The typical auxiliary system one - line diagram shown in Figure 10 -- 1 is a double - bus system.

图 10—1 所示的一般厂用电系统单线图是一种“双母线”系统.

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There are some problems about the secondary voltage switching between voltage transformers of double bus.

针对双母线电压互感器二次电压切换存在的问题,提出了电压软切换的新方法.

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