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New Zealand Gazette – 1997 – No. 118

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✨ Electricity Reliability Statistics

8 SEPTEMBER

NEW ZEALAND GAZETTE

2807

Regulation 16

5. Reliability Performance Measures

(1) Interruptions

	Year Ended 31 March
	1997
Class
Class A	0
Class B	661
Class C	1,515
Class D	6
Class E	0
Class F	0
Class G	0
Total	2,182

Total number of faults per 100 circuit kilometres of prescribed voltage electric lines

(2) Total System:

	1997	1996	1995
- 110kV	4.00	0	0
- 66kV	0.81	3.11	4.40
- 33kV	6.15	5.38	9.00
- 11kV	22.28	22.20	24.40
Total	19.76	20.14	22.60

(3) Underground Circuit:

	1997	1996	1995
- 33kV	2.26	4.18	2.90
- 11kV	6.17	5.29	8.40
Total	5.86	5.21	8.00

(4) Overhead Line:

	1997	1996	1995
- 110kV	4.00	0	0
- 66kV	0.81	3.64	4.40
- 33kV	8.55	5.58	9.70
- 11kV	25.15	25.10	27.30
Total	22.10	22.70	25.00

(5) The SAIDI for total of interruptions (minutes):

1997	1996	1995
219.40	233.00	309.00

(6) The SAIDI for total interruptions within each interruption class (minutes):

Class	1997	1996	1995
Class A	0	63.40	62.00
Class B	23.01	28.50	44.00
Class C	164.93	129.10	154.00
Class D	31.54	12.00	49.00
Class E	0	0	0
Class F	0	0	0
Class G	0	0	0

(7) The SAIFI for total of interruptions

1997	1996	1995
4.58	3.36	5.06

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VUW Te Waharoa — NZ Gazette 1997, No 118

NZLII — NZ Gazette 1997, No 118

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🏗️ Performance Measures and Statistics for the year ending 31 March 1997 (continued from previous page)

Domain🏗️ Infrastructure & Public Works
KeywordsElectricity, Performance Measures, Statistics, Reliability, Interruptions, SAIDI, SAIFI, Voltage Lines

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