大地网\接地回流在线监测

大地网\接地回流在线监测适用于输电线路杆塔接地;气象防雷接地;石油化工接地;通讯接地;变配电站接地;铁路设施接地;建筑仓库接地;电气设备接地等场所。也可以用于接地线、金属线缆的防盗监测。

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Product Details

大地网\接地回流在线监测


 

系统概述

 

   变压器在线监测接地电阻智能监测系统采用基于模糊理论的加权算法,通过GPRS通讯网络,定时发送接地电阻监测结果,实现远程多点在线监测等。后台展现控制系统可以实时显示被测接地电阻数值,其自动记录存储的数据可以生成报表,方便保存、历史数据查询、打印、分析等。
 

适用范围

 

    适用于输电线路杆塔接地;气象防雷接地;石油化工接地;通讯接地;变配电站接地;铁路设施接地;建筑仓库接地;电气设备接地等场所。也可以用于接地线、金属线缆的防盗监测。

    可以单套安装使用,也可以组建成有线网络系统或无线网络系统使用。

 

技术参数


 



 

系统架构图

 

系统组网图


系统连接图

使用方法




   1、独立安装使用

 

   2、组建网络安装使用

   可以通过RS232、RS485或GPRS无线网络组建各种网络,实现远程监测。



 

应用场景


 

   1、输电线路铁塔接地

   它们通过架空地线连接,组成多点接地系统,检测非常方便,其等效电路见下右图。

 

 

    其中:R1为预测的接地电阻,R0为所有其它杆塔的接地电阻并联后的等效电阻,即R0=R2∥R3∥R4∥…∥Rn,若n越大(接地点越多),R0值越接近于0,远远小于R1,从工程角度可以视R0=0,这样,监测仪所得的数据就应该是R1的值。可以对每个杆塔都安装监测仪,同时测试各杆塔的接地电阻值或接地线防盗监测。

 


 

   2、机房、发射塔接地

   机房、发射塔接地在野外一般是独立的,将两者连接起来,构成二点回路,再安装监测仪,如下图。也可另做2个辅助接地极,用三点法监测。

 

 

   3、建筑物接地
 

   若R1~R6…Rn在地下是独立的接地体,没有连接在一起,构成多点接地系统,检测能非常方便检测接地电阻值。若R1~R6…Rn在地下是连接在一起的,则为单点接地系统,测试接地电阻按单点接地系统进行检测,直接安装即检测金属回路电阻,可以判断接地状况的好坏。

   对于大型的建筑地网,监测其接地状态——接地引下线与地网间的等电位值就可以了。因为这类大型地网,若接地出问题只会是接地引下线与地网间的连接处,所以监测判断等电位值是否合格即可。

 

 

典型配置


 

序号

设备名称

单位

数量

备注

1

JC-9000-GD-01智能在线监测IED

1

1U机架式

2

JC-OM203-GD变压器接地网状态监测装置

1

 

3

JC-OM203-GD/CT变压器接地网状态传感器

1

开口式传感器,尺寸可定制

4

后台系统软件

1

 

5

连接线缆

1

 

6

用户手册、保修手册、合格证

1

 

 

 

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