High Voltage & Level 3 Services


Chamber and Padmount substations, high voltage transmission line works, 33kV-132kV, street lighting, network undergrounding, site provisioning services

High Voltage & Level 3 Team

Prior to the official launch of our Level 3 team in 2010, JHA’s electrical team was already well versed in nominating substation & location requirements as part of the services design. From this base, JHA expanded and formed our own dedicated division, specialising in Authority and infrastructure design.

Since then, our Level 3 team has been recognised by clients and supply authorities to be reliable, professional and committed to maintaining quality in design.

Our Level 3 group has expanded to provide multiple associated services, such as:

  • Earthing Studies
  • Padmount/Kiosk substations
  • Solar farm network integration
  • Sydney Rail works
  • Private HV networks
  • Private transformer networks
  • Authority Negotiation – Ausgrid – Endeavour – Essential – Energex
  • 11kV-22kV Distribution design
  • 33kV-132kV Transmission design
  • Chamber substations
  • Network undergrounding
  • Non-standard chamber arrangements
  • HVAC Customer systems
  • New subdivision services allocation
  • Roadway lighting inclusive of major arterial routes
  • Mini chambers
  • Major site provisioning
  • SCADA systems
  • Protection studies
  • Zone substation feeder augmentation