Snowy Hydro – Murray 1 Power Station

Snowy Hydro Limited Murray 1 Power Station at Khancoban required the installation of HV Earth Switches to safely isolate each generator set when maintenance is required.
Our local Tumut based team provided the solution to take away the risk from personnel having to place portable earths when isolating.

Remote operated motorised earth switches were used in conjunction with HV cabling connecting the earthing point to exposed generator busbars, the challenge was to install the HV cable in a way that would not encroach HV clearance tolerances for phase to phase, or phase to earth faults.

Six earth switches were required to be installed per generator group, cabled, HV terminations completed, and commissioned in reduced time outages to minimise the downtime to generation capability of the Snowy scheme, all whilst providing our client with a high quality installation, with all safety risks controlled.


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