Refurbishment is ideal when the core structure is still in good condition, but components like insulation, bushings, tap changers, or oil need renewal. It becomes cost-effective when replacement cost is significantly higher and downtime can be minimised through refurbishment.
Common refurbishment actions include:
Replacing or drying insulation
Oil purification or complete oil change
Upgrading bushings and seals
Servicing or upgrading tap changers
Cleaning and recalibrating cooling systems
Repainting and corrosion protection
A standard refurbishment can take from a few days to several weeks, depending on the size of the transformer, extent of damage, and availability of parts. On-site refurbishments are generally faster compared to workshop-based rebuilds.
Yes. A professionally done refurbishment can extend the operational life by 10–20 years by restoring efficiency, improving thermal performance, and eliminating faults caused by ageing components.
Yes—provided it is refurbished to certified standards and passes all post-refurbishment tests, including insulation resistance, oil dielectric strength, thermal performance, and load testing. A certified report should accompany the unit for compliance and safety assurance.
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