End of life, failures, a site that outgrew its machine: a replacement is decided as much on the worksite as on the transformer. The method, from the nameplate to the removal of the old unit.
Nobody replaces a transformer "to see". Four situations dominate: end of life (a well-run transformer lives for decades, but the insulation ages inexorably), recurring failures that signal advanced ageing (see common failures), a power need that has outgrown the machine, and energy obsolescence: on a heavily loaded site, an old unit can lose in losses what a Tier 2 replacement would pay back within a few years.
The like-for-like reflex is reassuring but often sub-optimal: a replacement is the one chance to resize (the site has changed in twenty years), to move to today's loss levels, even to change technology, a cast resin dry-type where fire safety has grown in importance, an ester fluid where the environment demands it. The extra cost of thinking it through is zero: ask for both scenarios to be priced.
Everything starts with a sharp photo of the nameplate: power, voltages, vector group, impedance, year. Add three overview photos (footprint, connections, surroundings) and the dimensions of the pit or room. With that, a replacement can be priced without a visit; the special cases (civil works to redo, difficult access) show on the photos.
Our range lead times (15 to 18 weeks delivered) are made to be planned: the outage is set on the confirmed delivery date, not the other way round. For sites that cannot wait for a definitive machine after an incident, transitional solutions exist (rental unit, temporary sharing): raise it at enquiry stage, the arrangement takes preparing.
Removal does not end with the lift: a used transformer follows the professional WEEE route (oil, metals, possible pollutants in older units); the framework is summarised on EU compliance. The point to retain: traceability of the disposal protects the holder, keep the certificates. And while the fleet keeps running, the spare parts line covers the in-between years.
General method; each project is confirmed against the site survey, the applicable rules and the operator's requirements.
In the vast majority of cases, yes: nameplate photo + overview photos + room dimensions are enough for a firm quotation. A visit is only needed for genuinely atypical access configurations.
Not always: at equal or close power, modern footprints are often compatible. A change of technology (oil-immersed to dry-type) or an uprating can require it; that shows up at study stage, never mid-worksite.
Contact us with the nameplate: we look at the replacement machine and transitional solutions in parallel. The worst option is waiting; every drifting week ends up in the final schedule.
A used transformer follows the professional WEEE route (oil, metals, possible pollutants in older units). Traceability of the disposal protects the holder: keep the disposal certificates.