Electricity Asset Management Plan 2019-2029
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Vector Limited://
to monitor network performance such as voltage and quality of supply to assist with the operation of the LV network and loss of supply to assist with restoration management during storms etc.
In line with the requirements of the Auckland Unitary Plan any new LV distribution feeders in Vector’s network will be underground. Where there is a need to replace LV overhead conductors this will be undertaken with either aerial bundled conductors or covered conductors.
4.6 DISTRIBUTION GROUND MOUNTED SUBSTATIONS Population and Age
There is a mix in terms of what the distribution substations contain; some are switchgear only, others contain switchgear and transformers while others still contain only transformers. The table below provides a view of our total population of all types of distribution ground mounted substations.
DESCRIPTION
AUCKLAND
NORTHERN
No of distribution substations ground mounted all types
7806
9020
No of distribution substations in a concrete block, blockwall or brick building No of distribution substations with steel, aluminium, fibre glass or other canopies
1895
27
5904
8993
No of underground distribution substations
7
0
Table 4-18 Key statistics for Distribution Ground Mounted Substations
The graph below provides a view of the age of distribution ground mounted substations.
Figure 4-24 Age Profile for Distribution Ground Mounted Substations
Strategy Distribution ground mounted substations are maintained in accordance with ESM503 Maintenance of Ground Mounted Distribution Equipment and Voltage Regulators. To deliver to this, extensive routine and operational preventive activities are implemented that include cyclical inspections, planned maintenance, asset inspections, maintenance servicing and condition testing. These preventive tasks uncover non-compliant or serviceability asset observations which are then treated as a corrective maintenance action or an asset renewal action depending on the extent and risk with regard to performance and safety.
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