Retrofilling involves replacing mineral oil insulating fluid with MIDEL in an existing transformer. There is no need to move the transformer, the retrofilling procedure can be carried out in-situ.
The ideal MIDEL fluid will depend upon your transformer design and location. As a MIDEL service partner PBA can help you with your selection, and will provide you with information about the environmental and cost benefits of using MIDEL ester fluids in your installation.
- MIDEL eN 1215 is a versatile, fire-safe ester transformer fluid made from renewable soybean crops. Environmentally safer than mineral oil. MIDEL eN 1215 has a pour point of -18C and delivers excellent performance in non free-breathing transformers in temperate climates.
- MIDEL eN 1204 is a superior natural ester transformer fluid, made from renewable rapeseed/canola oil. It delivers very effective cold weather performance (-31°C pour point) and has better oxidation characteristics than soya-based natural ester fluid. The right solution for non free- breathing transformers in cooler climates.
- MIDEL 7131 is the world’s leading biodegradable synthetic transformer fluid. Proven to 433kV and with a pour point of -56°C, this is a robust fluid for mainstream and the most demanding environments – including extremes of heat or cold, sub-sea, underground, offshore wind and traction applications – for both sealed and free-breathing units.