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问题21《规范》第14.1.8条“二级负荷宜由双回线路供电;对于电梯及其他距离变电所不超过半个站台有效长度的负荷,可采用双电源单回线路专线供电”。这里“双回线路供电”的具体含义是什么?另外,当仅在车站一端设置一个变电所时,车站另一端出入口处的自动扶梯离变电所较远,若采
Question 21 “Specifications” Article 14.1.8 “two load should be double-circuit power supply; for elevators and other distance substations not more than half of the effective length of the station load, dual-supply single-line power line.” What is the specific meaning of “double circuit power supply” here? In addition, when only one substation is installed at one end of the station, the escalator at the other end of the station is far away from the substation.