Japan High-performance Zinc Oxide Arrester

Specifications: The Surge Arrester block implements a highly nonlinear resistor used to protect power equipment against overvoltages. For applications requiring high power dissipation, several columns of metal-oxide discs are connected in parallel inside the same porcelain housing.

The nonlinear V-I characteristic of each column of the surge arrester is modeled by a combination of three exponential functions of the form The protection voltage obtained with a single column is specified at a reference current (usually 500 A or 1 kA).

Default parameters k and given in the dialog box fit the average V-I characteristic provided by the main metal-oxide arrester manufacturers and they do not change with the protection voltage. The required protection voltage is obtained by adding discs of zinc oxide in series in each column.