The general introduction of YNXZ series resonance adopts a multi-level superposition method. Multiple reactors can be used in parallel or series. The voltage divider can be used to measure the test voltage, and can also be used as a compensation capacitor for a small capacitance sample, so that the resonance frequency can be 30 Complete the AC withstand voltage test of a variety of power equipment within the range of ~300Hz. The basic principle of variable frequency series resonance is to use adjustable (30-300Hz) series resonance test equipment to resonate with the capacitor of the tested product to generate an AC test voltage.

The overall introduction of YNXZ series resonance is composed of variable frequency power supply, excitation transformer (also called excitation transformer), reactor and capacitor divider. The capacitor and reactor of the tested product form a series resonant connection; a voltage divider is connected in parallel to the tested product to measure the resonance voltage on the tested product and used as an overvoltage protection signal; the frequency-modulated power output is coupled to the excitation transformer The series resonance circuit provides excitation power for series resonance. The variable frequency series resonance test device uses the principle of series resonance, uses the excitation transformer to excite the series resonance circuit, adjusts the output frequency of the variable frequency controller, makes the loop inductance L and the test product C resonate in series, and the resonance voltage is the voltage applied to the test product. The frequency conversion resonance test device is widely used in electric power, metallurgy, petroleum, chemical and other industries. It is suitable for the transfer and preventive test of large-capacity, high-voltage capacitive test products.

1. The required power capacity is greatly reduced, and the power required for the test is only 1/Q of the test capacity;

2. Small size and light weight, generally 1/3-1/5 of ordinary test equipment;

3. The resonant power supply frequency modulation and power components use excellent components imported from Japan, and the resonant filter circuit is designed to improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent the peak of the harmonic from the test product. Erroneous breakdown

4. The variable frequency power supply has strong protection function and good stability; it has full automatic (automatic tuning, automatic boost), full manual (manual tuning, manual boost) and semi-automatic (automatic tuning, manual boost and manual tuning, automatic boost) Voltage) multiple working modes, which can be switched at will; easy to operate; 220V or 380V single-phase power supply is adopted, which is convenient for on-site power supply;

5. Flexible configuration and strong extension function. The resonant reactor adopts multiple methods and modular combination, which can be connected in series or in parallel to meet the test requirements of a variety of samples and make it more convenient to use on site;

6. The large-screen touch LED LCD color screen and the external mouse directly complete the setting of various parameters, and the test results can be saved, printed, uploaded, and reviewed.

1. Resonant voltage waveform: sine wave, waveform distortion rate <1.0%

2. Output frequency: 30～300Hz

3. Working system: under full power output, continuous working time is 60min

4. Quality factor: 30～90

5. Input working power: single-phase 380/220V±10%, 50Hz

6. Ambient temperature: -10℃～+50℃

7. Relative humidity: <95%, no condensation

8. Scope of application:

1) Cable frequency conversion resonance device

2) Generator power frequency withstand voltage test device

3) AC withstand voltage test device for electrical equipment of substation

4) Resonant booster device for CVT inspection