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Air Flow Measurements During Medium-Voltage Load Current Interruptions

Abstract

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.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 192918

Language

English

Affiliation

  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Elkraftteknologi

Year

2015

Published in

Plasma Physics and Technology

ISSN

2336-2626

Volume

2

Issue

1

Page(s)

83 - 87

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