Brief introduction
It is designed and manufactured for electrical voltage 10kV, 35kV, 300MW thermal power machine, 10kV, 35kV power transformers and lines etc. all electrical main equipment withstand voltage test. Ultra-low frequency withstand voltage test is essentially an alternative of power frequency withstand voltage test. We know that when power frequency withstand voltage test of large generators, cables etc., because of their insulating layer with large capacity, need large-capacity test transformer or resonant transformer. These devices, high cost, and very inconvenient. To solve this problem, power sector uses the 0.1Hz ultra-low frequency HV generator test device; reduce the test frequency to reduce the capacity of the test power, thus greatly simplifying field testing difficulty. From home and abroad for many years theories and practices have proved that with 0.1Hz ultra-low frequency withstand voltage test replace power frequency withstand voltage test, not only have the same equivalence, and the volume of the device is greatly reduced, greatly reduced weight, theoretical capacity is about one five-hundredth of power frequency.
Products features
1. Data of current, voltage, wave form can be directly sampled at high voltage side, so the data is real and accurate.
2. Overvoltage protection: If the output exceeds the set limit of voltage, the instrument will shut-down to protect itself; the actuation time is less than 15ms.
3. Overcorrect protection: it is high-low voltage dual protection in the design, the accurate shut-down protection can be made according to the set value at high voltage side; If the current on low voltage side exceeds the rated current, the instrument will take shut-down protection, the actuation time are both less than 15ms.
4. A high voltage output protective resistor is provided in the voltage boost body in the design and this eliminates the need of additional protective resistor connected outside.
5. As a result of high and low voltage closed-loop negative feedbacks control circuit, the output without capacitive rise effect.
6. High-voltage control part adopts innovative light control HV switching unit, control is accurate, safe and reliable;
7. With color man-machine interface touch control plus controls modular software operating system, precise and intuitive
8. Multi-purpose, can simultaneously measure tested objects capacitance, insulation resistance, leakage current, and AC withstand voltage test
Product parameters
Table 1:
| Model |
Rated Voltage |
Load Capacity |
Fuse |
Reference Weight |
| VLF-30 (30KV) |
30kV/20mA
(Peak) |
0.1Hz,≤1.1µF |
5A |
Controller: 4kg
Booster:25kg |
| 0.05Hz,≤2.2µF |
| 0.02Hz,≤5.5µF |
| VLF-50 (50KV) |
50kV/30mA
(Peak) |
0.1Hz,≤1.1µF |
15A |
Controller:4kg
Booster: 50kg |
| 0.05Hz,≤2.2µF |
| 0.02Hz,≤5.5µF |
| VLF-80 (80KV) |
80kV/30mA
(Peak) |
0.1Hz,≤0.5µF |
20A |
Controller:4kg
Booster 1(30kV):25kg
Booster 2(50kV):50kg |
| 0.05Hz,≤1µF |
| 0.02Hz,≤2.5µF |
Table 2:
| Output rated voltage |
See table 1 |
| Output frequency |
0.1Hz,0.05Hz,0.02Hz |
| Load capacity |
See table 1 |
0.1Hz max 1.1 μf |
| 0.05 Hz max 2.2 μf |
| 0.02 Hz max 5.5 μf |
| Measurement accuracy |
2.5 % |
| Positive and negative voltage peak errors |
≤2.5% |
| Voltage wave form distortion |
≤3% |
| Insulation resistance measurement error |
≤2.5% |
| Leakage current measurement error |
≤2.5% |
| Power |
AC 50 Hz,220V ±5% |
| Power Fuse |
See table 1 |
FAQ
1. Is your company a sales company or a manufacturer?
Wuhan UHV Power Technology Co.,Ltd. is an industrial and trade enterprise, with its own factory, self-produced and self-sold. We were founded in 2004 and have fifteen years of production experience. Our company has reliable production lines, test rooms and R&D centers.
2. Whether the goods are in stock, whether they can be customized, and how long the delivery time is.
After the goods have been ordered, it takes about 7 working days for production if there are no accidents.
3. Is the quality guaranteed?
In order to ensure quality, we use imported components in large quantities. After three times of quality inspection, the goods can be sent out, and the export is uniformly packed in non-fumigation wooden boxes.
4. What are the after-sales terms?
We offer free consulting service, one year warranty, and adopt various methods such as email communication, video calls, technology door-to-door, aiming to solve any after-sales problems in a timely manner.
5. What are the cooperative countries or regions?
Products have been successfully exported to the United States, Brazil, Australia, Russia, the Netherlands, Indonesia, Bangladesh, Iran, India, Saudi Arabia, Mongolia, Japan and other countries and regions. In the United States, India, Vietnam and other regions have cooperative distributors, can provide thoughtful services.
Contact us
Wuhan UHV Power Technology Co.,Ltd.
Address:Building 6, Optics Valley Optical-Mechanical Industrial Park, No.83, Gaoxin 5th Road,
East Lake High-tech Zone, Wuhan city .China 430223
Audited Supplier 
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