对于双母线接线方式的变压所，当某一连接元件发生故障瓦斯断路器拒动时， 失灵保护动作应首先跳开(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69480' and id < 4501516 and id<>'4501516' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69480' and id > 4501516 and id<>'4501516' order by id asc limit 5