New Zealand Gazette – 2005 – No. 7

Page 160

✨ Electricity Reliability Statistics



Reliability Performance Measures (Requirement 21)

SAIFI

Average SAIFI Targets SAIFI Targets 2004 Actual SAIFI 2004
Class 2004/08 2004 2003 2002

SAIFI for total number of interruptions (= a/b)

where -

a = sum of electricity consumers affected by each of those interruptions
b = Total consumers

| | | | 2.82 | 2.78 | 4.39 | 3.55 |

SAIFI Targets (=a/b)

Planned Interruptions

Class B

| 0.30 | 0.30 |

Unplanned Interruptions

Class C

| 1.70 | 1.70 |

where -
Planned interruptions

a = projected number of electricity consumers affected by each of those interruptions
b = Projected total customers

| 7,463 | 7,463 |
| 24,876 | 24,876 |

Unplanned Interruptions

Class C

a = projected number of electricity consumers affected by each of those interruptions
b = Projected total customers

| 42,289 | 42,289 |
| 24,876 | 24,876 |

SAIFI for total number of interruptions within each interruption class (= a/b)

Class
Class A 0.02 0.07 0.00 0.11
Class B 0.20 0.39 0.29 0.41
Class C 1.75 2.54 2.28 3.57
Class D 0.84 0.21 0.27 0.50
Class E 0.00 0.00 0.00 0.00
Class F 0.00 0.00 0.00 0.00
Class G 0.01 0.00 0.00 0.00
Class H 0.00 0.00 0.00 0.00
Class I 0.00 0.00 0.00 0.00

SAIFI for total of interruptions

where -
a = sum of electricity consumers affected by each of those interruptions within that interruption class
b = Total consumers

| | 2.82 | 2.78 | 4.39 | 3.56 |

Class
Class A 375 1,883 2,889
Class B 5,026 9,765 7,478 10,849
Class C 43,485 64,049 58,173 93,310
Class D 20,791 5,000 5,430 6,955
Class E 0 0 0 0
Class F 0 0 0 0
Class G 180 0 0 0
Class H 0 0 0 0
Class I 0 0 0 0

b = Total consumers

| 24,876 | 25,254 | 25,552 | 26,128 |



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Online Sources for this page:

VUW Te Waharoa — PDF NZ Gazette 2005, No 7


Gazette.govt.nz — PDF NZ Gazette 2005, No 7




✨ LLM interpretation of page content

🏗️ Reliability Performance Measures (Requirement 21) (continued from previous page)

🏗️ Infrastructure & Public Works
Electricity, Reliability, SAIFI, Interruptions, Performance Measures, Statistics