Insulating Materials in High-Voltage Technology
Dimensioning an insulation system requires exact knowledge of the type, magnitude and duration of the electric stress while simultaneously considering the ambient conditions. But, on the other hand, properties of the insulating materials in question must also be known, so that in addition to the proper material, the optimum, e.g. the most economical, design of the insulation system can be chosen. A particular problem in this respect is that the determination of the properties of insulating materials is done with model samples under standardized conditions, so that extrapolation of these model values to real insulation systems is often not unconditionally possible. Added to this, many values of the properties of the insulating materials are subject to considerable statistical scatter so that dimensioning an insulation system must be done with appropriate safety margins.
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