The Salt River Project (SRP), a utility serving south Phoenix, Ariz., has a large population of aging feeder and URD cable. With numerous replacement projects, SRP saw its cost of line maintenance rising faster than the budget could handle. SRP decided to try Novinium® cable rejuvenation and has experienced a less than 1 percent failure rate on the treated cable.
The Intermountain Rural Electric Association (Intermountain REA) began to experience an increasing number of failures with cable laid in the in 1970s and ‘80s. By proactively rejuvenating entire neighborhoods before cables failed, the utility improved service levels to a 99.4 percent reliability rate and saved tens of millions of dollars.
600 Miles of Aging Cable Restored with Novinium Sustained Pressure Rejuvenation
One of Dayton Power and Light’s most critical customers is the Dayton International Airport. After one of the main feeder cables supplying power to the airport terminal experienced several disruptions, the utility used Novinium’s Sustained Pressure Rejuvenation (SPR) process to restore 42,255 feet of cable.
As an alternative to ongoing cable replacement, London Hydro asked Novinium to conduct a pilot cable injection project in a large subdivision. Since then, Novinium has gone on to inject more than 174,465 meters of cable for London Hydro and cable failures have declined by 58 percent.
With several projects to complete, Inland Power and Light decided to train crews on the Novinium processes. Cable rejuvenation helped address Inland Power and Light’s most challenging lines and has remained an important part of its asset management plan.
Some 4,800 feet of submarine cable from Tacoma Power, feeding 14 customers on tiny Ketron Island, was nearing the end of its design life. The utility decided to rejuvenate the underwater line before a fault occurred and has not experienced any faults in the now-guaranteed, rejuvenated cable.
Matanuska Electric Association (MEA) found that even subdivisions with well-laid cable were experiencing increasing faults with the stress of multiple freezes each year, so the utility decided to try cable injection to restore reliable service. Now, the Novinium-trained MEA staff can do the work so efficiently that MEA plans to continue using cable injection year-round.
The Glendale Subdivision had experienced numerous faults—as many as five or six a year dating as far back as 1984. Greenwood Utilities hired Novinium to rehabilitate the utility’s vaults and treat the cable line in the area. After the project was finished, the subdivision experienced no faults.
Estimated costs for the St. Charles Municipal Electric Utility cable replacement needs came in at about $6.6 million. St. Charles chose a solution comprised of 77 percent Novinium® cable rejuvenation and 28 percent cable replacement, saving $4.3 million, or 66 percent of the original project estimate.