SANS Type 61B 0.64/1.1kV Flexible Copper Screened Mining Cable
Type 61B Copper Shield 0.64/1.1kV Mining Cable: Enhancing Safety, Reliability, and Efficiency in South Africa's Challenging Mining Landscape Under SANS 1520 Standards
SANS Type 61B 0.64/1.1kV Flexible Copper Screened Mining Cable
Applications
Electrically driven machines , movable electric apparatus in hazardous areas .Not for reeling purposes.
Other industrial applications.
Features
Excellent flexibility
Water resistant and flame retardant
Operating temperature min. ambient temp. -25℃, max. conductor temp. 90℃.
UV, sunlight, ozone, oil, resistant
Embossing marking as per order.
Specifications
Low Voltage
Cold Resistant -25℃
UV Resistance
Water Resistance
Working Temperature 90℃
Oil Resistance
Flame Retardant
Construction
Cable type: Type 61B 0.64/1.1 kV
Conductors: Flexible class 5 comply to SANS 1411 - 1 from tinned annealed copper wires left lay with semi-conducting rubber screen .
Insulation: Ethylene propylene thermosetting compound type RD 3 comply to SANS 1411-3 and a strippable semi-conducting core screen (triple extruded)
Core of cable: Three tinned copper braided screened power cores and three unscreened pilot cores one in each interstice laid up in the right hand lay around semi-conductive rubber filler.
Inner sheath: Poly-chloroprene thermosetting compound type RS 6 comply to SANS 1411-3 .
Re-enforcement: An open nylon braid . Minimum 16 of nylon strings .
Outer sheath: Poly-chloroprene thermosetting compound type RS 6 comply to SANS 1411-3 .
Colour of sheath: Black .
Tests: SANS 1520-1.
Physical Properties | ||||||
Power Cores | ||||||
Conductor sizes (mm2) | 35 | 50 | 70 | 95 | 120 | 150 |
Maximum wire diameter ( mm) | 0.41 | 0.41 | 0.51 | 0.51 | 0.51 | 0.51 |
Approx. conductor diameter ( mm) | 8.5 | 10.3 | 11.9 | 13.5 | 15.5 | 17.3 |
Maximum screen wire diameter (mm) | 0.31 | 0.31 | 0.31 | 0.31 | 0.31 | 0.31 |
Braided screen filling factor (%) | 80 | 80 | 80 | 80 | 80 | 80 |
Approx. summarized screen cross-section for power cores (weighing method) (mm2) | 27 | 32 | 37 | 43 | 47 | 52 |
Pilot Cores | ||||||
Conductor sizes ( mm2) | 6 | 6 | 16 | 16 | 16 | 16 |
Maximum wire diameter ( mm) | 0.31 | 0.31 | 0.41 | 0.41 | 0.41 | 0.41 |
Approx. conductor diameter ( mm) | 3.2 | 3.2 | 5.2 | 5.2 | 5.2 | 5.2 |
Lay Ratio (maximum) (x PCD) | 12 | 12 | 12 | 12 | 12 | 12 |
Cable Diameter | ||||||
Approx. (mm) | 41 | 42.5 | 48 | 52.3 | 58 | 63.5 |
Cable mass (approx.) (kg/m) | 3.1 | 3.6 | 4.8 | 5.7 | 7.1 | 8.5 |
Minimum bending radius (mm) | 300 | 340 | 390 | 430 | 460 | 500 |
Maximum recommended tension (kN) | 1.6 | 2.3 | 3.2 | 4.3 | 5.4 | 6.8 |
Electrical Properties | ||||||
Power cores | ||||||
Maximum cond. DC resistance @ 200C (Ω/km) | 0.576 | 0.401 | 0.283 | 0.214 | 0.167 | 0.135 |
Maximum cond. DC resistance @ 900C (Ω/km) | 0.734 | 0.511 | 0.360 | 0.273 | 0.213 | 0.171 |
Reactance (Ω/km) | 0.090 | 0.090 | 0.088 | 0.086 | 0.086 | 0.085 |
Impedance (Z) @ 900C (Ω/km) | 0.740 | 0.519 | 0.371 | 0.287 | 0.230 | 0.191 |
Sustained current rating @ 300C ambient | ||||||
Laid out straight (A) | 160 | 200 | 245 | 295 | 345 | 390 |
Short circuit rating : | ||||||
Symmetrical fault current (kA for 1 sec) | 4.3 | 6.1 | 8.5 | 11.6 | 14.6 | 18.3 |
Earth fault current (screens) (kA for 1 sec) | 2.1 | 3.1 | 3.5 | 4.1 | 4.1 | 4.1 |
Benefits
Flexibility: Easily maneuvers in confined underground spaces, reducing installation time and labor costs.
Safety Features: Water-resistant and flame-retardant, compliant with safety protocols in flood-prone or fire-risk areas, critical given South Africa's high mining accident rates.
EMI Protection: Copper shielding ensures uninterrupted power to critical equipment in high-interference environments.
Durability: High tensile strength (up to 6.8kN for 150mm²) withstands dragging and pulling, extending service life and reducing downtime amid rising input costs (2025 mining report).
Environmental Resistance: UV, oil, and ozone resistance protect against surface degradation in open-pit mines and atmospheric wear.
Cost-Efficiency: Fewer replacements due to durability, supporting cost savings.
ESG Compliance: Thermosetting compounds minimize toxic emissions during fires, aligning with ESG trends (African Mining Trends 2025).
Applications and Usage Scenarios
Primary Uses: Low-voltage setups for conveyor systems, crushers, pumps, drilling, and material handling.
Regional Applications:
South Africa: Ideal for platinum and gold mines with deep shafts requiring reliable trailing cables.
Zambia: Copper operations benefit from EMI shielding in high-interference zones.
Ghana: Weather resistance suits remote gold fields.
Botswana: Used in diamond mines for machinery in arid conditions.
DRC: Flexibility supports cobalt extraction in rugged terrain.
Other Uses: Suitable for static or semi-mobile setups in hazardous areas, quarries, and construction, but not for reeling applications.
Installation and Maintenance Recommendations
Installation:
Adhere to minimum bending radii (e.g., 300mm for 35mm²) to prevent stress fractures.
Use trained personnel for terminations, handling strippable screens carefully.
Secure cables with clamps and route away from sharp edges to avoid abrasion.
Maintenance:
Conduct regular visual inspections for cuts or swelling.
Perform electrical testing for insulation integrity.
Clean cables to remove dust or chemicals, checking for moisture ingress in humid mines.
Store in dry, shaded areas to preserve UV resistance.
Follow SANS guidelines with biennial tests in high-risk environments to extend lifespan and reduce costs.
