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To parallel an incoming machine to a running machine therefore it is necessary to ensure firstly tha...

To parallel an incoming machine to a running machine therefore it is necessary to ensure firstly that ______.
  • A. two frequencies must be brought into phase
  • B. the incoming machine accepts a small amount of load
  • C. the running machine must be unload
  • D. both voltages are equal
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相关试卷

第一章 船舶概论
第二章 船舶电气
第三章 轮机自动控制技术
第四章 船舶计算机网络
第五章 通信与导航设备
第六章 船舶管理