Ground Resistance Tester with Double Clamps

Model: GRT-300

Ground Resistance Tester with Double Clamps GRT-300 is an advanced ground resistance tester integrating multiple measurement methods. The instrument not only has the function of measuring the ground resistance with the traditional auxiliary pole, but also has the unique function of measuring the ground resistance without the auxiliary pole. It adopts large LCD gray screen backlight display and microprocessor technology, through the microprocessor control precision 4-wire method, 3-wire method and simple 2-wire method, selection method, double clamp method to measure the ground resistance test. With the design of large-caliber current clamp and the use of double clamp measuring technology, the on-line measurement is realized without the need to install auxiliary pole and isolate the grounding body from the equipment.

Ground Resistance Tester with Double Clamps GRT-300 is widely used in telecommunication, electric power, weather, computer room, oil field, power distribution line, tower transmission line, gas station, factory grounding network, lightning rod, etc.

Technical Data

Measuring Rang and Accuracy

Note 1: Reference conditions: accuracy with Rh Rs < 100Ω

Working conditions: Rh max＝3kΩ+100R＜50kΩ, Rs max＝3kΩ+100R＜50kΩ

Note 2: It depends on the measurement accuracy of R.

π=3.14, a: 1 m~100m

Ground Resistance Tester with Double Clamps GRT-300 is a stable and reliable tool for measuring grounding resistance, soil resistivity, DC resistance, ground voltage and AC current.

HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD, as a subsidiary of HAOMAI ELECTRIC POWER AUTOMATION CO.,LTD, located in Shenzhen of China, mainly focuses on the sales and services of Protection Relay Test Set, Instrument Transformer Test Set, CT/PT Analyzer, Power Transformer Test Set, Circuit Breaker Testing Equipment, Battery Testing Equipment, IEC 61850 Testing Equipment for Smart Substation, Partial Discharge Detector, Transformer Oil Dissolved Gas Analysis and Moisture Monitor etc. electrical test equipment and online monitoring equipment.

The headquarters, HAOMAI ELECTRIC POWER AUTOMATION is established in 1999 and located in Wuhan of China, which is specialized in developing and manufacturing electrical test equipment and online monitoring equipment. HAOMAI products are widely used in power grid, petrochemical, metallurgy, railway, coal mine, research institutes and all kinds of large-scale factories or enterprises.

HAOMAI follows total quality criteria, and always maintains standardized process and procedures for continuous growth. HAOMAI has been certified by ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. All of HAOMAI products passed Type Test or Calibration in the third party laboratory accredited under ISO/IEC 17025.

HAOMAI builds own RELAYSTAR laboratory and performance test laboratory, and possesses professional production equipment and testing instruments in factory, such as Agilent 34401A 6 1/2 High-precision Meter, FLUKE Multi-meter, EMH Standard Meter, CLOU Standard Power Source, Oscilloscope, Phase Meter, Insulation Test System, High Voltage Dividers, AC High Voltage Generator, Time Calibration Tester, Standard Micro-resistance etc.

HAOMAI is China well-known mark recognized and approved by State Administration for Industry & Commerce of People's Republic of China, and enjoys high reputation in domestic and foreign markets.

HAOMAI now is the key supplier for SGCC(State Grid Corporation of China) and CSG(China Southern Power Grid). Till 2021 HAOMAI products have been sold to 39 different countries.

HAOMAI always sticks to the faith of "cooperation and sharing", takes the "technology and market" as the direction, "creation and innovation" as the soul, listens to clients carefully, and improves the technology, upgrades the products, optimizes the service and tries all to be the global leader in electrical test and measurement instruments field.