Method and a system for determining the density of an insulating gas in an electrical apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 2, 1997
Grant Date -
N/A
app pub date -
Feb 7, 1996
filing date -
Feb 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and a system for determining the density of an insulating gas in electrical apparatus in the vicinity of parts carrying electrical current, the method comprising the following steps: a) a reference temperature is measured outside the apparatus and in the vicinity thereof; b) the current passing through the apparatus is measured, and the temperature rise of the gas above the reference temperature is determined on the basis of gas temperature rise values as a function of current values and of various reference temperatures, said temperature rise values having been previously determined by testing or by a mathematical model; c) the gas temperature is computed by adding the reference temperature and the temperature rise; d) the gas pressure inside the apparatus is measured; and e) the density .rho. of the gas is computed on the basis of equations of state of the gas .rho.=F(T,P) which equations are tabulated data.
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