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Suppressing Arc Development by Arc‐Extinguishing and Lightning‐Protection Device
Author(s) -
Yan Renbao,
Wang Jufeng,
Nie Yonghui,
Li Zijian
Publication year - 2020
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23028
Subject(s) - arc (geometry) , arc flash , electric arc , electrical engineering , airflow , arc blow , ampere , arc fault circuit interrupter , impulse (physics) , engineering , insulator (electricity) , mechanics , acoustics , current (fluid) , voltage , mechanical engineering , physics , electrode , arc welding , submerged arc welding , quantum mechanics , welding , short circuit
When a transmission line is struck by lightning, or a power‐frequency flashover of insulator strings occurs, arc‐extinguishing and lightning‐protection devices can effectively save the insulators from cauterization caused by power‐frequency arcs and can quickly break the transient arc after a device is struck by an impulse flashover. The working principle of arc‐extinguishing and lightning‐protection devices is that the device can instantly produce a jet airflow and the arc will be extinguished in its initial phase itself; thus, the arc is suppressed thoroughly. In other words, the air blast extinguishes the arc when its current is only a few amperes, and, ideally, there is no arc at all. The earlier the jet airflow acts on the arc, the better the arc‐extinguishing effect. The proposed theory of the arc‐extinguishing and lightning‐protection device is experimentally verified. Photos from a high‐speed camera demonstrate the thorough inhibition effect of the high‐speed jet airflow on the arc. The time during which the arc is extinguished is about 7 ms, and the arc is not regenerated. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.