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【多选题】
电压互感器发生异常情况可能发展成故障时，下列哪些处理原则是正确的？（）
A.
不得用近控（就地）方法操作异常运行的电压互感器的高压隔离开关
B.
不得将异常运行电压互感器的次级回路与正常运行电压互感器次级回路进行并列
C.
不得将异常运行的电压互感器所在母线的母差保护停用或将母差改为非固定结线（差方式下）
D.
无法采用高压刀闸进行隔离时，可用开关切断该电压互感器所在母线的电源，然后隔离故障电压互感器
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