ETCR2900 Earth Resistance Online Detector

Main Functions

On-line Monitoring Of Earth Resistance, Earth Voltage
Earth Resistance Measurement Range: 0.01Ω~2000Ω
Earth Voltage Measurement Range: AC 0V~600V
Communication Mode: RS485 communication
Alarm Function: Setting alarm threshold
Setting Monitoring Interval

Consult Immediately

Product Introduction
Technical Parameter
Model comparison
Data download

Product Introduction

ETCR2900 Earth Resistance On-line Detector, also known as earth resistance remote on-line tester, contact type earth resistance on-line detector, which is used for remote monitoring the earth resistance and earth voltage on-line. The detector adopt with simple two-wire method or precision three-wire method to test earth resistance, and the average value rectifier method is used to test the earth voltage and monitor it on-line in real time. The detector with RS485 communication. Users can secondary development and set up network to realize remote multi-point online monitoring according to the provided MODBUS communication protocol. It is suitable for power facility grounding, highway equipment grounding, meteorological lightning protection grounding, communication base station grounding, railway facility grounding, construction warehouse grounding and electrical equipment grounding, etc.
ETCR2900 Earth Resistance On-line Detector equip has LCD displayer, which can view the earth resistance value on site, set the alarm threshold value through the detector button, set the monitoring interval, and with sound and light alarm prompt.
1. The detector adopt with simple two-wire method or precision three-wire method to test the earth resistance, and average rectifier method to test the earth voltage.
2. RS485 communication.
3. Setting Alarm Threshold
4. Setting Monitoring Interval
5. Large display screen, the test result is clear and obvious.

Technical Parameter

1.Measurement Range & Accuracy

Measurement Function	Measuring Range	Accuracy	Resolution
Earth Resistance	0.01Ω~20Ω	±2%rdg±3dgt (Auxiliary earth resistance 100Ω±5%, earth voltage <10V)	0.01Ω
	0.1Ω~200Ω		0.1Ω
	1Ω~2000Ω		1Ω
Earth Voltage	0~600V AC	±2%rdg±3dgt	1V

2. Technical Specification

Power Supply	Standard: 12V DC (± 1V DC), 400mA Max (External power supply)
Data Display	4-digit LCD display
LCD Size	128mm×75mm;Display area:124mm×67mm
Measurement Mode	Precision three-wire measurement, simple two-wire measurement
Measure	Earth resistance: rated current pole-change method, measuring current 11mA Max, 128Hz; Earth voltage: average rectification
Earth Resistance Measurement Range	0.01Ω~2000Ω
Earth Voltage Measurement Range	AC 0V~600V
Data Mode	Average value
Measurement Indication	LCD countdown indication during measurement
Measurement Time	Earth voltage: about 2 times/second; earth resistance: about 30 seconds/time
Measurement Times	More than 10,000 times
Cable Voltage	Measurement of earth voltage: measurement below AC 600V
Detector Interface	Plug-in connection terminal : 9-pin terminal
Communication Mode	RS485 communication
Gear Shift	Automatic shift
Memory	99 groups, with a small number flashing and displaying the "99" symbol on screen to indicate that the storage is full
Interval Time	Automatic monitoring interval setting range: 1～999 hours
Data Access	Data access function: “MEM" symbol display
Overflow Display	Over-range overflow function: “OL” symbol display
Power Consumption	Standby: 25mA Max, measurement: 400mA Max
Alarm Prompt	Sound and light alarm
Alarm Setting	Detector panel button setting or Background software(developed) setting
Alarm Threshold Setting Range	Resistance：0Ω~2000Ω
Low Power Voltage Indication	When the power voltage is lower than 11V, the low power voltage symbol is displayed , remind to replace the power
Detector Size	190mm×117mm×54mm
Weight	About 450g
Overload Protection	During testing the earth resistance: AC 280V/3 seconds between the ports of E-P and E-C
Insulation Resistance	Over 10MΩ(500V between the circuit and the housing)
Withstand Voltage	AC 3700V/rms(Between the circuit and the housing)
Electromagnetic Characteristic	IEC61000-4-3, Wireless frequency electromagnetic field≤1V/m
Suitable Safety Standard	IEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529(IP54), Pollution level 2, CAT Ⅲ 300V
Working Temperature & Humidity	-10℃~40℃;Below 80%RH
Storage Temperature & Humidity	-20℃~60℃;Below 70%RH

Model comparison

Product Picture	Product Model Name	Resistance Range	Voltage Range	LCD Displayer	Alarm Function	Power Supply	Communication Metod
	ETCR2900 Earth Resistance Online Detector	0.01Ω~2000Ω	0~600V AC	Yes	Yes	DC 12V	RS485
	ETCR2900B Earth Resistance Online Detector	0.01Ω~2000Ω	0~600V AC	Yes	Yes	DC 12V	RS485 4G

Data download

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ETCR2900 Earth Resistance Online Detector

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