WB2678A Grounding Resistance Tester
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The WB2678A Grounding Resistance Tester is a precision measurement instrument engineered for compliance verification of electrical equipment grounding systems. By generating standardized test currents of 10A or 25A to simulate operational conditions, this instrument quantifies the conductive performance and safety integrity of grounding circuits. It facilitates rapid identification of non-conformities including insufficient grounding and elevated contact resistance, thereby providing essential protection against electrical shock hazards and lightning strike damage.
The WB2678A Grounding Resistance Tester incorporates a dual-current range configuration (10A/25A) to accommodate varying power rating requirements across equipment classes. Featuring triple-window LED display technology, the instrument simultaneously presents three critical parameters: grounding resistance, test current magnitude, and elapsed test duration, enabling continuous monitoring without interface navigation. Additional functionality includes programmable test timing (1-99 seconds), configurable threshold alarms, and manual control initiation/termination, all implemented through an intuitive operational interface.
Technical Specifications:
- Grounding Resistance Measurement Range: 0-200mΩ (25A), 0-600mΩ (10A)
- Test Current Output: 10A/25A selectable
- Test Duration: Programmable 1-99 seconds
- Measurement Accuracy: ±5% of reading
Application Domains:
- Appliance Manufacturing: Grounding terminal resistance verification for household appliances including rice cookers, washing machines, and air conditioning units (10A range, 0-600mΩ). Compliant with IEC 60335-1 (GB 4706.1) requirements for grounding system reliability assessment and electrical shock prevention.
- Lighting Equipment: Grounding terminal testing for LED outdoor luminaires, stage lighting systems, and emergency lighting fixtures (25A range, 0-200mΩ). Validates compliance with IEC 60598-1 (GB 7000.1) standards for grounding safety in humid and outdoor environments.
- Information Technology Equipment: Grounding system evaluation for servers, routers, printers, and related IT infrastructure (10A range). Supports verification according to IEC 60950-1 (GB 4943.1) requirements for equipment grounding integrity.