that was supposed to combine the requirements for lightning current and surge arresters in accordance with the IEC 62305-4 standard series in a single device. This
allowed the realization of a series connection directly via the device. Figure 7.62
shows such a series connection in the form of an operating circuit diagram. From
Figure 7.63 it can be observed howadvantageous it is to implement a series connection
with the aid of a busbar.