New Zealand Gazette – 1997 – No. 87

Page 2090

✨ Electricity Reliability Statistics



2090 NEW ZEALAND GAZETTE No. 87

Detailed shutdown analysis:

  1. Total Interruptions
    33kV Overhead
    33kV Underground
    11kV Overhead
    11kV Underground

    1996/97
    Unplanned [Class C] Planned [Class B]
    303 372
    15 7
    2 0
    226 305
    60 60

    1995/96
    Unplanned [Class C] Planned [[Class B]
    222 308
    11 0
    0 0
    161 272
    50 36

    1994/95
    Unplanned [Class C] Planned [Class B]
    287 400
    12 0
    0 0
    234 343
    41 57

  2. Total faults per 100km of line
    1996/97 1995/96 1994/95
    12.74 9.35 12.46

  3. Faults per 100km of underground line:
    33kV
    11kV

    1996/97 1995/96 1994/95
    18.56 15.15 12.8
    10.53 0 0
    19.05 16.50 13.50

  4. Faults per 100km of overhead lines
    33kV
    11kV

    1996/97 1995/96 1994/95
    11.74 8.41 12.4
    6.61 4.85 5.29
    12.38 9.17 13.32

SYSTEM AVERAGE INTERRUPTION DURATION INDEX [SAIDI]

  1. Total Interruptions
    1996/97 1995/96 1994/95
    164.4 111.8 172

  2. Class A
    Class B
    Class C
    Class D
    Class E
    Class F
    Class G

    1996/97 1995/96 1994/95
    0 0 0
    49.36 39.60 49.60
    115.05 72.20 122.40
    0 0 0
    0 0 0
    0 0 0
    0 0 0

SYSTEM AVERAGE INTERRUPTION FREQUENCY INDEX [SAIFI]

  1. Total Interruptions
    1996/97 1995/96 1994/95
    3.13 1.97 3.08

  2. Class A
    Class B
    Class C
    Class D
    Class E
    Class F
    Class G

    1996/97 1995/96 1994/95
    0 0 0
    0.42 0.35 0.53
    2.71 1.62 2.55
    0 0 0
    0 0 0
    0 0 0
    0 0 0



Next Page →

PDF embedding disabled (Crown copyright)

View this page online at:


VUW Te Waharoa — PDF NZ Gazette 1997, No 87


NZLII — PDF NZ Gazette 1997, No 87




✨ LLM interpretation of page content

🏗️ Reliability Performance Measure for 1995/96 (continued from previous page)

🏗️ Infrastructure & Public Works
Electricity, Shutdowns, Planned, Unplanned, Reliability, Transpower, Distribution System, ECNZ