Abstract
On the basis of extensive detection experience on full reel testing of cables it is proposed that, in addition to level, a characteristic designated as corona be determined on each reel length of high-voltage cable with extruded conductor and insulation shields. The factor establishes the relationship between discharges in the cable and voltage stress over a stress range up to several times the operating level. In addition, it is proposed that full reel power factor measurements be made to provide a check on the resistivity of the extruded shields. The use of a novel continuous discharge detector in the laboratory to locate defects in the cable core, with insulation semiconducting shield in place, is described.
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