Overview
The Western Treatment Plant (WTP) processes 55% of Melbourne’s sewerage, approximately 485 ML/day, and the effluent water is treated via both the 25W and 55E lagoons before being discharged to Port Phillip Bay.
Challenge
WTP was looking to improve assets and infrastructure to increase reliability, safety, and address environmental concerns. Ageing electrical infrastructure posed a reliability risk to the lagoon aeration system, in particular six existing HV kiosk transformer substations. An arc flash risk was also identified for these ageing assets. Improving the reliability of electrical assets mitigated the risk of an EPA license breach due to aerators being offline as a consequence of equipment failure.
Solution
Middleton Group prepared the detailed design for the HV and LV electrical, control, communications components of the WTP 25W Pond 1 HV Kiosk Substation Upgrade. We developed protection settings for LV and HV components, kiosk substation specification and electrical layouts and cable specifications for substation connections.
Results
As a result of the detailed plan provided by Middleton Group. Melbourne Water was able to swiftly upgrade the assets, significantly increasing the reliability and safety of its processes.
