✨ Electricity Reliability Statistics




2382

NEW ZEALAND GAZETTE

No. 101

WESTPOWER LIMITED
SYSTEM RELIABILITY

Disclosure by line owners of reliability performance measures
as required by Regulation 16 of the Electricity (Information Disclosure) Regulations 1994

Part IV 1. of the first schedule
Total number of interruptions,
together with a breakdown of that total according to interruption class

Class A - Planned interruptions caused by Trans Power
0
0
1

Class B - Planned interruptions by Westpower
98
71
88

Class C - Unplanned interruptions by Westpower
220
135
89

Class D - Unplanned interruptions caused by Trans Power
10
6
5

Class E - Unplanned interruptions caused by ECNZ generation
0
0
0

Class F - Unplanned interruptions caused by Westpower generation
8
10
0

Class G - Other interruptions (Planned Westpower generation)
0
0
0

Total interruptions
336
222
183

Part IV 2. of the first schedule
The total number of faults per 100 circuit kilometres of prescribed voltage electric line
(Voltage equal to or greater than 3.3 kilovolts)

Total faults per 100 km
12.50
8.50
10.71

Part IV 3. of the first schedule
Total number of faults per 100 kilometres of underground prescribed voltage electric line

Nominal Line
Voltage

66kv / 50kv
0.00
0.00
0.00

33kV
0.00
0.00
0.00

11kV
17.70
18.20
3.53

Total faults per 100 km
17.50
18.00
3.49

Part IV 4. of the first schedule
Total number of faults per 100 kilometres of overhead prescribed voltage electric line

66kv / 50kv
16.83
25.21
21.04

33kV
8.37
7.09
3.17

11kV
12.65
8.21
11.39

Total faults per 100 km
12.42
8.34
10.70

Part IV 5. of the first schedule
The SAIDI for the total number of interruptions

646.7
835.42
435.90



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