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Phone: 400-027-8938

Mobile: 133 9714 9829

Product Details

■ Product Overview

Large-scale grounding grid resistance tester, capable of measuring substation grounding grids. (4 Omega 0) , thermal and hydroelectric power plants, microwave stations (10 Omega ) , lightning rod (10 Omega ) The multi‑purpose model incorporates a novel variable‑flow power supply and employs microcomputer‑based control and advanced signal‑processing techniques, effectively addressing electromagnetic interference during testing. , The experimental procedure has been simplified, enhancing the accuracy and reliability of the test results while significantly reducing both the labor intensity for testing personnel and the overall testing costs.

■ Technical Indicators

◆ Impedance Measurement Range :0~1000 Ω resolution :0.001m Omega

◆Measurement error : ± ( Reading x2%+0.005 Omega )

◆Test current waveform : Sine wave

◆Test current frequency :30-70Hz,0.5Hz Step

◆Output Current :0-3A/5A/10A/20A( Optional )

◆Maximum Output Voltage :400V

◆Measurement Line Requirements : Cross-sectional area of the copper conductor in the current-carrying wire 22.5mm ’Copper conductor cross-sectional area of the voltage line ≥ 1.0mm

 

■ Product Selection Specification Table

Product Selection Chart

Model number

Functional Parameters

NDDW-5A Large Ground Grid Ground Resistance Tester

5A、400V

  1. Ultra‑robust inverter‑based anti‑interference technology that effectively suppresses power‑line frequency interference from any substation on the national grid.
  2. The instrument offers high measurement accuracy and reliable data, is easy to operate, highly adaptable, and supports generator power supply.
  3. High security : Supports enclosure grounding protection, electric shock protection, 380V Input Protection ;
  4. Powerful functionality : Supports grounding detection for auxiliary electrodes, voltage probes, and current probes. ;

5. Supports measurements of grounding impedance, continuity, and soil resistivity. ;

NDDW-3A Large Ground Grid Ground Resistance Tester

  1. The measurement exhibits excellent power-frequency equivalence. The test current waveform is sinusoidal, and measurements are performed at two different frequencies.
  2. Strong resistance to ground‑potential interference. This instrument employs the heterodyne measurement method and incorporates advanced software‑ and hardware‑based filtering techniques, giving it excellent anti‑interference performance and ensuring stable, reliable test data. 15V Power frequency (50Hz) The error caused by interference voltage is only 0.001Q。

3. High accuracy. It can be used to measure large grounding grids with very low grounding impedance.

Keywords:

NDWR Series Large-Scale Ground Grid Ground Resistance Tester

Service system

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