Frequency Conversion Series-Parallel Resonance Test Device

KEXZB Series Variable Frequency Series-Parallel Resonant Test Equipment

I. Product Introduction of Variable Frequency Series Resonant Test Equipment
       The KEXZB series variable frequency series-parallel resonant test equipment is widely used in industries such as power, metallurgy, petroleum, and chemical engineering. It is suitable for high-capacity, high-voltage capacitive test objects, such as generators, transformers, GIS, high-voltage cross-linked cables, instrument transformers, bushings, etc., for acceptance tests and preventive tests. Our company's independently developed variable frequency and voltage regulation software technology in the field of variable frequency series resonant high-voltage testing surpasses the domestic high-voltage testing industry. Utilizing this technology, the equipment adopts 16-bit fine frequency conversion, 10kHz carrier frequency, SPWM, and imported original IPM integrated module design and manufacturing. The complete set of variable frequency series-parallel resonant test equipment complies with the regulations and requirements of power and research departments for high-voltage testing.
II. Working Principle of Variable Frequency Series Resonant Test Equipment
       The variable frequency series resonant test equipment operates on the principle of series-parallel resonance. By adjusting the output frequency of the frequency conversion controller, the inductance L of the reactor and the capacitance C of the test object resonate, and the resonant voltage is the voltage applied to the test object. The power supply is provided by the frequency conversion controller. After initial step-up by the excitation transformer, the test voltage is applied to the reactor L and the test object CX. By changing the output frequency of the frequency conversion controller, the circuit enters a series resonant state. The resonant frequency of the circuit depends on the capacitance CX of the test object and the inductance L of the reactor. Adjusting the output voltage of the frequency conversion controller allows the high voltage on the test object to reach the required value.
III. Product Features of Variable Frequency Series Resonant Test Equipment
      1. Large screen display of test data and test status, with real-time operation step prompts
      2. Flexible setting of test voltage, frequency range, and pressurization time
      3. Test results can calculate the capacitance of the test object
      4. Equipped with a computer communication interface for easy communication and test data management
      5. Compact size, lightweight, and easy to operate
      6. High resolution, with frequency resolution of 0.001Hz
      7. High safety and reliability; the system has overcurrent, overvoltage, and discharge protection functions, effectively protecting personnel and equipment safety. Test results can be printed, and the software can be upgraded.
IV. Complete Set Composition
       The complete set of equipment consists of a variable frequency voltage regulation power supply, excitation transformer, reactor, voltage divider, and compensation capacitor.

V. Technical Parameters
      1. Ambient temperature: -10～45℃   
      2. Ambient humidity: ≤90％  
      3. Altitude: ≤2000M   
      4. Power input: 220V±10％ single-phase   50Hz  Output 0～220V(≤10KW)   
                            380V±10％ three-phase   50Hz  Output 0～400V
      5. Rated test capacity: 0～8000KVA (capacity output selectable by user) 
      6. Resonant voltage: 0～1000KV (high-voltage output selectable by user)     
      7. Frequency adjustment range: 0.1～300Hz     
      8. System measurement accuracy: 0.5 level          
      9. Frequency adjustment resolution: 0.01Hz          
    10. Instability: ≤0.05％
    11. Output waveform: sine wave
    12. Waveform distortion rate: ≤0.5％
    13. Noise: ≤60dB
    14. Reactor Q value: 30～200 (selectable)

Note: The product is continuously updated and improved during the production process. The product appearance images are for reference only (subject to the actual product). Changes may occur without prior notice.