measures




Requirement 21

Disclosure of reliability performance measures

1 Total number of interruptions:

Network or generation owner Interruption class Classification of interruptions 2007 2006 2005 2004
Orion B Planned shutdowns 319 288 316 241
Orion C Unplanned cuts 520 499 462 403
Transpower A Planned shutdowns 1 - 2 4
Transpower D Unplanned cuts 14 5 5 8

Total interruptions: | 854 | 792 | 785 | 656 |

Interruption classes E, F and G do not apply to the company and consequently results are all zero.

2 & 3 Interruption targets:

Network or generation owner Interruption class Classification of interruptions 2008 Average 2008 - 2012
Orion B Planned shutdowns 385 385
Orion C Unplanned cuts 555 555

4 Proportion of 2006's Class C interruptions not restored within:

(a) 3 hours 38%

(b) 24 hours 11%

5(a) Faults per 100 circuit-km of electric line:

Voltage 2007 2006 2005 2004
66kV 0.5 2.2 1.2 0.0
33kV 3.2 2.9 3.8 2.0
11kV 9.4 9.2 8.5 7.7
All 8.7 8.6 8.0 7.1

(b) & (c) Target number of faults per 100 circuit-km of electric line:

Voltage 2008 Average 2008 - 2012
66kV 2 2
33kV 4 4
11kV 12 12
All 11 11


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Online Sources for this page:

VUW Te Waharoa PDF NZ Gazette 2008, No 25


Gazette.govt.nz PDF NZ Gazette 2008, No 25





✨ LLM interpretation of page content

πŸ’° Disclosure of reliability performance measures (continued from previous page)

πŸ’° Finance & Revenue
Reliability performance, Interruptions, Planned shutdowns, Unplanned cuts, Faults, Electric lines, Orion, Transpower