Some infrastructure challenges sit outside the scope of standard construction and maintenance – high-voltage jointing across legacy and modern networks, digital substation commissioning, transformer diagnostics that determine whether a critical asset has years of life left or needs replacing now. Our specialist teams deliver the advanced technical work that sits behind safe, reliable networks.
Understanding what’s happening inside your cable network before it becomes an outage is where our diagnostic capability earns its keep. Our technicians use $300k+ purpose-built vehicles equipped with VLF, TDR, and partial-discharge testing to assess cable health and locate faults with pinpoint accuracy across LV through to 66kV networks – backed by over 20 years of experience and thousands of faults resolved across Aotearoa.
We deliver end-to-end transformer capability – from new unit assembly through to complex half-life refurbishments and fault response. Our mobile oil conditioning unit handles advanced treatment on your site without moving the asset, and our in-house dry-out oven and streamlining plant give us direct control over timelines and quality. We’re an approved installer for Hitachi (formerly ABB), Elsewedy Electric, and Tyree, with Hitachi certification for tap-changer servicing.
Getting new or upgraded infrastructure safely onto a live network demands precision at every stage. Our teams manage the full sequence from site acceptance testing through to energisation and sign-off –integrating primary plant, secondary systems, and protection and control as one coordinated programme.. That includes digital environments: we were among the first in New Zealand to deliver in-field IEC 61850 GOOSE and Sampled Value testing.
Cable terminations and transition joints demand precision and material knowledge that goes well beyond standard cable work. At distribution voltages, our specialists can connect legacy PILC cable to modern XLPE networks – a capability many contractors in New Zealand don’t carry. We deliver that same precision right through to 66kV across new builds and complex integration work, because network upgrades happen section by section while communities stay connected, and every joint between old and new infrastructure must perform reliably for decades.
Critical test equipment like Omicron relay test sets and high-voltage diagnostic instruments usually gets sent overseas for calibration, which means weeks without gear your teams depend on. Our lab handles it locally, with traceable calibration records and turnaround times that keep your testing programme on track. We also test and certify live-line PPE including gloves, sleeves, and insulated tools to verified safety intervals.
Request our Specialist Services Capability Statement – the technical detail on our testing, transformer, commissioning, and high-voltage jointing capability, ready for your evaluation team.
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Get in touch with our team to talk about planning, building, or maintaining your next infrastructure project.
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