ETCR3350 Large Scale Grounding Grid Earth Resistance Online Detector

Main Functions

On-line monitoring the large-scale grounding device earth resistance, grounding conduction, soil resistivity, step voltage, contact voltage, surface potential gradient, etc.
Grounding impedance measurement range: 0.000Ω~2000Ω
Soil resistivity measurement range: 0Ωm~125kΩm
Output current level: 1A~5A
Max. voltage output: 400V
Memory: data storage 1000 groups
Alarm function: setting alarm threshold
USB interface
Bluetooth communication

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Product Introduction
Technical Parameter
Model comparison
Data download

Product Introduction

ETCR3350 Large-Scale Grounding Grid Earth Resistance On-Line Monitor, also known as earth Grid grounding impedance on-line tester, earth Grid on-line tester, which is used for on-line monitoring of substation ground network, power plant, microwave station, communication base station and other large ground network grounding parameter. The monitor is powerful, can test power frequency character parameters of power frequency grounding impedance, grounding conduction resistance, soil resistivity, step voltage, contact voltage, and potential gradient, etc.
ETCR3350 Large-Scale Grounding Grid Earth Resistance On-Line Monitor is manufactured according to the JJG984-2004 Grounding Conduction Verification regulation, DL/T475-2006 Grounding Device Characteristic Parameters Measurement Guidelines, DL/T845.2-2004 Resistance measuring Device General Technical Conditions Part ll: Power Frequency Grounding Resistance Tester. The instrument has unique grounding pile, cable diagnostic function and self-checking function to ensure the accuracy of test result. And the instrument also adopt with super strong automatic frequency conversion anti-interference technology, match with 400V/5A high-power output can accurately measure the power frequency data of below 50Hz under strong interference environment.
ETCR3350 Large-Scale Grounding Grid Earth Resistance Tester has storage, time function,automatically record 1000 groups test result containing date & time, the instrument with Bluetooth communication that support Android system and RS485 communication, users can set up the wired network system or wireless network system to realize remote on-line monitoring the earth grid grounding system.
1.Comprehensive on-line monitoring the power frequency characteristic parameter of large grounding grid earth resistance.
2.Output current 1A~5A, voltage 400V，automatic frequency conversion and hardware and software filtering technology, which makes the instrument with max. anti-interference, ensuring the data stable and reliable.
3.With test function of current pile and voltage pile, which is used to diagnose the fault of poor connection of line contact and poor grounding between voltage pile and current pile.
4.Self-checking function, Equipped with 0.5Ω standard resistor for self-checking at any time to ensure the accuracy of the test result.
5.Alarm function: setting alarm threshold
6.Memory: data storage 1000 groups
7.Bluetooth communication
8.With RS845 communication realize remote on-line monitoring large grounding grid earth parameter.

Technical Parameter

Power Supply	AC220V±10％, 50Hz
Display Screen	5 inch touch color screen
Impedance Measurement Range	0.000Ω~2000Ω
Max. Solution	0.001Ω
Measurement Error	±2%rdg±5dgt
Soil Resistivity Measurement Range	0Ωm~125kΩm(Depending on the resistance measurement range and test length)
Soil Resistivity Measurement Accuracy	Depending on the measurement accuracy of R(ρ=2πaR; a:1 m~100m; π=3.14)
Anti-power Frequency Voltage Interference Ability	10V(50Hz)
Test Current Waveform	Sine wave
Test Current Frequency	Choose one or two frequency point between 40Hz and 60Hz
Max. Output Current	5A
Output Current Level	1A, 2A, 3A, 4A, 5A
Max. Output Voltage	400V
Measuring Line Requirement	The cross-sectional area of the copper core of the current line ≥2.0mm2; the cross-sectional area of the copper core of the voltage line ≥1.5mm2
Overall Size	450×296×280mm
Instrument Weight	Host weight: about 26kg, total weight: about 37.6kg (include accessory)
Memory	1000 groups
Communication Function	RS485 interface, data upload function
Bluetooth Communication	Support Android system
Withdraw Voltage	AC 3700V/rms(Between the circuit and the housing)
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	Max Output Voltage	Max Output Current	Frequency	Communication Method	Others
	ETCR3300B Large Scale Grounding Grid Earth Resistance Tester	0Ω～2000Ω	400V	5A	40Hz~60Hz	USB Bluetooth	Printer
	ETCR3350 Large Scale Grounding Grid Earth Resistance Online Detector	0Ω～2000Ω	400V	5A	40Hz~60Hz	485 Communication Bluetooth

Data download

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ETCR3350 Large Scale Grounding Grid Earth Resistance Online Detector

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