Product introduction

NADWG 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. NADWG 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.

Also called name

Ground network earth resistance tester, Ground Resistance Tester, Earth Ground Resistance Tester, Grounding Resistance Tester

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 English 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

NADWG-3A

Substation Ground Resistance Tester NADWG-5A

Substation Ground Resistance Tester NADWG-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 AC180～220V，50/60Hz

Use of the environment Temperature：-10℃～50℃；Relative humidity：