Dredging Cable -3E medium voltage submersible trailing cable with black CM sheath by TEBAOFLEX
Cross section of Dredging Cable -3E showing 3 power cores, 3 earth conductors and waterproof sheath system
CM outer sheath and waterproof EPR inner sheath of Dredging Cable -3E for permanent immersion
  1. Dredging Cable -3E medium voltage submersible trailing cable with black CM sheath by TEBAOFLEX
  2. Cross section of Dredging Cable -3E showing 3 power cores, 3 earth conductors and waterproof sheath system
  3. CM outer sheath and waterproof EPR inner sheath of Dredging Cable -3E for permanent immersion

Dredging Cable -3E 3.6/6kV – 12/20kV MV Submersible Trailing Cable | Waterproof Dredger Power Cable

Dredging Cable -3E is a medium voltage submersible trailing cable specifically engineered for dredging operations, featuring 3 earth conductors for enhanced safety in permanent underwater and wet environments. Manufactured by TEBAOFLEX to VDE 0250-813, it combines a water-blocking EPR inner sheath with a heavy-duty CM (Chlorinated Polyethylene) outer sheath for permanent immersion in sea water, brackish water, and freshwater up to 300 meters depth. Rated for 15 N/mm² tensile load and abrasion-resistant construction, it is the preferred power supply cable for dredgers, floating dredge pumps, cutter suction dredgers, and trailing suction hopper dredgers operating in marine and inland waterway environments.

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Dredging Cable -3E — TEBAOFLEX MV Submersible Trailing Cable for Dredging Operations

What -3E Means

-3E designates a cable configuration with 3 earth conductors, providing redundant grounding for safety-critical dredging applications where the cable operates in conductive water environments. Unlike standard MV cables with a single or split earth, the -3E configuration ensures that if one earth conductor is damaged during trailing over the seabed, the remaining two maintain a safe ground path.

Dredging vs Standard Submersible Cable

Feature Standard Submersible Cable Dredging Cable -3E
Primary Operation Static pump immersion Dynamic trailing along seabed
Earth Conductors 1 or 2 3
Outer Sheath EPR or CM Heavy-duty CM reinforced
Abrasion Requirement Moderate High (dragged over sediment/rock)
Tensile Load Rating Varies 15 N/mm²
Water Type Fresh/sea water Sea, brackish, sediment-laden water
Core Configuration 3 power + 1-2 earth 3 power + 3 earth
Mechanical Stress Low to medium High (trailing, twisting, chafing)

Construction

Layer Material
Phase Conductors Tinned copper, Class 5 (VDE 0295 / IEC 60228), extra-fine stranded
Inner Semi-Conductive Layer Semi-conductive tape over conductor
Insulation EPR 3GI3 quality rubber compound (DIN VDE 0207-20)
Outer Semi-Conductive Layer Extruded semi-conductive rubber
Earth Conductors 3 x tinned copper Class 5, distributed in interstices
Central Filler Rubber compound on textile polyester support
Inner Sheath EPR rubber compound (waterproofing, GM1b quality)
Screen Tinned copper wire braid
Outer Sheath CM (Chlorinated Polyethylene) rubber compound (5GM3 quality), Black

Core Configuration: 3 Power + 3 Earth

Technical Specifications

Parameter Value
Rated Voltage (Uo/U) 3.6/6kV — 6/10kV — 8.7/15kV — 12/20kV
Design Standard Based on DIN VDE 0250-813
Conductor Standard VDE 0295 / IEC 60228 Class 5
Max Water Depth 300 meters
Max Conductor Temperature +90°C
Max Short Circuit Temperature +250°C
Ambient Temperature (Fixed) -40°C to +80°C
Ambient Temperature (Mobile) -25°C to +80°C
Max Tensile Load 15 N/mm² (referred to total phase conductor cross-section)
Water Resistance EN 50525-2-21 (AD8 condition)
Flame Retardant IEC 60332-1-2
Oil Resistance IEC 60811-404
Ozone Resistance Yes
UV Resistance Yes
Outer Sheath Colour Black
Sheath Compound CM (Chlorinated Polyethylene) / 5GM3

Dimensional Data

Voltage Cross Section (mm²) Conductor Ø (mm) OD min-max (mm) Weight (kg/km) Max Tensile (N)
3.6/6kV 3×25 + 3×25/3E 6.8 43.4-45.1 2,830 1,125
3.6/6kV 3×50 + 3×25/3E 9.4 48.1-49.8 3,830 2,250
6/10kV 3×70 + 3×35/3E 11.2 53.7-56.1 5,000 3,150
8.7/15kV 3×120 + 3×70/3E 14.4 69.8-72.2 8,520 5,400
12/20kV 3×95 + 3×50/3E 12.7 69.8-72.2 7,740 4,275

Why -3E Is Critical for Dredging

Dredging Hazard Consequence -3E Solution
Cable dragged over sharp coral/rock Earth conductor cut, loss of ground path 3 independent earths maintain ground even if 1-2 are damaged
Constant immersion in conductive seawater Electrolysis and ground current leakage Redundant earthing provides continuous protection
Twisting and kinking during trailing Earth conductor fatigue fracture 3 earths distributed in interstices reduce individual stress
Impact from dredge debris Outer sheath penetration, water ingress CM sheath + waterproof EPR inner sheath double barrier
Abrasion from suspended sediment Outer sheath wear, gradual thinning Heavy-duty CM compound with high abrasion resistance

Standards and Certifications

Standard Scope
DIN VDE 0250-813 Cable design and testing
IEC 60228 / VDE 0295 Class 5 Flexible conductor
IEC 60332-1-2 Flame retardant
IEC 60811-404 Oil resistance
EN 50525-2-21 AD8 Water resistance (permanent immersion)
RoHS Compliance
ISO 9001:2015 TEBAOFLEX quality management

Application Environments

Application Cable Role
Cutter suction dredgers Power supply to cutter drive and underwater pump motors
Trailing suction hopper dredgers Trailing cable dragged along seabed behind drag head
Dredge pumps and booster stations Submersible power feed to floating or submerged pump units
Floating pipelines and docks Power and earth supply to floating equipment with constant water exposure
Waterway and port maintenance dredging Temporary power supply for mobile dredging operations
Mining dredging operations Power cable for dredging equipment in mining settling ponds

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