Baygal® / Baymidur® casting resin systems containing mineral fillers have been used for more than 35 years for high-grade solid insulation in current and voltage transformers.
These polyurethane casting resins have proven themselves with:
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- high electrical resistance up to 70 kV
- excellent dynamic characteristics
- high accuracy through low shrinkage
- excellent durability
- low production costs
- compatibility with other insulating materials (paper, rubber, SF6, etc.)
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Polyurethane systems for solid insulation are processed by vacuum gelation and pressure gelation in two-component casting machines.
The choice of process depends on criteria such as the type of transformer and the number required, and the same machine may be used for both processes.