单选题：GIS上的感应电压不应危及人身和设备的安全，在故障条件下，GIS外壳的感应电压不应大于下列何值?（　　）

题目内容：

GIS上的感应电压不应危及人身和设备的安全，在故障条件下，GIS外壳的感应电压不应大于下列何值?（　　） A．100V
B．60V
C．30V
D．24V

参考答案：

答案解析：

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