The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Fig.1 shows a tipical current trace for Kapton with a negative point. The symbols ON, OFF and Bin this figure correspond to the onset of voltage applicatin, the start of voltage reduction and the time of the actual breakdown current onset, respectively. The first large current pulse which occurs just after voltage onset is the combination of injection current and displacement current. The prebreakdown...
The penetration of energetic electrons into materials is an important fundamental process which is useful in understanding radiation effects, such as crosslinking, and also in evaluating damaging effects from charge accumulation such as in spacecraft charging. While energy deposition is well known by traditional dose measurement methods, there is relatively little experimental information about net...
The electrical failure of practical oil insulated apparatus often develops as a surface flashover along the interface of a solid dielectric support and the oil. While there is substantial reported information about breakdown and streamer propagation in plain oil gaps, there is little comparable information about the surface flashover case. The studies reported here concern measured surface flashover...
An Investigation of electrode surface effects has indicated that surface defects are a major cause of non-ideal performance of large gaps used in SF6 gas. A discharge inception model with a sensitivity analysis demonstrates that realistic size surface irregularities can initiate failures that compare well with test measurements. Also, a method to treat area effects by using surface statistics has...
Insulator surfaces in gases collect charge when the rate of charge arrival exceeds the rate of conduction by the insulator from the surface region. The source of the collected charges may be in close proximity to the surface, and hence greatly influenced by the surface. Alternately, the source may be remote so that it supplies charges independent of the surface accumulation. For the latter arrangement,...
Inorganic insulators are often necessary, especially when elevated temperatures are encountered o Ceramics generally exhibit low volume insulation strength compared to more homogeneous materials and are relatively costly, whereas glasses are typically lossy and prone to low voltage breakdown under ac. A specialty glass prepared with a very low alkali metal content has been studied as a potential bulk...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.