NADWG Series Substation Ground Resistance Tester
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, NADWG Series Substation Ground 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：<90% Dimension 440mm×350mm×310mm 440mm×350mm×210mm 320mm×285mm×285mm Weight 6.0kg 18kg 18kg