数字接地电阻测试仪主要的作用是什么

2025-02-08 01:20:52
推荐回答(2个)
回答1:

产品概述

优良的接地系统是电力、电信、电气设备安全可靠运行的重要保证。接地电阻大小是接地系统品质优劣的评判依据。精确、快速、简捷、可靠的接地电阻测量方法,已成为防雷接地领域内技术进步的迫切需要。
ED4004型双钳多功能接地电阻测试仪适用于电信、电力、气象、机房、电力配电线路、铁塔输电线路、加油站、工厂接地网、避雷针等。

主要特点

◆双钳法/地桩法双重测量方式:适合任意接地场所,多点或单点接地,都可正常测试;
◆抗干扰能力强:自产生高频电流,从而过滤市电中50Hz、100Hz等谐波干扰电流,即使在500KV变电站环境下,也能精确测量;
◆测量范围广、分辨率高:量程从0.01Ω~1000Ω,分辨率0.01Ω,对0.7Ω以下接地电阻,也能准确测量;
◆大钳口设计:钳口直径50mm(标准配置),满足用扁铁/钢作接地引线的情况,特殊钳口尺寸可按客户要求定制;
◆大容量数据存储:可储存200组测量数据;
◆操作简单,单人作业:全中文操作界面、体积小、重量轻,防爆便携箱,野外测量携带方便。

技术参数

◆接地电阻测量范围:
◆双钳法:0.01Ω~1000Ω
◆地桩法:0.01Ω~1000Ω
◆误差:
◆双钳法:±2%±2个字
◆地桩法:±1.5%±2个字
◆最小分辨率:0.01Ω
◆钳口尺寸:Φ50mm
◆存储容量:200组数据
◆工作温度:0°C~+50°C
◆电源:8节5号镍氢充电电池或普通AA电池
◆重量:0.8KG(含电池)
◆尺寸:265mm×130mm×65mm

回答2:

数字式接地电阻测试仪专为现场测量接地电阻而精心设计制造的,采用最新数字及微处理技术,3线或2线法测量接地
电阻,具有独特的线阻校验功能、抗干扰能力和环境适应能力,确保长年测量的高精度、高稳定性和可靠性。其广泛应用于电力、电信、气象、油田、建筑、防雷及工业电气设备等的接地电阻测量。
主要特点

(1)
结构上采用高强度铝合金作为机壳,电路上为防止工频、射频干扰采用锁相环同步跟踪检波方式并配以开关电容滤波器,使仪表有较好的抗干扰能力。

(2)采用DC/AC变换技术将直流变为交流的低频恒定电流以便于测量。

(3) 允许辅助接地电阻在0~2KΩ(RC),0~40KΩ(RP)之间变化,不致于影响测量结果。

(4)本仪表不需人工调节平衡,3(1/2)位LCD显示,除测地电阻外,还可测低电阻导体电阻、土壤电阻率以及交流地电压。

(5)如若测试回路不通表头显示“1”代表溢出,符合常规测量习惯。

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