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New Zealand Gazette – 1999 – No. 175

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✨ Reliability Performance Measures

NEW ZEALAND GAZETTE

19 NOVEMBER

STATEMENT OF PERFORMANCE MEASURES AND STATISTICS

for the year ended 31 March 1999

RELIABILITY PERFORMANCE MEASURES (continued)

Interruption Class		1999	1998	1997	1996
A	Planned Interruption by Transpower	Number	1	5	2
		SAIDI	1.7	31.5	26.9
		SAIFI	0.00	0.32	0.24
		CAIDI	37.0	99.9	112.0

| B | Planned Interruption by Other Line Owner | Number | 37 | 47 | 43 | 25 | 34 |
| | | SAIDI | 157.2 | 245.7 | 98.6 | 166 | 201 |
| | | SAIFI | 0.80 | 2.09 | 0.93 | 1.04 | 1.20 |
| | | CAIDI | 187.2 | 117.1 | 106.0 | 160 | 167 |

| C | Unplanned Interruption by Other Line Owner | Number | 99 | 84 | 178 | 59 | 88 |
| | | SAIDI | 361.6 | 989.7 | 748.0 | 499 | 1081 |
| | | SAIFI | 7.80 | 7.31 | 7.09 | 4.40 | 2.31 |
| | | CAIDI | 46.3 | 135.4 | 105.5 | 115 | 469 |

| D | Unplanned Interruption by Transpower | Number | 2 | 5 | 0 | 2 | 1 |
| | | SAIDI | 81.1 | 157.4 | 0 | 29 | 5 |
| | | SAIFI | 2.10 | 2.59 | 0 | 2.20 | 0.05 |
| | | CAIDI | 37.9 | 60.8 | 0 | 26 | 5 |

| E | Unplanned Interruption by ECNZ | Number | 0 | 0 | 0 | 1 | 0 |
| | | SAIDI | 0 | 0 | 0 | 7 | 0 |
| | | SAIFI | 0 | 0 | 0 | 1.00 | 0 |
| | | CAIDI | 0 | 0 | 0 | 7 | 0 |

| F | Unplanned Interruption by any other generator | Number | 0 | 0 | 0 | 0 | 0 |
| | | SAIDI | 0 | 0 | 0 | 0 | 0 |
| | | SAIFI | 0 | 0 | 0 | 0 | 0 |
| | | CAIDI | 0 | 0 | 0 | 0 | 0 |

| G | Unplanned Interruption not resulting from above | Number | 0 | 0 | 0 | 0 | 0 |
| | | SAIDI | 0 | 0 | 0 | 0 | 0 |
| | | SAIFI | 0 | 0 | 0 | 0 | 0 |
| | | CAIDI | 0 | 0 | 0 | 0 | 0 |

| Total | | Number | 139 | 141 | 223 | 87 | 125 |
| | | SAIDI | 602 | 1,424 | 872.8 | 729 | 1340 |
| | | SAIFI | 10.80 | 12.31 | 8.26 | 8.60 | 4.06 |
| | | CAIDI | 55.5 | 115.7 | 105.7 | 85 | 330 |

SAIDI - System Average Interruption Duration Index (minutes per customer per year)
SAIFI - System Average Interruption Frequency Index (interruptions per customer per year)
CAIDI - Customer Average Interruption Duration Index (minutes per customer interrupted)

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VUW Te Waharoa — NZ Gazette 1999, No 175

NZLII — NZ Gazette 1999, No 175

Parliament House (depicted) was completed in 1918 and remains the primary seat of Parliament.

✨ LLM interpretation of page content

🏗️ Reliability Performance Measures for Electricity Lines for the year ended 31 March 1999 (continued from previous page)

Domain🏗️ Infrastructure & Public Works
KeywordsElectricity, Reliability, Faults, Overhead lines, Underground lines, Prescribed voltage lines, SAIDI, SAIFI, CAIDI

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