如果忽略变压器一.二次绕组的漏电抗和（ ）时，变压器一次侧电压有效值等于一次侧感应电势有效值，二次侧电压有效值等于二次侧感应电势有效值。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68476' and id < 4421226 and id<>'4421226' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68476' and id > 4421226 and id<>'4421226' order by id asc limit 5