Oil-filled transformer testing & maintenance
Not sure of the condition of your transformer?
Wildwood Power performs detailed testing and analysis of oil-filled transformers to identify developing issues before they become critical failures. From dissolved gas analysis to insulation testing and oil sampling, our team helps facilities maintain reliable transformer performance and extend equipment life.
Most facilities have questions before they’re ready to request a study. We’re available to talk through your situation and tell you exactly what’s needed.
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Your Transformers Are Critical Infrastructure
Early testing helps prevent failures, outages, and costly equipment damage
Oil-filled transformers operate continuously under electrical and thermal stress. Over time, insulation materials degrade, gases form in the oil, and internal faults can begin developing long before they become visible.
Many facilities only discover these issues after performance problems or outages occur.
Common challenges we see:
- Uncertainty about transformer health
- Lack of recent oil analysis data
- Unexpected overheating or load issues
- Aging insulation systems
- Limited documentation for maintenance planning
Routine transformer testing helps identify early warning signs so maintenance decisions can be made proactively instead of reactively.
Thorough Testing. Reliable Results. Built for Critical Equipment.
Transformer testing requires careful analysis, accurate data collection, and proper interpretation. Our process focuses on detailed diagnostics that help facilities understand the true condition of their equipment.
Comprehensive Oil Analysis
Oil sampling provides valuable insight into the internal condition of transformers. Tests such as dissolved gas analysis help identify insulation breakdown, overheating, and developing internal faults before they cause failure.
Electrical Testing & Insulation Evaluation
We perform electrical testing to evaluate insulation integrity and transformer performance. These tests help detect degradation, moisture contamination, or winding issues that may affect reliability.
Clear Documentation & Condition Reporting
Testing results are compiled into clear reports that help your team understand transformer condition and plan maintenance accordingly.
Documentation can support maintenance planning, reliability programs, and asset management decisions.
What Transformer Testing May Include
Transformer testing evaluates both the electrical condition of the equipment and the health of the insulating oil. These tests help identify developing problems, confirm proper installation, and support long-term equipment reliability.
Dissolved Gas Analysis (DGA)
DGA evaluates gases dissolved in transformer oil to detect internal faults such as overheating, insulation degradation, or electrical arcing.
Thermal & Load Evaluation
Thermal analysis helps identify overheating conditions that can accelerate insulation aging and reduce transformer lifespan.
Insulation Testing
Insulation resistance and related testing methods evaluate the condition of internal insulation systems and detect moisture or degradation.
Oil Quality Testing
Oil testing helps determine contamination levels, moisture presence, and dielectric strength to ensure the insulating oil continues to perform properly.
Used for Both Existing Transformers and New Installations
Transformer testing supports both ongoing maintenance programs and new equipment commissioning.
Facilities commonly perform these tests when:
- Commissioning newly installed transformers
- Evaluating aging equipment
- Performing routine maintenance
- Troubleshooting performance concerns
- Documenting equipment condition for asset management
When Testing Reveals a Problem, We can Repair it
Testing often uncovers issues that need to be corrected. Wildwood Power also performs key repairs to keep oil-filled transformers in service; we address problems found during inspection without the need to bring in a separate contractor.
Seal Repair
Oil leaks from failing gaskets and seals are one of the most common transformer problems. We repair seals to stop leaks, prevent moisture intrusion, and protect the insulating oil from contamination.
Bushing Replacement
Bushings are a frequent point of transformer failure. We replace worn or damaged bushings to restore safe operation and reduce the risk of flashovers, leaks, and unplanned outages.
Oil-Filled Transformer Testing & Repair FAQs
Most facilities perform oil analysis annually or as part of a predictive maintenance program.
DGA identifies gases produced by insulation breakdown and electrical faults inside transformers.
We do both. Along with testing and diagnostics, we perform repairs such as seal repair and bushing replacement to address issues identified during inspection.
Testing can identify developing issues early so maintenance can be scheduled before major equipment damage occurs.
Ready to talk through your facility's situation?
Reach out to discuss your equipment and testing needs.