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.
Over-potential or hipot tests have been applied for many decades to rotating machine windings to assure that the electrical insulation in windings is fit for service. Hipot tests are used universally as acceptance tests for new windings. However, a rotating machine maintenance engineer often faces plant managers reluctant to approve hipot tests. The managers ask, `Do hipot tests damage rotating machine...
Failure of the insulation in distribution-class metalclad switchgear may release large amounts of energy resulting in an explosive hazard to adjacent equipment and personnel. Many such failures have occurred in older outdoor and generating station switchgear within Ontario Hydro. The failures have often been caused by partial discharge (PD) activity and surface tracking which destroy organic bus support...
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.