
62 Electrotechnical Systems
different segments of the curve (2.30). The values given in Figure 2.50 are typical for
the metal-oxide varistors. The points of the transition from one segment to the other
are determined by the crossing of individual curves. For given parameters, they are
I/I
ref
= 0.1 and I/I
ref
= 1.5. The corresponding dependence is shown in Figure 2.51. If
it is necessary to dissipate the high power, several varistors are connected in parallel
(the line Number of columns).
The model2_11 shows employment of the Surge Arrester. The transmission line
consists of two sections, and the length of each is 50 km; the line is loaded on the ...