HV Testing and Maintenance for Mining, Resources and Heavy Industry

In mining, oil and gas, and heavy industry, unplanned downtime is extraordinarily expensive. A single transformer failure at a mine site or smelter can halt production lines costing hundreds of thousands of dollars per day. The resources sector demands HV service providers who can mobilise to remote locations, work within strict site safety protocols, and deliver testing outcomes that prevent equipment failures before they occur. Megavar provides specialist HV testing, commissioning, and maintenance services to mining operations, mineral processing plants, smelters, refineries, and heavy industrial facilities across Australia. Our engineers hold the site access requirements for major mine sites, including coal board medical clearances and mining inductions, and our test equipment fleet is fully mine-compliant.

Services for Resources and Mining

Shutdown maintenance: Planned maintenance programmes for scheduled site shutdowns, including transformer testing (oil analysis, winding resistance, insulation resistance, turns ratio), circuit breaker timing and contact resistance, protection relay maintenance and recalibration, and earth grid testing.
Commissioning of new installations: Full commissioning of new HV substations, switchrooms, and motor control centres at mine sites, processing plants, and industrial facilities. Our team integrates with your construction programme and safety systems.
Condition assessment and diagnostics: Transformer dissolved gas analysis (DGA), partial discharge testing, thermographic surveys, and insulation condition trending. These assessments help you make informed decisions about asset replacement, refurbishment, or continued operation.
Emergency fault investigation: Rapid mobilisation for fault investigation, root cause analysis, and repair coordination. Megavar’s engineers can diagnose complex HV faults and recommend remediation strategies to get your production back online.
Protection system upgrades: Replacement of legacy electromechanical relays with modern digital protection, including scheme redesign, settings calculation, and commissioning.

Remote and Regional Capability

Australian resource projects are often located in remote and regional areas, far from capital cities. Megavar has extensive experience working on remote sites across Australia, from the Bowen Basin and Pilbara to Tasmania’s west coast mining operations. Our teams are self-sufficient, bringing all required test equipment, PPE, and technical documentation to site. We understand the logistics of remote mobilisation and plan our work to maximise the value of every site visit.

Equipment for Resources Projects

Resources clients typically require Omicron CPC 100 systems for transformer and CT testing, Megger insulation testers and micro-ohmmeters for condition assessment, Megger TM1800 circuit breaker analysers, and AEMC earth resistance testers. All equipment is mine-compliant and available for hire alongside our commissioning services.

Frequently Asked Questions
for Resources and Mining

Can Megavar work on remote mine sites?

Yes. Megavar has extensive experience mobilising to remote and regional mine sites across Australia. Our engineers hold the necessary site access requirements including coal board medicals and mining inductions, and our equipment fleet is fully mine-compliant.

Does Megavar provide shutdown maintenance planning?

Yes. Megavar works with your maintenance and operations teams to plan HV testing scope within scheduled shutdown windows. We sequence our testing activities to maximise the value of de-energised time and provide comprehensive test reports within agreed timeframes.

What diagnostic services does Megavar offer for ageing HV assets?

Megavar offers transformer dissolved gas analysis (DGA), partial discharge testing, insulation resistance trending, circuit breaker timing analysis, and thermographic inspection. These diagnostic services help you assess asset condition and make informed decisions about maintenance, refurbishment, or replacement.

How quickly can Megavar respond to an HV fault?

Megavar can mobilise engineers for emergency fault investigation from our offices in Tasmania, South Australia, and New South Wales. Response times depend on location, but for most mainland sites we can have engineers on their way within 24 to 48 hours. Call 1300 730 499 for urgent assistance.

Does Megavar work with smelters and processing plants?

Yes. Megavar provides HV maintenance and commissioning services for smelters, refineries, mineral processing plants, and heavy industrial facilities. Our experience includes work at Alcoa Portland aluminium smelter and other major industrial operations requiring specialist HV expertise.

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