Update on the Development of Reduced Wall 138kV HPOF Cables and Joints for Re-Conductoring of Existing 69kV Lines on the Florida Power & Light Company System

A reduced wall 138kV HPOF pipe-type cable having a 700 kcmil (355 mm2) compact round copper conductor and 348 mils (8.8 mm) of insulation and two types of joints have been developed for re-conductoring existing 69kV HPOF feeders utilizing 5 inch (127 mm) outside diameter pipes on the Florida Power & Light Company (FP& L) system. Laboratory test results on the cable and two joints, one employing hard paper and the other high density crepe paper tapes, are reported. The commercial cable installation is described. Test results are also given on an improved design reduced wall 138kV HPOF pipe-type cable having a 2000 kcmil (1015 mm2) compact segmental copper conductor and 379 mils (9.6 mm) of insulation and a high density crepe paper joint intended for re-conductoring a 69kV HPOF pipe-type feeder using the existing 6-5/8 inch (168 mm) outside diameter pipes. The cable and joint satisfactorily passed all requirements of AEIC CS2-82 (4th Edition) [4].