T&D World Magazine

Ausgrid Upgrades Two Sydney Area Substations with Gas Insulated Switchgear

Work to connect four 40-ton transformers, electrical switchgear and protection equipment has started as part of the replacement of two major electrical supply points in the Sutherland Shire, Australia. The two zone substations at Engadine and Gwawley Bay were built in 1964 and 1970 and supply power to about 19,000 homes and businesses in the Sydney area.

Ausgrid General Manager Transmission Trevor Armstrong said peak demand for power across the shire was also growing at about one per cent a year. "The existing substations have performed well over the years, but its now time to replace them," Armstrong said. "We're also making sure they can cater for the growing peak demand for power in the shire."

Both substations are expected to be powering homes and business by late next year.

Project details

  • Gwawley Bay substation includes the installation of:
  • Two 37.5-MVA 132/11-kV transformers
  • 41 control and protection panels
  • 7 panels of 132-kV gas insulated switchgear
  • 12 panels of 11kV switchgear

The electrical fit out of Engadine substation will include:

  • Two 37.5-MVA 132/11-kV transformers
  • 45 control and protection panels
  • 6 panels of 132-kV gas insulated switchgear
  • 21 panels of 11-kV switchgear.
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