Transformers are built to last — but over time, wear, ageing components, and outdated technology can reduce efficiency and increase the risk of failure. At Protrafo, we offer expert transformer revision and retrofit services that breathe new life into your existing assets. Our goal: extend operational life, improve performance, and avoid unnecessary replacement costs.
We start with a detailed assessment of the current condition of your transformer. This includes visual inspections, diagnostic testing, and evaluation of historical performance. Based on these findings, we create a tailored plan to repair, upgrade or replace key components such as bushings, tap changers, insulation, and cooling systems — all with minimal disruption to your operations.
In many cases, retrofitting your transformer with modern technology can significantly enhance reliability, monitoring capabilities, and energy efficiency. Whether it’s integrating modern protection relays, sensors, or replacing outdated components with current-generation alternatives — our retrofit solutions give your transformer the capabilities of a new unit at a fraction of the cost.
By partnering with Protrafo, you not only preserve your investment but also align your infrastructure with today’s standards. Our team ensures every revision and retrofit is performed to the highest safety and quality levels. With us, your transformers are ready for the demands of tomorrow — without replacing what already works.
We inspect and analyse your transformer inside and out — from insulation to load behaviour — to uncover performance bottlenecks and ageing components.
Critical parts like bushings, gaskets, tap changers or cooling elements are refurbished or replaced to restore your unit to peak condition.
We upgrade legacy systems with modern protection, monitoring, and automation — extending functionality without full replacement.
Every revised or retrofitted transformer is tested, validated and delivered with full reports, ready for safe reintegration into your grid.
Have questions about upgrading or refurbishing your existing transformer? We’ve listed the most common topics below — from timelines and testing to costs and compatibility — so you can move forward with clarity and confidence.
Cast resin (dry-type) transformers require minimal maintenance. Routine visual inspections, dust removal, and checking for signs of overheating or insulation wear are usually sufficient. Unlike oil-filled units, they do not require oil testing or leak monitoring, making them ideal for low-maintenance environments.
Transformer oil serves two key purposes: insulation and cooling. It insulates internal components to prevent electrical faults and helps dissipate heat generated during operation. High-quality mineral or synthetic oils, such as MIDEL, also enhance fire safety and extend transformer lifespan.
The typical lifespan of a transformer ranges from 25 to 40 years, depending on the type, load conditions, maintenance, and operating environment. With proper care and monitoring, such as using systems like Protrafo Insights®, transformers can operate reliably for several decades.
Repair lead times vary based on damage severity and parts availability. However, with our dedicated service team and stock of critical components, we can often provide rapid turnaround, including emergency interventions.
Yes, Protrafo provides on-site diagnostics and repairs where possible, including thermal imaging, insulation tests, and minor component replacement. For complex repairs, the transformer may be transported to our partner facilities.
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