某元件导纳的有名值为Y=G+jB,当基准值功率为Sg,电压为U:时，电导的标幺值为(  )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69510' and id < 4503174 and id<>'4503174' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69510' and id > 4503174 and id<>'4503174' order by id asc limit 5