Grounding Resistance Tester | Grounding Terminal Resistance Test

The WB2678A Grounding Resistance Tester is a high-precision, dedicated testing device developed by LISUN for the safety inspection of electrical equipment grounding systems. By outputting a standard test current of 10A/25A to simulate the actual operating conditions of grounding systems, it quickly evaluates the conduction performance and safety reliability of grounding loops, promptly identifies hazards such as poor grounding and excessive contact resistance, and provides critical safety protection for electrical equipment against electric shock and lightning strikes.

The WB2678A Grounding Resistance Tester features a dual-current range design (10A/25A), adapting to the grounding testing needs of equipment with different power ratings. Equipped with three-window simultaneous LED display technology, it can real-time present three core parameters: grounding resistance, test current, and test time, allowing users to grasp the test status without switching interfaces. Additionally, it has flexible functions such as 1~99S timed testing, preset threshold alarm, and manual start/stop, with a simple operation logic.

Specifications：

Applications:

• Home Appliance Industry: Testing of grounding terminal resistance for power plugs of home appliances such as rice cookers, washing machines, and air conditioners (10A range, 0~600mΩ). It complies with GB 4706.1-2024/IEC 60335-1:2023, verifying the grounding reliability of home appliances and preventing electric shock risks.
• Lighting Industry: Grounding terminal resistance testing for LED outdoor lights, stage lights, and emergency lighting fixtures (25A range, 0~200mΩ). It meets GB 7000.1-2023/IEC 60598-1:2024, ensuring grounding safety of lighting fixtures in humid/outdoor environments.
• Information Technology Equipment Industry: Grounding system testing for IT equipment like servers, routers, and printers (10A range). It is compatible with GB 4943.1-2022/IEC 60950-1:2023, preventing internal component damage due to equipment leakage or impacts on data security.
• Medical Equipment Industry: Protective grounding resistance testing for small medical monitors and physiotherapy devices (25A range, strictly controlled within 200mΩ). It conforms to GB 9706.1-2020/IEC 60601-1:2020, meeting the stringent grounding safety requirements of medical equipment.
• Industrial On-site Testing: Grounding loop testing for factory motors, frequency converters, and distribution boxes (10A/25A range selected as needed). With reference to GB 50169-2016/IEC 60364-6:2020, it ensures good grounding conductivity of industrial equipment during high-load operation.
• Power Facilities Testing: Spot testing of grounding resistance for small distribution rooms and outdoor distribution boxes (25A range). It evaluates the lightning protection and leakage prevention capabilities of grounding systems, avoiding safety accidents caused by lightning strikes or equipment failures.
• Laboratories and Quality Inspection Institutions: Grounding performance verification during the R&D phase of electrical products, and grounding compliance testing by third-party inspection institutions. High precision and repeatability meet the requirements for authority and traceability of test data.

Grounding Resistance Tester - Introduction Video