【判断题】
直流回路两点接地可能造成断路器误跳闸
A. 对
B. 错
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答案
A
解析
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【判断题】
发电机变压器组的过激磁保护应装在机端，当发电机与变压器的过激磁特性相近时，该保护的整定值应按额定电压较低的设备(发电机或变压器)的磁密来整定，这样对两者均有保护作用
A. 对
B. 错
【判断题】
微机继电保护装置在运行中要切换定值区时，应由继电保护人员按规定的方法改变定值，此时必须停用继电保护装置，但应立即打印（显示）出新定值，并与主管调度核对定值
A. 对
B. 错
【判断题】
为了使不同中性点接地方式系统在发生接地故障时，电压互感器开口三角所得3U0均不大于100V，对于中性点接地系统（如110KV及以上），电压互感器变比选为UI（相）/UⅡ（相）/100伏，对于中性点不接地系统（如10.5KV），电压互感器变比选为UI（相）/UⅡ（相）/100/3伏
A. 对
B. 错
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