HV Testing and Commissioning for Construction Contractors and EPCs
Construction contractors and EPCs face a common challenge on high-voltage projects: you need a specialist commissioning team that can mobilise quickly, work independently, and deliver compliant test results without disrupting your construction programme. Whether you are an EPC delivering a turnkey substation, a head contractor managing an electrical balance of plant package, or a D&C contractor on a transmission augmentation, the quality of your HV commissioning partner directly affects your programme, your handover documentation, and your reputation with the asset owner.
Megavar works as a dedicated commissioning subcontractor to construction teams across Australia. Our 60+ engineers and technicians integrate with your site team, follow your safety and quality systems, and deliver testing and commissioning outcomes that satisfy both your internal requirements and those of the network service provider or asset owner.
Why Contractors Choose Megavar
Megavar is not a labour hire company sending bodies to site. Every commissioning engineer deployed on your project has hands-on experience across protection relay testing, transformer commissioning, circuit breaker testing, and SCADA integration. Our team brings their own calibrated test equipment, pre-built inspection and test plans, and an understanding of what asset owners expect to see in the handover package.
We operate under your project management framework while maintaining technical independence. This separation matters: when Megavar signs off that a protection scheme is correct, asset owners trust the result because we were not involved in the design or construction. This independent validation model accelerates grid connection approvals and reduces defect lists at handover.
Services for Construction Contractors
- HV substation commissioning: Full pre-commissioning and commissioning of transformers, switchgear, protection relays, CTs, VTs, busbars, and earthing systems up to 275kV and above.
- Protection relay testing: Secondary injection testing of all major relay manufacturers including ABB, Siemens, SEL, GE, and Schneider. IEC 61850 GOOSE messaging and end-to-end scheme validation.
- SCADA integration and testing: Point-to-point SCADA verification, RTU configuration, and integration with DNSPs and TNSPs.
- Commissioning management: Commissioning planning, ITP development, commissioning schedules, and coordination with network operators for energisation.
- Test equipment supply: If your team needs equipment rather than personnel, Megavar hires specialist HV test equipment from our national fleet, with technical support from engineers who use it daily.
Relevant Project Types
- Transmission substation construction and augmentation (66kV to 275kV+)
- Wind farm and solar farm electrical balance of plant (EBoP)
- BESS projects from 50MW to 500MW+
- Distribution substation upgrades and zone substation builds
- Industrial HV installations for mining, processing, and manufacturing
Equipment Commonly Deployed
On construction projects, Megavar typically deploys Omicron CMC 356 and CMC 500 relay test sets, Omicron CPC 100 primary test systems, Megger DLRO and insulation testers, AEMC earth testers, and Megger TM1800 circuit breaker analysers.
Explore our full equipment hire fleet at megavar.com.au/equipment-rentals or call 1300 730 499 to discuss your project requirements.
Frequently Asked Questions
for Construction Contractors and EPCs
Can Megavar work under our project management and safety systems?
Yes. Megavar routinely integrates with contractors’ project management systems, safety management plans, and quality frameworks. Our team completes your site inductions, follows your SWMS, and reports through your commissioning management structure. We bring technical independence while operating within your project governance.
What voltage levels does Megavar commission?
Megavar commissions HV assets from 11kV distribution substations through to 275kV and above transmission substations. Our experience covers the full range of voltage levels found on Australian construction projects, including 22kV, 33kV, 66kV, 110kV, 132kV, and 220kV.
Does Megavar provide commissioning management or just testing?
Both. Megavar can supply individual commissioning engineers to work within your team, or we can take full responsibility for commissioning management, including ITP development, commissioning planning, scheduling, and coordination with network service providers for energisation approvals.
How quickly can Megavar mobilise to site?
Megavar operates from four offices across Australia: Cambridge and Launceston in Tasmania, Adelaide in South Australia, and Newcastle in New South Wales. For most Australian projects, we can mobilise commissioning engineers within one to two weeks of receiving a confirmed scope and schedule.
Can we hire test equipment without commissioning personnel?
Absolutely. Megavar maintains a national fleet of specialist HV test equipment available for short and long-term hire. Unlike other rental companies, our hire service includes technical support from commissioning engineers who use the equipment daily. Visit our equipment hire pages or call 1300 730 499.
Need High Voltage Testing or Equipment?
Talk to our engineers about your project requirements.
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We’re incredibly excited to share a big milestone in Megavar’s story—we’ve officially opened our new Newcastle branch, located at 22 Gavey Street, Mayfield,
