问题
问答题 简答题
哪些情况应断开BZT联动开关？
答案
参考答案：
1）工作电源与备用电源同时运行时。
2）工作与备用电源任一侧有检修或停电时。
3）工作母线停电前。
4）联动回路发生故障或存在缺陷时。
5）备变供其它段无备用容量时。
6）备用电源进线开关运行时。
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哪些情况应断开BZT联动开关？
参考答案：
1）工作电源与备用电源同时运行时。
2）工作与备用电源任一侧有检修或停电时。
3）工作母线停电前。
4）联动回路发生故障或存在缺陷时。
5）备变供其它段无备用容量时。
6）备用电源进线开关运行时。
| 用所给词的适当形式填空，其中有两项多余。 | |
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| There are a lot of trees around us. The trees can help to make the air 1 and cleaner. They can also help to 2 the weather. They provide(提供) humans with food, 3 , medicine and other things. Because of the trees, many animals can live 4 the earth. But people often cut trees down in large numbers. The forests are becoming much 5 than before, so we should protect them well. |