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Email:info@launch-electric.com

Introduction

The system complies with DL/T621-1997 standards of Grounding of AC Electrical Equipment , used to test grounding system, connected resistance and soil resistivity of large power plants and substations. It makes up for the defect of traditional measuring approaches, offering complete test items and reliable test for large grounding system

• Multifunction: the system could test ground impedance of grounding system, as well as soil resistivity and connected resistance.

• Strong anti-interference ability: the system used variable frequency, avoiding interference of 50Hz power frequency. The anti-interference ability is very strong

• Flow injection frequency is adjustable, thus the system can acquire the frequency characteristics of the grounding system

• Output waveform is sine wave, waveform distortion<1%

• Large screen display of test data, test status, with real-time prompts

• The flexibility to set the test current, frequency range, auto / manual switch of voltage and current regulation

• High resolution, especially for large grounding grid (0.5Ω), the measurement accuracy is higher than similar products

• With over current, overheat protection function

Technical Parameters

• Input voltage；AC  220V 50Hz              

• Resolution：0.001Ω

• Output test voltage：0～1000V

• measuring accuracy：Grade 1.0

• Output test current ：0～10A                 

• Ambient temperature：-25℃～+50℃

• Frequency adjustment range：30～120 Hz       

• Humidity:≤90％

• Waveform deviation:  1％                   

• Altitude: ≤2000M

• Voltage stage test voltage：0～50V（or 0～100V）
  Output high current：0～100A（connected resistance measurement）
  measuring range：0.1～99.999Ω