Title :
Development of Advanced Built-In Surge Arresters for Distribution Systems with New Zinc-Oxide Elements
Author :
Hama, M. ; Ishizaka, H. ; Shimizu, J. ; Nishiki, S. ; Kaku, I.
Author_Institution :
Mitsubishi Electric Corp., Amagasaki, Japan
Abstract :
New zinc-oxide elements with a varistor voltage about twice that of conventional ones have been developed by reducing the ZnO grain size with a new additive, which enables to halve the series number of elements in metal oxide surge arresters. Using these elements, we have developed advanced built-in surge arresters enclosed in 6.6 kV pole transformers and switchgear. The advanced arresters have been reduced in volume by 25% compared with conventional ones. This paper describes the specification and construction of the advanced arresters and the results of various evaluation tests.
Keywords :
Arresters; Circuit breakers; Equations; HVDC transmission; Sociotechnical systems; Sulfur hexafluoride; Surges; Switches; Switchgear; Voltage; Zinc-oxide elements; metal oxide surge arrester; pole switchgear; pole transformer;
Journal_Title :
Power Engineering Review, IEEE
DOI :
10.1109/MPER.2001.4311568
