CableCURE^®
  White Papers

 

Cable Remediation Program Cost Management Using Silicone Injection Abstract The efforts of one utility to address escalating underground outages while controlling cost and meeting customer expectations has led to the widespread use of silicone injection.  After years of replacing cable at high economic cost, Puget Sound Energy (PSE) has implemented a process designed to reduce program costs without impacting reliability results.  Cable injection provides long-term reliability results at a fraction of the cost of trenching through established cities and neighborhoods to replace aging cable. To read more click here.

Managing Water Tree Degradation of Medium Voltage Distribution Cables Abstract Through the years XLPE insulated cables have been manufactured with tiny defects that act as the nucleus for the formation of water trees.  Once installed the progression from defect to water tree and finally to failure is inevitable.  This paper explores the progression to failure and methods for managing its effect on system reliability with particular focus on the method of restoration using silicone injection.   To read more click here.

Study of AC Breakdown Strength and Water Treeing in 15kV XLPE Insulated Field Aged Cable Samples Treated with CableCURE® Technology Abstract Zachry Global Services Incorporated, San Antonio, Texas, USA requested King Saud University (KSU) to perform AC breakdown tests as defined in ICE-S-94-649-1997, Section 10.3.1 for "High Volume Time Test Procedure", and Water Tree Survey as defined in AEIC-CS5-94, Section M.2.1 "Tree Count" on four samples of thee core, 15kV, XLPE insulated 185 mm2 copper conductor cables, each of 8 m length. The goal of these tests was to measure the effectiveness of this treatment.  This report provides the AC breakdown/withstand voltage levels as well as, the statistical information about water trees and their size distributions found in treated and untreated samples. To read more click here.

Influence of Corroded Conductors on the Performance of Medium-Voltage Extruded Cables Abstract In the underground distribution network, "milky" water is occasionally found in the inner aluminum stranded conductor of extruded cables.  The water may have entered into the cable either during installation or aging, or is the result of ingress through an unsealed termination.  When the inner conductor is made of aluminum, the water may corrode it and alumina is formed, which explains the whitish color.  This raises the question to what extent the milky water or the corrosion left on the conductor surface affects the performance or aging of the cable?  It is already well known that the presence of water in the insulation of cross-linked polyethylene (XLPE) cables leads to water treeing degradation and ultimately to cable failure. To read more click here.

Extending the Service Life of Ethylene Propylene Rubber Insulated Cables Abstract Data are presented on rehabilitation of black and pink ethylene propylene rubber (EPR) insulated 15kV cables.  The black EPR cables were aged in service in feeder installations at Reliant Energy for 24 years; the pink EPR cables were aged at Cable Technology Laboratories in tanks, under accelerated conditions for 48 months.  The results indicate that CableCURE XL liquid and dry gas are suitable to significantly increase the ac and impulse voltage breakdown levels of both black and pink EPR calbes and thereby prolong their service life.  The influence of liquid injection pressures and gas flow rates plus times of application on both types of insulation were explored.  No significant change in dissipation factor or volume resistivity was observed. To read more click here.