ZGRJ-400 - Earthing Resistance Monitor - Sichuan Zhongguang Lightning Protection Technologies Co., Ltd.

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	5000 mAH, 7.4 V
Solar panels	5 W, 18 V
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	0.01 Ω～20 Ω	± 2% rdg ± 3dgt (Auxiliary grounding resistance 100 Ω±5%, voltage to ground < 10 V)	0.01 Ω
	20 Ω～200 Ω		0.1 Ω
	200 Ω～2000 Ω		1 Ω

(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: 25 mA Max
	monitoring: 650 mA Max
	sending data: 1.42 A Max
Quality	Monitor: 3.5 kg
Overload protection	at the time of testing grounding resistance: AC 280 V/3 seconds between E-P and E-C ports
Insulation resistance	10 MΩ or more (500 V between circuit and case)
Waterproof level	IP 65
Pollution level	2

Configuration