标准摘要
[中文适用范围]： IEC 60287的本部分描述了计算安装在通风隧道中的所有电压电缆的连续电流额定系数的方法。该方法适用于任何类型的电缆。该方法适用于自然通风和强制通风。假设电缆内和隧道周围的纵向热传递可以忽略不计。假设隧道内的所有电缆都是相同的，并且假设隧道横截面不随沿隧道的距离而变化。 [外文原描述]： IEC 60287-2-3:2017 describes a method for calculating the continuous current rating factor for cables of all voltages installed in ventilated tunnels. The method is applicable to any type of cable. The method applies to natural as well as forced ventilation. Longitudinal heat transfer within the cables and the surroundings of the tunnel is assumed to be negligible. All cables are assumed to be identical within the tunnel and it is assumed that the tunnel cross-section does not change with distance along the tunnel.
英文名称Electric cables - Calculation of the current rating - Part 2-3: Thermal resistance - Cables installed in ventilated tunnels