Key Activites
This project Introduced the concept of a new cable jointing system that requires a new methodology for installation compared to existing systems. The new learning are based around process methodologies, new equipment to use and potentially measuring when a joint is cured and when it is safe to backfill.
Expected Outcomes
This is an early stage research project and will inform the potential for future projects looking at new jointing techniques for cable insulation.
Progress
The project produced the following outcomes in the last 12 months:
- Developed and successfully trialled a lightweight filler that can easily replace the sand currently used. The filler is a by-product of the coal power industry and reduces weight by 69% compared with sand. One bucket of pre-packaged sand weighs 6.5kg, the Fillite weighs 2kg.
- Developed and successfully trialled a two-part polyurethane foam filling system. The foam was 5 times quicker to fill a breach joint and 35 times lighter compared with traditional joint materials. Less than 1kg of foam is needed to fill a breach joint compared with 33.75kg of resin and sand.
- Developed a hinged clamshell with cable gland connectors and clips to make assembly easier and quicker for jointers.
- Developed a proof of concept joint which included a pre-formed electrically insulating gel. This solution requires no mixing or filling of a clamshell on site and is the quickest solution. The clamshell can be assembled and secured onto the joint within 5 minutes. The gel material however is very expensive.
- Generated benchmark weight and times for the current method which were previously unknown.
Collaborators
- Centrica Hive Limited (trading as Hive)
- Energy Innovation Centre Limited (EIC)
Project Budget
£118,000
Start/End Date
Jul 2021 – Nov 2022
