Every transformer manager knows the feeling: a critical unit is showing signs of moisture ingress or gas buildup, and the options on the table are either costly downtime for a full overhaul or crossing your fingers that it holds. Neither is good enough for a piece of infrastructure that can cost millions to replace.

That's exactly the gap the HERING TIDO® Series fills. These online transformer insulation drying and degassing systems continuously extract moisture and dissolved gases from energized transformers — no shutdown, no interruptions, no guesswork.

Transformer insulation failure rarely happens overnight. It's a slow process driven by three compounding factors: moisture, temperature, and oxygen. Of these, moisture is the most destructive and the hardest to control once it takes hold.

When moisture builds up in transformer insulation paper, it accelerates chemical aging and reduces dielectric strength. Dissolved gases — byproducts of oil and insulation degradation — compound the problem, increasing the risk of arcing and unexpected breakdown. Left unchecked, this chain reaction leads to expensive failures, unplanned outages, and in worst cases, fires or explosions.

Replacing or repairing a transformer's paper insulation means taking the unit offline, which is both costly and operationally disruptive. The smarter approach is preventing the degradation from reaching that point in the first place.

The TIDO® is a continuous, non-intrusive online transformer drying system. It connects directly to an energized transformer and uses a vacuum process to draw moisture and dissolved gases out of the transformer oil. Once the oil is dried and degassed, a concentration gradient forms between the now-dry oil and the still-wet insulation paper — and this gradient drives water steadily out of the cellulose insulation, where the TIDO® removes it continuously, around the clock.

The result is measurable, sustained transformer moisture removal from both the oil and the solid insulation, without ever touching the insulation directly or requiring the transformer to be de-energized.

This is fundamentally different from a one-time oil purification. The HERING EOK® Series handles that initial cleanup — and once that's done, the TIDO® takes over as the long-term maintenance solution, keeping moisture and gas levels in check over the full operational life of the transformer.

The TIDO® Series isn't a quick fix — it's a long-term investment in transformer health. Here's what it delivers:

• For new transformers: moisture content and gas levels stay below factory specifications from day one. The insulation never gets a chance to degrade early.
• For older or moisture-laden transformers: continuous drying over several months brings water content down to acceptable levels and can extend service life significantly — units that might have been headed for replacement get more useful years of operation.
• For operators who can't afford downtime: the TIDO® works on energized transformers just as effectively as on de-energized ones. Zero disruption to grid operations or industrial processes.

The hardware is built to match its purpose. High-quality steel piping, components from Western brand manufacturers, multiple safety features, and a robust design engineered for long service life — all made in Germany. Optional monitoring features including temperature, moisture, and transformer condition tracking give maintenance teams real-time visibility into asset health.

If you manage power transformers in a utility, industrial plant, mining operation, or data center environment, the TIDO® is worth a hard look. It works on both vacuum-rated and non-vacuum-rated transformers, and the system is configurable to match your specific requirements.

Operators managing aging fleet assets face the most immediate upside. Many transformers in service today are running well past their original design life. The TIDO® gives you a cost-effective tool to manage aging insulation and extract more value from infrastructure that would otherwise be expensive to retire and replace.

Utilities and industrial operators running high-criticality units also benefit from the proactive approach — catching insulation degradation before it shows up as a fault, rather than reacting to failures that cost far more to resolve.

Transformer failures rarely give you enough warning to act. By the time moisture or gas levels appear in routine diagnostics, the degradation process is often already well advanced. The HERING TIDO® Series is designed to prevent that — working continuously in the background so your transformers stay healthy, your operations stay uninterrupted, and your maintenance budget doesn't take an unexpected hit.

Whether you're protecting a brand-new unit or trying to extend the life of an aging asset, the TIDO® Series delivers a proven approach to long-term transformer insulation preservation that keeps your equipment running when it matters most.

Media Contact: 
Contact: Company Name: Hering VPT 
Contact Person: Detlev Bastek 
Email: info@hering-vpt.de 
Phone: +49 9831 8834666 
Address: D-91550 Dinkelsbuhl,Ernst-Schenk-Str.10 
Country: German