Surge arrestor history
1965: success in fabrication of silicon carbide varistors by R&D group of Panasonic company in Japan for protection against impulse voltages November 1965: taking the…
The effect of granule grading distribution on electrical properties of zinc oxide varistor
Zinc oxide varistors are semiconductor ceramics which have excellent nonlinear electrical properties due to the grain boundaries and their microstructures. Theoretically, finer granules with a…
Increase of energy absorption capability of zinc oxide varistors via variation of sintering direction
Zinc oxide varistors are semiconductor ceramics which have nonlinear properties due to the grain boundaries and their varistor-type microstructures. In this paper, the effect of…
The effect of organic binder on electrical properties of zinc oxide surge arrester
Zinc oxide surge arrestors include a column of zinc oxide varistor semiconductor ceramics which are completely insulated in the normal state of network and they…
Improvement of electrical properties of zinc oxide varistor by alteration of sintering temperature
Zinc oxide varistors are semiconductor ceramics which are caused by grain boundaries and microstructure of varistor. In this paper, the effect of sintering temperature on…
Regeneration of zinc oxide varistors by immersion in nano bismuth nitrate solution
Decrease of voltage-current characteristics of varistor has been discussed as a serious problem in surge arresters. Prolonged exposure of varistor to electrical field increases the…