Dr.sc.techn. Wolfgang Hauschild is engaged in the development of high-voltage testing and measuring systems at HIGHVOLT Prüftechnik Dresden GmbH, and is also a lecturer at Dresden Technical University. He studied electrical engineering at Dresden TU from 1960 to 1966 and was then assistant to Prof. Dr.-Ing. F. Obenaus at the Institute for High Voltage Engineering. From 1970 to 1980 he was senior assistant to Prof. Mosch (heading a work group on SF6 insulation), and from 1976 to 1977 he was visiting reader at Damascus University. Dr. Hauschild received his doctorate for investigations into discharge phenomena in insulating oil, and for work on breakdown in the insulating gas sulphur hexafluoride. He has twice been awarded the Order of the Banner of Labour, First Class.Prof. Dr.-Ing.habil. Wolfgang Mosch spent a period as assistant and senior assistant to Prof. Dr.-Ing. F. Obenaus at the Institute for High Voltage Engineering and gained his doctorate in 1958 for work on the behaviour of power arcs in a natural magnetic field. From 1960 to 1968 he was engaged at the 'Hermann Matern' VEB Transformer and X-ray Works in Dresden as Chief Engineer and Technical Director. In 1968 he was appointed Senior Professor of high-voltage engineering at Dresden TU. From 1971 to 1973 he was Director of the Electrical Engineering section and from 1973 to 1977 he was Vice-Chancellor at Dresden TU. In 1978 Prof. Mosch was appointed Dean of the Faculty of Electrical Engineering and Electronics. He has twice been awarded the Order of the Banner of Labour, First Class.