Trailing & towing
Primary 640/1,100 V trailing cable for continuous miners, shuttle cars, roof bolters and mobile feeder-breakers.
Product
South African SANS 1520-1 Type 61A heavy-duty trailing and reeling cable (640/1,100 V) with three tinned-copper/nylon braid-screened EPR power cores, one unscreened pilot core, CR inner sheath and a tear-resistant TPU outer sheath.
Typical values for this cable type, based on SANS 1520-1 · SANS 1411-1 & -3 — confirmed in the datasheet and quotation for your order.
Application fit
Engineered for underground coal shuttle cars, continuous miners, LHD loaders and high-wear reeling/trailing applications where a thermoplastic polyurethane (TPU) outer sheath—and optional transparent TPU over orange/silver reflective tape—dramatically reduces rock-cut and run-over damage.
Primary 640/1,100 V trailing cable for continuous miners, shuttle cars, roof bolters and mobile feeder-breakers.
Rated for horizontal drum reeling on shuttle cars and LHD loaders with a 16-string open nylon anti-torsion braid.
Low-friction TPU outer sheath spools smoothly on multi-layer shuttle-car reels while resisting flange pinch.
EPR insulation, CR inner sheath and TPU outer jacket resist wet mine floors, hydraulic oil and ozone.
Flexible unarmoured trailing construction — do not suspend in deep vertical mine shafts without support.
Use BS 6708 Type 20/21 ArmouredConstruction
Three Class 5 tinned copper power cores insulated with EPR and individually screened with a tinned-copper/nylon braid are laid up with one unscreened EPR pilot core around a central rubber filler, bedded in a CR polychloroprene inner sheath, reinforced with a 16-string open nylon braid, and oversheathed in black TPU (or transparent TPU over orange/silver reflective tape).
| # | Layer | Material & reference |
|---|---|---|
| 1 | Power conductors (3) | Class 5 flexible stranded tinned annealed copper per SANS 1411-1SANS 1411-1 |
| 2 | Power core insulation | Ethylene propylene rubber (EPR) thermosetting compound (640/1,100 V grade)SANS 1411-3 |
| 3 | Individual phase screens (3) | Composite tinned copper (0.31 mm wires) and nylon braid screen over each power coreEarth-fault screen |
| 4 | Pilot core (1) | Unscreened Class 5 tinned copper pilot core with EPR insulation laid up in intersticePilot interlock circuit |
| 5 | Inner sheath | Polychloroprene (CR) rubber inner sheathSANS 1411-3 |
| 6 | Reinforcement braid | Open-weave nylon reinforcement braid (minimum 16 strings)SANS 1520-1 |
| 7 | Outer sheath (TPU) | Thermoplastic polyurethane (TPU), black or transparent over orange/silver reflective tapeSANS 1520-1 · ICEA S-75-381 Tab. 3-3 |
Standard black thermoplastic polyurethane outer sheath over CR inner sheath and 16-string nylon braid
Transparent TPU outer sheath encapsulating a helically wound orange/silver retro-reflective tape for underground visibility
Technical data
Sizes
Dimensions, screen area, pilot size, maximum tensile load and 30 °C straight current rating.
| Designation 3P + 1 Pilot | Power mm² | Power Ø mm | Screen area mm² | Pilot mm² | Pilot Ø mm | Max. tension kN | Nominal OD mm | Mass ≈ kg/km | Current (30 °C) A | Sym. S/C (1 s) kA | Enquiry |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type 61A · 3 × 25 + 1 × 10 mm² | 25 | 6.8 | 25 | 10 | 4.2 | 1.1 | 40.5 | 2,850 | 130 | 3.1 | |
| Type 61A · 3 × 35 + 1 × 10 mm² | 35 | 8.5 | 27 | 10 | 4.2 | 1.6 | 43.5 | 3,320 | 160 | 4.3 | |
| Type 61A · 3 × 50 + 1 × 10 mm² | 50 | 10.3 | 32 | 10 | 4.2 | 2.3 | 47.0 | 4,050 | 200 | 6.1 | |
| Type 61A · 3 × 70 + 1 × 16 mm² | 70 | 11.9 | 37 | 16 | 5.3 | 3.2 | 53.0 | 5,120 | 245 | 8.5 | |
| Type 61A · 3 × 95 + 1 × 16 mm² | 95 | 13.5 | 43 | 16 | 5.3 | 4.3 | 59.1 | 6,340 | 295 | 11.6 | |
| Type 61A · 3 × 120 + 1 × 16 mm² | 120 | 15.5 | 47 | 16 | 5.3 | 5.4 | 63.0 | 7,450 | 345 | 14.6 | |
| Type 61A · 3 × 150 + 1 × 25 mm² | 150 | 17.3 | 52 | 25 | 6.8 | 6.8 | 67.5 | 8,750 | 390 | 18.3 |
Reel check
A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.
Quality & approvals
Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.
| Testing & inspection | Test value / reference | Frequency |
|---|---|---|
| Routine tests | ||
| AC high-voltage dielectric withstand test | Routine AC withstand test on 640/1,100 V EPR cores per SANS 1520-1 | Every shipping drum |
| Conductor, screen & pilot DC resistance | Verified on all 3 power conductors, 3 individual copper/nylon screens and pilot core | Every shipping drum |
| Sample tests | ||
| TPU outer sheath tear, abrasion & UV/oil test | Tested to SANS 1520-1, SANS 1411-3 and ICEA S-75-381 Tab. 3-3 | Production batch |
Marking & supply
Sheath marking
Technical documents
FAQ
Not covered here? Send your drawing — an engineer replies within 2 business hours.
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