Type 245 Flexible Rubber Mining Cable
The Type 245 Flexible Rubber Mining Cable is an extra-heavy-duty flexible cable purpose-built for the most severe high-voltage underground mining environments. It features finely stranded tinned copper conductors (class 5) for exceptional flexibility and corrosion resistance, EPR (ethylene propylene rubber) insulation for outstanding dielectric strength, thermal stability (90°C continuous rating), and resistance to moisture/heat, an overall tinned copper braid screen providing superior EMI protection and grounding, and an extra-heavy-duty flame-retardant rubber outer sheath engineered to endure extreme abrasion, crushing, impact, cutting, tearing, oils, chemicals, and repeated high-tension reeling/drag. Compliant with AS/NZS 2802 and rigorous mining safety standards, it supports very high tensile loads, frequent flexing, tight bending radii, and reliable operation in wet, dusty, and hazardous mine conditions. The Type 245 is specifically suited for high-power trailing applications in coal and metalliferous mines, powering longwall shearers, continuous miners, face conveyors, shuttle cars, and other critical high-capacity mobile equipment, delivering maximum safety, durability, and uptime.
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Voltage Rating
1.1kV - Type 245.1
3.3kV - Type 245.3
6.6kV - Type 245.6
Construction
Technical Specifications
Quality Control
Application
Construction
Type 245 Flexible Rubber Mining Cable Constrution
Conductor
Flexible stranded tinned annealed copper
Insulation
EPR (Ethylene Propylene Rubber)
Conductor Screen
Semi-conductive compound for cables having a voltage rating of 3.3kV and above
Insulation Screen
Semi-conductive elastomer
Central Extensible Pilot
EPR covered flexible stranded tinned copper
Cradle Separator
Semiconductive PCP (Polychloroprene)
Overall Core Screen
Semiconductive PCP (Polychloroprene) filling and covering
Interstitial Earth Conductor
Semi-conductive PCP (Polychloroprene) covered flexible stranded tinned copper
Reinforcing Braid
Open-weave yarns
Sheath
Heavy duty PCP (Polychloroprene). (CPE/CSP sheath can be offered upon request)
Sheath Colour
BIack
Manufacturer Standard
AS/NZS 1802:2003, AS/NZS 1125, AS/NZS 3808, AS/NZS 5000.1
Application
Type 245 Flexible Rubber Mining Cable is mainly used as a longwall shearer cable and for continuous miners in underground mining operations. It features three central pilot cores for earth continuity monitoring and control circuits, ensuring safe and reliable power supply.
Technical Specifications
Type 245 Flexible Rubber Mining Cable
Type 245 Flexible Rubber Mining Cable
|
No. Of Cores |
NOMINAL CONDUCTOR AREA mm2 |
CORE SCREEN | PILOT CONDUCTOR |
THICKNESS OF SHEATH mm |
NOMINAL OVERALL DIAMETER mm |
NOMINAL WEIGHT kg/100m |
||
|
STRAND SIZE No/mm |
AREA OF SCREEN mm2 |
STRAND SIZE No/mm |
THICKNESS OF COVERING mm |
|||||
| 3 | 16 | 69/0.25 | 1.8 | 28/0.25 | 0.8 | 4.1 | 42.6 | 235 |
| 3 | 25 | 91/0.25 | 1.8 | 28/0.25 | 0.8 | 4.2 | 43.4 | 269 |
| 3 | 35 | 140/0.25 | 1.4 | 28/0.25 | 0.8 | 4.4 | 45.6 | 315 |
| 3 | 50 | 120/0.30 | 1.0 | 28/0.25 | 0.8 | 4.8 | 48.4 | 390 |
| 3 | 70 | 180/0.30 | 1.0 | 28/0.25 | 0.8 | 5.1 | 53.9 | 501 |
| 3 | 95 | 150/0.30 | 1.0 | 28/0.25 | 0.8 | 5.6 | 60.4 | 630 |
| 3 | 120 | 185/0.30 | 1.2 | 28/0.25 | 0.8 | 6.0 | 65.5 | 765 |
| 3 | 150 | 235/0.30 | 1.2 | 28/0.25 | 0.8 | 6.3 | 70.5 | 915 |
| 3 | 25 | 91/0.25 | 1.5 | 28/0.25 | 0.8 | 5.2 | 51.1 | 338 |
| 3 | 35 | 140/0.25 | 1.0 | 28/0.25 | 0.8 | 5.4 | 54.5 | 388 |
| 3 | 50 | 120/0.30 | 1.0 | 28/0.25 | 0.8 | 5.7 | 56.8 | 490 |
| 3 | 70 | 180/0.30 | 1.2 | 28/0.25 | 0.8 | 6.0 | 61.2 | 592 |
| 3 | 95 | 235/0.30 | 1.2 | 28/0.25 | 0.8 | 6.4 | 66.6 | 739 |
| 3 | 120 | 300/0.30 | 1.2 | 28/0.25 | 0.8 | 6.7 | 71.0 | 870 |
| 3 | 150 | 375/0.30 | 1.2 | 28/0.25 | 0.8 | 7.0 | 79.2 | 1028 |
| 3 | 50 | 120/0.30 | 1.4 | 28/0.25 | 0.8 | 6.7 | 67.2 | 635 |
| 3 | 70 | 180/0.30 | 1.4 | 28/0.25 | 0.8 | 7.0 | 71.7 | 755 |
| 3 | 95 | 235/0.30 | 1.4 | 28/0.25 | 0.8 | 7.4 | 77.1 | 905 |
| 3 | 120 | 300/0.30 | 1.4 | 28/0.25 | 0.8 | 7.7 | 81.3 | 1050 |
| 3 | 150 | 375/0.30 | 1.4 | 28/0.25 | 0.8 | 8.0 | 85.8 | 1110 |
Quality Control
Type 245 Flexible Rubber Mining Cable
Raw Material Test
Raw Material Test for Type 245 Flexible Rubber Mining Cable ensures extreme heavy-duty mining quality and safety. The rigorous process includes: Supplier Certification Review: Verify class 5 tinned copper conductors meet AS/NZS 1125 or IEC 60228 for purity (>99.9% Cu), stranding, and tin coating; EPR insulation and extra-heavy-duty rubber sheath compounds certified to AS/NZS 2802 for superior flame retardancy, abrasion, crush, and impact resistance. Conductor Analysis: Test tinned copper for tensile strength (>200 MPa), elongation (>20%), conductivity (≥97% IACS), and tin layer uniformity to ensure corrosion resistance under prolonged wet/dusty/high-stress exposure. Insulation Testing: EPR insulation evaluated for tensile (>6.5 MPa), elongation (>300%), dielectric strength (>20 kV/mm), thermal aging (100°C/168h), hot set test (≤175% elongation after 200°C/15 min), and low water absorption for high-voltage reliability.
Process inspection
Process Inspection during manufacturing of Type 245 Flexible Rubber Mining Cable maintains extra-heavy-duty quality and mining safety. Steps include: Conductor Stranding: Monitor class 5 stranding for uniform lay length, compactness, and no loose strands using online gauges. Insulation Extrusion: Apply EPR insulation at controlled thickness; inline diameter scanners, eccentricity monitors, and spark testers detect voids or defects. Screening Application: Braid tinned copper with precise coverage (>80%) and tension control; real-time monitoring of braid angle and optical coverage for effective EMI protection. Outer Sheath Extrusion: Extrude extra-heavy-duty rubber sheath; continuous checks on thickness, surface finish, adhesion, and enhanced crush/abrasion properties.
Finished Product
Finished Product Test confirms the Type 245 Flexible Rubber Mining Cable meets stringent mining standards before shipment. The procedure includes: Visual & Dimensional Inspection: Examine full length for defects, uniformity, markings, and measure outer diameter/weight per meter. Electrical Tests: Conductor DC resistance, insulation resistance (>1000 MΩ·km), high-voltage withstand (e.g., 11kV for 3.6/6kV class/5 min), partial discharge, and screen continuity per AS/NZS 2802/IEC. Mechanical Evaluation: Bending radius (6–8× OD), tensile strength, extreme crush resistance, superior abrasion/tear tests, impact resistance, and dynamic flexing to simulate mining reeling. Sheath & Insulation Performance: Oil immersion, enhanced flame retardancy (AS/NZS 1660.5.1 or IEC 60332), thermal aging, impact resistance, and moisture resistance verified.
Application
The Type 245 Flexible Rubber Mining Cable excels in severe underground coal and metalliferous mining for high-voltage trailing/reeling power to longwall shearers, continuous miners, face conveyors, shuttle cars, loaders, and heavy face equipment requiring extra-heavy-duty, screened, flame-retardant cable with maximum mechanical protection and EMI shielding.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
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Wires and Cables packaging (7)
Wires and Cables packaging (8)
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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