OFFSHORE WIND • HVDC 525KV INTERCONNECTORS • 5,000T CAROUSEL SPMT

HVDC Subsea Power Cable Turntable Transport Manual

Comprehensive heavy haul operating protocols for mobilizing 2,000T–7,000T offshore wind and international grid interconnector cable carousels: multi-file SPMT synchronized load-outs, circular roller track foundation engineering, and CIGRE TB 623 compliance.

01 Turntable & Multi-File SPMT Matrix

SPMT Axle-Line Loading & Utilization: 29.1 MT / Axle (73% Rating)

02 DNV Marine Warranty Survey (MWS) Status MWS APPROVED

Total Roll-On Gross Mass 12,456,000 lbs 5,650 MT Combined
Quayside Ground Pressure 17.8 T/m² Within 25.0 T/m² Slab Rating
RoRo Linkspan Dynamic Ramp Slope: < 1.2% (Ballast Equalized)
CIGRE TB 623 Bending & Tensile Margin: Passed • Zero Lead Sheath Fatigue
Turntable Circular Ring Beam Rigidity: ≤ 4mm Global Deflection
Marine Warranty Load-Out Certificate Active

SPMT electronic multi-file synchronization verified. Quayside load spreader grillage installed over high-stress transition zones.

Exspeedite Heavy Energy Division v7.5 Deploy Cable Load-Out Engineering →
01

5,000T Ring Beam Deflection

Cable carousels concentrate thousands of tons onto circular steel roller tracks. During multi-file SPMT transport, unequal support deflection causes binding of the central drive pivot and localized plastic deformation of the roller race. Structural grillage beams must restrict global deflection to under 5mm.

02

Barge Ballast Sync (>3,000 m³/hr)

Rolling a 5,000 metric ton carousel onto a cable laying vessel or transport barge transfers colossal point loads across the linkspan. Automated high-capacity ballast systems pump water at over 3,000 cubic meters per hour to counteract barge de-ballasting and match the quayside elevation continuously.

03

CIGRE TB 623/853 Compliance

High-voltage 525kV submarine cables incorporate extruded lead alloy moisture barriers and optical fiber strain elements. Mechanical stress induced during turntable transport and spooling must stay within CIGRE TB 623 test parameters to prevent fatigue cracking of the lead sheath.

Request HVDC Turntable Load-Out Engineering

Commission certified multi-file SPMT load-out studies, quayside ground bearing surveys, and CIGRE TB 623 cable handling plans for offshore energy projects.