In recent years, due to lightning strikes in multiple substations in China, these incidents have been caused by substandard grounding resistance of the grounding grid, which plays a role in working and protective grounding. The grounding resistance tester for grounding grids is an instrument used to measure the resistance value of grounding grids. It can accurately measure the grounding impedance, grounding resistance, grounding reactance, field surface potential gradient, contact potential difference, contact voltage, step potential difference, step voltage, transfer potential and other grounding characteristic parameters of large grounding grids. Let's briefly discuss the function and significance of the grounding resistance tester for the grounding grid
Its role and significance mainly include the following aspects:
1. Ensure the effectiveness of the grounding system:
The grounding resistance tester can be used to test the resistance value of the grounding system, thereby ensuring the effectiveness of the grounding system. A good grounding system can provide good grounding effect, reduce grounding resistance, reduce grounding voltage, and protect the safety of personnel and equipment.
2. Prevention of lightning strikes and ground resistance interference:
By testing the grounding resistance value, the resistance of the grounding system to lightning strikes and grounding resistance interference can be evaluated. A good grounding system can effectively introduce lightning current underground and reduce the impact on equipment, while also reducing the interference of grounding resistance on measurement and normal operation of equipment.
3. Maintenance and management of grounding system:
The grounding system may be affected by factors such as ground pulse, oxidation, humidity, etc. during use, resulting in an increase in grounding resistance value. The use of a grounding resistance tester can timely detect changes in the grounding network for maintenance and management.
4. Compliance with regulations and standards:
In some industry standards, regular testing of the resistance of the grounding system is required. The use of a grounding resistance tester can meet the testing requirements and provide measurement data for compliance testing.
Therefore, the role and significance of the grounding grid grounding resistance tester lies in ensuring the effectiveness of the grounding system, preventing lightning strikes and grounding resistance interference, maintaining and managing the grounding system, and meeting the requirements of relevant regulations and standards. Regular testing and testing can ensure the safe and reliable operation of the grounding system.
ZC-413 Grounding Grid Tester is suitable for testing power frequency grounding impedance, contact voltage, step voltage, transfer potential, surface potential gradient and soil resistivity of various grounding devices. The instrument adopts the technology of anti-jamming with different frequencies, and can accurately measure the data under the power frequency in the strong interference environment. The test current is small (maximum 5A), which will not cause the grounding device potential to be too high during the test. At the same time, it also has strong anti-interference ability, so it can be measured without power failure.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com