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- Switchgear abstract "In an electric power system, a switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgears are used both to de-energize equipment to allow work to be done and to clear faults downstream. This type of equipment is directly linked to the reliability of the electricity supply.The very earliest central power stations used simple open knife switches, mounted on insulating panels of marble or asbestos. Power levels and voltages rapidly escalated, making opening manually operated switches too dangerous for anything other than isolation of a de-energized circuit. Oil-filled equipment allowed arc energy to be contained and safely controlled. By the early 20th century, a switchgear line-up would be a metal-enclosed structure with electrically operated switching elements, using oil circuit breakers. Today, oil-filled equipment has largely been replaced by air-blast, vacuum, or SF6 equipment, allowing large currents and power levels to be safely controlled by automatic equipment incorporating digital controls, protection, metering and communications.The high-voltage switchgear was invented at the end of the 19th century for operating motors and other electric machines. The technology has been improved over time and can now be used with voltages up to 1,100 kV.Typically, switchgears in substations are located on both the high-voltage and low-voltage side of large power transformers. The switchgear on the low-voltage side of the transformers may be located in a building, with medium-voltage circuit breakers for distribution circuits, along with metering, control, and protection equipment. For industrial applications, a transformer and switchgear line-up may be combined in one housing, called a unitized substation or USS.".
- Switchgear thumbnail Switchgear_HV.jpg?width=300.
- Switchgear wikiPageExternalLink index_tc17.html.
- Switchgear wikiPageExternalLink 227-0122-00-handouts_2.pdf.
- Switchgear wikiPageExternalLink The_basic_functions_of_LV_switchgear.
- Switchgear wikiPageExternalLink switchgear.
- Switchgear wikiPageID "1561900".
- Switchgear wikiPageRevisionID "604197151".
- Switchgear hasPhotoCollection Switchgear.
- Switchgear subject Category:Electric_power.
- Switchgear subject Category:Electric_power_infrastructure.
- Switchgear subject Category:Electric_power_systems_components.
- Switchgear type Abstraction100002137.
- Switchgear type Cognition100023271.
- Switchgear type Component105868954.
- Switchgear type Concept105835747.
- Switchgear type Content105809192.
- Switchgear type ElectricPowerSystemsComponents.
- Switchgear type Idea105833840.
- Switchgear type Part105867413.
- Switchgear type PsychologicalFeature100023100.
- Switchgear comment "In an electric power system, a switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgears are used both to de-energize equipment to allow work to be done and to clear faults downstream.".
- Switchgear label "Appareillage électrique".
- Switchgear label "Quadro elettrico".
- Switchgear label "Schaltanlage".
- Switchgear label "Switchgear".
- Switchgear label "Распределительное устройство".
- Switchgear sameAs Schaltanlage.
- Switchgear sameAs Appareillage_électrique.
- Switchgear sameAs Switchgear.
- Switchgear sameAs Quadro_elettrico.
- Switchgear sameAs m.05bkp1.
- Switchgear sameAs Q15141485.
- Switchgear sameAs Q15141485.
- Switchgear sameAs Switchgear.
- Switchgear wasDerivedFrom Switchgear?oldid=604197151.
- Switchgear depiction Switchgear_HV.jpg.
- Switchgear isPrimaryTopicOf Switchgear.
