Characteristic equations of zinc oxide non-linear resistor

In order to find a V-I characteristic formula of ZnO nonlinear resistor that is suitable for engineering calculations,the resistance properties of ZnO nonlinear resistor were studied.The results show that there is a definite mathematical relation between the resistance of ZnO nonlinear resistor and the current,which can be expressed by "R-I characteristic formula",and from which the V-I characteristic formula satisfied engineering calculations can be deduced.The formula is successfully utilized in development of new product and design calculations of surge overvoltage protection.In addition,a few peculiar behavior of the nonlinear resistor also was reported.