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问题 单项选择题

对范围Ⅱ系统，现场进行断路器开断空载线路的试验中，应要求电源对地电压为( )，断路器不发生重击穿。

A．1.1p.u.；
B．1.2p.u.；
C．1.3p.u.；
D．1.4p.u.。

答案

参考答案：C

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