Title :
A multistress test procedure for qualification of composite insulation materials in GIS
Author :
Kutil, A. ; Frohlich, K.
Author_Institution :
Inst. of Switchgear- and High Voltage Technol., Tech. Univ. Wien, Austria
Abstract :
A multistress test procedure for composite polymer insulation materials as they are used in gas insulated systems (GIS) is introduced. Tube materials are dielectrically and mechanically stressed simultaneously. In a power frequency ac field up to 120 kV/cm partial discharge (PD) patterns are recorded by means of phase resolving and statistical evaluation of PD impulses. First results show a significant dependence of the PD activity on mechanical stress conditions. Also two distinctive modes of PD impulse levels were observed which seem to be related to the interface between fibres and matrix. A qualitative assessment of different materials concerning their aging behaviour seems to be possible, however. For quantification a comparison with endurance tests is necessary and thus planned in the near future
Keywords :
ageing; composite insulating materials; fibre reinforced composites; gas insulated switchgear; insulation testing; life testing; partial discharges; switchgear testing; GIS; aging behaviour; composite insulation materials; endurance tests; gas insulated systems; mechanical stress conditions; multistress test procedure; partial discharge; phase resolving; polymer insulation materials; power frequency ac field; statistical evaluation; switchgear insulation; tube materials; Dielectric materials; Dielectrics and electrical insulation; Gas insulation; Insulation testing; Materials testing; Partial discharges; Plastic insulation; Polymers; Qualifications; System testing;
Conference_Titel :
Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1942-7
DOI :
10.1109/ELINSL.1994.401468
