%0 Journal Article %1 lambethnatural %A LAMBETH, P %A LOOMS, J %A ROBERTS, W %A DRINKWATER, B %D - %K Insulator Pollution Synthetic-insulating-materials Test Ultra-high-voltage %T NATURAL POLLUTION TESTING OF INSULATORS FOR UHV TRANSMISSION SYSTEMS %X The paper sets out' the criteria which are important in determining the size and general design of line an~d outdoor-substation UHV insulators for service in .polluted localities, and the problems which qre to be solved in producing and testing new kinds of insulators. A testing station in a marine-polluted site has been augmented to investigate insulator behaviour ,at a.c. system voltages up to 1.5 MV. The testing procedure involves automatic control of both test voltage qnd insulator length. The primary criterion' of performance is flashover and both insulator length and test voltage are adjusted as lashovers occur so as to derive the maximum information without stressing the "insuiators' unnecessarily highly. A number of retractable explosive fuse links on each insulator are used to give increases in length every time the insulator flashes over and the test voltage is automatically adjusted. To_ check for proportionality between flashover voltage and insulator length similar, insulators are also tested at lower volrages (250-400 kV system). Results are presented up to August 1973 for both line and sub-station UHV insulators including stayed posts of a new concept, and for polymeric insulat~rs with glass-fibre cores. These insulators are the out- .. ,. come of many years' development, of both materials and design, in the U.K.,an outline of which is presented.

@article{lambethnatural, abstract = {The paper sets out' the criteria which are important in determining the size and general design of line an~d outdoor-substation UHV insulators for service in .polluted localities, and the problems which qre to be solved in producing and testing new kinds of insulators. A testing station in a marine-polluted site has been augmented to investigate insulator behaviour ,at a.c. system voltages up to 1.5 MV. The testing procedure involves automatic control of both test voltage qnd insulator length. The primary criterion' of performance is flashover and both insulator length and test voltage are adjusted as [lashovers occur so as to derive the maximum information without stressing the "insuiators' unnecessarily highly. A number of retractable explosive fuse links on each insulator are used to give increases in length every time the insulator flashes over and the test voltage is automatically adjusted. To_ check for proportionality between flashover voltage and insulator length similar, insulators are also tested at lower volrages (250-400 kV system). Results are presented up to August 1973 for both line and sub-station UHV insulators including stayed posts of a new concept, and for polymeric insulat~rs with glass-fibre cores. These insulators are the out- .. ,. come of many years' development, of both materials and design, in the U.K.,an outline of which is presented.}, added-at = {2020-04-04T17:16:46.000+0200}, author = {LAMBETH, P and LOOMS, J and ROBERTS, W and DRINKWATER, B}, biburl = {https://www.bibsonomy.org/bibtex/243bdce6fe71f9556ad05cf40f160826e/ceps}, interhash = {a2b0247093fb7d32241680286dd6ff0f}, intrahash = {43bdce6fe71f9556ad05cf40f160826e}, keywords = {Insulator Pollution Synthetic-insulating-materials Test Ultra-high-voltage}, timestamp = {2023-12-21T15:03:51.000+0100}, title = {NATURAL POLLUTION TESTING OF INSULATORS FOR UHV TRANSMISSION SYSTEMS}, year = {-} }