Improving the heat dissipation capability of the arrester means that the curve Q
onFigure5.4willbeliftedtohighervalues, hencethethermalpropertyofthearrester
is improved. For this reason, conducting tests on pro-rated units or model units must
ensure that the unit reproduces the heat dissipation and thermal characteristics of the
complete arrester to which the tests are to be related [68].