AC/DC Automatic Withstand Voltage Tester | Test Precautions?

AC/DC Automatic Withstand Voltage Tester/AC/DC High Voltage Tester - Test Precautions and Features? The test precautions and features for AC/DC high voltage testers are as follows:

I. Test Precautions

1. Safety First, Strict Standards: Establish a clear warning zone and ensure the test sample is completely isolated and grounded. Operation requires two people, one for supervision. The instrument's grounding terminal must be reliably connected to the ground grid via a dedicated grounding wire (≥4mm²).

2. Differentiate Between AC and DC Modes:

◦ DC Testing: A slow voltage increase (approximately 1-2kV/s) must be used, and the microammeter must be closely monitored. After the test, the test sample (especially large capacitor equipment) must be fully discharged through a resistor before directly short-circuiting to ground to prevent residual charge damage.

◦ AC Testing: Pay attention to the capacitance rise effect; the output voltage must be corrected according to the test sample capacitance and equipment impedance. Monitor the high-voltage side voltage to prevent excessively high voltage at the test sample terminal.

3. Correct Wiring and Operation: Ensure the correct polarity of the rectifier silicon stack during DC testing. If breakdown, abnormal noise, or violent pointer swings occur during the voltage boosting process, immediately and quickly reduce the voltage and disconnect the power.

4. Environment and Equipment Status: Keep the equipment and leads dry and clean. Avoid testing in humid or dirty environments to prevent surface flashover.

II. Main Technical Features

1. Multi-functional with Stable Output: The integrated design can output both AC and DC high voltage. The DC voltage ripple factor is low (typically ≤3%), and the AC voltage harmonic distortion is low, ensuring test accuracy.

2. Comprehensive Protection Functions: Built-in overvoltage, overcurrent, and flashover protection circuits provide rapid and reliable operation. It also features automatic overload protection for the microammeter in DC mode.

3. Digital Intelligent Management: The new instrument is equipped with digital display, automatic voltage boosting, and storage functions. It can record leakage current curves and manage and analyze data through software, improving efficiency.

Summary: This instrument is a fundamental piece of equipment for high-voltage insulation testing. Its core value lies in accommodating both AC and DC testing needs, providing safe and reliable insulation strength testing for various electrical equipment through comprehensive protection design and stable output. During operation, it is imperative to strictly distinguish the different requirements of AC/DC modes, prioritizing safety. The YDJZ AC/DC high-voltage tester is primarily used for insulation strength testing of various electrical products, electrical components, and insulating materials under specified voltages to assess the insulation level of products, detect insulation defects, and measure overvoltage capability.

▶ It is the preferred product for power operation departments, electrical appliance manufacturers, metallurgical, coal mining, electrified railway departments, research institutions, and universities requiring withstand voltage testing equipment.

▶ It is an essential testing equipment for power equipment inspection and preventative testing.

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