Method and apparatus for monitoring vacuum degree of vacuum in vacuum interrupter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 4, 2005
Grant Date -
Sep 18, 2003
app pub date -
Feb 7, 2001
filing date -
Dec 12, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Detection of degradation of the degree of vacuum in a vacuum interrupter suffers from poor sensibility because of mixed presence of various noises other than that due to discharge resulting from degradation The present invention allows accurate detection of degradation of the degree of vacuum by detecting the continuity of discharge produced between an electrode and a shield due to degradation of the degree of vacuum and the duration of discharge. The continuity of discharge is detected in accordance with a time slightly longer than 1 cycle time of a power-source voltage, and the duration of discharge is detected in accordance with a time sufficiently longer than 1 cycle time.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully