Repairs and Upgrades
A refurbished transformer can run for decades more. It makes economic sense and supports sustainability.
Every repair and upgrade starts with a thorough condition assessment.
We always start with a thorough assessment of what has happened, what can be reused, and what the different options will cost – compared to investing in a new transformer. You get a clear recommendation with technical justification, so you can make an informed decision.
Understand the Condition – Make the Right Call
Winding Replacement and Repair After Failure
If the paper is too degraded, or a winding failure has occurred, replacing the windings – and often the core – is the next step. In practice, this gives you a transformer with new electrical characteristics, in many cases with increased capacity, while the tank, cover, and conservator are reused.
Troubleshooting and Diagnosis
We start with a thorough review: visual inspection, electrical measurements, and oil analysis. DGA reveals the type of fault; electrical measurements pinpoint it. You get a clear status description and a concrete recommendation.
Winding and Insulation Repairs
We can make new primary and secondary windings, replace paper insulation, and insulate the fluid during a repair.
Repair of Bushings and Switchgear
We replace defective bushings and repair associated high-voltage components in switchgear.
Treatment of the insulating liquid
After a fault, the oil can be contaminated by particles or degraded materials. We can drain and filter the existing insulating liquid, or refill with new insulating liquid.
Testing and Documentation
All repaired and upgraded transformers go through the same final inspections according to IEC standards as our newly produced transformers. We deliver a test report after testing.
Upgrades – meet new demands without buying new
Many transformers in Norwegian grids are 30–50 years old. They are robust – but they are not sized for what the grid demands today. Higher power demand, new connections, and stricter energy efficiency requirements can make an upgrade a better choice than buying new.
Capacity Increase
By switching to a different type of insulating liquid, you can increase the transformer’s capacity by 10–15%.
Environmental Upgrade
For transformers in sensitive areas – near drinking water, protected nature reserves, or densely populated zones – we can switch to natural ester oil (FR3), which is 99% biodegradable and has high fire safety.
Workshop and Capacity
Do you have a transformer that needs repair, refurbishment, or an upgrade?
We handle repairs and upgrades at all our service centers. We collect, repair, and return – and coordinate temporary replacements if needed, so you avoid long production downtime while the work is in progress.
As the manufacturer, we have the expertise, equipment, and specialists you need to get this done right.
Service Center Sykkylven
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Service Center Kløfta
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