Large Ground Resistance Tester for Large-Scale Ground Grid

Product Overview

Currently, the testing of grounding devices in China is relatively weak, with some key technical concepts being vague and technical methods being outdated. In response to this situation, China has formulated new industry standards.DL/T475-2006In compliance with the National Standard GB/T17949.1-2000The new standards bring significant changes to the old ones. To facilitate a wide range of field tests and researchers, we have developed this instrument based on these new standards, combining our years of practical experience in large ground network testing research.

Power Frequency Ground Impedance refers to the ratio of the potential difference between the zero point of potential at a distant location and the power frequency current flowing into the ground through the grounding device. Power Frequency Ground Impedance has traditionally been referred to as...“Industrial Frequency Ground ResistanceThis correction of the name, as per the National Standard GB/T17949.1-2000,Guidelines for Soil Resistivity, Ground Impedance, and Ground Potential Measurement of Grounding SystemsNo Chinese content provided..Routine measurements”As well as the standard for the electricity industryGuidelines for Measurement of Grounding Device Characteristic Parameters Revised DraftReplacing DL475-92Our new measurement instrument, utilizing alternating current for testing, refers to the measured values as grounding impedance, discontinuing the previous terminology.Ground Resistance。

This instrument is suitable for testing the power frequency impedance, contact voltage, step voltage, potential shift, ground surface potential gradient, and other power frequency characteristics of various grounding devices, as well as soil resistivity. Equipped with a frequency-hopping anti-interference technology, it can accurately measure power frequency parameters even in environments with strong interference.50HzThe following data. Test current is relatively low (0).～3.0AThe device will not cause an excessively high potential in the grounding equipment during testing, and it also hasExtreme..Please provide the Chinese content to be translated.High anti-interference capability, allowing for measurements without power interruption.

Key Features

3.1The measured power frequency equivalent performance is good. The test current waveform is a sine wave, measured using two frequencies.

3.2High anti-ground potential interference capability. This instrument utilizes the heterodyne method for measurement, complemented by modern hardware and software filtering technology, resulting in a high level of anti-interference performance and stable, reliable test data. 15VIndustrial Frequency (50Hz)The error caused by interference voltage is only 0.001Ω.。

3.3High precision. Suitable for measuring the small ground impedance of large ground networks.

3.4Robust and comprehensive, the device can measure all characteristic parameters of grounding installations as specified by relevant standards. It not only measures grounding impedance but also measures the resistive and reactive components.

3.5Equipped with a power failure alarm function, it prevents erroneous measurements.

3.6Simple operation. Full Chinese menu-style operation, directly displaying the measurement results.Equipped with a mini printer for on-site printing of measurement results.

3.7Low wiring labor required, no need for high current wires.

3.8This instrument is compact and lightweight, making it easy to carry.