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ACCC Conductor Spans Lake Nzilo in the Congo
New Ultra Low Sag 'ULS' ACCC Conductor Utilized to Decrease Structural Costs
Earlier this month Power Line Africa completed the installation of the newly introduced 'ULS' (Ultra Low Sag) ACCC conductor in Congo, Africa. The new double circuit 120 kV line crossed Lake Nzilo in the Democratic Republic of the Congo, Africa, to provide power to the Mumu mine. The mine is located near the town of Kolwezi in the Katanga Province, an important copper, cobalt and uranium mining center.
CTC Global's new Ultra Low Sag 'ULS' ACCC conductor was chosen for its high-strength, light-weight, high-capacity and excellent self-damping characteristics. The ACCC ULS 451 kcmil (229 mm^2) Monte Carlo size conductors spanned 4,491 feet (1.369 kilometers) over the lake between newly erected 354 foot tall (108 meter) lattice structures.
While the tensile strength of conventional ACSR steel core is about 210 ksi (1448 MPa), and tensile strength of the standard ACCC conductor core is an impressive 313 ksi (2158 MPa). The new ULS ACCC core offers a tensile strength of 375 ksi (2586 MPa) which substantially raises the performance bar over any other conductor on the market today. The weight of both the standard ACCC core and the ULS ACCC core are about 70% lighter than steel, each of which also offer a coefficient of thermal expansion about one-tenth that of steel.
To install the ACCC ULS conductor, the crew began by pulling a floating rope across the lake. The rope was then attached to a woven steel pilot line which was lifted into position and used to pull in the new ACCC conductor. After the conductor was installed, in addition to aviation markers mounted on the overhead ground wire, several 150 pound (68 kg) induction lights were also placed on the lower conductor phase wire for additional aircraft safety.
While several ACCC conductor installations have already been completed in South Africa (most of which were energized "live-line" reconductoring projects for Johannesburg Power), this particular project was the second long span project undertaken in Africa. Earlier this year, ACCC conductor was utilized to repair a long span section of a 500 kV DC line in Mozambique that was knocked out of service when flood water downed a structure.
Though CTC Global initially developed the ACCC 'ULS' conductor to decrease sag under extreme ice load conditions, its high-strength, high-modulus and light-weight also make it ideally suited for long span applications.
For more information about the ACCC and ACCC 'ULS' conductor, please visit CTC Global's website at: www.ctcglobal.com
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ACCC Conductor is an internationally patented and trademark registered product of CTC Global Corporation. The ACCC conductor is manufactured in association with several qualified and licensed international stranding partners. If you are interested in the ACCC conductor, please contact CTC Global to make sure your supplier is authorized to produce ACCC. Thank You.
CTC Global Corporation 2026 McGaw Ave. Irvine, California, USA 92614
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Technical Updates
New 'ULS' ACCC Conductor Developed for Heavy Ice Load and Long Span Applications
The ACCC conductor offers higher tensile strength and reduced thermal sag compared to other bare overhead conductors such as AAC, AAAC, ACAR, ACSS, ACCR, Invar and GAP. The ACCC conductor's core is also more elastic compared to other conductor types, so, under heavy ice and wind load conditions the composite core will not yield and permanently deform. While this characteristic offers advantages, the down-side is that under extreme ice load conditions, the standard ACCC core's elasticity may allow it to sag more than a less-elastic metal core when heavily loaded with ice.
To combat extreme ice loads and reduce conductor sag, CTC Global began developing a high-modulus core in 2009. Several conductor sizes were developed and tested. One such conductor known as Oslo (619 kcmil / 313.8 mm^2) was installed alongside AAAC Sycamore and ACSR Lynx conductors at the Deadwater Fell test site in the UK. Testing of the new design confirmed its improved ice-load sag resistance. The ACCC 'ULS' conductor is now being deployed where extreme ice loads are anticipated. Its added strength, higher modulus and lower coefficient of thermal expansion also make it ideally suited for long span applications.
For more information, please visit:
www.ctcglobal.com
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Free
Conductor Selection Software
Responding to an ever-increasing demand to help select the most appropriate size of the highest performing ACCC conductor available, CTC Global has developed a new software program, CCP.
The program is available at no charge to utility planners, transmission engineers and others involved in conductor selection, project engineering and project economics. Using the design parameters associated with your specific project, CCP can calculate and compare ampacity, sag, tension, line losses, and the economics associated with the reduction in thermal sag and line losses the ACCC conductor offers compared to any other conductor of the same diameter and weight.
To receive a free copy of CCP:
CLICK HERE
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Engineering with High-Capacity, Low-Sag ACCC Conductor
To help T&D planners, engineers, and technicians take full advantage of the ACCC conductor's attributes, CTC Global has published a 250 page Engineering Manual. Contact CTC Global today to request a copy.
Request Your Free Copy!
CLICK HERE
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