Application in practice: Some examples

A lightning/surge current counter which can also register the response of surge protective devices. This is designed according to the current transformer and registers surge currents with peak values exceeding 200 A. Such a counter can be installed directly into the down conductor of a lightning protection system or the earth bonding line of a protective device without reducing the cross section. Often it is necessary to carry out surge voltage/surge current tests not only in the laboratory or during the production of protective devices but also in the field. Here the portable 'hybrid generator' shown in Figure 6 d has been proven. In the case of a short circuit it emits a standardized 8/20 μs surge current with a maximum peak value of 10 kA, whereas in open circuit it generates the standardized surge voltage wave 1.2/50μs with a peak value up to 10 kV.