What does a withstand voltage tester primarily test?
Release Time:
2025-06-11
The withstand voltage tester is primarily used to assess the insulation performance of electrical equipment. By applying a test voltage higher than the normal operating voltage, it helps determine the equipment's ability to withstand high voltages and identify any leakage current issues in the insulation materials.
The withstand voltage tester is primarily used to assess the insulation performance of electrical equipment. By applying a test voltage higher than the normal operating voltage, it evaluates the insulation materials' ability to withstand high voltages and measures any leakage current that may occur.
The core testing content of the withstand voltage tester
Insulation Strength Test:
Assess the voltage-withstanding capability of equipment insulation materials under high-voltage conditions to prevent breakdown or leakage accidents caused by overvoltage.
The test voltage range covers power-frequency AC, DC, and pulse voltages, making it suitable for various equipment types, such as power cables, transformers, motors, and more.
Leakage Current Monitoring:
Simultaneously measure the leakage current value while applying high voltage to determine whether the insulation performance meets the standard (e.g., the leakage current of medical devices must comply with the GB 9706.1-2020 standard).
Expand testing functionality:
Some models integrate an insulation resistance test function, allowing measurement of insulation resistance values—but their accuracy is typically lower than that of dedicated megohmmeters.
Working Principles and Test Types
**Working Principle:** A programmable power module generates a high-voltage signal, which, combined with a signal acquisition system, continuously monitors voltage and current parameters to determine whether the insulation performance meets the required standards.
Test Type:
**AC Withstand Voltage Test:** Simulates the insulation performance of equipment under alternating current conditions.
DC Withstand Voltage Test: Suitable for detecting DC leakage current and high-voltage equipment such as zinc oxide surge arresters.
Pulse Withstand Voltage Test: Simulates transient high-voltage conditions such as lightning strikes or switching overvoltages.
Application Areas and Significance
Industry Coverage:
High-security sectors such as power systems (transformers, cables), electronics manufacturing (home appliances, new-energy vehicles), and medical devices.
Safety Significance:
Prevent accidents such as electric shock and fire caused by insulation failure, ensuring that equipment meets national safety standards (e.g., DL/T848.1-2004, GB9706.1-2020).
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