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Electrical Breakdown Characteristics of Nitrogen and Air at Cryogenic Temperature in a Quasi-uniform Electric Field by Yotaro Akamine; Shigeyasu Matsuoka; Masakuni Chiba; Kunihiko Hidaka is a Engineering article available to read on EtoBox.

What is Electrical Breakdown Characteristics of Nitrogen and Air at Cryogenic Temperature in a Quasi-uniform Electric Field about?

The breakdown voltages of the longer-gap configurations in gaseous nitrogen and air that are necessary in designing superconducting electrical power apparatuses are measured at temperatures of 293 and 93 K. The quasi-uniform electric field made by a sphere-to-sphere electrode with a diameter of 150 mm and a gap length of about 10 to 100 mm is used in the measurement of the breakdown voltages. When 50-Hz ac and dc voltages are applied to the sphere-to-sphere gap, the breakdown voltages in nitrogen and air obey Paschens law even at cryogenic temperatures (93 K). When a 1.4/50-Ps lightning impulse voltage is applied to the gap, the 50% breakdown voltage of nitrogen also obeys Paschens law under UV irradiation of the cathode electrode. However, the breakdown voltage in air at 93 K is higher in the case of lightning impulse voltage applications, and the delay from impulse voltage application to breakdown occurrence is apparently longer at 93 K than at 293 K.

Who reads Electrical Breakdown Characteristics of Nitrogen and Air at Cryogenic Temperature in a Quasi-uniform Electric Field?

Author

Yotaro Akamine; Shigeyasu Matsuoka; Masakuni Chiba; Kunihiko Hidaka

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0424-7760)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)