Product Features
1. Advanced Technology: Uses digital frequency conversion technology, microcomputer control, fully automated test processes such as voltage boosting, voltage reduction, measurement, and protection.
2. Easy Operation: Simple wiring, foolproof operation.
3. Comprehensive Protection: Multiple protections (overvoltage protection, overcurrent protection on high and low voltage sides), fast action (action time ≤20ms), safe and reliable instrument.
4. Safe and Reliable: Low-voltage connection between controller and high-voltage generator, photoelectric control, safe and reliable use.
5. Uses high and low voltage closed-loop negative feedback control circuit, output without capacitive rise effect.
6. Complete Configuration: LCD Chinese display, automatic storage, automatic printing.
7. Wide Test Range: 0.1Hz, 0.05Hz, and 0.02Hz multiple frequency selection, wide test range.
8. Small Size, Light Weight: Very convenient for outdoor operation.
Product Parameters
Model | Peak Voltage | Measurement Range | Weight | Application |
ZSVLF-30/1.1 | 30kV | At 0.1Hz ≤1.1μF | Controller: 4kg | For cables, generators, etc. with voltage 10kV and below |
At 0.05Hz ≤2.2μF | ||||
At 0.02Hz ≤5.5μF |
1. Power Supply: 220V±10%, 50±5%Hz
Note: If using a portable generator for power supply, the generator output voltage and frequency must be stable (generally requires power >3kW, frequency 50Hz, voltage 220V±5%), otherwise auxiliary measures should be taken to stabilize the generator output.
2. Output Voltage Accuracy:
Output voltage peak instability: ≤1%
Output voltage frequency instability: ≤3%
Output voltage waveform distortion: ＜5%
3. Operating Environment: Temperature: -10°C to +40°C; Humidity: ≤85%RH
Single-phase-to-ground capacitance of different generators
Thermal Power | Hydropower | ||||||
Generator Capacity (MW) | 200 | 300 | 600 | 800 | 125-150 | 300 | 400 |
Single-phase-to-ground Capacitance (μF) | 0.2-0.25 | 0.18-0.26 | 0.31-0.34 | 0.69 | 1.8-1.9 | 1.7-2.5 | 2.0-2.5 |
Capacitance of Cross-linked Polyethylene Insulated Single-core Power Cable (μF/km)
Cross-section mm2 Capacitance μF/km Voltage kV | 16 | 25 | 35 | 50 | 70 | 95 | 120 | 150 | 185 | 240 | 270 |
10 | 0.15 | 0.17 | 0.18 | 0.19 | 0.21 | 0.24 | 0.26 | 0.28 | 0.32 | 0.38 | - |
35 | - | - | - | 0.11 | 0.12 | 0.13 | 0.14 | 0.15 | 0.16 | 0.17 | 0.19 |
Product Introduction
0.1Hz ultra-low frequency technology is an advanced technology recommended by the International Electrotechnical Commission. The new generation ZSVLF series 0.1Hz ultra-low frequency high-voltage generator is a core product independently developed by Zhongshi Gaocheng. It overcomes many shortcomings of the first-generation mechanical products, and its cost performance is far higher than similar imported products. It is especially suitable for withstand voltage tests of electrical equipment with large insulation equivalent capacitance (e.g., power cables, power capacitors, large and medium-sized generators and motors).
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
