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cable heat dissipation

15 Min Read
The Type 2S 11kV 3x95mm² cable has a base ampacity of 285 amperes when installed in free air at 40°C ambient temperature. However, in a typical underground mine substation where three or more feeder cables are installed side-by-side on a cable ladder, the practical usable current is reduced to approximately 228 amperes through application of temperature and grouping derating factors. This 228 A figure is the number that should govern your design calculations and equipment sizing for the substation feeder. Type 2S 11kV 3x95mm² 电缆在 40°C 环境温度的自由空气中安装时，其基础载流量为 285 安培。但在地下矿山变电站中，三根或更多馈电电缆并排安装在电缆桥架上的典型情况下，通过应用温度和编组降额系数，实际可用电流减少至约 228 安培。这个 228 A 的数字应该管理您的设计计算和变电站馈电的设备选型。
Technical Department
on06/03/2026

Ampacity Derating: Sizing Type 2S 11kV 3x95mm² for Underground Mine Substations (Ambient 40°C)

The Type 2S 11kV 3x95mm² cable has a base ampacity of 285 amperes when installed in free air at 40°C ambient temperature. However, in a typical underground mine substation where three or more feeder cables are installed side-by-side on a cable ladder, the practical usable current is reduced to approximately 228 amperes through application of temperature and grouping derating factors. This 228 A figure is the number that should govern your design calculations and equipment sizing for the substation feeder. Type 2S 11kV 3x95mm² 电缆在 40°C 环境温度的自由空气中安装时，其基础载流量为 285 安培。但在地下矿山变电站中，三根或更多馈电电缆并排安装在电缆桥架上的典型情况下，通过应用温度和编组降额系数，实际可用电流减少至约 228 安培。这个 228 A 的数字应该管理您的设计计算和变电站馈电的设备选型。
15 Min Read
(N)TSCGEWÖU cable designation represents a specialized category of medium-voltage flexible power cables manufactured according to the stringent requirements of German standard DIN VDE 0250-813. These cables are specifically engineered for demanding applications in underground mining operations, tunnelling projects, and heavy industrial installations where conventional power cables would fail under the combined stresses of mechanical loading, chemical exposure, and harsh environmental conditions. The nomenclature follows German cable designation conventions where "T" indicates fine-stranded conductors for maximum flexibility, "SC" denotes semiconductive screening layers, "G" represents flexible insulation compound, "E" signifies earth conductors, "W" indicates oil-resistant properties, and "Ö" confirms oil and chemical resistance of the outer sheath.
Technical Department
on26/01/2026

Ampacity Derating: How Much Current Can (N)TSCGEWÖU Carry When Wound in 3 Layers on a Drum?

(N)TSCGEWÖU cable designation represents a specialized category of medium-voltage flexible power cables manufactured according to the stringent requirements of German standard DIN VDE 0250-813. These cables are specifically engineered for demanding applications in underground mining operations, tunnelling projects, and heavy industrial installations where conventional power cables would fail under the combined stresses of mechanical loading, chemical exposure, and harsh environmental conditions. The nomenclature follows German cable designation conventions where “T” indicates fine-stranded conductors for maximum flexibility, “SC” denotes semiconductive screening layers, “G” represents flexible insulation compound, “E” signifies earth conductors, “W” indicates oil-resistant properties, and “Ö” confirms oil and chemical resistance of the outer sheath.
12 Min Read
The thermal time constant represents one of the most critical parameters in determining the overload capability and dynamic rating of medium voltage power cables. For (N)TSCGEWÖU cables used in demanding mining, tunneling, and crane applications, accurate calculation of this parameter enables operators to safely maximize cable utilization during peak demand periods while avoiding thermal degradation of insulation materials. Understanding the thermal time constant provides essential insight into how quickly a cable responds to changes in electrical load and how long it can sustain temporary overload conditions without exceeding maximum permissible conductor temperatures. 热时间常数代表了确定中压电力电缆过载能力和动态额定值的最关键参数之一。对于用于要求苛刻的采矿、隧道和起重机应用的(N)TSCGEWÖU电缆,准确计算此参数使操作员能够在高峰需求期间安全地最大化电缆利用率,同时避免绝缘材料的热降解。理解热时间常数为电缆如何快速响应电负载变化以及它可以维持临时过载条件多长时间而不超过最大允许导体温度提供了重要见解。
Technical Department
on26/01/2026

Thermal Time Constant: Calculating Overload Capability of (N)TSCGEWÖU Cables

The thermal time constant represents one of the most critical parameters in determining the overload capability and dynamic rating of medium voltage power cables. For (N)TSCGEWÖU cables used in demanding mining, tunneling, and crane applications, accurate calculation of this parameter enables operators to safely maximize cable utilization during peak demand periods while avoiding thermal degradation of insulation materials. Understanding the thermal time constant provides essential insight into how quickly a cable responds to changes in electrical load and how long it can sustain temporary overload conditions without exceeding maximum permissible conductor temperatures. 热时间常数代表了确定中压电力电缆过载能力和动态额定值的最关键参数之一。对于用于要求苛刻的采矿、隧道和起重机应用的(N)TSCGEWÖU电缆,准确计算此参数使操作员能够在高峰需求期间安全地最大化电缆利用率,同时避免绝缘材料的热降解。理解热时间常数为电缆如何快速响应电负载变化以及它可以维持临时过载条件多长时间而不超过最大允许导体温度提供了重要见解。