Description of a complex test programme for the evaluation of outdoor ageing-relevant properties of silicon rubber

The paper deals with a research project, aimed at both, the selection of test procedures for evaluation of polymers and of a Silicon Rubber (SR) for composite hollow insulators for outdoor service use. The investigations are focused on the validation of the ageing resistance at simultaneous voltage and pollution layer stressing. To take account of the dynamic behaviour of SR, standardized and non-standardized procedures are applied to improve the transferability of the test results to the performance under outdoor conditions. The test procedures are discussed with corresponding results. The investigated SR-types were RTV2- and LSR-sytems