Introduction to ETCXB Variable Frequency Series Resonance

product overview

The ETCXB variable frequency series resonance adopts a multi-stage superposition method, and multiple reactors can be used in parallel or series. The voltage divider is used to measure the test voltage and can also be used as a compensation capacitor for small capacitance test samples, allowing the resonance frequency to complete AC withstand voltage tests of various power equipment within the range of 30-300Hz. frequency conversionSeries ResonanceThe basic principle is to use adjustable (30-300Hz)Series ResonanceThe experimental equipment resonates with the capacitance of the test object to generate an AC test voltage.
Variable frequency series resonance consists of a variable frequency power supply, an excitation transformer (also known as an excitation transformer), a reactor, and a capacitive voltage divider. The capacitor and reactor of the test sample form a series resonant connection; The voltage divider is connected in parallel to the test sample to measure the resonant voltage on the test sample and provide an overvoltage protection signal; The frequency modulation power output is coupled to the series resonant circuit through an excitation transformer, providing excitation power for series resonance. The variable frequency series resonance test device applies the principle of series resonance, uses an excitation transformer to excite the series resonance circuit, adjusts the output frequency of the variable frequency controller, and causes the circuit inductance L and the test sample C to resonate in series. The resonance voltage is the voltage applied to the test sample. The frequency conversion resonance test device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering, and is suitable for the handover and preventive testing of high-capacity, high-voltage capacitive specimens.

Product characteristics

1. The required power capacity is greatly reduced, and the power required for the experiment is only 1/Q of the test capacity.
2. Small in size and light in weight, generally 1/3-1/5 of a regular testing device;
3. The frequency modulation and power components of the resonant power supply use the most advanced high-quality components imported from Japan. The designed resonant filter circuit can improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent harmonic peaks from causing false breakdown of the test sample.
4. The variable frequency power supply has strong protection function and good stability; It has multiple working modes including fully automatic (automatic tuning, automatic boosting), fully manual (manual tuning, manual boosting), and semi-automatic (automatic tuning, manual boosting, and manual tuning, automatic boosting), which can be switched and used freely; Easy to operate; Adopting 220V or 380V single-phase power supply for convenient on-site power supply.
5. Flexible configuration and strong expansion capabilities. The resonant reactor adopts multiple methods and modular combinations, which can be connected in series or parallel, meeting the testing requirements of various samples and making it more convenient for on-site use.
6. The large screen touch LED LCD color screen and external mouse can directly set various parameters, and the test results can be saved, printed, uploaded, and retrieved.

Product parameters

1. Resonant voltage waveform: sine wave, waveform distortion rate<1.0%
2. Output frequency: 30-300Hz
3. Work schedule: Continuous working time of 60 minutes at full power output
4. Quality factor: 30-90
5. Input working power supply: single-phase 380/220V ± 10%, 50Hz
6. Environmental temperature: -10 ℃ to+50 ℃
7. Relative humidity:<95%, no condensation condition
8. Scope of application:
1) Cable frequency conversion resonant device;
2) Generator power frequency withstand voltage test device;
3) AC voltage withstand test device for electrical equipment in substations;
4) Resonant boost device for CVT inspection.

Other name

Series resonance, frequency modulation series resonance, series resonance withstand voltage test device, series resonance test equipment, cable withstand voltage test device, power frequency withstand voltage test device, frequency modulation resonance, frequency modulation series resonance AC withstand voltage test device