Product Features
1. Current, voltage, and waveform data are all directly sampled from the high-voltage side, ensuring data authenticity and accuracy.
2. Overvoltage protection: When the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time of less than 20 milliseconds.
3. Overcurrent protection: Designed with dual protection at both high and low voltage sides. The high-voltage side can perform shutdown protection based on the set value.
4. When the current on the low-voltage side exceeds the rated current, shutdown protection will be triggered, with an action time of less than 20 milliseconds.
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 a high-low voltage closed-loop negative feedback control circuit, the output has no capacitive rise effect.
Product Parameters
Output frequency: 0.1Hz, 0.05Hz, 0.02Hz
Load capacity:
0.1 Hz max 1.1F
0.05 Hz max 2.2F
0.02 Hz max 5.5F
Measurement accuracy: 3%
Voltage positive and negative peak error: ≤3%
Voltage waveform distortion: ≤5%
Operating conditions:
Indoor and outdoor;
Temperature: -10℃∽+40℃
Humidity: ≤85% RH
Power supply: AC 50Hz, 220V ±5%
Model | Peak Voltage | Measurement Range | Weight | Application |
ZSVLF-40/1.1 | 40kV | At 0.1Hz ≤1.1μF | Controller: 4kg | For cables and generators with voltage 15.75kV and below |
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 cables (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
The ZSVLF series ultra-low frequency high voltage generator is a new type of ultra-low frequency AC test device that uses a cosine square wave as the output source. It is mainly used for non-destructive insulation withstand voltage testing of PE (polyethylene)/XLPE (cross-linked polyethylene) plastic power cables in the power sector. It features international advanced level at the end of the 20th century and domestic leading level.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
