In practice, the effectiveness of these methods often depends not only on the principle itself, but also on how they are combined and applied in real operating conditions. Turbine oils usually degrade gradually, so maintenance teams are increasingly looking for solutions that can work continuously or be integrated into routine service without long shutdowns. Another important factor is the ability to handle multiple contamination types at once — for example, moisture, dissolved gases, and aging by-products — rather than addressing them one by one with separate equipment.

This is why integrated oil purification units have gained attention in recent years. They are designed as complete systems, where several purification stages are arranged in a single process flow, making oil treatment more predictable and easier to control. The photo below shows an example of such a turbine oil purification unit, illustrating how these technologies are implemented in an industrial setup rather than just in theory.

In my opinion, the TOR-80 is the best tester for determining the breakdown voltage of transformer oil. I have seen it in operation, and I can say that the level of process automation is impressive.