The surface flashover is an especial failure type under multiple simulated lightning impulse current tests, in the test current amplitude range.
When multiple impulse voltages are injected, the charge enhancement near the joined edges of a ZnO varistor and metal electrodes plays a decisive role on the surface flashover or breakdown initiation and developments.
Therefore, in order to insulating design of HTS cable termination, this paper will report on experimental investigations of the surface flashover characteristics under various surface length and GFRP thickness in the atmospheric air, transformer oil, LN2 at atmospheric pressure and complex condition.
Among the dielectric technology, surface flashover characteristics are studied with several simplified spacers at the structural aspects.
This paper addresses the problems, connected with calculation of the electric field and analysis of surface flashover of node tank SF6 circuit breaker.
The outdoor ceramic insulators of power transmission lines and transformers are suffering from the problem of contamination due to which surface flashover phenomenon is frequent.
The insulator surface between two electrodes placed 50 μm apart, successfully held voltages of over 3 kV without surface flashover.
For the development of electrical insulation design of a HTS transformer with Z continuous winding, we have discussed insulation composition and investigated breakdown characteristics such as breakdown of LN2, polymer and surface flashover on FRP and breakdown-surface combination in LN2.
This chapter provides an overview on the effects of nanoparticles on the SiR. Experiments are designed to analyze how nanoparticles influence the surface charge accumulation and DC flashover characteristics in Section 14.2, thermal conductivity and resistance to erosion in Section 14.3 and treeing process in Section 14.4.
There are four main impacts arising from ash-contamination of apparatus used in the power delivery process: Wet deposits of ash on high voltage insulators can initiate a leakage current (small amount of current flow across the insulator surface) which, if sufficient current is achieved, can cause 'flashover' (the unintended electrical discharge around or over the surface of an insulating material).
