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High voltage

Powering what’s next – safely, precisely, and without delay. From 3.3kV to 330kV, PHE High Voltage delivers with control.

Precision-led HV solutions for critical infrastructure

division impact

PHE High Voltage operates in power-critical environments across mining, utilities, power generation, and heavy industry. Clients trust our team to deliver safely in regional, remote, and live operating conditions across Australia. With a delivery reach spanning 3.3kV to 330kV, we bring the technical depth and capability needed for both end-to-end delivery and urgent fault investigation.

We control every aspect of HV delivery through in-house diagnostic tools, testing equipment, and specialists trained across gas-insulated switchgear, ring main units, and all major insulating mediums. This level of control ensures our high voltage electricians bring precision, confidence, and consistency to every connection. 

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Specialist delivery for high-risk systems

PHE High Voltage provides specialist services across HV installation, jointing, switchgear upgrades, transformer commissioning and protection integration. We deliver across substations, critical plant infrastructure, and complex underground and overhead systems.

With factory acceptance testing/site acceptance testing, partial discharge testing and post-repair validation integrated into our delivery, we work efficiently through every project stage – from design and installation to testing and energisation. Our team brings the systems thinking, technical rigour and site-readiness required to restore or deliver power infrastructure at scale.

High Voltage
Capabilities
From termination to testing, our High Voltage team provides end-to-end capability for complex power systems – spanning substations, critical infrastructure, and high-risk environments. We work across greenfield and upgrade scenarios, supporting utility, mining and energy clients with technical precision, fast mobilisation and a deep understanding of Australian standards.
HV cable design & installation
HV terminations & commissioning
Switchgear installation & retrofits
Transformer testing & commissioning
HV system operational testing
Secondary & primary injection testing
Protection settings & programming
Substation automation & control
Earthing compliance & lightning protection
FAT/SAT, VLF & PD testing
Thermographic & insulation testing
Thermographic & insulation testing
FAT/SAT, VLF & PD testing
Earthing compliance & lightning protection
Substation automation & control
Protection settings & programming
Secondary & primary injection testing
HV system operational testing
Transformer testing & commissioning
Switchgear installation & retrofits
HV terminations & commissioning
HV cable design & installation