The arrester consists of ZnO tablet placed inside ceramic tube. Electrodes are connected to the end tablets.

Given: Relative permittivity of the air ε = 1.
Relative permittivity of the ceramic ε = 2.
Relative permittivity of ZnO element ε = 60.
Conductivity of ZnO element - nonlinear.
Nominal voltage U_{0} = 35 kV.
Maximal current I_{max} = 520 A.
Surge peak voltage U_{max} = 200 kV.

Problem: Calculate the varistor current.

Solution:

Results: The arrester can be represented by the equivalent schema with resistor R and capacitance C connected in parallel.

At nominal voltage the arrester acts as a capacitance (I_{C}>I_{R}). At overvoltage (surge) I_{R} prevails and arrester acts like a resistor. QuickField can calculate both active (I_{R}) and reactive (I_{C}) currents.

There are no restrictions applied to the QuickField Student Edition postprocessors.
You can view field maps, make plots, calculate integrals and print pictures in the same way that the Professional Edition users do.