## 3 Results
### Comparison of the Performance of a Surge Arrester with a Degraded Cable and a Nominal One
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & & & & & & & \\ \cline{3-8}  & & & & & & & & \\ \cline{3-8}  & & & & & & & & \\ \cline{3-8}  & & & & & & & & \\ \hline \multirow{6}{*}{A} & & C\({}_{4}\) & 1 nF & 697.96 & 9.54 & 2.09 & 1 409.5 \\ \cline{3-8}  & & & GDT & SG75 & 697.96 & 1 334.5 & 1 251 & 29 102 \\ \cline{3-8}  & & & GR\({}_{9}\) & 2.2R (\(\times\)3) & 329.44 & 49.92 & 198.52 & 16 444 \\ \cline{3-8}  & & & GR\({}_{10}\) & 2.2R (\(\times\)3) & 329.56 & 49.93 & 198.51 & 16 456 \\ \cline{3-8}  & & & D\({}_{4}\) & SMDJ28 CA & 38.96 & 49.83 & 49.91 & 1 941.2 \\ \cline{3-8}  & & & R\({}_{5}\) & 1R & 3.22 & 3.22 & 1.34 & 10.37 \\ \cline{3-8}  & & & R\({}_{6}\) & 1R & 3.22 & 3.22 & 1.34 & 10.37 \\ \cline{3-8}  & & & D\({}_{1}\) & SMDJ5.0 CA & 7.12 & 3.22 & 4.24 & 22.90 \\ \cline{3-8}  & & & D\({}_{2}\) & SMDJ6.0 CA & 6.79 & 0.06 & 0.01 & 0.43 \\ \cline{3-8}  & & & D\({}_{3}\) & SMDJ6.0 CA & 6.80 & 0.08 & 0.01 & **0.51** \\ \hline \multirow{6}{*}{A} & & C\({}_{4}\) & 1 nF & 705.88 & 8.88 & 2.10 & 1426.64 \\ \cline{3-8}  & & & GDT & SG75 & 705.88 & 1326.87 & 1239.42 & 29081.59 \\ \cline{3-8}  & & & GR\({}_{9}\) & 2.2R (\(\times\)3) & 333.38 & 50.51 & 186.82 & 16840.03 \\ \cline{3-8}  & & & GR\({}_{10}\) & 2.2R (\(\times\)3) & 333.46 & 50.52 & 186.81 & 16847.91 \\ \cline{3-8}  & & & D\({}_{4}\) & SMDJ28 CA & 39.04 & 50.43 & 47.64 & 1968.67 \\ \cline{3-8}  & & & R\({}_{5}\) & 1R & 3.20 & 3.20 & 1.31 & 10.25 \\ \cline{3-8}  & & & R\({}_{6}\) & 1R & 3.20 & 3.20 & 1.31 & 10.25 \\ \cline{3-8}  & & & D\({}_{1}\) & SMDJ5.0 CA & 7.12 & 3.20 & 4.18 & 22.77 \\ \cline{3-8}  & & & D\({}_{2}\) & SMDJ6.0 CA & 6.79 & 0.06 & 0.01 & 0.42 \\ \cline{3-8}  & & & D\({}_{3}\) & SMDJ6.0 CA & 6.79 & 0.07 & 0.01 & **0.46** \\ \hline \multirow{6}{*}{B} & & C\({}_{4}\) & 1 nF & +1.14\% & \(-\)7.21\% & +0.21\% & +1.24\% \\ \cline{3-8}  & & & GDT & SG75 & +1.14\% & \(-\)0.57\% & \(-\)0.97\% & \(-\)0.10\% \\ \cline{3-8}  & & & GR\({}_{9}\) & 2.2R (\(\times\)3) & +1.21\% & +1.21\% & \(-\)5.90\% & **2.42\%** \\ \cline{3-8}  & & & GR\({}_{10}\) & 2.2R (\(\times\)3) & +1.19\% & +1.19\% & \(-\)5.90\% & 2.40\% \\ \cline{3-8}  & & & D\({}_{4}\) & SMDJ28 CA & +0.21\% & +1.21\% & \(-\)4.54\% & 1.42\% \\ \cline{3-8}  & & & R\({}_{5}\) & 1R & \(-\)0.59\% & \(-\)0.59\% & \(-\)2.54\% & \(-\)1.17\% \\ \cline{3-8}  & & & R\({}_{6}\) & 1R & \(-\)0.59\% & \(-\)0.59\% & \(-\)2.54\% & \(-\)1.18\% \\ \cline{3-8}  & & & D\({}_{1}\) & SMDJ5.0 CA & \(-\)0.01\% & \(-\)0.58\% & \(-\)1.45\% & \(-\)0.59\% \\ \cline{3-8}  & & & D\({}_{2}\) & SMDJ6.0 CA & \(-\)0.01\% & \(-\)0.86\% & \(-\)9.18\% & \(-\)0.87\% \\ \cline{3-8}  & & & D\({}_{3}\) & SMDJ6.0 CA & \(-\)0.11\% & \(-\)9.99\% & \(-\)9.73\% & \(-\)**10.09\%** \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Comparison of the performance of the surge arrester configuration for a degraded and a non-degraded cable \(U_{WE1}=6\) kV. In Group A components (Figure 6), the aging effect on power dissipated on resistive components reaches a maximum of \(+2.42\%\) (\(P_{max}^{CRB}\)). In Group B, the relative changes amount to a maximum of \(-10.09\%\) (\(P_{max}^{D4}\)), but the change in absolute terms amounts to \(0.05\) W only. Table 7 presents the effect of cable degradation on the performance of the surge arrester for input voltage \(U_{WE2}=650\) V.  
The change of the critical parameters presented in Table 7 with respect to the components in Group A indicates a slight influence of the degradation of the cabling parameters on the performance of the surge arrester (mostly a percentage change below \(1\%\)). The greatest changes concern C4 max and GDTmax, but considering the absolute changes, these values are negligible in relation to other parameters (\(\Delta\)C4 max = 24 mA, C4 max NOMINAL = 0.49 A against  
\(\text{D}_{3\text{\,Imax\,NOMINAL}}=31.89\) A). Similarly, in Group B, generally the changes in performance are small. If the relative change is large (\(\Delta\text{D}_{2\,\text{Pmax\,}}\%=24.37\%\)), it is connected with small absolute values (\(\Delta\text{D}_{2\,\text{Pmax\,}}=7\) mW).