Electricity Asset Management Plan 2019-2029
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Vector Limited://
Figure 4-32 Asset Health at Year 0 - Distribution Ground Mounted Transformers
Figure 4-33 Asset Health at Year 10 - Distribution Ground Mounted Transformers
Strategy Distribution transformers are maintained in accordance with Vector maintenance standard ESM503, Maintenance of Ground Mounted Transformers. Our present strategy is to replace transformers on failure. Transformers will not last indefinitely and have a stated asset life of 45 years and notwithstanding that there is no evidence of systemic failures, we will embark on a programme of targeted replacement using our CBARM model for this asset class in FY20. Transformer replacement is of course driven by network growth as well and as a result of overhead to undergrounding projects. We have seen growth in distributed energy resources connected to the LV network and as DERs supplement (and in the future even start to replace) generation, the LV network and distribution transformers will require increased attention and focus. As noted previously, the lack of visibility of the LV network and distribution transformers is being overcome thanks to advanced metering infrastructure and digital equipment and we have developed a LV visibility and development
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