For the construction of measuring transformers

Casting Resin Systems

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:

  • 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.)

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. 

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