Transformer oil reclamation (regeneration) is a deep-cleaning process that goes well beyond simple filtration or dehydration: in addition to removing water and particulates it targets oxidation products, acids, sludge and other chemically altered breakdown products using adsorbents (e.g., Fuller’s earth or microporous sorbents), thermal treatment and vacuum degassing. The goal is to restore dielectric strength and other key electrical properties so the oil can be reused nearly to “as‑new” condition; some systems even allow in‑service treatment of transformer oil.

Filtration and dehydration primarily keep oil within acceptable operating limits by removing free water and solids, but they do not reverse chemical ageing. Reclamation chemically restores oil and therefore significantly extends fluid life, reduces frequency of full oil changes, and lowers disposal costs and environmental impact. For best long‑term results, reclamation should be part of a proactive condition‑monitoring program (DGA, BDV/TAN, interfacial tension, moisture) so treatment is scheduled before irreversible degradation occurs; reclamation equipment ranges from portable units for spot work to high‑throughput in‑plant systems with reactivatable sorbents for fleet maintenance.

Tan delta (dissipation factor) test evaluates dielectric health of windings, bushings, and insulation oil. It measures how much energy is lost as heat due to dielectric imperfections. High tan ? indicates moisture, aging, contamination, or partial discharge activity. Utilities rely on trend analysis and comparison with IEEE/IEC limits during maintenance and commissioning.

Power transformers handle transmission-level MVA and operate near rated load; distribution units serve LV loads and excel at part-load efficiency.

Maintenance involves inspections, oil sampling and DGA tests, insulation diagnostics, bushing checks, OLTC servicing, cooling system verification, partial discharge monitoring, thermographic surveys, grounding inspections, and trending of electrical parameters. The goal is to prolong service life and prevent unplanned outages.

The US-6S vacuum system is capable of achieving an operating vacuum around 1 mbar, which promotes rapid moisture evaporation even from deep insulation layers. Temperature control typically ranges from ambient up to about 120°C, enabling effective drying without damaging paper insulation. Automated systems regulate both parameters for controlled processing.

The TOR-5 does not dry only the oil in isolation – its main practical effect is the gradual reduction of moisture in the entire insulation system, including paper. Since moisture continuously migrates between oil and cellulose, drying the oil creates a concentration gradient that pulls water out of the paper over time. This is a slow equilibrium-driven process, but in long-term operation it leads to a real decrease of paper moisture content. It is not a fast regeneration method, but a continuous conditioning approach that stabilizes the whole insulation system.

Filtration units for bitumen lines are available with single or duplex housings and mesh sizes down to 200 microns. They ensure continuous operation without stopping production.

The CMM-1CF mobile oil station performs purification and transfer of insulating oil with 1 m³/h capacity. Please confirm voltage and destination country so we can send a quotation including transport cost.

Transformer oil filtration units remove moisture, gas, and particles from insulating oil to restore its dielectric strength. GlobeCore’s CMM units are trusted worldwide for fast, onsite purification – ensuring your transformer operates safely and efficiently.