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三相电表的使用和安装标准有什么?

Release date: View count:488

 

  三相电表是一种比较复杂的电表,一般是用于大型的工厂和商城等设施当中。因为需要计量大量的用电,所以电表的精度是很重要的。下面小编来介绍一下三相电表的使用和安装标准有什么?

  一.三相电表如何使用?

  1、电表在出厂时经检验合格,并加封铅印,可安装使用,如无铅封或贮存过久,应请有关部门重新校验加封,方可安装使用。

  2、电表应垂直、不倾斜安装在干燥通风的地方,安装电表的底板应固定在坚固耐火,不易振动的墙上,电表高度约1.8m左右。

  3、按线路图接线,拧紧接线螺钉,并紧固一下端扭盒内连接板。

  4、经互感器接入式电表其示数须乘以变比后,才是实际电能数。

  5、一表一卡:用户持有的IC卡不能互换,遗失时应到供电部门(即售电处)补购一张。

  6、购电准备:用户须将IC卡插入卡座一次,便于将表内数据送回计算机数据库。

  7、购电方式:售电时,将IC卡插入IC卡读写器,同时操作计算机,将用户编号,预购电量,限容方式及限定功率等加密写入IC卡。

  8、电卡使用:将购电卡插入卡座内,如是有效卡,则电表自动将数据读入表内,LCD表显示屏依次显示:购电量、总购电量、电表次数、报警电量、赊欠限量、限容功率。

  然后取卡,妥善保存电卡。

  9、运行显示:电表运行过程中,液晶屏轮流显示表内剩余电量及总用电量。

 三相电表的使用和安装标准有什么?

    二.三相电表有什么安装标准?

  1、安装的地方不能有腐蚀性的气体和液体以及周围不能有强烈的撞击,选一个相对比较安全的地方,电表的运行温度不能超过50摄氏度,避免阳光直射,可以加长电表的使用寿命。

  2、电表安装应该装在专用的电表箱内,安装高度一定要符合规范,在电表箱内安装的电表离地面不能小于1米,悬挂式电表箱内安装的电表离地不能小于1.8m,三相电表的安装都必须按照这个规定来。

  3、电能表与电流、电压之间的回路应接有联合接线盒,这样可以减少工作人员故障查询的所要消耗的时间。

  4.电压电流互感器必须选用规格一致的产品,必须是正规厂家生产的,劣质产品很容易引起线路短路,连接点一定要牢牢紧固,防止断电,互感器一定装在一个电表箱之内,一定要做好防偷电措施。

  5.用于远程采样的电子电表,远程采样的电子电表一定要安装好系统,便于数据的采集,信号线必须采用用屏蔽双绞导线,架设信号线时将屏蔽导线的单端接地,这样可以提高通信的可靠性。

  6.要是有金属结构的电表箱,表箱和高压互感器的外壳都一定要接地,因为金属电表箱会导电,导致计量不准,接地线要采用铜芯导线,其线径不能小于2.5平方毫米

  以上就是本篇文章的全部内容,如果您想要了解更多关于三相电表的相关知识,请关注本网站!

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