NRDWG Series Substation Ground Resistance Tester

NRDWG Series Substation Ground Resistance Tester

Classification: Earthing/Insulation/SF6 Gas Detection

Reference standard: GB/T17949.1-2000,DL/T475-2006

Verification:  View the certificate

Instructions:  DOC Instructions

  PDF Instructions

Tel: 027-87207771 87207772 87207773 87188862

Verification certificate
Product introduction

NRDWG Series Substation ground resistance tester can test grounding impedance, the contact voltage, step voltage, the diverting potential of all kinds grounding device, and the potential gradient field of surface parameters such as frequency and soil resistivity. NRDWG Series Substation ground resistance tester uses different frequency interference technology, strong interference environment can be measured accurately the data frequency 50Hz. Test current is (0 ~ 3.0A), does not improve potential of grounding device, but it also has strong anti-interference ability, it can measurement without the power cut.

Alternative name

Ground network earth resistance tester, Ground Resistance Tester, Earth Ground Resistance Tester, Grounding Resistance Tester,Grounding Resistance Tester for Large Grounding Grid

The Characteristics of the products
1、Good measurement of power frequency equivalence. Test current waveform is a sine and two frequencies used in measurement.
2、Anti-interference ability ground voltage. The instrument uses different frequency measurement, with modern hardware and software filtering technology, making the instrument has a very high anti-jamming performance, stable and reliable test data. 15V power frequency (50Hz) interference voltage error caused only 0.001Ω.
3、High precision. Used to measure ground impedance small large ground network.
4、And powerful. Measurable standards prescribed all the features of the grounding device parameters. Not only measure ground impedance, also measure the resistance component and the reactance component.
5、With the break alarm function, to avoid erroneous measurements.
6、Simple operation. Full Chinese menu operation, directly showing the measurement results, and comes with mini printer can print on-site measurements.
7、The wiring labor is small, no large current line.
8、Small size, light weight, easy to carry.
The parameters of the products
Project parameters
Model
NRDWG-3A

Substation Ground Resistance Tester

NRDWG-5A

Substation Ground Resistance Tester

NRDWG-5B

Substation Ground Resistance Tester

An impedance measuring range
0~15Ω
0~50Ω
0~5000Ω
Resolution
0.001Ω
0.001mΩ
The measurement error
±(reading×1% + 0.001Ω)
±(reading×2 % + 0.005Ω)
±(reading×2 % + 0.01Ω)
Hnti-interference

ability of ground voltage

15V power frequency interference

 voltage error caused only 0.001Ω

Anti-frequency: 50Hz

Interference voltage: 10V

Anti-frequency: 50Hz

Interference voltage: 10V

The test current waveforms
sine
sine
sine
The test current frequency
-
45Hz、55Hz dual-frequency


45Hz、50Hz、55Hz、60Hz、65Hz Single Frequency;
45/55Hz、55/65Hz、47.5/52.5Hz Automatic dual-frequency


The output current
0~3.0A
0~5.0A
1A、2A、3A、4A、5.0A
The output voltage
0~100V
0~420V
0~400V
The measurement

line requirements

 The sectional area of copper 

core of current lines ≥1.0mm2

 The sectional area of copper
 core of current lines ≥1.5mm2
 The sectional area of copper
 core of current lines ≥1.5mm2
The sectional area of copper core
 of voltage lines≥0.2mm2 
The sectional area of copper core

of voltage lines≥1.0mm2 

The sectional area of copper core

of voltage lines≥1.0mm2 

Power supply
AC220V±10%,50Hz
AC180220V,50/60Hz
Use of the environment
Temperature:-10℃~50℃;Relative humidity:<90%
Dimension
440mm×350mm×310mm
440mm×350mm×210mm
320mm×285mm×285mm
Weight
6.0kg
18kg
18kg


Power supply: AC110V/115V/120V/127V/220V/230V/240V optional
Input frequency: 50Hz/60Hz optional
Note: The users can select the corresponding power which based on their local supply voltage and frequency, and we will confirm it before the delivery (or inform us that the goods will be used in which country advance)

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