Ground Resistance Tester is for Testing and Measuring



The ground resistance tester is a common instrument for testing and measuring ground resistance, and it is also an indispensable tool for electrical safety inspections and the acceptance of grounding projects. For large grounding grids, "ground resistance" exhibits a more obvious "complex impedance" nature, which includes both resistance and reactance components, so the concept of "ground impedance" should be adopted to replace "ground resistance". In power systems with higher voltage levels, the single-phase ground fault current increases significantly. The new version of DL/T475-2006 "Guide for Measurement of Grounding Device Parameters" specifies the measurement of items such as "field surface potential gradient", "touch voltage", and "step voltage".



HF8100(3A)/HF8150(50A) Large Grounding Grid Ground Resistance Tester is a dedicated instrument for measuring the characteristic parameters of grounding devices. The instrument uses frequency conversion anti-interference technology and can accurately measure in the strong interference environment of substations. The measurement results are displayed on a large-screen LCD, and a built-in micro printer can print out the results. It is suitable for testing grounding systems under construction or in operation in power plants, substations, distribution stations, buildings, etc.



Technical Parameters



Impedance Measurement Range: 1mΩ~1000Ω



Resolution: 0.001Ω



Measurement Error: ±(Reading×2%+0.005Ω)



Anti-Interference Capability for Power Frequency 50Hz Voltage: 10V



Test Current Waveform: Sine wave



Test Current Frequency: 45Hz, 55Hz dual frequency



Maximum Output Current: Internal power supply current 1~5A, External power supply current 0~50A



Maximum Output Voltage: Internal power supply voltage 0~400V, External power supply voltage 0~800V



Measurement Line Requirements: Current line copper core cross-sectional area ≥1.5mm2



Voltage line copper core cross-sectional area: ≥1.0mm2



Power Supply: AC220V±10%, 50Hz



Dimensions: 440×350×210



Instrument Weight: 10kg