High-Voltage Apparatus and Systems

High-voltage research and development activities cover a wide area of devices and systems. Main emphasis is given to the different types of high voltage insulating systems used in electrical machines and devices e.g. · high-voltage power and instrument transformers · rotating high voltage machines · high-voltage cables and overhead lines · bushings and outdoor insulation · switchgears and connectors · gas insulated systems Dielectric diagnostics and monitoring of insulating components as well as of entire high-voltage power components. There are a lot of specific test facilities for life-time tests (simultaneous ageing under electrical and thermal stressing) as well as for voltage tests of large high-voltage transformer components and oil/paper insulating systems (vacuum drying and degassing). R & D deals additionally with improved high-voltage test procedures and devices (e.g. calibration of high-voltage dividers).