The proposed model is shown in Fig.3 and derives
from that in [1]. It is intended for the simulation of the
dynamic characteristics for discharge currents with front
times starting from 8 µs. As in [3], between the non-linear
resistances A0 and A1 only the inductance L1 is taken into
account. R0 and L0 are neglected. C0 represents the
terminal-to-terminal capacitance of the arrester. The
resistance R in parallel to A0 is intended to avoid
numerical oscillations. The model in Fig.3 works
essentially in the same way as that proposed in [1].
To explain the principle of the new proposal, it will be
referred in a first approach to only one arrester valve block.
The conclusions are later generalized for a complete
MOSA.