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2022 Kaskasi II Germany 7

Kaskasi II (Germany) – Subsea Cable Laying & Protection

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The Kaskasi II project concerns the realization of  a three-phase AC connection in North-Sea-Cluster 4. The three-phase current generated in the Kaskasi II offshore wind farm is to be transported to the HVDC substation HelWin Beta via two AC submarine cables.

The system is composed by two power cables with an interstitial optical unit that was simultaneously laid and buried independently from each other on two parallel routes of approx. 4 km length each.

ZTT has awarded Asso a contract for the execution of work includes 10.280km (2 cables, 5km each) submarine cable installation and protection including the initial pull-ins on platform.

Asso’s scope of work included:

  • Preparation activities // Mobilization activities
  • Cable transpooling 
  • Pre – Lay Grapnel Run Operations
  • Platform pull-in
  • Simultaneous lay & Burial  
  • Post Lay Burial Operations -Jetting  

PROJECT SPECIFICATIONS

  • Owner
    Tennet
  • Contractor
    ZTT International Limited
  • Year
    2022
  • Cable Type
    hvac
  • Cable Diameter
    203.5 mm
  • Cable Weight
    57.4Kg/m (water) 84.3Kg/m (air)
  • Laying Length
    Approx 10Km
  • Trenching Length & Burial Depth
    1.5 DOB
  • Jetting Length & Burial Depth
    9.277m @ 1.5m DOB
  • Max Water Depth
    24m

    Kaskasi II (Germany) – Subsea Cable Laying & Protection

    The Kaskasi II project concerns the realization of  a three-phase AC connection in North-Sea-Cluster 4. The three-phase current generated in the Kaskasi II offshore wind farm is to be transported to the HVDC substation HelWin Beta via two AC subma …

    Kaskasi II (Germany) – Subsea Cable Laying & Protection

SERVICES PROVIDED

Some of the services we provided for Kaskasi II (Germany) – Subsea Cable Laying & Protection 

  • Subsea Cable Laying Subsea Cable Laying
  • Subsea Cable Protection Subsea Cable Protection
  • Seabed Preparation Seabed Preparation

VESSELS USED

  • Atalanti

    DP II – Cable Laying Vessel The Atalanti is a DP-2 Cable Laying Vessel that has been specially …

    Atalanti Cable Laying Vessels
  • Aethra

    DP II – Trenching Support Vessel The Aethra is a DP-2 Trenching Support Vessel built for worldwide operations, …

    Aethra Trenching Support Vessels
  • Artemis

    DP I – Anchor Handling and Supply Vessel The Artemis is a DP-1 Anchor Handling Tug & Supply …

    Artemis General Support Vessels

EQUIPMENT USED

  • HydroPlow

    Asso.subsea Hydroplow is a lightweight jetting sled that is intended for use in tandem with a CLV (Cable …

    HydroPlow Ploughs, Subsea Burial Equipment
  • AssoJet III Mk1

    The AssoJet III is the newest of the ASSO’s jetting ROVs. It has been in-house designed & manufactured …

    AssoJet III Mk1 Deep Water Trenchers, Subsea Burial Equipment

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