Can Midel ester fluids heal existing insulation problems in a transformer?
No. MIDEL fluids cannot “regenerate” insulation materials.
Degradation of the solid cellulose insulation in transformers (insulation ageing) is irreversible. Thermal ageing of cellulose materials cannot be avoided – however it can be slowed.
Retrofilling transformers with MIDEL fluids, can have a positive impact on the issue of paper ageing, delivering:
Longer life for cellulose insulation at standard temperatures
The option to run transformers at a higher temperature for standard lifetime
The benefit of a higher power output or a smaller footprint by running transformers hotter
Using MIDEL ester transformer fluids can potentially extend the life of cellulose insulated transformers. Alternatively, transformers can be operated at a higher temperature with MIDEL fluids, while retaining the same lifetime they would have had with mineral oil at standard temperature.
More questions on ester fluids?
This post is one of the 15 top questions we get asked on retrofilling transformers with ester fluids. Here is the full list of the frequently asked questions on ester fluid retrofilling: