New Zealand Gazette – 2008 – No. 38

Page 887

✨ Electricity Reliability Statistics

Requirement 21 (3)

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

Interruption Class	Number of Interruptions
	2007
MainPower
Planned Shut-Down (Class B)	217
Unplanned Interruption (Class C)	200
Trans Power
Planned Shut-Down (Class A)	5
Unplanned Interruption (Class D)	5
Generation
Unplanned Interruption (Class E)	-
Generation Other
Unplanned Interruption (Class F)	-
Other
Other Interruptions (Class G)	-
Unplanned Interruption (Class G)	-
Total Unplanned Interruptions	427

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

Nominal Voltage	Faults per 100 km Total
	2007
33 kV	1.94
11 kV	5.86
TOTAL	5.56

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
	2007
33 kV	-
11 kV	3.18
TOTAL	3.13

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
	2007
33 kV	1.96
11 kV	6.04
TOTAL	5.68

5 The SAIDI for the total of interruptions *:

	2007
	236.535
	2006
---------------------------	--------
	109.175
	2005
---------------------------	--------
	115.568
	2004
---------------------------	--------
	99.64

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

Network or Generation Owner	Classification	Minutes per Connected Customer
		2007
MainPower	Planned Shut-Down (Class B)	31.661
	Unplanned Interruption (Class C)	185.454
Trans Power	Planned Shut-Down (Class A)	0.164
	Unplanned Interruption (Class D)	19.255
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 *:

2007
2.273

2006
1.845

2005
1.165

2004
1.21

VUW Te Waharoa — NZ Gazette 2008, No 38

Gazette.govt.nz — NZ Gazette 2008, No 38

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✨ LLM interpretation of page content

🏭 Disclosure of Reliability Performance Measures for MainPower New Zealand Limited (continued from previous page)

Domain🏭 Trade, Customs & Industry
KeywordsElectricity, Reliability, Interruptions, Performance Measures, MainPower New Zealand Limited, SAIDI, SAIFI, CAIDI

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