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The classical reduced air-density model resulting from an increase in temperature affirms the degradation of the dielectric strength under such conditions. This paper discusses the effect of fire on air as a gaseous insulator acting between adjacent HVDC poles and between the poles and the ground plane. Laboratory experiments were conducted using the rod-rod gap configuration up to a maximum of 50...
Pole-top fires may occur on woodpole structures of electrical distribution networks because of leakage current flowing over the insulators and thereafter onto or into the wood of the structure. These fires may be severe enough to burn through the wooden cross arm or pole. Various local and international researchers have conducted work in this regard. However, further work was found to be necessary...
The integrity of the insulation of overhead power lines is an important factor in view of safety, particularly in the context of live line maintenance. Where broken glass disks need to be replaced under energized conditions, the reduction in the withstand strength will dictate the approach towards live line techniques to be applied. Initial findings from the electric field modeling of a glass insulator...
Open-circuit potential (OCP) measurements with zirconia-based sensors have been used for several decades in the metals industries to determine the oxidation state of high-temperature melts. Although amperometric techniques are known to provide additional kinetic and compositional analysis of the system, they have not been utilized by the metals industries to the same extent. In this work, three different...
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