Yangzhou Topu Electric Technology Co., Ltd. provides a large grounding resistance tester for the grounding network, with technical parameters of TP-HVDWR_

A large-scale grounding resistance tester for substations (4 Ω), hydro thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω). It uses a new type of AC constant current and constant voltage power supply with different frequencies, and adopts measures such as microcomputer processing control and signal processing to effectively solve the anti-interference problem in the testing process, simplify the experimental operation process, improve the accuracy and precision of the test results, and greatly reduce the labor intensity and testing cost of the testing personnel.

At present, in the power system, the grounding resistance of large grounding grids is mainly measured using the power frequency high current three pole method. In order to prevent power frequency interference during the operation of the power grid and improve the accuracy of measurement results, the insulation preventive test regulations stipulate that the test current of the power frequency high current method shall not be less than 30 amperes. As a result, there are many problems such as bulky testing equipment, complex testing processes, high workload of testing personnel, and long testing times.

Product Features

1. The equivalence of measurement is better than that of power frequency measurement.

2. Adopting an AC constant current constant voltage pure frequency power supply, it can automatically adjust and measure without setting parameters, and has strong resistance to ground voltage interference. This instrument adopts the frequency difference method for measurement, collects the frequency on site, and uses modern software and hardware filtering technology to ensure stable and reliable test data. No need for power outage detection.

3. High precision. Specially designed to measure large grounding grids with very low grounding impedance.

4. Equipped with a disconnection display function, it avoids erroneous measurements.

5. Easy to operate. Fully Chinese menu style operation, directly displaying measurement results.

6. This instrument is small in size, light in weight, and easy to carry.

Technical Specifications

1. Instrument measurement range: 0-40 Ω

2. Measurement accuracy:<3%

3. Measure output current: AC ≤ 5A

4. Circuit resistance: 0-2000 Ω

4. Measurement line requirement: ≥ Φ 1.5mm2

5. Power supply: AC220V/50HZ

Information organization: Yangzhou Topu Electric Technology Co., Ltd