Major electrical supply points under replacement

Work to connect four 40 tonne transformers, electrical switchgear and protection equipment has started as part of the replacement of two major electrical supply points in Sutherland Shire, south of Sydney.

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.

Ausgrid transmission general manager Trevor Armstrong said the existing substations had performed well over the years, but it was now time to replace them as peak demand for power across the shire was growing at about 1 per cent a year.

“We’re also making sure they can cater for the growing peak demand for power in the shire,” Mr Armstrong said.

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

Gwawley Bay substation includes the installation of two 37.5 MVA 132/11kV transformers, 41 control and protection panels, seven panels of 132kV gas-insulated switchgear and 12 panels of 11kV switchgear.

The electrical fit-out of Engadine substation will include two 37.5 MVA 132/11kV transformers, 45 control and protection panels, six panels of 132kV gas-insulated switchgear, and

21 panels of 11kV switchgear.

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