A high ampere-year impressed anode consisting of graphite rods connected to an insulated header wire has been developed and installed by the Philadelphia Electric Company in its underground conduit system. The rods are two inches in diameter and 18 inches long. They are spaced five feet apart and pulled into a duct in lengths up to 500 feet. Special reels with flat sides are used to handle the anode. The first installation was in 6000 feet of conduit to protect lead sheathed power cables. Direct current is supplied to this anode by one rectifier located in the middle of the conduit run. Tests have indicated that protection has been obtained comparable to that available with continuous metal ribbon anodes, but life expectancy is considerably longer and troubles due to anode separation caused by uneven dissipation of ribbon type anodes is avoided.
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1 July 1955
Research Article|
July 01 1955
Carbon Anode Installed In Electric Cable Conduit⋆
Howard L. Davis, Jr.
Howard L. Davis, Jr.
HOWARD L. DAVIS, JR.—Transmission and Distribution Engineer, Philadelphia Electric Company, Philadelphia. An electrical engineering graduate of Swarthmore College in 1925, he began corrosion mitigation work in 1927 on a 66,000-volt underground cable system with Philadelphia Electric Co. He has since devoted much time to corrosion of underground power facilities. He is chairman of a committee in his company dealing with corrosion problems in all departments. He is a member of AIEE, Edison Electric Institute, National Committee for Utilities Radio, National Society for Professional Engineers and Engineers Club, Philadelphia.
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CORROSION (1955) 11 (7): 23–26.
