Other test equipment included a Line Insulation Tester and an Automatic Trunk Tester, for items whose numerosity and simplicity lent themselves to automatic testing.
3.
Finally, depending upon the environmental conditions and the performance of overhead line insulation operating with HVDC, it may be possible for a given transmission line to operate with a constant HVDC voltage that is approximately the same as the peak AC voltage for which it is designed and insulated.
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