1.关于《商榷》文中提到的在校安点前重复接地的安全电压计算,是和校安点与重复接地及变压器的相对距离有关的问题,本人在撰写该文的过程中也做了简单分析,原文插图2中把重复接地极放在校安点后,就是考虑了这个问题,但在文中没有作重点叙述。实际上一条供电线路要带数十台用电设备,有的大型车间长达100～200米,所有用电设备都做重复接地是不可能的。最主要的是 1. The safety voltage calculation of repeated grounding prior to the school safety point mentioned in the “Shangluo” text is related to the relative distance between the school safety point and the repeated grounding and the transformer. I also wrote the article in the process of writing this article. After a simple analysis, the original text illustration 2 puts the repeated grounding pole at the school safety point, considering this problem, but it does not focus on the text. In fact, a power supply line needs to bring dozens of power-consuming devices, and some large-scale workshops are as long as 100 to 200 meters. It is impossible for all electrical equipment to repeat grounding. The main thing is