Compared with traditional high-voltage withstand voltage testing methods, the protection function of the variable frequency resonant withstand voltage testing device is more powerful. Protection functions such as overvoltage, overcurrent, system flashover, and zero start. In addition, the overvoltage and overcurrent protection function can be adjusted according to user needs. During flashover protection, in addition to the flashover action, the flashover voltage value can also be recorded for the convenience of users for testing and analysis.
The frequency conversion resonance withstand voltage test device is lightweight and easy to move during on-site testing. The working mode of the variable frequency series resonance test device can be flexibly selected to improve the test speed. Users can adjust according to the on-site testing conditions to improve work efficiency. There are three working modes: automatic, manual, automatic tuning, and manual boosting.
The frequency conversion resonance withstand voltage test device has the function of storing and printing meaningful data. The quantity of stored data is numbered, making it easier for users to identify and search. The data display of the variable frequency series resonance test device is intuitive, making it convenient for users to determine whether the resonance point has been found. Within the specified range, the frequency starting point for automatic frequency scanning can be set arbitrarily, and the scanning direction can be selected up or down.
Variable frequency resonant voltage withstand test device
Of course, there are also some related factors that can affect the testing of the variable frequency resonance withstand voltage testing device. Wuhan Hezong Electric's technical engineers have summarized as follows:
1. Under resonance conditions, XL = Xc, The impedance of the circuit is minimized and reduced to the resistance of the circuit. in other words, Zr = R
2. Under resonance conditions, due to the minimum impedance of the circuit, the current in the circuit is maximum. That is, IR=V/Zr=V/R
3. Therefore, due to the maximum value of resonant current IR, the power consumption of the circuit is also the highest. PR=I 2 RR
4. Under resonance conditions, the circuit draws a large current, which can also be said to draw the maximum current. Therefore, the voltage drop across the inductor (VL=IX L=I x 2 π FRL) and the capacitance CIE (VC=IX C=I x I/2 π FRC) will also be significant.
5. The impact of high-voltage lines
During the AC voltage withstand test of a single electrical equipment frequency conversion resonance voltage withstand test device, the impact of the high-voltage conductor on the test is minimal due to the small capacitance of the tested object. When conducting AC withstand voltage tests on outdoor distribution equipment as a whole, the installation height of the equipment increases with the increase of voltage level. The higher the voltage, the longer the high-voltage line. Generally speaking, long high-voltage leads increase the equivalent resistance of the circuit due to corona losses. When the stray capacitance formed by stray capacitance is connected in parallel with the measured capacitance, the resonant frequency of the circuit will decrease and the Q value will also decrease. At the same time, the interference of surrounding electromagnetic fields increases, causing a decrease in Q value. Therefore, in the AC withstand voltage test of high-voltage electrical equipment, corrugated tube high-voltage leads should be used as much as possible.
Wuhan UHV specializes in producing series resonance (also known as AC withstand voltage tester) and has been engaged in the electrical measurement industry for many years. Its products have first-class quality and welcome customers to come and purchase.