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.
Water trees have been experimentally grown in high molecular weight, low density polyethylene when subjected to a constant dc stress. Two major types of trees have been observed; bushy trees (one-half of a bow tie) emanating outward from microvoids and larger water channels penciling inward from the perimeter or outward from the center conductor. The coaxial dielectric was subjected to an average...
In order to better quantize and understand water tree growth in polyethylene under a constant dc voltage stress, we have expanded on earlier work.1 The present study utilizes different polyethylene and a different electrode system. Both of these changes have affected water tree growth.
High voltage dc is applied to the center conductor of submarine telecommunication coaxial cables to power evenly spaced amplifiers.1 Typical systems installed thus far have powering voltages between 3 and 6 kV, with the outer conductor in contact with sea water. Although no problems with tree growth in the polyethylene insulation have been encountered, new systems presently planned will require higher...
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.