REOIL
REOIL S
Transformer oil regeneration plant
REOIL S regenerates aged transformer oil in the smallest and most mobile unit in the line, built for smaller oil-filled transformers where space, speed, and mobility are critical. The same adsorption regeneration, sorbent reactivation, and sealed online operation as the larger units, in a compact, transportable plant.
- Adsorption regeneration restores aged oil to fresh-oil specification
- Removes acids, sludge, oxidation products, and corrosive sulfur
- Operates on energized transformers, sealed and automatic
- In-system sorbent reactivation, up to +300 cycles
Overview
What REOIL S does
REOIL S regenerates aged transformer oil. Over years in service, oil oxidizes: acids form, sludge builds, and corrosive sulfur attacks the transformer's internals. REOIL reverses that. High-capacity adsorption through bauxite columns removes the acids, sludge, oxidation products, and corrosive sulfur, and the oil is restored to fresh-oil specification rather than simply cleaned.
The sorbent is reactivated inside the unit and reused many times, so a single charge runs through hundreds of cycles before replacement. Combined with in-line dehydration and degassing, the process brings oil back to IEC 60422 and, in most cases, IEC 60296 for new mineral insulating oil. The unit runs on energized transformers, sealed and automatic, so regeneration happens without an outage and without oil loss.
For the chemistry of oxidation, acidity, sludge, and corrosive sulfur, and why regeneration restores oil rather than replacing it, see the Handbook of Transformer Oil Excellence.
Read the handbookApplication
Best suited for
REOIL S is the unit for smaller oil-filled transformers, from 1 to roughly 5 MVA, and for urban substations, renewable sites, switchyards, and remote installations where larger systems are impractical. It suits field service teams, utilities, and maintenance providers managing smaller transformers across distributed networks. For larger transformers and higher capacity, REOIL runs up to the L.
Specifications
Technical specifications
- Max. oil flow
- 1 000 l/h
- Adsorption columns
- max 6
- Dual bank
- No
- Max. oil capacity
- 10 000 kg
- Transformer range
- 1–5 MVA
- Integrated degassing
- Yes
Engineered to a different standard
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Adsorption regeneration
Acids, sludge, and oxidation products are removed through bauxite columns, restoring aged oil to fresh-oil specification rather than just cleaning it. The chemical decline that filtration and drying cannot touch is reversed.
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Sorbent reactivated in-system
The bauxite is reactivated inside the unit and reused, up to 300 cycles on a single charge. A long campaign runs without the constant media changes regeneration normally demands.
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Corrosive sulfur removed
DBDS and reactive sulfur taken below detectable levels, passing IEC 62535. The copper-sulfide attack that ages a transformer from the inside is stopped at the source.
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Sealed, online, no outage
Works on an energized transformer, sealed against oil loss. Regeneration happens on the asset, without an outage and without transporting oil off-site.
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Regeneration, not replacement
Aged oil is restored and goes back to work instead of being drained and burned. No waste oil to dispose of, no new oil to manufacture and ship. The most environmentally responsible thing a transformer oil can do is stay in service.
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Integrated drying and degassing
Dehydration and degassing run in line with the adsorption, so the oil leaves dry, degassed, and chemically restored in one process.
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Runs itself. Watches itself.
Fully automatic regeneration cycle under PLC control, with diagnostics and remote access. Manual controls are PLC-guarded, so the wrong move is blocked before it happens.
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Interlocked for every scenario
Alarms, sensors, and interlocks across every condition the cycle can meet. Designed to run safely, attended or unattended.
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Connected as standard
An integrated modem and on-board server push every reading to ekofluid.cloud. Your portal holds the full cycle history and the documentation. Log in and run the unit from any browser.
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Vacuum held to setpoint
The vacuum stage for degassing is regulated automatically, set and held by the PLC through the cycle, with no air drawn into the process.
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Configurable adsorption banks
Column count and bank layout are matched to the transformer, the oil volume, and the contamination state. One platform covers distribution assets to the largest power transformers.
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Mounted however the site needs
Lifting points, optimized dimensions, and rugged enclosures. Stationary at a workshop or mobile to the substation, built to be moved between sites for regeneration campaigns.
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Access designed in
Every valve reachable, every gauge readable, columns and service points laid out for the work. A dedicated review checks operator access on every build.
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Built to outlast the asset
Black steel, fully welded, dual-coated and baked. Built for continuous, large-scale regeneration work and decades of hard use, in the factory or in the field.
Get in touch
Discuss your REOIL S requirement
Every REOIL system is configured to the project — transformer size, oil volume, contamination state, site conditions, and control requirements. Tell us about your transformers and the engineering team will confirm the right configuration.