New Zealand Gazette – 1997 – No. 152

Page 3558

✨ Reliability Performance Measures



3558

NEW ZEALAND GAZETTE

No. 152

(e) Unplanned interruptions originating
with E.C.N.Z. Nil Nil Nil
(f) Unplanned interruptions originating with
Generators other than E.C.N.Z. Nil Nil Nil
(g) Interruptions not included in (a) to (f) Nil Nil Nil

The Nil interruption reported in categories (a), (e), (f) and (g) mean that the SAIDI, SAIFI and CAIDI data reported below are also Nil for each of these five categories of interruption.

  1. Total number of faults per 100 circuit kilometres of
    prescribed voltage electric line 17.09 13.28 11.93
  2. Total number of faults per 100 circuit kilometres of underground prescribed voltage line and per different nominal line voltages:-
    11 kV underground 1.64 8.7 4.55
    22 kV underground Nil Nil Nil
    Total 1.61 8.7 4.55
  3. Total number of faults per 100 circuit kilometres of overhead prescribed voltage line and per different nominal line voltages:-
    11 kV overhead 15.46 13.69 12.28
    22 kV overhead 27.27 18.18 22.73
    33 kV overhead 10.40 9.83 2.31
    Total 15.48 13.34 12.24
  4. The SAIDI for the total of interruptions (minutes) 414.00 468.58 464.42
  5. The SAIDI for the total number of interruptions
    within each interruption class:-
    (b) Planned interruptions by Counties
    Power(minutes) 78.61 171.46 179.74
    (c) Unplanned interruptions originating within
    Counties Power system (minutes) 335.38 295.03 283.40
    (d) Unplanned interruptions originating with
    Transpower system Nil 2.09 1.28
  6. The SAIFI for the total number of interruptions 7.40 5.60 5.19
  7. The SAIFI for the total number of interruptions
    within each interruption class:-
    (b) Planned interruptions by Counties Power 0.51 0.86 1.08
    (c) Unplanned interruptions originating within
    Counties Power system 6.89 4.69 4.06
    (d) Unplanned interruptions originating with
    Transpower system Nil 0.05 0.05
  8. The CAIDI for the total of all
    interruptions (minutes) 55.97 83.72 89.5
  9. The CAIDI for the total number of interruptions
    within each interruption class:-
    (b) Planned interruptions by Counties
    Power (minutes) 154.57 199.16 166.6
    (c) Unplanned interruptions originating within
    Counties Power system (minutes) 48.69 62.9 69.8
    (d) Unplanned interruptions originating within
    TransPower system (minutes) Nil 45.56 25

Number of customers has been calculated as the average of opening and closing figures for the year.



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🏭 Reliability Performance Measures (continued from previous page)

🏭 Trade, Customs & Industry
Reliability, Interruptions, Planned, Unplanned