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- Title
Impulse Breakdown Voltages of Triggered Multistage Vacuum Gap.
- Authors
Itagaki, Koichi; Ali, Mortuza; Kitamura, Hiroshi; Maruyama, Takeo
- Abstract
Several sealed-off triggered vacuum gaps are connected in series to improve hold-off voltage. The characteristics of impulse breakdown voltage of these series-connected gaps are investigated experimentally. The sum hold-off voltage of series-connected gaps decreases to a unit hold-off voltage when the maximum value of voltage division ratio across the gaps increases to unity. Self-breakdown probability of the series-connected gaps is always higher than that of a single gap under the same conditions. Hence, stage efficiency of the multistage gap decreases with increasing number of stages. Its value is 90 percent with 2-stage gap and 75 percent with 5-stage gap, respectively, under the same voltage division ration and the same gap length (2.0 mm) in each stage. Triggered breakdown voltage of 2- or 3-stage gap is several hundred volts when all gaps are triggered simultaneously at the peak of the main impulse wave and a working voltage range is nearly 100 percent in this case. The working voltage range decreases with number of stages. Its value is 45 percent with 3-stage gap and 15 percent with 5-stage gap, respectively, when one triggered gap is fired for switching.
- Subjects
ELECTRIC power systems; VOLTAGE regulators; ELECTRIC controllers; ELECTRIC conductivity; ELECTRIC breakdown; ELECTRIC discharges
- Publication
Electrical Engineering in Japan, 1992, Vol 112, Issue 2, p1
- ISSN
0424-7760
- Publication type
Article
- DOI
10.1002/eej.4391120201