Power CSL, a UK subsea cable accessory specialists, has launched
a high voltage jointing system that hopes to reduce the cost of repairing
subsea cables in the offshore renewables and oil & gas sectors.
The joint is suitable for the offshore repair of a wide
range of high voltage subsea cables. It takes 48-60 hours to install -
compared with a typical time of 80 hours for conventional products - cutting
down the waiting time for a suitable weather window and repair vessel time
on station.
Pat Oakley, director, said: “Several years of research
and analysis have gone into developing this joint, which has many advantages
over other repair solutions, particularly in terms of cable range-taking
capability and ease of installation.
“The jointing system is not associated with the cables
of any particular manufacturer and its modular design can be configured
for a wide range of connections.
“This product will substantially increase the UK and European
supply chain capacity for HV subsea cable repair, improving the availability
of trained jointers and radically reducing the time it takes to repair
faults on critical subsea power connections.”
The Power CSL joint, which can be used for repairing subsea
cables up to 170kV, has successfully completed an extensive mechanical,
electrical and hyperbaric test programme meeting CIGRE 490, 171 and 623
regimes, and IEC specifications. The electrical type test was carried out
by the KEMA laboratory, with the complete test programme being witnessed
by DNV GL.
The joint uses high tensile strength compression conductor
connections. Its insulation system comprises a one-piece cold-shrink moulding
with internal stress control features, developed by 3M and selected by
PCSL for subsea application following close technical collaboration. All
mouldings are fully electrically tested (HV and PD) during manufacture.
The combination of single-piece construction and simple
shrink-down technique removes the potential for assembly problems during
installation that may arise with some multi-component joint insulation
reinstatement systems.
No special tools are required for the repair joint installation.