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partial discharge mining cable

4 Min Read
Role in Mining Distribution Hierarchy: Type 241 11/11kV serves as primary feeder distribution (second level below 22 kV transmission) in Andes copper mining: (1) 22 kV transmission line from surface substation → 22 kV/11 kV step-down transformer at pit rim or mine entrance, (2) 11 kV distributed to secondary substations throughout mining area (underground or surface), (3) 11 kV/3.3 kV or 11 kV/6.6 kV transformers supply individual equipment (shovels, draglines, mobile crushers). Type 241 3×120mm² is selected for routes requiring high current (>400 A nominal), allowing dual cables instead of 4–5 smaller cables. At 11 kV, current = P/(√3 × V × PF); a 5 MW load = 5,000 kW / (1.73 × 11 kV × 0.95) ≈ 278 A per phase. Using Type 241 3×120 (nominal 350–400 A capacity at sea level), single cable adequate, reducing installation complexity vs multiple smaller cables. Type 241 11/11kV充当采矿配电层级中一级馈电分配(低于22 kV传输)：(1)22 kV传输线从地表变电站 → 坑边或矿口22 kV/11 kV降压变压器、(2)11 kV配电至整个采矿区的二级变电站(地下或地表)、(3)11 kV/3.3 kV或11 kV/6.6 kV变压器供单个设备(电铲、索斗铲、移动破碎机)。Type 241 3×120mm²选用于需要高电流(>400A额定)的线路，允许2根电缆代替4-5根小截面电缆。在11 kV下，电流 = P/(√3 × V × 功率因数)；5 MW负载 = 5,000 kW/(1.73×11 kV×0.95) ≈ 278A每相。使用Type 241 3×120(海平面额定350-400A)、单根电缆足够、vs多根小截面电缆减少安装复杂性。
Technical Department
on09/03/2026

AS/NZS 1802 Type 241 11/11kV 3x120mm² High-Altitude Mining Cable for Chilean Copper Mines

Role in Mining Distribution Hierarchy: Type 241 11/11kV serves as primary feeder distribution (second level below 22 kV transmission) in Andes copper mining: (1) 22 kV transmission line from surface substation → 22 kV/11 kV step-down transformer at pit rim or mine entrance, (2) 11 kV distributed to secondary substations throughout mining area (underground or surface), (3) 11 kV/3.3 kV or 11 kV/6.6 kV transformers supply individual equipment (shovels, draglines, mobile crushers). Type 241 3×120mm² is selected for routes requiring high current (>400 A nominal), allowing dual cables instead of 4–5 smaller cables. At 11 kV, current = P/(√3 × V × PF); a 5 MW load = 5,000 kW / (1.73 × 11 kV × 0.95) ≈ 278 A per phase. Using Type 241 3×120 (nominal 350–400 A capacity at sea level), single cable adequate, reducing installation complexity vs multiple smaller cables. Type 241 11/11kV充当采矿配电层级中一级馈电分配(低于22 kV传输)：(1)22 kV传输线从地表变电站 → 坑边或矿口22 kV/11 kV降压变压器、(2)11 kV配电至整个采矿区的二级变电站(地下或地表)、(3)11 kV/3.3 kV或11 kV/6.6 kV变压器供单个设备(电铲、索斗铲、移动破碎机)。Type 241 3×120mm²选用于需要高电流(>400A额定)的线路，允许2根电缆代替4-5根小截面电缆。在11 kV下，电流 = P/(√3 × V × 功率因数)；5 MW负载 = 5,000 kW/(1.73×11 kV×0.95) ≈ 278A每相。使用Type 241 3×120(海平面额定350-400A)、单根电缆足够、vs多根小截面电缆减少安装复杂性。
6 Min Read
Project Magnitude: Rio Tinto's Oyu Tolgoi underground expansion is one of the world's largest block caving mine projects. The underground mine currently extends 1,300+ meters below surface, with expansion workings reaching 1,500+ meters depth. The power distribution network includes underground substations feeding: (1) Electric load-haul-dump (LHD) fleets, (2) Continuous mining equipment and drill jumbos, (3) Conveyor systems and material handling, (4) Dewatering pumps, (5) Ventilation systems. 力拓奥尤陶勒盖地下扩建是全球最大的自然崩落法矿井项目之一。地下矿山目前已延伸地表下1300多米，扩建工作延伸到1500多米深度。配电网络包括为以下系统供电的地下变电站：(1)电动铲运机(LHD)队，(2)连续采矿设备和凿岩台车，(3)传送带系统和物料处理，(4)排水泵，(5)通风系统。 11kV Primary Distribution Role: The 11kV distribution tier is the primary feeder for underground mobile substations, which then step voltage down to 3.3kV for equipment power circuits. Multiple 11kV feeders distribute power across different mining levels (extraction level, haulage level, ventilation shafts). Each feeder may be 500–2,000 meters long, running through risky terrain where cables experience mechanical stress from falling rock, ground movement, and environmental extremes.
Technical Department
on07/03/2026

Oyu Tolgoi Expansion: Ampacity and Mechanical Suitability of 11kV AS/NZS Mining Cables

Project Magnitude: Rio Tinto’s Oyu Tolgoi underground expansion is one of the world’s largest block caving mine projects. The underground mine currently extends 1,300+ meters below surface, with expansion workings reaching 1,500+ meters depth. The power distribution network includes underground substations feeding: (1) Electric load-haul-dump (LHD) fleets, (2) Continuous mining equipment and drill jumbos, (3) Conveyor systems and material handling, (4) Dewatering pumps, (5) Ventilation systems. 力拓奥尤陶勒盖地下扩建是全球最大的自然崩落法矿井项目之一。地下矿山目前已延伸地表下1300多米，扩建工作延伸到1500多米深度。配电网络包括为以下系统供电的地下变电站：(1)电动铲运机(LHD)队，(2)连续采矿设备和凿岩台车，(3)传送带系统和物料处理，(4)排水泵，(5)通风系统。 11kV Primary Distribution Role: The 11kV distribution tier is the primary feeder for underground mobile substations, which then step voltage down to 3.3kV for equipment power circuits. Multiple 11kV feeders distribute power across different mining levels (extraction level, haulage level, ventilation shafts). Each feeder may be 500–2,000 meters long, running through risky terrain where cables experience mechanical stress from falling rock, ground movement, and environmental extremes.