The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2013
Filed:
Feb. 09, 2011
Ching-hohn Lien, Taipei, TW;
Jie-an Zhu, Shanghai, CN;
Zhi-xian Xu, Guishan Shiang, TW;
Xing-xiang Huang, Guishan Shiang, TW;
Ting-yi Fang, Guishan Shiang, TW;
Ching-Hohn Lien, Taipei, TW;
Jie-An Zhu, Shanghai, CN;
Zhi-Xian Xu, Guishan Shiang, TW;
Xing-Xiang Huang, Guishan Shiang, TW;
Ting-Yi Fang, Guishan Shiang, TW;
Abstract
A ZnO surge arrester for high-temperature operation is characterized in that a grain boundary layer between ZnO grains thereof contains a BaTiO-based positive temperature coefficient thermistor material, which takes 10-85 mol % in the overall grain boundary layer, and when operating temperature raises, the positive temperature coefficient thermistor material in the grain boundary layer has its resistance sharply increasing with the raising temperature, so as to compensate or partially compensate decrease in resistance of components in the grain boundary layer caused by the raising temperature, thereby making the resistance of the grain boundary layer in the ZnO surge arrester more independent of temperature. The ZnO surge arrester thus is suitable for operation where a maximum operating temperature is higher than 125° C., or even higher than 150° C.