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Switchgear Devices Author: Prof Ian Cotton Added on Mon Oct 30 13:00:00 GMT 2017 Duration: 0:15:30 Start by watching this film that discusses air, air blast, SF6 and vacuum based switchgear technologies. The design of a circuit breaker is as complex mechanically as it is electrically so this film only covers the very basic issues associated with the design of practical switchgear devices.  

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