Moisture from breathing and paper
Water enters through the conservator and gaskets; the paper releases more as it warms.
Transformer And Insulating Oil
Transformer oil filtration and moisture removal, online
Water attacks both jobs transformer oil does, cooling and insulating. A permanently mounted unit removes it as fast as it enters.
What goes wrong
Falling breakdown voltage
Dielectric strength falls as water and particles rise; the test lab flags it.
Particles from ageing parts
Cellulose fibres, oxidation sludge and tap changer metal all circulate.
Outages just for oil treatment
An outage just to treat the oil is costly and hard to schedule.
The cost of transformer failure
A failed transformer is among the most disruptive losses on a network, and replacements take months.
The business caseWhat we fit
Sizing follows from the rating, oil volume and your last test report.
Online filtration and drying unit
Permanently mounted, low flow, running with the transformer energised.
Insert grade for insulating oil
Media specified for dielectric service, not standard hydraulic media.
Trending against test results
The unit is tracked against your existing oil test reports.
Project Profile
Power transformer, in-service oil treatment
Water content and breakdown voltage worsening every year despite annual mobile treatment. A permanent online unit stopped the rise; the annual outage came off the plan.
A typical project: customer not named, figures indicative. Verified site data available on request.
Case studies
Before
After
Common questions
Is it safe with the transformer energised?
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Yes, when the equipment is designed for it and installed properly, agreed with your operations team.
How does this compare with a mobile vacuum treatment?
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Our unit is a Desorber, not a vacuum plant. It warms the oil to 70 degrees C and passes cold dry air against it, which carries the water away, so there is no vacuum and no boiling. A vacuum plant is faster in one campaign; a fitted Desorber holds the number down all year.
Will it remove dissolved gases?
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No, gas removal is a vacuum process. If DGA results are the concern, that is a different job.
Technical Enquiry
Request a transformer oil assessment
Send water content, breakdown voltage and transformer rating. We will advise whether online treatment will hold the values.
- We reply within one working day.
- We size the unit for your tank and oil, not from a catalogue.