Synthetic insulating member under mechanical stress with glass fibre reinforcement free of boron and boron compounds for high tension switching arrangements containing sulphur-hexafluorid gas

摘要

The resistance of insulating pieces made of fiberglass reinforced plastics against the decay products of SF6, such as occur within sealed high-voltage switching devices is unexpectedly enhanced by the use of a reinforcing fiberglass made of a low-alkali silicate glass containing neither boron nor boron-compounds.