The 80KV Very Low Frequency Withstand Voltage Test Device adopts microcomputer control, with fully automated boosting, step-down, measurement, and protection,and allows manual intervention during the automatic boosting process. Due to full electronic design, it is small in size and light in weight, with a large-screen LCD display that is clear and intuitive, and a printer to output test reports. The design specifications fully comply with the power industry standard "General Technical Conditions for Special Testing Instruments for Power Equipment, Part 4: General Technical Conditions for Very Low Frequency High Voltage Generators", making it very convenient to use. Currently, domestic and international methods use mechanical modulation and demodulation to generate very low frequency signals, which results in non-standard sine waveforms, large measurement errors, spark discharge in the high-voltage section, bulky equipment, and the need for high-power high-voltage resistors in the second and fourth quadrants of the sine wave for discharge shaping, leading to high overall power consumption. This product overcomes these shortcomings. Additionally, the following features are worth special mention:
Current and voltage data are directly sampled from the high-voltage side, ensuring data accuracy and reliability.
Overvoltage protection: When the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time of less than 20ms.
Overcurrent protection: Designed with dual protection at both high and low voltage sides. The high-voltage side can perform precise shutdown according to the set value
protection; when the current on the low-voltage side exceeds the rated current, shutdown protection will be triggered, with action times less than 20ms.
★ The high-voltage output protection resistor is designed inside the boosting unit, so no external protection resistor is needed.
Due to the adoption of high and low voltage closed-loop negative feedback control circuits, the output has no capacitive rise effect.
1. Rated output voltage: See Table 1
2. Output frequency: 0.1Hz, 0.05Hz, 0.01Hz.
3. Load capacity: See Table 1 0.1 Hz max 1.1μF
0.05 Hz max 2.2μF
0.02 Hz max 5.5μF
4. Measurement accuracy: 3%
5. Voltage positive and negative peak error: ≤3%
6. Voltage waveform distortion: ≤5%
7. Operating conditions: Indoor and outdoor; temperature: -10℃∽+40℃; humidity: ≤85% RH
8. Power supply: AC 50 Hz, 220V ±5%
9. Power fuse
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
