Life Extension of 15kV #2 Cables
Salmon River had tried injection in the past, but had numerous failures immediately after injection. Additionally, they were concerned that flowing fluid through splices would weaken them. Consequently, they approached doing another injection with some reluctance.
Because Novinium did not attempt to flow through splices and offered a 40-year warranty, they decided to try injection again.
Rick Leuzinger said, “The project went very well. We were given an estimated cost and the job came in very close to the estimate. Novinium was very flexible on their contract and the options that they offered us. They did what we wanted.
We chose the Customer Craft method of injection, and Novinium did a good job or training our craft people. After this training, our linemen feel that now they can almost do cable injection by themselves.
“We chose to have our crews involved, because we wanted our crews to know how to perform cable rejuvenation. In the future, we would like to license the cable rejuvenation process.
“After Novinium was done with injection and we had replaced any splices, we had a completely new system—new elbows, new splices, and like new cable! I liked the 40-year warranty.
“Novinium has a cleaner process than the one we tried previously—no soak tanks. It is more exact—when you get the fluid out the other end, you are done with the injection. We went with the better product.”
Novinium offers many ways for a circuit owner to inject their cables: Turnkey, Subcontractor, Customer Craft, Subcontractor License, and Customer License. These choices allow each customer to choose the best way to implement each job each year.
Turnkey: Historically, cable rejuvenation has been offered on a turnkey basis. In this method, the rejuvenation contractor is given a set of prints and then proceeds to complete the entire project after going through the appropriate circuit owner safety training program. Tasks include: customer notification, cable switching, grounding, TDR testing, removing terminations, cable injection, installing new terminations, and restoring the power.
Subcontractor: In this case, Novinium works with the circuit owner nominated craft personnel. This subcontractor would provide customer notification, cable switching, grounding, and remover the terminations. Novinium would then TDR the cable and inject the cable. The subcontractor would install new terminations and restore power.
Customer Craft: Because of tradition, union rules, or availability of labor, many circuit owners prefer to use their own craft personnel when working on their circuits. Typically, this is the fastest and most economical choice, because these people know the system and are trusted by the switching center. The division of tasks would be the same as when a subcontractor is used.
Subcontractor License: In this case, Novinium would license and train the circuit owner specified subcontractor in all of the injection tasks. Then the subcontractor would purchase tools, fluid, and injection adaptors from Novinium. The subcontractor would pay a license fee to Novinium, maintain injection records in the Novinium NITS system, be responsible for the first year of warranty, and bill the circuit owner for the work done. Retraining would be carried out on a regular basis to insure skills are maintained.
Customer License: Because the circuit owner has available manpower or slow periods of the year, they might want to license the Novinium process and train their own crews. As in the subcontractor license, after training, customer crews would carry out all phases of injection. They could work year round, or only when crews are available. This choice would also allow the circuit owner to inject cables when they faulted, insuring that they would not have a second failure. This inject-on-fault has a dramatic impact on system reliability.
Challis, ID, U.S.A.
15 kV, XLPE #2 cable (34 mm2 )—8100 feet
Residential cable runs had begun to fail in their Southern Addition
Cable Rejuvenation—Sustained Pressure Rejuvenation (SPR) methods were utilized to extend the life of this cable.