SANS Type 61A 0.64/1.1kV Flexible Copper Screened Mining Cable
Type 61A 0.64/1.1kV flexible copper screened mining cables: offering superior durability, safety, and resistance to environmental hazards while addressing current trends like cable theft and power outages.
SANS Type 61A 0.64/1.1kV Flexible Copper Screened Mining Cable
OVERVIEW:
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 0C , max. conductor temp. 900C.
UV ,sunlight , ozone ,oil, resistant
Embossing marking as per order.
Specifications
Low Voltage
UV Resistance
Working Temperature 90℃
Cold Resistant -40℃
Construction
Cable type: Type 61A 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 cradle centre (only16 mm2 around rubber (RD1) filler centre ) .
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.
Parameter:
Type 61A 0.64/1.1kV Mining Cable
Physical Properties | ||||||||||
Power cores | ||||||||||
Conductor sizes (mm2) | 16 | 25 | 35 | 50 | 70 | 95 | 120 | 150 | ||
Maximum wire diameter ( mm) | 0.41 | 0.41 | 0.41 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | ||
Approx. conductor diameter ( mm) | 5.3 | 6.8 | 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 | 0.31 | 0.31 | ||
Braided screen filling factor (%) | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | ||
Approx. summarized screen cross-section for power cores | 22 | 25 | 27 | 32 | 37 | 43 | 47 | 52 | ||
Pilot Cores | ||||||||||
Conductor sizes ( mm2) | 10 | 10 | 16 | 16 | 16 | 16 | 16 | 16 | ||
Maximum wire diameter ( mm) | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | ||
Approx. conductor diameter ( mm) | 4.2 | 4.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | ||
Lay Ratio (maximum) (x PCD) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
Cable Diameter | ||||||||||
Approx. (mm) | 31 | 38 | 43 | 47 | 52 | 58 | 63 | 70 | ||
Cable mass (approx.) (kg/m) | 1.8 | 3.1 | 3.6 | 4.5 | 5.6 | 7.0 | 8.4 | 10.2 | ||
Minimum bending radius (mm) | 200 | 240 | 260 | 290 | 320 | 350 | 390 | 430 | ||
Maximum recommended tension (kN) | 0.7 | 1.1 | 1.6 | 2.3 | 3.2 | 4.3 | 5.4 | 6.8 | ||
Benefits of Type 61A Cables
Type 61A cables are designed for harsh mining environments, offering multiple advantages:
Flexibility: Reduces installation stress, enables easy routing in confined spaces, and minimizes fatigue over time.
Environmental Resistance:
Water Resistance: Prevents short circuits in flooded mines, critical in South Africa due to climate-induced heavy rains.
UV, Sunlight, Ozone, and Oil Resistance: Ensures durability in outdoor or chemically exposed settings.
Temperature Range: Operates reliably from -25°C to 90°C, suitable for South Africa’s variable climates (e.g., Highveld winters to Lowveld summers).
Safety Features:
Flame Retardancy: Complies with international safety standards, reducing fire risks in gas-prone areas.
Tinned Copper Construction: Resists corrosion for enhanced longevity.
Screened Design: Shields against electromagnetic interference and deters theft by making copper harder to access.
Operational Efficiency:
Energy Efficiency: Lowers resistance losses, reducing costs amid rising electricity prices.
Pilot Cores: Enable real-time monitoring to prevent overloads and extend equipment life.
Sustainability: Aligns with 2025 trends toward sustainable mining by boosting productivity, safety, and cost savings.
Installation Best Practices
To maximize performance and longevity:
Site Assessment: Match cable size to load requirements and avoid exceeding maximum tension or bending radius to prevent internal damage.
Support and Protection:
Use approved clamps/supports every 1-2 meters in vertical runs.
Protect against sharp edges with padding.
Underground Routing: Avoid high-traffic areas to minimize abrasion.
Connections: Use explosion-proof glands in hazardous zones.
Post-Installation Testing: Conduct continuity and insulation resistance tests to ensure reliability.
Maintenance Best Practices
To ensure a service life exceeding 10 years:
Regular Inspections: Check for cuts, swelling, or discoloration.
Cleaning: Use non-abrasive solvents.
Temperature Monitoring: Use infrared thermography to detect hotspots.
Theft Prevention: Integrate remote monitoring systems (e.g., Transnet’s satellite-based alerts).
Replacement and Storage:
Replace cables with 20% wear.
Store spares in dry, UV-protected areas.
Compliance: Follow SANS standards for all practices.
Usage Scenarios and Case Studies
Type 61A cables are versatile in demanding mining applications:
Underground Mining:
Power shuttle cars, continuous miners, and ventilation fans.
Open-Cast Mining:
Supply movable crushers and pumps, withstanding repeated flexing without failure.
