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Cable Rejuvenation Mechanisms: An Update

October 17, 2010

Recent advances in cable life extension technology have demonstrated a greater than three-fold life improvement over earlier generations. This paper provides an update to a 2006 “Cable Rejuvenation Mechanisms” paper providing the most up-to-date fluid formulations and performance data.

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Cable Rejuvenation: Choices

March 31, 2010

From 1984 through 2009, approximately 90 million feet of medium voltage underground power cables were treated with available injection technologies. Cable injection is typically a fraction of the cost of replacement and the economics are almost always in favor of rejuvenation. Undoubtedly, the favorable economics of rejuvenation fueled its rapid growth.

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Considerations for Injecting Cables with High Conductor Temperature

November 11, 2009

The first generation of injection technology was intended for lightly loaded cables in cooler soils. Attempts to utilize this first generation approach for more heavily loaded cables in warmer climates, particularly feeder cables, have not always been successful. Formerly identified issues including, supersaturation, over saturation, asymmetrical penetration profiles, and aluminum corrosion are reviewed. A previously unidentified failure cause is described. A new generation of injection technologies that addresses all of the identified postinjection performance issues is introduced.

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Electrical Tests on Novinium 200 A Load Break Injection Elbows

August 26, 2009

Two modifications were recently made by Novinium to the Elastimold 200 A load break direct test elbow. This report shows the results of tests made to determine if modifications made by Novinium to the Elastimold direct test elbow interfere with the elbow’s compliance to the requirements set forth in IEEE 386, and to perform partial discharge and flashover tests on modified and non-modified elbows and to compare the results.

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Silicone Injection: Better with Pressure

May 19, 2009

Moderate pressure injection has been utilized for over two decades and has demonstrated several significant advantages over the low pressure inject-and-soak paradigm. In 2006 sustained moderate pressure injection further advanced rejuvenation technology, increasing post injection reliability. This paper traces the evolution of injection pressure in dielectric enhancement technology and compares the merits of the available delivery methods. The paper goes on to introduce the latest improvement in injection technology, thermally enhanced rejuvenation.

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RUS Letter Order Approving Capitalization of Novinium Brand Product

April 3, 2009

On September 4, 2008, the Federal Energy Regulatory Commission (FERC), acting upon a request from the manufacturer, issued Docket No. AC08-143-000, approving the capitalization of the cost of the injection rehabilitation products for underground cable (URD) known by the product names Perficio and Ultrinium, which are manufactured by Novinium, Inc. Based on the actions of the FERC, the Rural Utilities Service now authorizes the capitalization of the cost of Perficio and Ultrinium injected into underground cable.

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Thermal Testing of Novinium Feeder Cable Splices on Service Aged 750kcmil XLPE Cable Extracted from the Georgia Power System

April 1, 2009

At the request of its members and with the assistance of Novinium Inc, NEETRAC has undertaken testing to determine the response of service-aged URD and Feeder cables to cable rejuvenation. This report describes thermal testing of Novinium Feeder Cable Splices on service aged 750kcmil XLPE cable extracted from the Georgia Power System using the procedures agreed upon by the NEETRAC members supporting the URD and Feeder project (07-136).

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Extending Power Cable Life an Additional 40 Years

January 1, 2009

For more than 20 years, cable rejuvenation has been used at electric utilities to extend power cable life. Most cable rejuvenation has been carried out in residential subdivisions. However, with the latest improvements in injection fluids, industrial customers are beginning to adopt cable rejuvenation for chemical, industrial, and power plants as an insurance policy against power cable failures. For about one-half the cost of replacement, power cable life can be extended up to 40 years.

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Rehabilitation: The 3R’s

October 28, 2008

There are over 2 billion feet of aging underground power cable in North America. This large quantity of cable must be rehabilitated for the circuits to continue to provide a reliable electric supply. This paper provides a strategic paradigm for optimal use of capital to tackle this problem. Re-evaluate, Rejuvenate, and Replace are the 3R’s of an advanced tactical rehabilitation program, which provides the optimum benefit-to-cost ratio. An improved set of materials and processes are introduced to rejuvenate cables with unsustained pressure for the few cases where the more advanced sustained pressure rejuvenation method is difficult to implement.

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