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High Voltage Tester

Variable Frequency Series Resonance Test System

  • This device is mainly used for AC withstand voltage tests of cross-linked cables, hydroelectric generators, main transformers, busbars, GIS, etc.
    This device is mainly composed of a frequency conversion control power supply, an excitation transformer, an inductor, a capacitor divider, and a compensation capacitor (optional).
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Details

Product Parameter

variable-frequency power source

rated capacity

3-450kW

power

                                                                                             220±10%V/110±10%Vsingle phase50hz/60hz

                                                                                                             380±10%Vthree phase50hz

output voltage

0~200V(220V)0~400V(380V)

rated input current

15A~800A(220V)7.5A~400A(380V)(customizable)

rated output current

15A~800A(220V)7.5A~400A(380V)(customizable)

voltage resolution

0.01kV

voltage measurement accuracy

1.5%

frequency regulation range

30~300Hz

frequency resolution

≤0.1Hz

frequency stability

0.10%

performance period

permissible continuous operation under rated load

60min(customizable180min~1440min)overvoltage 1.1 times 1 minute

noise level

≤50dB

exciting transformer

rated capacity

3-450kVA

input voltage

0~400V(customizable 0~200V)single phase

output voltage

1.5/3/6/0.4kV4/8/16/0.4kV(customizable)

High-voltage reactor

rated capacity

25kVA~6000kVA(customizable)

nominal voltage

25kV~60kV ,single

 dry-type

54kV~300kV, single

oil-immersed(customizable)

rated current

1A~3A,single dry-type2A~15A ,single oil-immersed(customizable)

inductance value

55H~120H(customizable)

quality factor

Q≥30(f=45Hz)

capacitive divider

nominal voltage

30kV~800kV(customizable)

High-voltage capacitance

500pF~3000pF(customizable)

dielectric loss

tgσ≤0.5%

divider ratio

1000:1~9000:1(customizable)

measurement accuracy

effective value 1.5 level


Product Feature And Application

1.The device has protection functions such as overvoltage, overcurrent, zero position startup, and system disharmony (flashover). The overvoltage and overcurrent protection values can be set according to user requirements. When the test sample flashes over, the flashover protection will activate to protect the sample.

2. The entire device is very lightweight, making it easy to use on-site.

3. The device has three working modes, which enable users to flexibly select according to the on-site conditions, thereby increasing the testing speed. The working modes are: fully automatic mode, manual mode, and automatic tuning and manual voltage rise mode.

4. It can store and print data remotely. The data entries are numbered with digits, which is convenient for users to identify and locate.

5. When the device performs automatic frequency scanning, the starting frequency can be set arbitrarily within the specified range. At the same time, a large LCD screen displays the scanning curve, making it convenient for users to intuitively understand whether the resonance point has been found.

6. By adopting the DSP platform technology, it is convenient to add or remove functions as well as upgrade according to user needs, and this also makes the human-computer interaction interface more user-friendly.

7. The operation interface supports language switching function, allowing for free switching among multiple languages. The default setting is to switch between Chinese and English. Other languages can be customized.

8. The system is equipped with a built-in parallel resonance parameter calculator. With just one click, it can quickly calculate the inductance, capacitance, frequency, resonant high voltage current, and cable capacitance of the parallel resonance.


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