Electricity Asset Management Plan 2019-2029
184
Vector Limited://
PROPOSED INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Mangere Central 11 kV SWBD Replace
1.50
1.50
White Swan 11 kV SWBD replace
1.00
3.48
4.48
Warkworth 11 kV SWBD replace
0.20
3.40
3.60
Mt Wellington 11 kV SWBD Replace
0.08
0.08
Otara 11 kV SBWD arc flash doors
0.20
0.20
Freemans Bay 11 kV SWBD replace
1.00
3.48
4.48
Pakuranga 11 kV SWBD Replace
1.00
3.18
4.18
Wiri 11 kV vacuum CBs retrofit and upgrade protection
0.50
2.18
2.68
Papakura 11 kV vacuum CBs retrofit
0.50
0.50
Sandringham 11 kV SWBD Replace
1.50
3.50
5.00
Manukau 11 kV SWBD Replace
1.00
2.56
3.56
Hobsonville 11 kV SWBD Replace
0.80
2.76
3.56
Ponsonby 11 kV vacuum CBs retrofit
0.50
0.50
New Lynn 11 kV SWBD replace
1.20
2.80
4.00
Te Papapa 11 kV SWBD Replace
1.00
3.28
4.28
James St 11 kV SWBD Replace
1.00
3.00
4.00
Quay 11 kV SWBD Replace
0.20
3.54
3.74
St Heliers 11 kV vacuum CBs retrofit
0.80
1.48
2.28
Rockfield 11 kV vacuum CBs retrofit
1.00
1.00
Rosebank 11 kV vacuum CBs retrofit
0.70
0.70
Hillcrest 11 kV vacuum CBs retrofit
0.61
0.61
Kingsland 11 kV vacuum CBs retrofit
0.50
0.50
Papakura 11 kV SBWD replace
1.20
3.00
4.20
Sunset Rd 11 kV SWBD replace
1.20
4.00
5.20
Henderson Valley 11 kV SWBD replace
1.20
3.00
4.20
Victoria 11 kV SWBD replace
1.00
4.50
5.50
Woodford 11 kV SBWD replace
0.70
2.00
2.70
Manly 11 kV SWBD replace
1.00
3.20
4.20
East Coast Rd 11 kV SWBD replace
0.40
1.00
1.40
Mt Albert 11 kV SWBD replace
0.50
1.00
1.50
Newton 11 kV SWBD replace
1.50
4.00
5.50
McLeod Rd 11 kV SWBD replace
0.60
1.10
1.70
Waikaukau 11 kV SWBD replace
1.50
1.50
Total CAPEX
2.98
9.88
12.64
12.02
10.08
9.03
7.10
14.90
6.80
7.60
93.03
GAS MONITORING INSTALLATION LIVERPOOL 110 KV SWITCHGEAR
NEEDS STATEMENT The 110 kV switchgear at Liverpool zone substation in the Auckland CBD has been in service since 1998. The switchgear is fitted with two stage gas density switches per SF6 gas compartment and these are signalled to Vector’s EOC at bay level but there is no visibility of a compromised gas compartment until alarm levels are reached. The switchgear is reaching a stage in its asset life where accelerated gas leaks can develop rapidly with weaknesses in seals over time. To avoid unexpected shut-downs manual inspections are undertaken every two months as part of the station maintenance regime where the gas is checked to be above the alarm points. Manual inspections are labour intensive and readings from inspection to inspection do not provide any trends due to the macro scale of the fitted pressure gauges with slow leaks being virtually imperceptible between periods.
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