"GAS INSULATED SWITCHGEAR AND METHOD FOR DETECTING ARC DAMAGE IN A GAS INSULATED SWITCHGEAR PART"
Application 2143/DEL/2007 published 2008-08-01, filed 2007-10-11
The invention provides a gas insulated switchgear, and a method for detecting arc damage in a part used in a gas insulated switchgear, which detect directly when an electric contact or a peripheral part reaches an initially set wear limit. An insulating nozzle of a circuit breaker contains a marking substance that releases a gaseous substance inside a circuit breaker gas container as a result of wear by an arc. For ensuring heat resistance and insulation properties, the insulating nozzle is ordinarily formed of a fluororesin,.but in the present invention, it is formed of the ordinarily used fluororesin having uniformly mixed therein, as the marking substance, a chlorine-containing resin which has excellent heat resistance and insulation properties such as polyvinylidene chloride. No. of Pages : 25 No. of Claims : 12
Applicant
1)KABUSHIKI KAISHA TOSHIBA
:1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN. Japan
Inventor
1)YUKIO KANAZAWA 2)MASAHIRO HANAI 3)HIROSHI FURUTA
International Info
Classification: H01H33/18; H01H33/20; H02B13/02
Priority Information
2006-279218 Japan 2006-10-12