The NEPEAN Power substation can be fully customised and engineered to suit individual requirements such as low height, high capacity and different voltages.  Solutions can be provided for open cut mines, underground mines and quarries in both flameproof and non-flameproof.  

Our range includes:

  • 66kV Switchyards
  • Surface medium voltage switchgear
  • Underground mining medium voltage switchgear

The adaptation of our products is made possible using the latest technology in SCADA control and the extensive experience of the NEPEAN Power engineering team.

The NEPEAN Power substation is available in various combinations of input and can be configured to suit any situation dependant on customer requirements.

The standard Substation allows for a High voltage compartment, Transformer and a Low/Medium voltage compartment.


The High Voltage end is constructed from 2.5mm sheet steel that has been fully folded and welded to a proven IP55 Design. Provision is made for explosion pressure relief and touch potentials are maintained via separate compartments for operating and metering voltages.


Transformers may be gas, liquid filled or dry type, ranging from 50kVA to 3MVA in various combinations of primary and secondary voltages dependent upon customer specific needs.


The Low Voltage end is also fabricated from 2.5mm sheet steel that has been fully folded and welded to a proven IP55 Design. The construction depends entirely on the customer’s requirements including any height or width restrictions. NEPEAN Power’s standard substation includes earth fault limitations provided on the star point of all secondary windings, with earth leakage tripping provided back to the H/T circuit breaker. Each outlet can be protected by moulded case circuit breakers, fuses and contactors, earth leakage protection, cable fault lockout protection, earth continuity, loss of vacuum, frozen contactor, overload, short circuit etc. ensuring all site personnel are working in safe conditions.


NEPEAN Power’s Substation includes a skid base that by default is constructed to a very robust and proven design ensuring they are capable of being towed or pushed into position in adverse conditions. The base is usually hot dipped galvanized and can be provided with towing bollards, floating axles, removable rubber wheels & fully plated bases to provide catchments of transformer oil.

Each Substation passes thorough inspection and test procedures to ensure it complies with the Australian Standards and has Mines Department Approval. A full electrical operational test is performed to ensure reliable operation and thus compliance with all the relevant Electrical Standards.

Our customers are supplied with Approval Documentation, copies of the electrical test reports and schematic drawings and Approvals for associated equipment.

If you would like more information on the NEPEAN Power Substations, please email