What is the main working principle of frequency conversion series resonance?

MEXB series variable frequency series resonance consists of variable frequency power supply, excitation transformer, reactor and capacitor voltage divider. The capacitance of the measured object and the reactor form a series resonant connection mode; The voltage divider is connected in parallel to the measured object for measuring the resonance voltage on the measured object and sending out an overvoltage protection signal; The FM power output is coupled to the series resonance circuit through the excitation transformer to provide excitation power for the series resonance. MEXB series frequency conversion series resonance is based on the principle of series resonance. The series resonant circuit is excited by the excitation transformer, and the output frequency of the variable frequency controller is adjusted to make the loop inductance L resonate in series with the sample C, and the resonant voltage is the voltage applied to the sample. Frequency conversion resonance test device is widely used in electric power, metallurgy, petroleum, chemical industry and other industries, and is suitable for the handover and preventive test of capacitive samples with large capacity and high voltage.

Mainly used in the following aspects:

Ac withstand voltage test of 1 and 6kV-500kV high voltage cross-linked cables.

2. AC withstand voltage test of generator

3. AC withstand voltage test of 3.GIS and SF6 switch

4, 6kV-500kV transformer power frequency withstand voltage test

5. AC withstand voltage test of busbar, bushing, transformer and other power high-voltage equipment.

Advantages of MEXB series frequency conversion series resonance

1. Easy to operate, small in size and light in weight, very convenient for field use and transportation (the volume and weight are about110 ~1/30 of the traditional test voltage transformer;

2. Low requirements for on-site power supply;

3. Good test equivalence;

4. Unique patented low-harmonic technology, the measured harmonic content of Wugao Institute is less than 0.3%, far below the national standard of not exceeding 5%, which greatly protects the main transformers, generators and other equipment from high-voltage harmonic damage;

5. Ensure the safety of personnel and equipment through strict type test and appraisal by the authoritative organization-Wuhan High Voltage Research Institute; In 2008, he was among the best in the national equipment competition organized by Northeast Electric Power Research Institute.

6. It meets the requirements of the national standard and has the function of peak monitoring, which can monitor the waveform of high voltage test in real time;

7. One-button mouse knob operation, large LCD screen, easy to use;

8. Bring your own micro printer to print and save test data at any time;