INSULATING OIL PROCESSING
To improve the quality of your transformer oil
REACH THE OPTIMUM OIL QUALITY WITH
DEGASSING, FILTERING AND DRYING
Does your oil analysis recommend a more economical solution for processing insulating oil rather than full oil regeneration? Or would you like to have your new transformer filled with insulating oil with modern and quality assured equipment? With our Mobile Processing Units (MPU) we can reliably fill your on-site transformers or degas, filter and dry your transformer oil during operation.
Thanks to the EOS® Service Units (MPU) of different sizes, the Electrical Oil Services experts can easily cover individual needs – regardless of whether the transformers are small, large or difficult to access or are used offshore.
Learn more about our mobile oil treatment units in our blog:
→ EOS® has Europe's largest fleet
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WHEN IS THE MOST APPROPRIATE TIME FOR AN INSULATING OIL PROCESSING?
When a transformer is filled for the first time with new unused insulating oil, the acidity neutralisation figure will be <0.01 mgKOH/g. As the transformer ages, the action of heat and oxygen results in the oil oxidising as the oil’s “natural” inhibitors are depleted. Polar compounds in the transformer oil such as acids and earlystage sludge can be produced. It is these complex compounds which attack the transformer paper insulation, leading to weakening of the insulation and an inability to withstand closeup faults and through faults. Once the paper is damaged it cannot be repaired.
| EOS® recommendation: Ensure that your transformer oil is analysed regularly and conduct a cost-efficient insulating oil processing at the earliest stage possible, when acidity levels rise. |
After repair and maintenance: Insulating oil processing is effective and reliable against physical contamination
After repair and maintenance: Insulating oil processing is effective and reliable against physical contamination
Vacuum pumps carry out the drying process at a pressure level of less than 1 mbar and evacuate dissolved gases and water vapour so that the transformer oil regains its original quality. The process includes degassing, filtering and drying.
Before commissioning a new transformer: Insulating oil processing allows a flawless and safe start from the beginning
Before commissioning a new transformer: Insulating oil processing allows a flawless and safe start from the beginning
During the manufacturing process of a transformer, oil and paper absorb moisture from the environment. This must be removed in several stages and under vacuum before the transformer is put into operation. The procedure corresponds to the treatment used for repairs or maintenance.
HOW WE WORK
Insulating oil processing after repair and maintenance - effective and reliable against physical contamination
Vacuum pumps carry out the drying process at a pressure level of less than 1 mbar and evacuate dissolved gases and water vapour so that the transformer oil regains its original quality.
Filling new transformers - flawless and safe from the start
During the manufacturing process of a transformer, oil and paper absorb moisture from the environment. This must be removed in several stages and under vacuum before the transformer is put into operation. The procedure corresponds to the treatment used for repairs or maintenance.
EOS® BEST PRACTICE
Find out more about our work on these pages:
Steel production
Almost like NEW - investing in 20 neglected transformers
Objective: Ensure reliable production by extending transformer lifetime
Solution: EOS® insulating oil regeneration
Step-by-step deep cleaning for twenty 66 kV transformers
Combined heat and power (CHP) plant
Remove potentially corrosive sulphur from 230,000 litres of transformer oil
Objective: To remove the additive from the 1990s called DBDS
Solution: EOS® insulating oil regeneration
A total of 50 days of thorough deep cleaning to reduce the DBDS content from 100 ppm to <5ppm
Energy supplier
Extend the service life of transformers by 15 years without high investments
Objective: To deep-clean the insulating oil systems and to remove acids and sludge
Solution: EOS® develops refurbishment strategy for insulating oil regeneration during operation
Start of an era: Making sustainable asset management for transformers possible
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Grid operator
Filling a 132 kV transformer after maintenance work
Objective: Remove contamination and achieve maximum dryness of the insulating oil
Solution: EOS® insulating oil processing
Restore safety with the Mobile Processing Unit (MPU) after warning message
Distribution system operator
Finding a solution when the newly ordered transformer is delivered late
Objective: Put the decommissioned transformer back into operation
Solution: EOS® insulating oil treatment
Drying the oil in the old transformer with extensive vacuum/heat treatment
Transformer OEM
Although stored in a dry atmosphere for a long time, the new transformer need to be installed in gas and steam turbine (CCGT) power plants
Objective: To generate a vacuum of less than 1 mbar at low cost and then fill the transformer with insulating oil
Solution: EOS® Mobile Vacuum Unit (MVU) and Mobile Processing Unit (MPU)
Enable cost-effective transformer installation
Steel production
Which transformer first? Prepare a professional transformer management system
Objective: Organise monitoring for each individual transformer at the production site to avoid failures
Solution: EOS® develops customised test procedure for regular sampling
Classify transformers according to importance for scheduled transformer oil analyses
Large power plant
Replace a 275 kV generator transformer and store the insulating oil temporarily
Objective: To store the company's own transformer oil for later re-filling into the new transformer
Solution: EOS® combines Mobile Processing Unit (MPU) and laboratory services with tanker lorries and storage tanks
Oil transport and storage off-site including consistent oil quality monitoring
Aluminium company
Sustainably remove 150,000 litres of insulating oil from decommissioned factory
Objective: Remove the insulating oil from the transformers and save the oil
Solution: EOS® organises and monitors the draining of the insulating oil in order to recycle it
Recycling of transformer oil: Collecting the used oil, improve the quality and return the oil to the market as recycled insulating oil
Distribution grid operator
25,000 litres of insulating oil from the main tank of a 132 kV transformer temporarily stored on site
Objective: To repair tap changers in an ecologically sensitive area and put them back into operation quickly after filling
Solution: EOS® insulating oil processing after interim storage of the transformer oil in an oil-rinsed, certified tanker truck
Insulating oil storage and 2-fold circulation directly and promptly on site
EOS® TRUSTED PURITY BLOG
As a specialist für recycled and new insulating oils as well as comprehensive transformer services, we offer you in-depth expertise – short, concise and to the point.
