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Although CTC Global has held itself out as having been in business since 2001 and as having made sales of ACCC spanning more than 10 years, a review of the public documents available shows that CTC Global has only been in existence since July 2011 and could not have sold or installed ACCC prior to that time. Meanwhile CTC Cable and Composite Technology Corporation are still in Bankruptcy.
For more information on the History of the “CTC” companies and multiple bankruptcy filings from 2005 and 2011
Composite Technology Corporation and CTC Cable filed bankruptcy in May 2005. In april 2011, CTC filed it’s 2nd U.S. Bankruptcy less than 18 months after concluding its initial bankruptcy.
The most recent 2011 bankruptcy is still ongoing.
In August 2011, Russian entities Kaskol and RU-COM jointly acquired Composite Technology Corp’s assets out of its U.S. bankruptcy proceedings in a deal valued at more than $11 million, Dow Jones Daily Bankruptcy Review reported. The Russian companies’ joint venture, called CTC Acquisition Corp., paid $1 million in cash and assumed the responsibility for at least $10.5 million in Composite Technology’s liabilities, according to a purchase agreement filed with the U.S. Bankruptcy Court in Santa Ana, California. CTC Acquisition Corp subsequently changed its name to CTC Global.
Independent Testing at multiple industry leading facilities including the University of Southern California Composites Center and Kinetrics establish that the ACCC product has porosity and concentricity issues that impacted its performance in the Sequential Mechanical Testing ( developed by AEP to simulate accelerated aging and extreme field conditions) and quite likely had an impact in the multiple line failures ACCC Conductor has experienced in Indonesia, China, United States and Poland.
Overhead Conductor (ACCC) Failure on Live Line in Indonesia
No one expects sudden conductor breakage of the live line in the overhead transmission lines, however it is widely reported that several projects in Indonesia, Poland, China, India, Mexico, U.S. and others experienced serious accidents caused by the conductor breakage of aluminium overhead conductor with composite core reinforcement (so-called Aluminium Conductor Composite Core: hereinafter abbreviated “ACCC”) under the conditions of live line operation within the short period after completion of conductor installation.
This report concerns the failure of the installed ACCC conductor in Indonesia
The failure of ACCC occurred suddenly during normal operations of the live line on approximately the 10th day following completion of the installation of the ACCC conductor in Indonesia. It should be carefully noted that no portion of aluminium component wires or conductor surface were damaged during the installation works, while whole conductor was broken. Following extensive analysis, it was concluded that the ACCC composite core housed inside the conductor was broken first due to certain stress or defects. Following the failure of the ACCC composite core and the component wires of annealed aluminium were broken due to over-loading stress caused by the ACCC composite core reinforcement. It is obvious that the breakage of composite core was due to a defect in the ACCC carbon composite core, as the support member failed under conditions of ordinary installation work.
Excerpt from Line Upgrade Features Low-Sag Conductor
James Berger, American Electric Power | TD World
During the conductor pulling operation, installation crews experienced three breaks of the ACCC/TW conductor. The first break occured at the outset of wire pulling when the ACCC/TW conductor. The first break occurred at the outset of wire pulling when the conductor jumped off the tensioner bull wheel and wrapped around the tensioner axle. This event was plainly an operator error. During this specific operation , the operator should have applied the reel brake. Instead, the operator lessened brake tension, and the loosened wire left its track on the drum and broke when it was bent too severely around the tensioner axle. In this case, wire already pulled for this particular phase was simply eliminated, and pulling resumed with fresh wire.
The second and third wire breaks were more troubling and required in-depth forensics. Break two occurred as wire was pulled into a span and being tensioned for sagging. Break three, involving several breaks in the core, occurred less than two weeks later in the middle phase, after all three phases had been pulled in, tied off and the crew had left for the day.
2008 ACCC Failures in Poland
Excerpt from page 37 of Dr. Kumosa report on HT Low Sag Conductors
“Three catastrophic failures within six months after the line was energized”
Excerpt from 3M United States – ACCR – Frequently Asked Questions
Testing in the U.S. also showed mechanical failure at the tensions as low as 93% of rated breaking strength as well as under excessive bending. As a result, the maximum recommended tension loading has been derated to 80% of the catalog RBS. Known failures of the conductor either during installation or operation have occurred in the U.S., China, Poland and Indonesia.