Vary pole design to reuse existing R-O-W. [Tennessee Valley Authority]

Journal Article · Thu Apr 01 04:00:00 EST 1976 · Electr. World; (United States)

OSTI ID:7283559

Roane, R W; Thomas, W G

To avoid acquiring additional right-of-way (R-O-W) in a fully developed urban area, Tennessee Valley Authority added transmission capacity by designing 25 structures that support up to five circuits each. It was necessary to deliver 200 MW to a new substation in Chattanooga. To provide a firm source of power to the substation, TVA used an existing Chattanooga Electric Power Board R-O-W over Missionary Ridge, TVA's R-O-W to Chickamauga hydro plant, and easements and R-O-W to Oglethorpe substation that were acquired from Georgia Power Co. The existing CEPB lines consisted of one 13-kV and two 46-kV circuits. TVA's Chickamauga line was a 110-kV circuit parallel to a short section of CEPB lines. The reconstructed line is essentially a 161-kV single circuit, with a double-circuit loop over Missionary Ridge. The design uses pole shafts with octagonal cross-section. Finished pole sections were hermetically sealed, primed, and painted with a lusterless green finish color. The insulating value of the epoxy-fiberglass crossarms for the 161-kV circuits permitted use of suspension strings with only five fog-insulator units, rather than the 11 units that are normally required. The design emphasized the slimness of the pole shafts. To reduce visual impact still further, a shadow line conductor was installed to eliminate initial glare on the aluminium wires. Two insulated static wires were used to satisfy possible future communications requirements. Swing brackets provide necessary electrical clearance on suspension angle structures, while stub arms that are used on strain structures eliminate jumper support arms and insulator strings. (MCW)

• Research Organization: Tennessee Valley Authority, Chattanooga
• OSTI ID: 7283559
• Journal Information: Electr. World; (United States), Journal Name: Electr. World; (United States) Vol. 185:7; ISSN ELWOA
• Country of Publication: United States
• Language: English

Related Subjects

200300 -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
29 ENERGY PLANNING, POLICY, AND ECONOMY
296002* -- Energy Planning & Policy-- Electric Power Transmission & Distribution-- (-1989)
DESIGN
ENVIRONMENTAL EFFECTS
LAND USE
MECHANICAL STRUCTURES
NATIONAL ORGANIZATIONS
POWER TRANSMISSION
POWER TRANSMISSION LINES
SITE SELECTION
SPECIFICATIONS
SUPPORTS
TENNESSEE VALLEY AUTHORITY
US ORGANIZATIONS