Impedance spectra of ZnO varistor type 440 model O ver. 68

The impedance spectrum of high-voltage ZnO varistor obtained using FRA EIS impedance spectrosocpy measurement method. The 1V sinusoidal excitation was used. The frequency range was chosen from 10 kHz down to 10 uHz. The object under test and the measuring instrument were placed in a Faraday cage due to high impedance of the object. The data was acquired using Atlas-Sollich 0441 High-impedance Analyser. The varistor details were described in the referenced paper. The graph presents measurement points (blue asterisks) and results of model fitting (red squares)
Rg=(750±390)Mohm; R=(80±0,9)Gohm; C=(5,7±0,2)nF;