High Voltage Services

Zinfra, HV TestingWe deliver a comprehensive range of engineering, construction, operations and maintenance solutions, across the gas, power, water and telco sectors.

Complete High Voltage Services Provider

A key part of delivering safe, reliable and high quality projects for our clients is our ability to provide end to end solutions for electrical construction and electrical testing and commissioning services.

Our nationwide team of HV construction experts, HV commissioning engineers and HV electrical technicians offers an extensive range of knowledge and experience within the power industry, and specifically in the construction and testing and commissioning of HV and LV plant and assets.

We offer a wide range of HV services including:

  • Electrical HV construction (primary and secondary)
  • Electrical HV testing (primary and secondary)
  • Electrical HV maintenance (primary and secondary)


We deliver these services across Queensland, South East Queensland, Gold Coast, Sunshine Coast and Brisbane and more broadly in Northern Territory and Western Australia.


Our full range of services includes:

Zinfra, HV Testing

Zinfra, HV Maintenance 

Zinfra, HV Commissioning 

Zinfra, HV Construction 

 HV Testing

 HV Maintenance

HV Commissioning 

HV Construction

  • Earth system testing (electrode resistance, soil resistivity, current injection and earth grid integrity)
  • Earth leakage protection devices
  • Transformer testing (oil testing (including DGA), ratio tests, vector group testing, and insulation resistance)
  • Switchgear (including busbars and circuit breakers)
  • Protection relays testing (including a wide range of vendor products) including statutory maintenance and calibration checks)
  • High potential testing (including VLF)
  • Tan-Delta testing (switchgear, busbars, circuit breakers, CT's and VT's and HV cables)
  • Diagnostic testing on switchgear, busbars and circuit breakers
  • Protection systems
  • Control systems
  • Transformers
  • Generation plants
  • CT's and VT's
  • Capacitor Banks

  • HV and LV switchgear
  • Transformers
  • AC and DC Drives
  • Protection systems
  • Control systems
  • Generation plants
  • CT's and VT's
  • Capacitor Banks

  • Construction and installation of high voltage switchrooms and switchyards (3.3kV to 500kV)

In House Tools and EquipmentZinfra, HV Testing
We successfully test and commission large High Voltage electricity infrastructure projects utilising our highly skilled and experienced in-house employees, together with the necessary in-house tools and equipment, including: 
  • Omicron CPC 100 primary test system
  • Omicron CMC 256 relay test system
  • Omicron CMC 356 relay test system
  • Omicron CT Analyser & CT SB2 Switchbox
  • VLF test set for cable integrity testing (VLF-12011CMF)
  • Phenix High potential equipment for dielectric withstand, IR and leakage current testing
  • Megger 200A resistance measurement system
  • CB-200 capacitance meter
  • Doble F6150 secondary test set for automated and manual single and three-phase secondary injection
  • A range of digital multimeters


Contact Us
Jason Maloney
M: 0419 026 691