For studying the simulation accuracy of the IEEE model and Pinceti model for metal - oxide varistor (MOV)

six types of MOVs at rated voltage of 150-750 V are taken as the object to theoretically and experimentally analyze the residual voltage absorption energy at amplitude of lightning impulse current of 4/10 μs and 8/20 μs and the switching current of 30/60 μs. The results show that in the parameter determination of IEEE model

the reference voltage of the nonlinear resistance increases but the inductance decreases with the increase of switching impulse current amplitude; In the residual voltage prediction

the error of IEEE model is 2.6%

which is more accurate than 4.6% of the Pinceti model; In the estimation of the energy absorption of MOV

the accuracy of IEEE model is higher than that of the Pinceti model when the current amplitude is less than 10 kA

and the accuracy of IEEE model to the switching impulse current of 30/60 μs is higher

but to the lightning impulse current of 8/20 μs is lower.