


Very Low Frequency tester VLFGS
This product adopts digital frequency conversion technology, microcontroller control, and is fully automated for boosting, reducing voltage, measuring, and protecting. Due to its fully electronic design, it is small in size and light in weight. It adopts a large screen color touch screen, which is clear and intuitive, easy to operate, and displays output waveforms.
1.1 Product Features Introduction
The design index meets the national standard of General Technology Conditions for Ultra Low Frequency and High Voltage Generators. The main features are as follows:
1.1.1 For ultra-low frequencies with a rated voltage less than or equal to 60kV, a single connection structure (one booster) is used; Ultra low frequencies greater than 60kV adopt a series structure (two boosters are connected in series), greatly reducing the overall weight and enhancing the load-bearing capacity. Moreover, both boosters can be used separately, achieving one machine with multiple functions.
1.1.2 Current and voltage data are directly sampled from the high-voltage side, so the data is accurate.
1.1.3 Intelligent comprehensive protection function: Without setting current and voltage protection values, the instrument can calculate overvoltage and overcurrent protection values based on the size of the sample capacitance and the test voltage value. It can also provide protection against voltage and current mutations, so it can capture discharge situations. The protection action time is less than 20ms.
1.1.4 Using 150kV high-voltage line output, safe and reliable.
1.1.5 Due to the use of a closed-loop negative feedback control circuit, the output has no capacitance rise effect.
1.1.6 The new product has added DC, dielectric loss, and partial discharge testing functions, which can synchronously measure the dielectric loss, capacitance, insulation resistance, and partial discharge of the test object during the withstand voltage test process.
1.2 Product specifications of ultra-low frequency and high voltage power supply series: Table 1
Rated voltage | Load | Shape | Product structure, weight, and application range |
30kV (Peak) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 10 µ F |
| Controller: 4 kg Booster: 25 kg Used for voltage withstand test of cables and motors up to 10KV |
40kV (Peak) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 10 µ F |
| Controller: 4 kg Booster: 25 kg Used for voltage withstand test of cables and motors up to 10KV |
50kV (Peak) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 10 µ F |
| Controller: 4 kg Booster: 45 kg Used for voltage withstand test of cables and motors up to 15KV |
60kV (Peak) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 5 µ F |
| Controller: 4 kg Booster: 45 kg Used for voltage withstand test of cables and motors up to 25KV |
80kV (Peak) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 10 µ F(≤50KV),≦4µF(>50kV) |
| Controller: 4 kg Booster1: 40KV Boooster2:40KV Used for voltage withstand test of cables and motors up to 35KV |
30KV 40KV 50KV 60KV 70KV 80KV (Integrated 40KV unit+40KV booster) | Automatic frequency 0.1Hz-0.01Hz Capacity: ≤ 10 µ F (≦8µF @80KV) | Weight: 30kg(Integrated 40KV unit) +43kg(40KV booster) Appearance: 505 x 503 x 405(mm)Integrated 40KV unit 505 x 303 x 605 (mm)40KV booster The purpose of each specification product is the same as above |
1.3 Technical indicators of ultra-low frequency and high voltage power supply
1.3.1 Rated output voltage: 30kV-80kV. Different specifications are shown in Table 1
1.3.2 Output frequency: Automatic frequency conversion range: 0.1Hz-0.01Hz
1.3.3 Carrying capacity: see Table 1
1.2.4 AC voltage resolution: 0.1kV
1.3.5 Voltage accuracy: 1%
1.3.6 AC current resolution: 0.1mA
1.3.7 AC current accuracy: 1%
1.3.8 Voltage positive and negative peak error: 1%
1.3.9 Voltage waveform distortion: 1%
1.3.10 Service conditions: indoor and outdoor; Ambient temperature (operational) -10°C to +50°C Storage temperature -20°C to +60°C
1.3.11 Input power supply: frequency 50Hz, voltage 220V ± 5% (or frequency 60Hz, voltage 110V ± 5%). If using a micro generator for power supply, a variable frequency generator should be used instead of a regular generator, as the unstable speed of the regular generator can cause abnormal boost and damage to the instrument.
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