GreenLink HV Hub

MacArtney HV GreenLink hubs are heavy-duty, dry-mate modular ‘subsea sockets’ made up to house multiple cables. Each module is mechanically linked to other modules using GreenLink inline termination technology. Extra sections can be added at initial launch or at a later stage, making the GreenLink hub a flexible option over time.

Speed and flexibility for offshore terminations

The innovative GreenLink hub design is connector based and all connections are mechanical, eliminating the need for moulding and drying, hereby making vessel based preparations fast and efficient. Bolts and flanges have replaced cutting, splicing and terminations. Therefore, should a GreenLink hub need dismounting and  remounting, it merely needs to be raised, unbolted, rebolted and lowered back into the water. This makes subsequent system adjustments and additions comparatively fast and straightforward. The hub comes with pressure caps for sealing unused ports.

MacArtney has designed the GreenLink hub with all cable entry points located on the same side. This makes the hub easier to handle after termination and minimises the risk of cable damage as the system is deployed on the seabed. Alternative configurations available upon request.

GreenLink hubs can be used for multiple subsea marine renewable energy applications including wind, tidal and wave energy converters which are typically located close to shore.

As standard, GreenLink hubs are manufactured from stainless steel AISI 316L, with sacrificial anodes for protection against corrosion inflicted by seawater. Moreover, the hubs come with external O-ring test ports on the hub housing. These can be used for testing the O-ring seal on the fully assembled hub.

Finally, GreenLink hubs are available with water blocking at the cable cut between the hub housing and the inline termination connector ports.

Highlighted specifications

• Standard working voltage: up to 72,5 kV
• Up to 2,500 A
• Conductor range: 95-1,600 mm2
• Working depth: 100 m (other working depths available upon request)
• Housing material: stainless steel AISI 316L (other materials available upon request)
• Design life: 25 years (with 5 year maintenance periods)
• O-ring test ports on hub housing
• Connectable with GreenLink inline termination

Applications

• Subsea hub
• UTU - underwater termination unit
• Connecting multiple dynamic cables to export cable
• Connecting multiple cables from wind, tidal and wave energy converters to export cables
• Interconnecting multiple energy converters
• Interconnecting subsea installations

Options

• Water blocking between the hub housing and the inline termination connector ports - up to 10 bar pressure (Note: May depend on actual cable - case by case verification required)
• The hub can be dry or nitrogen filled (pending final design)