High-voltage engineering

We help deliver safe, resilient and authority-approved high-voltage solutions, reducing risk and avoiding redundant infrastructure.

With experience across healthcare, data centres, education, transport, defence and complex commercial developments, we combine network knowledge, practical optioneering and a solid understanding of how to work with authorities.

Our high-voltage design services

Due diligence & feasibility

• Network capacity assessment and connection optioneering
• Review of proposed designs and integration into existing authority networks
• Early identification of constraints, risks and compliance requirements
• Technology and infrastructure capability reviews.

Design

• Development of ETAP network models, including substations
• Protection coordination and settings calculations for personnel and
• equipment safety
• Arc flash modelling and risk assessment
• Integration of new HV assets into existing networks and technologies
• Preparation of relay test instructions for commissioning and testing
• Collaboration with multidisciplinary teams to increase buildability and keep
• the program on track.

Construction support

• Site supervision during testing and commissioning of protection schemes
• Technical support to contractors during installation and energisation.

Stakeholder engagement

• Liaison with supply authorities, project partners and contractors
• Management of approvals, reviews and authority interfaces
• Coordination with equipment suppliers and market-leading technologies.

Project insights

In-depth understanding of project requirements

For a major data centre project, we began by interrogating project requirements, program commitments and cost drivers before beginning authority negotiations.

By analysing load profiles and understanding network constraints early, we facilitated informed utility discussions, aligned expectations and supported a fasttrack delivery program.

Power continuity through staged delivery

At a major airport, we developed a carefully staged high-voltage upgrade that maintained uninterrupted supply to a live terminal. Through detailed investigation of existing infrastructure, temporary supply arrangements and substation reconfiguration, we delivered increased capacity and long-term resilience while ensuring operational continuity throughout construction.

Defining the brief where none exists

In a remote Samoan village, we’re supporting the delivery of high-voltage infrastructure with no clear design brief
or defined authority standards. By analysing limited existing information and reverse-briefing the client,
we’re guiding decisionmaking and developing a practical, resilient solution suited to local conditions.