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Technical Papers - page 2

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How Hot Is It? A Survey of Temperatures Inside Medium-Voltage Electrical Enclosure Across North America

June 19, 2016

This paper studies the temperatures recorded inside electrical enclosures throughout North America. The results were collected over the course of a year at four geographically different locations in cryic, mesic, thermic and hyperthermic soils and from systems operating with phase to phase voltages of 15 through 35kV. This paper illustrates the effects that the ambient conditions, seasonal load fluctuation and installation factors have on the temperatures measured inside enclosures. The internal temperatures impact the safety and long-term durability of the ancillary equipment often contained within distribution-class electrical enclosures such as cable rejuvenation equipment, rejuvenation fluid, smart sensors, partial-discharges sensors, fault indicators, etc. and this data should be given consideration in the standards and installation guidelines for those devices.

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What the Heck is Cable Rejuvenation?

October 14, 2015

If only we could do for humans what we do for underground residential distribution (URD) cables. Imagine that as you approached the end of your life, you could drink a magic elixir and within a week you could perform at your peak in every way for another 40 years. That is precisely what Novinium® brand Cablecure® rejuvenation fluid does for URD cables. Your power utility has another option, it can replace the aging URD cable with new cable. The new cable will perform reliably, but installing it will tear up streets and landscaping, take a lot longer, squander scarce world resources, and cost 2 to 5-times more, which must ultimately be reflected in your electric rates. Cablecure rejuvenation is a safer, faster, and better alternative.

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Total System Reliability Program for Underground Electrical Distribution Networks

August 31, 2015

A holistic approach is proposed to look at all components of the system to ensure increased reliability with improved impulse breakdown strength, allowing the asset manager to retrofit an existing system to today’s stricter standards. This holistic approach looks at everything in the distribution system and once corrective actions are complete, the aged systems are completely updated to comply with the latest standards and thinking regarding reliability issues. The ultimate goal is to eliminate an unscheduled electrical outage.

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History & Status of Silicone Injection Technology

August 2, 2012

Over twenty-five years have elapsed since the commercial introduction of the first solid dielectric enhancement technology. During those years, silcone injection technology has proven itself as an important tool to enhance the reliability of aging infrastructure. This paper traces the evolution of dielectric enhancement technology, compares the merits of the available technologies, and provides a comprehensive bibliography. The merit comparisons are made in the broad categories of safety, short-term and long-term post-injection reliability, and end-user value.

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Novinium Quality Statement

April 24, 2012

Novinium’s policy is to conduct its business in a manner that provides the highest level of quality and reliability to our customers. The Novinium® brand is embodied by the procedures set forth in the Novinium Rejuvenation Instructions or NRIs.

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A Comparison of Rejuvenation Hazards

January 19, 2011

Over two decades have elapsed since the commercial introduction of the first solid dielectric enhancement technology or chemical rejuvenation. During those years, silane injection has proven itself as an important tool to enhance the reliability of aging infrastructure. There are some risks associated with rejuvenation. Some of those risks are shared with replacement. Some risks are unique to injection. This document examines the risks of chemical rejuvenation utilizing the two most widespread commercial injection methods and materials for URD cables.

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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. Today, utilities can evaluate their cable rejuvenation choices to enhance power cable reliability at the lowest possible cost.

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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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