backup relay

基本解释

Each set of backup relays will be provided with a separate timing relay that will provide time trip for zone 1, 2 and 3.
将在每套后备继电器上安装一只独立的计时继电器，该继电器应能在第一、第二与第三区进行定时跳闸。
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Backup flames, also lit from the birthplace of the ancient games in Olympia, Greece, are with the relay at all times to relight the torch.
为重新点燃火炬，整个传递工程中一直携带着备份火种，备份火种也是在古代奥运会的发源地-希腊奥林匹亚点燃的。
Based on the directed graph of primary relay and backup relays coordination relationships, a new method to determine the minimum break point set(MBPS)by graph simplification is proposed in this paper.
基于保护主后备配合依赖关系有向图，提出了通过有向图化简计算保护配合最小断点集（MBPS）的新方法。