使⽤说明书DTSY858型三相四线预付费电能表产品安装使⽤前,请仔细阅读使⽤说明书,并妥善保管,以备查阅。DTSY 型三相预付费电能表使用说明 目录一、概述 3二、参考标准和规范...................................................................................................................................... 3三、工作原理...................................................................................................................................................33.1 工作原理说明...........................................