ZGRJ-400 Earthing Resistance Monitor
General
The system is composed of monitors, solar panels, temperature and humidity sensors, monitoring software. The shell material has the characteristics of high and low temperature resistance, corrosion resistance and flame retardancy, to ensure high accuracy, high stability, and high reliability for long-term online monitoring in the field and indoors. The monitor can receive server instructions, modify the monitoring time interval, and transmit the test data to the backend server. Reports are generated by the backend server, which is convenient for saving historical data for query, printing and analysis.
Used on transmission line towers and communication towers, it can automatically monitor the grounding resistance of the towers, the soil temperature and humidity data online. Then send them to the backend server through GPRS communication. The monitoring time and frequency can be set according to customer requirements.
Standards Complied IEC61010-4-3, IEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529
Operating Environment
| Lithium battery |
5000mAH，7.4V |
| Solar panels |
5W, 18V |
| Temperature |
-40 ℃～55 ℃ |
| Relative humidity |
≤80 % |
| Atmospheric pressure and altitude |
86 kPa～106 kPa |
Product Configuration (Standard Configuration)
| Name |
Quantity |
Unit |
Remarks |
| Monitor |
1 |
Set |
|
| Electrode |
2 |
Set |
|
| Cable |
1.5 |
meter |
AVR*4 |
| Cable |
1.5 |
meter |
AVR*2 |
| BVR wire |
150 |
meter |
0 meters each for red, blue and black |
| Temperature and humidity sensor |
1 |
Set |
|
| Monitoring service software |
1 |
Set |
One set for one project |
| WEB software |
1 |
Set |
One set for one project |
Performance Index
| Monitoring function |
Measuring range |
Accuracy |
Resolution |
| Earthing Resistance |
0.01Ω～20Ω |
±2%rdg±3dgt
(Auxiliary grounding resistance 100Ω±5%, voltage to ground <10V) |
0.01Ω |
| 20Ω～200Ω |
0.1Ω |
| 200Ω～2000Ω |
1Ω |
(Note: 23℃±5℃, below 75%rh)
Technical Specifications
| Function |
online monitoring the grounding resistance, soil temperature and humidity of power transmission towers. |
| Monitoring way |
accurately three-line monitoring |
| Monitoring method |
grounding resistance: rated current pole-changing method, monitoring current 11mA Max, 128Hz
voltage to ground: average value rectification |
| Data pattern |
average value |
| Monitoring time |
grounding resistance: about 120 seconds (4 times) |
| Number of monitoring |
10000 times or more |
| Communication method |
GPRS communication |
| Data storage |
save the monitoring data on the device, store 100 pieces of historical data, and update it cyclically |
| Data transmission |
at the end of each monitoring, the monitoring data will be transmitted to the backend server by GPRS communication |
| Interval time |
can be set, automatically monitoring interval time setting range: 1 ~ 999 hours |
| Power consumption |
standby: 25mA Max |
| monitoring: 650mA Max |
| sending data: 1.42A Max |
| Quality |
Monitor: 3.5Kg |
| Overload protection |
at the time of testing grounding resistance: AC 280V/3 seconds between E-P and E-C ports |
| Insulation resistance |
10MΩ or more (500V between circuit and case) |
| Waterproof level |
IP65 |
| Pollution level |
2 |
Configuration
