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The energy absorbed from ultraviolet (UV) radiation affects some of the electrical characteristics such as leakage current (LC) on the surface of polluted silicone rubber (SiR) insulators, which may cause dry-band, arc discharge and loss of the unique characteristic of hydrophobicity, leading to material degradation in the form of tracking and erosion and/or flashover. This paper reports the results...
An extensive laboratory test program was used to investigate the performance of silicone rubber material samples of various grades when subjected to inclined-plane test conditions. In this paper, the leakage current and applied voltage waveforms were monitored and stored. The captured waveforms were then analyzed, and a number of parameters characterizing the waveforms (FFT, THD, power, energy, and...
This paper investigates the effect of nonlinear grading material in controlling the electric field stress on outdoor polymeric insulator. Excessive electric stress combined with contaminations and moisture are responsible for the surface arcing, which may results in insulator flashover. The electric field and potential distributions along the leakage path on the surface of the insulator were computed...
This paper describes the mechanical design, the software and hardware computer controls, and the measurement system used to construct the tracking wheel test facility as specified by the BS EN 62217:2006. The results of a long term test on polymeric insulators are also reported in the paper.
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