Title :
Effect of the air pressure on the commutation delay of magnetically driven arcs across a gap or a stop in one of two parallel electrodes
Author :
Yan, Wei ; Cheng, Li-chun
Author_Institution :
Dept. of Electr. Power Eng., Huazhong Univ. of Sci. & Technol., Hubei, China
Abstract :
Research on the effect of the air pressure on the commutation delay of magnetically driven arcs across a gap or a step in one of two parallel electrodes has been conducted using high-speed photography and an optical fiber microcomputer system. The experiments were carried out on different kinds of electrode material, such as brass, copper (cold cathode), and graphite (hot cathode). It is shown that the commutation delay of cold-cathode arcing caused by step or gap on the electrode at low air pressure is directly related to the air pressure and polarity air pressure. A discussion on the experimental results is presented.<>
Keywords :
arcs (electric); C; Cu; CuZn; air pressure effects; arcs in air; cold cathode; cold-cathode arcing; commutation delay; electrode material; experimental results; gap between electrodes; graphite; high-speed photography; hot cathode; low air pressure; low-pressure air; magnetically driven arcs; optical fiber microcomputer system; polarity air pressure; step in electrode; Cathodes; Conducting materials; Copper; Delay effects; Electrodes; Magnetic materials; Microcomputers; Optical fibers; Optical materials; Photography;
Conference_Titel :
Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/HOLM.1988.16109
