Project Description

Sydney Water engaged Thompson Controls – as part of the SMART Team, as a contractor at the ST Marys Sewerage Treatment Plant

St Marys STP is the largest of SWC Inland STPs, treating 37 mega litres per day and serving 160,000 people in St Marys and the surrounding areas extending to Dunheved, Mt. Druitt, St Clair, Kingswood, Cambridge Park, Orchard Hill and Erskine Park.

The objective of the SCADA Renewal Upgrade Project was to install and program a new plant wide SCADA System, including new Siemens S7 PLCs to replace the Square ‘D’ PLCs, the renewal and or replacement of all electrical starters and wiring at St Marys ST0011 in order to raise the existing level of automation to the required higher level of automation and improve the reliability of the plant.

Thompson Controls completed the design, supply, installation and commissioning as follows:

  • Construction of a new switch room
  • Supply and installation of multiple new single and double sided Form 3 LV switchboard
  • New PLC control panels
  • Electrical installation of three phase motors
  • Profibus control of fixed speed and variable speed motors
  • Supply and installation of instrumentation
  • Installation of lights and power
  • Modification of the existing security system
  • Modification of the existing fire detection system
  • Modification of the existing power distribution system
  • Installation of new fibre optics network


Project Details

Business unit: Energy
Client: St Marys Sewerage Treatment Plant
Current status: On Going
Start date: February 2014
Completion period: On Going
Contract type: Lump sum
Value: $12 Million