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High-voltage switchgears have been traditionally distinguished according to the medium used to extinguish the arc. In the case of the hybrid switchgear modules, this device developed during last 90’s uses two different types of technologies: one to extinguish the arc and the other to connect to the other equipment of the high voltage substation, for pursuing the goal of maximizing the ...
A switchgear may be a simple open-air isolator switch or it may be insulated by some other substance. An effective although more costly form of switchgear is the gas-insulated switchgear (GIS), where the conductors and contacts are insulated by pressurized sulfur hexafluoride gas (SF 6). Other common types are oil or vacuum insulated switchgear.
System for Automated Geoscientific Analyses (SAGA GIS) is a geographic information system (GIS) computer program, used to edit spatial data.It is free and open-source software, developed originally by a small team at the Department of Physical Geography, University of Göttingen, Germany, and is now being maintained and extended by an international developer community.
IEC TR 62063 High-voltage switchgear and control gear – The use of electronic and associated technologies in auxiliary equipment of switchgear and control gear IEC 62065 Maritime navigation and radiocommunication equipment and systems – Track control systems – Operational and performance requirements, methods of testing and required test ...
manual reset; local control; muting; response time; safety-related parameter(s) fluctuation, loss and restoration of power sources; Each safety function identified in the risk assessment is assigned a required Performance Level (PL r) based on the intrinsic risk determined through the risk assessment. The intrinsic risk is the risk posed by the ...
QGIS is a geographic information system (GIS) software that is free and open-source. [2] QGIS supports Windows, macOS, and Linux. [3] It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats. Its name comes from an abbreviation of its previous name, Quantum GIS.
GRASS has been under continuous development since 1982 [3] and has involved a large number of federal US agencies, universities, and private companies. The core components of GRASS and the management of integration of efforts into its releases was originally directed by the U.S. Army - Construction Engineering Research Laboratory (USA-CERL), a branch of the U.S. Army Corps of Engineers, in ...
DIVA-GIS is a free geographic information system software program used for the analysis of geographic data, especially species occurrence data. The software was first designed for application to the study of the distribution of plants, especially crop wild relatives such as wild potatoes .