Air Flow Measurements During Medium-Voltage Load Current Interruptions
Journal article, Peer reviewed
Date
2015Metadata
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- Institutt for elkraftteknikk [2474]
- Publikasjoner fra CRIStin - NTNU [38294]
Original version
Plasma Physics and Technology 2015, 2(1):83-87Abstract
Air has been considered a good alternative to SF6 as arc quenching medium for load break switchgear at medium voltage ratings. In this work, the air flow characteristics and influence from the electric arc have been studied for typical currents and over-pressures. The cooling air velocity is typically in the range 150 - 200 m/s and thus well below supersonic speed. The arc and the surrounding hot air severely affect the air flow pattern by causing clogging in the contact and nozzle region.