NEW ZEALAND GAZETTE

No. 134

1997 1996 1995

Disclosure of reliability performance measures under regulation 16 of the Electricity (Information Disclosure) Regulations 1994

1 Total number of interruptions

• Class A - Planned - by Transpower 0 0 0
• Class B - Planned - by Line Owners 234 283 309
• Class C - Unplanned - by Line Owners 156 138 119
• Class D - Unplanned - by Transpower 2 4 2
• Class E - Unplanned - by ECNZ 0 0 0
• Class F - Unplanned - by other generation 0 0 0
• Class G - Any other loss of supply 0 0 0

Total 392 425 430

2 The total number of faults per 100 circuit kilometres of prescribed voltage electric line

11kV 11.73 10.38 8.95

3 The total number of faults per 100 circuit kilometres of underground prescribed voltage electric line

11kV 0.00 2.56 0.00

4 The total number of faults per 100 circuit kilometres of overhead prescribed voltage electric line

11kV 12.08 10.61 9.22

5 The SAIDI for the total number of interruptions

                                    353.09             388.34             411.53

6 The SAIDI for the total number of interruptions within each interruption class

• Class A - Planned - by Transpower 0.00 0.00 0.00
• Class B - Planned - by Line Owners 96.26 182.90 104.97
• Class C - Unplanned - by Line Owners 231.76 170.95 257.10
• Class D - Unplanned - by Transpower 25.07 34.49 49.46
• Class E - Unplanned - by ECNZ 0.00 0.00 0.00
• Class F - Unplanned - by other generation 0.00 0.00 0.00
• Class G - Any other loss of supply 0.00 0.00 0.00

7 The SAIFI for the total number of interruptions

                                    5.78               5.06               5.66

8 The SAIFI for the total number of interruptions within each interruption class

• Class A - Planned - by Transpower 0.00 0.00 0.00
• Class B - Planned - by Line Owners 0.54 0.97 0.59
• Class C - Unplanned - by Line Owners 4.48 3.30 3.97
• Class D - Unplanned - by Transpower 0.76 0.79 1.10
• Class E - Unplanned - by ECNZ 0.00 0.00 0.00
• Class F - Unplanned - by other generation 0.00 0.00 0.00
• Class G - Any other loss of supply 0.00 0.00 0.00

9 The CAIDI for the total number of interruptions

                                    61                 77                 73

10 The CAIDI for the total number of interruptions within each interruption class

• Class A - Planned - by Transpower 0 0 0
• Class B - Planned - by Line Owners 180 189 177
• Class C - Unplanned - by Line Owners 52 52 65
• Class D - Unplanned - by Transpower 33 44 45
• Class E - Unplanned - by ECNZ 0 0 0
• Class F - Unplanned - by other generation 0 0 0
• Class G - Any other loss of supply 0 0 0