60-Cycle AC Breakdown of 345-kV Paper Insulated Cable
- 1 January 1967
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-86 (1) , 53-60
- https://doi.org/10.1109/TPAS.1967.291775
Abstract
High-voltage-time tests at 60 cycles were made with an 800-kV series resonant test set on 21 samples of 345-kV impregnated -paper-insulated high-pressure oil-pipe-type cable. The breakdown level of cables, expressed in equivalent volts per mil for one hour life (V/mil/h) under 200-psig oil pressure decreased from 1130 to 850 V/mil/h when the conductor temperature was increased from 70 to 110°C. At 100 psig the breakdown level decreased from 870 to 670 V/mil/h from 50 to 80°C. One sample at 50 psig with a conductor temperature of 62°C had a breakdown level of 600 V/mil/h. Fault paths terminated in radial holes at the conductor and outer shield with a longitudinal running path between these terminations. There was no regular pattern to the fault paths, relative to the conductor screen or to gaps between turns of the insulating tapes.Keywords
This publication has 2 references indexed in Scilit:
- Research on the Impulse Breakdown Mechanism of the Dielectric as Used in Oil-Filled CablesIEEE Transactions on Power Apparatus and Systems, 1964
- Electric Stresses in CablesTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1962