Title :
Development of advanced built-in surge arresters for distribution system with new zinc-oxide elements
Author :
Hama, Mitsunori ; Ishizaka, Hideaki ; Shimizu, Junichi ; Nishiki, Susumu ; Kaku, Isao
Author_Institution :
Mitsubishi Electr. Corp., Amagasaki, Japan
fDate :
10/1/2001 12:00:00 AM
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 halving of the series number of elements in a metal oxide surge arrester. 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; grain size; power distribution protection; power transformer protection; switchgear protection; varistors; zinc compounds; 6.6 kV; ZnO; ZnO grain size; built-in surge arresters; distribution system; metal oxide surge arrester; pole switchgear; pole transformers; varistor voltage; zinc-oxide elements; Arresters; Grain size; Lightning; Surges; Switchgear; Testing; Transformers; Varistors; Voltage; Zinc oxide;
Journal_Title :
Power Delivery, IEEE Transactions on
