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.
Witness testing is a fact of life. There is nothing like close proximity to increase awareness of a machine in both the customer and the factory organizations. A user's factory witness personnel commit to making critical decisions based on knowledge and experience. Motor manufacturers dedicate considerable effort and resources to ensuring that the customer is satisfied with the product testing. There...
Part III is an extension of the Part II testing effort, but with relay manufacturers providing, commissioning, and configuring the relays for the high-current test laboratory activities. Part III provides high-current testing laboratory results for multiple 50 kA and 63 kA tests involving several typical low-ratio switchgear CTpsilas (with typical burdens) and microprocessor feeder relay instantaneous...
Part I expressed concerns about using IEEE Standard C37.110-1996 (1+X/R) criteria for sizing current transformers (CT's) for feeder short-circuit conditions [1]. Part II introduces an overview of relay filter algorithms, and proposes responsibilities of the IEEE Power System Relay Committee (PSRC), operating company and engineering company electrical power engineers, CT manufacturers, switchgear manufacturers,...
Typical petroleum and chemical industry UPS (uninterruptible power supply) distribution systems are reviewed for interrupting device selectivity during short-circuit conditions. When selectivity is not achieved, alternative solutions are proposed. Distribution system selectivity comparisons are performed for standard circuit breaker panelboards, fuse panelboards and custom panelboards utilizing hydraulic-magnetic...
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.