Principle of the ultra-low frequency insulation voltage test
The ultra-low frequency insulation withstand voltage test is in
fact an alternative to the industrial frequency withstand voltage
test. As we know, in the test of large generators, cables and other
test products for industrial frequency withstand voltage test,
because their insulation layer presents a large electrical
capacity, so need a large capacity test transformer or resonant
transformer. Such some huge equipment, not only bulky, costly, and
very inconvenient to use. In order to solve this contradiction, the
power sector has adopted a reduced test frequency, thus reducing
the capacity of the test power supply. From the theoretical and
practical proof of many years at home and abroad, with 0.1Hz
ultra-low frequency withstand voltage test instead of frequency
withstand voltage test, not only can have the same equivalence, and
the volume of the equipment is greatly reduced, the weight is
greatly reduced, theoretically the capacity of about one fifth of
the frequency, and simple operation, compared with the frequency
test superiority more. This is the reason why this method is
commonly used in developed countries.
This product combines the advanced technology of modern digital
frequency conversion and adopts microcomputer control, which makes
boosting, bucking, measuring and protection completely automatic.
Because it is fully electronic, it is small in size and light in
weight. The large LCD display is clear and intuitive, and it can
display the output waveform and print test reports.This product has the following characteristics
1, rated voltage less than or equal to 50kV ultra-low frequency
using a single structure (a booster); more than 50kV ultra-low
frequency using a series structure (two boosters in series), so
that the overall weight is greatly reduced, the carrying capacity
is enhanced, and the two boosters can be used separately for low
voltage level ultra-low frequency.
2,Current, voltage and waveform data are obtained directly from the
high-voltage side sampling, so the data is accurate.
3,With over-voltage protection function, when the output exceeds
the set voltage limit value, the instrument will stop and protect,
the action time is less than 20ms.
4,With over-current protection function: designed for double
protection of high and low voltage, the high voltage side can be
stopped precisely according to the set value; the low voltage side
will be stopped when the current exceeds the rated current, the
action time is less than 20ms.
5,The high voltage output protection resistor is designed in the
booster body, so there is no need to connect another protection
resistor outside.
6,Because of the use of high and low voltage closed loop negative
feedback control circuit, the output has no capacitive rise effect.Model no | Rated Voltage | Load Carrying Capacity | Power FuseTube | Product Structure |
XHDP-30 | 30kV (Peak) | 0.1Hz,≤1.1µF | 8A | Controller Booster |
0.05Hz,≤2.2µF |
0.02Hz,≤5.5µF |
XHDP-50 | 50kV (Peak) | 0.1Hz,≤1.1µF | 20A | Controller Booster |
0.05Hz,≤2.2µF |
0.02Hz,≤5.5µF |
XHDP-60
| 60kV (Peak) | 0.1Hz,≤1.1µF | 20A | Controller Booster |
0.05Hz,≤2.2µF |
0.02Hz,≤5.5µF |
XHDP-80
| 80kV (Peak) | 0.1Hz,≤1.1µF | 20A | Controller Booster |
0.05Hz,≤2.2µF |
0.02Hz,≤5.5µF
|
Welcome you contact us for 30kV, 50kV, 60kV, 80kV, 90kV
customization.
1. Are you a trading company or a manufacturer?
We are a professional manufacturer with more than 10 years of
experience. We can strictly control the quality of parts and
finished products.
2. What is the delivery time and inventory?
If our best-selling products are in stock, it will be 5-8 working
days for shipment. But for mass production and customized
production, the time will take 2-4 weeks.
3. What are your payment terms?
Payment ≤ USD 2000, 100% T/T prepayment. Orders over USD 2000 can
be negotiated.
4. How long is your product warranty?
We provide 1 year warranty for the equipment.
5. How do you ensure quality?
The product links include R&D, manufacturing, commissioning and
technical support, following strict and scientific management
principles. Therefore, we can support strong production and R&D
capabilities, and can produce high-quality products at competitive
prices to meet customers' high requirements.
6. What support can I get?
We will provide training support, marketing support, technical
support and supply chain support. You can contact us for more
information.
7. Where is your factory? Can I visit your factory?
We are located in Xi'an, Shaanxi, China. We are close to Xi'an
Xianyang International Airport, which is about 2 and half hours by
plane from Shanghai and Guangzhou. All customers from all over the
world are welcome to visit us.
8. How to become your dealer?
Every company interested in power system instruments can contact us
without hesitation, including website letters, emails, telephones,
etc. We will contact you quickly according to your company
information and cooperation intentions.