Transformer Field Repair Services
Transformer problems can lead to oil loss, reduced performance and unexpected outages when they are not addressed promptly. MVA provides on-site transformer repair and maintenance services to help utilities, power generation sites and industrial facilities restore equipment, improve reliability and extend asset life.
Our experienced field service technicians can evaluate equipment conditions, identify the source of the problem and complete repairs at your facility. From correcting leaks and processing insulating oil to replacing damaged components, MVA provides the expertise and equipment needed to keep critical power systems operating.
Comprehensive On-Site Transformer Repairs
MVA performs a wide range of external and internal transformer repairs. Each project is planned around the condition of the equipment, site requirements and the customer’s operational schedule.
Our transformer field repair capabilities include:
Transformer Leak Detection and Repair
Oil leaks can affect transformer performance, create environmental and safety concerns and indicate deteriorated gaskets, seals or components. Our technicians investigate the source of the leak and determine the appropriate corrective action.
Transformer leak repair services may include:
- Leak source investigation
- Gasket and seal replacement
- Welding and specialized leak repairs
- Flange and connection repairs
- Bushing and component sealing
- Oil level restoration and processing
When more extensive work is required, MVA can provide complete transformer regasketing services.
Vacuum Dehydration and Transformer Dry-Out
Moisture can reduce the dielectric strength of transformer insulation and accelerate the aging of insulating paper. MVA provides vacuum dehydration and dry-out services to remove moisture from the transformer’s solid insulation and internal environment.
Depending on the equipment condition and project requirements, our team can develop a controlled dry-out process designed to improve insulation condition before the transformer is filled and returned to service.
Transformer Oil Degasification and Processing
Contaminated insulating oil can compromise transformer performance and reliability. MVA uses mobile oil-processing equipment to remove dissolved gases, moisture and other contaminants from transformer oil at the jobsite.
Oil processing may be performed as part of a repair, installation, retrofill or ongoing maintenance project. Oil samples can also be tested before, during and after processing to help confirm fluid condition and evaluate the effectiveness of the work.
Pump and Component Replacement
Aging or damaged transformer components can affect cooling, operation and overall reliability. MVA technicians can remove and replace pumps and other external or internal components as part of a planned repair or outage.
Our capabilities include:
- Transformer oil pump replacement
- Current transformer (CT) replacement
- Cooling system component replacement
- Bushing replacement
- De-energized tap changer switch repair or replacement
- Damaged insulation replacement
- Additional mechanical and electrical component repairs
Our team can also inspect related equipment and connections to identify additional concerns while the transformer is out of service.
Breaker Assembly, Repair and Maintenance
In addition to transformer repairs, MVA provides field support for high-voltage circuit breakers. Our technicians can assist with breaker assembly, inspection, maintenance and repair during new installations, planned outages and equipment upgrades.
Coordinating transformer and breaker work through one experienced field service provider can help simplify project planning and reduce the number of contractors required at the site.
Transformer Expertise From Diagnosis Through Repair
MVA combines transformer field service experience with in-house oil diagnostic capabilities. When testing is needed, our laboratory can evaluate the condition of the insulating fluid and help identify evidence of overheating, electrical activity, moisture, insulation deterioration or other developing concerns.
This combined approach gives customers access to both diagnostic insight and the field capabilities needed to act on the findings. Our team can help determine the scope of work, complete the necessary repairs and provide testing to support return-to-service decisions.
Planned and Responsive Field Support
Whether the work is part of a scheduled maintenance outage or a response to an unexpected equipment problem, MVA develops a repair plan based on the asset, operating conditions and project priorities.
We support transformers across a wide range of voltage classes and applications, including utility substations, power generation facilities and industrial power systems. Our goal is to complete each project safely, efficiently and with careful attention to the long-term reliability of the equipment.
If you have a leaking transformer, degraded insulating oil, a damaged component or another equipment concern, MVA can help determine the appropriate next steps.
