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continuous flexing

Technical Department
on12/03/2026

Полиуретановая (PUR) оболочка кабеля для спредера: 44G2.5 PUR — характеристики, конструкция, цена для кранов STS и RTG

Complete engineering guide to PUR-sheathed control cables for container spreaders on STS and RTG port cranes: why PUR exceeds traditional chloroprene rubber (CR/Neoprene) by 3–4× in abrasion and cut resistance; reference specification 44G2.5 mm² PUR — OD 30.5–34.0 mm, weight ~1,550–1,700 kg/km, copper index ~1,056 kg/km, current 26 A, voltage 300/500 V (up to 0.6/1 kV), tensile 2,500–5,000+ N, hoist speed ≤160 m/min, temp -40/+80°C; construction: bare copper class 5/6, TPE core insulation, Kevlar/aramid central strain relief core, PUR outer sheath; Basket Reeling and vertical drum technology; configurations: 12G, 24G, 44G, 52G, 61G; pricing: Prysmian vs TKD Trommelflex vs Lapp vs Tratos vs Feichun FC-SPR (45–60% savings); 5-year TCO calculator for STS crane (4 spreaders). Bromma, Stinis, ZPMC compatible.
15 Min Read
Complete technical datasheet Chinese equivalent Prysmian PROTOLON (SB) NTSCGEWOEU 6/10 kV: reeling cable mobile heavy-duty equipment — port gantry cranes (RTG/STS/RMG), open-pit excavators, stacker-reclaimers, spreaders, draglines, bucket-wheel excavators. Configuration 3×50 mm² power + 2×(25/2) mm² earth + 1×16 mm² control (st). Rated voltage 6/10 kV (max. 7.2/12 kV). Outer diameter ~45.0–49.5 mm, weight ~3,650–3,800 kg/km, copper index ~1,834 kg/km. Current capacity ~183 A @ 30°C. Min. bending radius 12–15×OD. Travel speed up to 120–240 m/min. Max. tensile force ~2,250 N (15 N/mm² copper, up to 30 N/mm² acceleration per DIN VDE 0298-3). Temperature -35°C to +80°C flexing, -50°C to +80°C fixed. EPR/HEPR insulation with semiconductive field-control screens 6/10 kV, dual outer sheath PCP/PUR — abrasion/oil/UV/ozone/flame resistant (EN 60332-1-2). Additional testing: reversed bending, torsional stress, roller bending per DIN VDE 0250-813. Russian GOST equivalent КГЭШ-Т 6/10 kV. EAC, GOST-R/-K/-B, Fire Certificate certified.
Technical Department
on11/03/2026

Аналог PROTOLON (SB): кабель барабанный 3×50+2×25/2+1×16st 6/10 kV — полный технический паспорт (Feichun Cable, Китай)

Complete technical datasheet Chinese equivalent Prysmian PROTOLON (SB) NTSCGEWOEU 6/10 kV: reeling cable mobile heavy-duty equipment — port gantry cranes (RTG/STS/RMG), open-pit excavators, stacker-reclaimers, spreaders, draglines, bucket-wheel excavators. Configuration 3×50 mm² power + 2×(25/2) mm² earth + 1×16 mm² control (st). Rated voltage 6/10 kV (max. 7.2/12 kV). Outer diameter ~45.0–49.5 mm, weight ~3,650–3,800 kg/km, copper index ~1,834 kg/km. Current capacity ~183 A @ 30°C. Min. bending radius 12–15×OD. Travel speed up to 120–240 m/min. Max. tensile force ~2,250 N (15 N/mm² copper, up to 30 N/mm² acceleration per DIN VDE 0298-3). Temperature -35°C to +80°C flexing, -50°C to +80°C fixed. EPR/HEPR insulation with semiconductive field-control screens 6/10 kV, dual outer sheath PCP/PUR — abrasion/oil/UV/ozone/flame resistant (EN 60332-1-2). Additional testing: reversed bending, torsional stress, roller bending per DIN VDE 0250-813. Russian GOST equivalent КГЭШ-Т 6/10 kV. EAC, GOST-R/-K/-B, Fire Certificate certified.
42 Min Read
The (N)TSCGEWÖU 3x50+3x25/3 12/20kV reeling cable has a base ampacity of approximately 210 amperes when installed in free air with standard ambient conditions of 30°C (86°F) and conductor temperature not exceeding 90°C. However, when this same cable is wound in a 3-layer configuration on a cylindrical motorized reel drum—a typical arrangement for port cranes, ship-to-shore gantries, mining equipment, and mobile cargo handling systems—the effective ampacity is dramatically reduced through application of the DIN VDE 0298-4 thermal derating factor of 0.49. This produces a practical continuous ampacity of approximately 102.9 amperes (calculated as 210 A × 0.49), representing less than half the free-air capacity. The cable features three 50 mm² main phase conductors and three 25 mm² grounding conductors arranged in a compact helical geometry, with an outer diameter of approximately 52–58 mm and total weight of approximately 4,300–4,600 kg/km. The derating factor reflects the fundamental thermal reality that cable layers wound inside the drum cannot radiate heat to the surrounding air, trapping thermal energy and forcing the cable to operate at temperatures significantly above the ambient reference condition.
Technical Department
on28/02/2026

Derating Factors: Current Carrying Capacity of (N)TSCGEWÖU 3×50+3×25/3 12/20kV Wound in 3 Layers on a Reel

The (N)TSCGEWÖU 3×50+3×25/3 12/20kV reeling cable has a base ampacity of approximately 210 amperes when installed in free air with standard ambient conditions of 30°C (86°F) and conductor temperature not exceeding 90°C. However, when this same cable is wound in a 3-layer configuration on a cylindrical motorized reel drum—a typical arrangement for port cranes, ship-to-shore gantries, mining equipment, and mobile cargo handling systems—the effective ampacity is dramatically reduced through application of the DIN VDE 0298-4 thermal derating factor of 0.49. This produces a practical continuous ampacity of approximately 102.9 amperes (calculated as 210 A × 0.49), representing less than half the free-air capacity. The cable features three 50 mm² main phase conductors and three 25 mm² grounding conductors arranged in a compact helical geometry, with an outer diameter of approximately 52–58 mm and total weight of approximately 4,300–4,600 kg/km. The derating factor reflects the fundamental thermal reality that cable layers wound inside the drum cannot radiate heat to the surrounding air, trapping thermal energy and forcing the cable to operate at temperatures significantly above the ambient reference condition.