Instrument Features
1. For rated voltage ≤50kV, the VLF adopts a single-stage structure (one booster); for >50kV, it adopts a series structure (two boosters in series), which greatly reduces overall weight, enhances load capacity, and the two boosters can be used separately for lower voltage VLF applications.
2. Current, voltage, and waveform data are directly sampled from the high-voltage side, ensuring data accuracy.
3. Overvoltage protection: when the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time less than 20ms.
4. Overcurrent protection: designed with dual protection for high and low voltage sides. The high-voltage side can be precisely shut down according to the set value; the low-voltage side will shut down when the current exceeds the rated current, with action times less than 20ms.
5. The high-voltage output protection resistor is designed inside the booster, so no external protection resistor is needed.
6. Due to the use of high and low voltage closed-loop negative feedback control circuit, there is no capacitive rise effect in the output.
Technical Parameters
1. Output rated voltage: see Table 1
2. Output frequency: 0.1Hz, 0.05Hz, 0.01Hz
3. Load capacity: 0.1Hz max 1.1µF
0.05Hz max 2.2µF
0.01Hz max 10.0µF
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℃ to +40℃; humidity: ≤85% RH
8. Power fuse: see Table 1
9. Power supply: frequency 50Hz, voltage 220V±5%.
Product Introduction
CTVL Very Low Frequency Withstand Voltage Test Device, this product combines modern digital variable frequency advanced technology, adopts microcomputer control, and fully automates boosting, bucking, measurement, and protection, with manual intervention possible during automatic boosting. Due to full electronic design, it is small in size and light in weight, with a large LCD screen for clear and intuitive display, and a printer for test reports. The design indicators fully comply with the power industry standard "General Technical Conditions for Special Test Instruments for Power Equipment, Part 4: General Technical Conditions for Very Low Frequency High Voltage Generators", making it very convenient to use.
Product Features
★ Current and voltage data are directly sampled from the high-voltage side, ensuring real and accurate data.
★ Overvoltage protection: when the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time less than 20ms.
★ Overcurrent protection: designed with dual protection for high and low voltage sides. The high-voltage side can be precisely shut down according to the set value; the low-voltage side will shut down when the current exceeds the rated current, with action times less than 20ms.
★ The high-voltage output protection resistor is designed inside the booster, so no external protection resistor is needed.
★ Due to the use of high and low voltage closed-loop negative feedback control circuit, there is no capacitive rise effect in the output.
