Product overview
High voltage test of electrical equipment is one of the most important items stipulated in Insulation Preventive Test. Voltage test can be divided into AC voltage test and DC voltage test. Ac voltage test can be divided into power frequency test, frequency conversion test and 0.1Hz ultra-low frequency test technology, among which 0.1Hz ultra-low frequency test technology is the latest technology and recommended by the International Electrotechnical Commission. According to the actual situation of the electric power system in our country, the National Development and Reform Commission has formulated the industry standard of "Test Method for Ultra-low frequency (0.1Hz) Voltage Resistance of crosslinked polyethylene insulated Power cable in 35kV and Below". In 2004, the power industry standard of "General Technical Condition DL/T 849.4-2004 of Ultra-low frequency High Voltage Generator" was promulgated. This latest test method is being promoted in my country.
In the large and medium-sized generators, motors, power cables and other test products for power frequency voltage test, because their insulation layer shows a larger capacity, so the need for a large capacity of the test transformer or resonant transformer. Such huge equipment, not only bulky, high cost, and very inconvenient to use. In order to solve this contradiction, it is widely used in the world to reduce the test frequency, so as to reduce the capacity of the test power supply. Ultra-low frequency insulation voltage test is actually an alternative method of power frequency voltage test. From years of theory and practice at home and abroad, it has been proved that 0.1Hz ultra-low frequency voltage test instead of power frequency voltage test, not only can have the same equivalence, but also the volume of the equipment is greatly reduced, the weight is greatly reduced, the theoretical capacity is about 500% of power frequency, and the operation is simple, which is the main reason why developed countries generally adopt this method.
Our company's new generation of ultra-low frequency high voltage generator is the core product of independent research and development using the latest technology, using 7 inch touch screen, imported high-speed AD acquisition circuit, and advanced production technology. Improve the quality and stability of the instrument, reduce the volume and weight of the equipment, simple operation, overcome many shortcomings of similar domestic products, cost performance is much higher than similar imported products of mechanical booster short service life, high failure rate, large volume shortcomings. Compared with other voltage test equipment, 0.1Hz ultra-low frequency has many advantages.
Through years of practice, a large number of users' feedback shows that: this series of ultra low frequency and high voltage technology market leader, the highest cost performance!
Product features
1,High degree of intelligence: digital frequency conversion technology, microcomputer control, booster, step-down, measurement and other test process fully automatic.
2,Easy operation: simple wiring, 7 inch LCD touch screen, easy operation, friendly man-machine interaction.
3,Comprehensive protection: multiple protection (overvoltage protection, high and low voltage side overcurrent protection), quick action (action time ≤10ms), safe and reliable instrument.
4,Safe and reliable: controller and high voltage generator low voltage connection, photoelectric control, safe and reliable use.
5,The high and low voltage closed-loop negative feedback control circuit is adopted, and the output has no capacity rise effect.
6,Accurate sampling: High voltage current and voltage data are obtained directly through high voltage side sampling, so the data is true and accurate.
7,Complete configuration: 7 "capacitive touch screen, LCD Chinese character display, automatic storage, automatic printing.
8,Wide test range: 0.1Hz, 0.05Hz, 0.02Hz and 0.01Hz multi-frequency selection, wide test range.
9,Easy to carry: The instrument is small in size and light in weight, which is very conducive to outdoor operation.
10,Multi-language display: Chinese and English switching function, other languages can be customized.
Product parameters
Technical Parameters
| Power supply |
AC220V±5%, 50/60Hz. If using a generator, it must be a digital inverter generator with 220V output and power >8kW. Ordinary generators or UPS power supplies are prohibited. |
| Output Voltage |
30kV, 40kV, 50kV, 60kV, 70kV, 80kV, 80kV, 90kV |
| Output frequency |
0.1Hz, 0.05Hz, 0.02Hz,0.01Hz |
| Load Capacity |
0.1Hz-0.5μF, 0.05Hz-1.0μF,0.02Hz-2.5μF,0.01Hz-5μF |
| Measurement accuracy |
3% |
| Voltage positive,negative peak error |
≤3% |
| Voltage waveform distortion |
≤5% |
| Operating Environment |
Temperature: -10ºC~+40ºC |
| Humidity |
≤85%RH |
Ultra-low frequency series products
| Model number |
Rated voltage |
Carrying capacity |
Power supply fuse |
Generator power |
Product structure, weight |
| 30/1.1 |
30kV(peak) |
0.1Hz, ≤1.1μF |
10A |
>3kW |
Controller: 4kg, booster: 25kg |
| 0.05Hz,≤2.2μF |
| 0.02Hz,≤5.5μF |
| 0.01Hz,≤11μF |
| VLF-40kV |
40kV(peak) |
0.1Hz,≤0.8μF |
15A |
>4kW |
Controller: 4kg, booster: 25kg |
| 0.05Hz,≤1.6μF |
| 0.02Hz,≤4μF |
| 0.01Hz,≤8μF |
| VLF-50kV |
50kV(peak) |
0.1Hz,≤0.7μF |
20A |
>5kW |
Controller: 4kg, booster: 35kg |
| 0.05Hz,≤1.4μF |
| 0.02Hz,≤3.5μF |
| 0.01Hz,≤7μF |
| VLF-60kV |
60kV(peak) |
0.1Hz,≤0.6μF |
20A |
>6kW |
Controller: 4kg, booster: 45kg |
| 0.05Hz,≤1.2μF |
| 0.02Hz,≤3μF |
| 0.01Hz,≤6μF |
| VLF-80kV |
80kV(peak) |
0.1Hz,≤0.5μF |
30A |
>8kW |
Controller: 4kg, booster: 50kg |
| 0.05Hz,≤1.0μF |
| 0.02Hz,≤2.5μF |
| 0.01Hz,≤5μF |
| VLF-90kV |
90kV(peak) |
0.1Hz,≤0.4μF |
30A |
>9kW |
Controller: 4kg, booster: 55kg |
| 0.05Hz,≤.0.8μF |
| 0.02Hz,≤2.0μF |
| 0.01Hz,≤4μF |
Comparison of mechanical and electronic performance of 0.1Hz voltage test equipment
| 0.1Hz Voltage resistant device type |
High pressure control system |
High voltage waveform |
Energy saving |
noise |
Mechanical life |
Electrical life |
| Mechanical type |
High voltage mechanical switch toggles polarity |
Square wave |
No energy saving: the excess energy is consumed with high-power resistance |
high |
short |
short |
| Electronic type |
High voltage electronic switches switch polarity |
Sinusoidal wave |
Energy conservation: Excess power is fed back into the grid |
slight |
There is no |
long |
Performance comparison of various pressure test equipment
| Comparative content |
Power frequency withstand voltage |
Variable frequency voltage resistance |
Withstand voltage 0.1Hz |
Dc voltage resistance |
| equivalence |
good |
good |
good |
In general |
| Insulation destructiveness |
small |
small |
small |
larger |
| Operational safety |
lower |
lower |
high |
lower |
| Test connection |
complex |
complex |
simple |
simple |
| Equipment volume |
maximum |
larger |
small |
small |
Audited Supplier 
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