10 SEPTEMBER NEW ZEALAND GAZETTE 2799

TOP ENERGY LIMITED

Performance Measures and Statistics
For the Year Ended 31 March 1999

Regulation 22

Reliability Performance Measures

i. Total number of interruptions and breakdowns by interruption class

Class Type of Interruption 5 Yr Target 1999 1998 1997 1996
Average 2000 No No No No
A Planned - Transpower 350 350 0 0 1 1
B Planned - Top Energy 160 180 278 363 356 324
C Unplanned - Top Energy 250 133 210 198
D Unplanned - Transpower 7 0 2 8
E Unplanned - Embedded Generation 0 0 0 0
F Unplanned - Other Generation 0 0 0 0
G Unplanned - Another Line owner 0 0 0 0
H Planned - Another Line owner 0 0 0 0
I Any other interruption 0 0 0 0
Total - All interruptions 535 496 569 531

Class C Interruptions not restored:
a Within 3 hours 37%
b Within 24 hours 0%

ii. Number of faults per 100 circuit kms

Line Voltage Total Underground Overhead
1999 1998 1997 1996 1999 1998 1997 1996 1999 1998 1997 1996
100kV
66kV
33kV 0.42 0.42 2.93 2.93 0 0 0 0 0.42 0.42 2.93 2.93
11kV 4.26 4.28 4.52 4.53 0 0 0 0 4.33 4.34 4.57 4.59
6.6kV
3.3kV
Total 3.99 4.00 4.40 4.42 0 0 0 0 4.04 4.05 4.45 4.46

Target Faults: 5 Yr Target 5 Yr Target 5 Yr Target
Average 2000 Average 2000 Average 2000
33kV 5.0 0.5 0 0 0.5 0.5
11kV 4.3 4.3 0 0 4.3 4.3
Total 4.0 4.0 0 0 4.0 4.0

iii. Breakdown of statistics by interruption class

Class Type of Interruption SAIDI (Minutes) SAIFI (Interruptions) CAIDI (Minutes)
1998 1997 1996 1998 1997 1996 1998 1997 1996
A Planned - Transpower 0 0 45 0.0 0.0 0.5 0.0 0.0 167.0
B Planned - Top Energy 163 189 179 1.4 2.2 5.4 121.0 86.0 33.0
C Unplanned - Top Energy 574 243 412 8.4 3.6 8.0 69.0 68.0 52.0
D Unplanned - Transpower 391 0 75 6.0 0.0 1.6 66.0 0.0 45.0
E Unplanned - Embedded Gen 0 0 0 0.0 0.0 0.0 0.0 0.0 0.0
F Unplanned - Other Gen 0 0 0 0.0 0.0 0.0 0.0 0.0 0.0
G Unplanned - Another Line 0 0 0 0.0 0.0 0.0 0.0 0.0 0.0
H Planned - Another Line 0 0 0 0.0 0.0 0.0 0.0 0.0 0.0
I Any other interruption 0 0 0 0.0 0.0 0.0 0.0 0.0 0.0
Total - All interruptions 1128 432 711 15.8 5.8 15.3 72.0 74.0 46.0

Targets: 5 Yr Target 5 Yr Target 5 Yr Target
Average 2000 Average 2000 Average 2000
B Planned - Top Energy 175 180 3.5 4.5 50 40
C Unplanned - Top Energy 385 410 7.0 7.5 55 55