在变压器的零序等值电路中，(   )的绕组端点与外电路断开，但与励磁支路并联。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69519' and id < 4503783 and id<>'4503783' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69519' and id > 4503783 and id<>'4503783' order by id asc limit 5