NAJDT Ground Continuity Tester    NAJDT接地引下线导通测试仪

产品简介

接地装置的电气完整性是指接地装置中应该接地各种电气设备之间，接地装置的各部分及与各设备之间的电气连接性，即直流电阻值，也称为电气导通性。电力设备的接地引下线与地网的可靠、有效连接是设备安全运行的根本保障。接地引下线是电力设备与地网的连接部分，在电力设备的长时间运行过程中，连接处有可能因受潮等因素影响，出现节点锈蚀、甚至断裂等现象，导致接地引下线与主接地网连接点电阻增大，从而不能满足电力规程的要求，使设备在运行中存在不安全隐患，严重时会造成设备失地运行。接地装置的地下接地极及其连接部分也可能出现锈蚀、甚至断裂现象。因此，定期对接地装置进行电气完整性测试是很有必要的。

电力行业标准DL/T475-2006《接地装置特性参数测量导则》规定电气导通性应选用专门的仪器进行测量，仪器分辨率为1mΩ，准确度不低于1.0级。南澳电气（武汉）有限公司依据此标准研制的NAJDT-10A接地引下线导通测试仪是一种自动化程度很高的便携式测试仪, 专门用于接地装置的电气完整性测试，其各项技术指标均达到或优于相关标准要求。NAJDT-10A接地引下线导通测试仪操作简单方便、精度高、测试速度快，复测性好、读数直观，是符合规程要求的理想的仪器，大大方便了试验项目的开展，提高了工作效率。

NAJDT-10A接地引下线导通测试仪适用于适用于电力设备接地引下线与接地网（或相邻设备）之间导通电阻值的测量，同样适用于低阻值电阻的测量。

产品别名

接地引下线测试仪，接地引下线导通测试仪，接地导通电阻测试仪，接地导通测试仪，接地引下导线电阻测试仪

产品特性 

(1)电源技术：采用*电源技术，输出10A电流，能长时间连续工作，克服了脉冲式电源瞬间电流的弊端，可以有效的击穿触头氧化膜，得到良好的测试结果。

(2)抗干扰能力强：在严重干扰条件下，液晶屏*一位数据能稳定在±1个字范围内，读数稳定，重复性好。

(3)使用寿命长：全部采用高精度电阻，有效的消除环境温度对测量结果的影响，同时接插件的使用增强了抗振性能。

(4)操作简单：只需按下测量键即可得到测量结果。测量结果采用LCD液晶背光显示,读数直观,重复性好。

(5)携带方便：采用便携式设计，体积小、重量轻。面板与机箱成一体结构，具有很好的抗震性。

产品参数

测量范围	1～1999mΩ
分 辨 率	1mΩ
测量电流	DC 1A、2A、5A、10A 四个固定电流档位
测量精度	±（0.5%+2d）
测量半径	50m
显示方式	LCD背光显示
工作方式	连续
工作电源	AC220V ±10%
电源频率	50Hz
环境温度	-10℃～40℃
环境湿度	≤80% RH
体    积	300mm×270mm×200mm
重    量	5kg(不含附件)

 

Product introduction

The electrical integrity of earthing device is the electrical connectivity among all kinds of electrical devices that should be grounded or the electrical connectivity between ground equipment all parts and devices, it is DC resistance value; it is also known as electrical conductivity. Ground down lead and earth mat of electrical equipment reliable and effective connection is the fundamental guarantee of instrument safety operation. Ground down lead is the connection part of electrical equipment and earth mat. In the long-term running, the connection part may be rusty even ruptured due to moisture and other factors, which will cause the resistance increases which at connection point of ground down lead and the main earth mat, and thus cannot meet the requirements of electrical power regulations and standard. It also cause the instrument hides danger in work, seriously even cause the instrument run in lost ground status. Underground ground electrode and its connection parts may rusty, and even ruptured. Therefore, it is necessary to regularly do the electrical integrity test of grounding devices.

Electric Power Industry Standard DL/T475-2006 "Earthing Device Characteristic Parameters Measurement Guide" provides that the electrical conductivity should use special instruments to measure. The instrument resolution is 1mΩ; accuracy is not less than 1.0 . Based on this standard, our company designed this high degree of automation and portable tester. It is specially used to test the electrical integrity of earthing device; its technical specification has reached or exceeded the relevant standards. The instrument is characterized by simple operation, high accuracy, fast test speed, good reproducibility, and intuitive readings. It is an ideal special instrument that meets the requirements of regulations and standard.

Also called name

Ground Continuity Tester, Ground deflectors tester, ground deflectors conduction tester, ground resistance tester, earth continuity tester, ground resistance tester cited under the wire

The Characteristics of the products

1. Power technology: For latest power supply technology, the instrument outputs 10A current and can continuously work for a long time which overcomes the weakness of instantaneous current produced by pulsed power. It can effectively puncture the oxide of the switches and then get precise results.

2. Strong anti-interference ability: The last number of test data will stably show in the LCD screen only with ±1 error even in strong Interference situation.

3. Long service life: All the precise resistances used in the instrument can reduce the temperature's impact on the measurement results and military connectors can enhance vibration resistance.

4. Simple operation: just pressing "test" key, you can get the measured result. The LCD backlight display is easy for reading and has good reproducibility.

5. Convenience: Small size, light weight, and easy to carry. Panels and chassis is an organic whole that having good shock resistance.

The parameters of the products 

1. Measurement Range: 1～1999μΩ

2. Resolution: 1μΩ

3. Test Current: DC 1A, 2A, 5A, 10A.Four fixed current input selections.

4. Measurement Accuracy: ±(0.5%+2d)

5. Measuring Radius: 50 m

6. Display: LCD backlight display

7. Work Mode: Continuous

8. Power Supply: AC220V±10% 50Hz

9. Work Environment:

  Temperature: -10℃～40℃ Humidity: ≤80 %RH

10. Dimension: 300mm×270mm×200mm

   Weight: 5Kg(Accessories excluded)