Series resonance withstand voltage test equipment is the use of series resonant principle, the use of excitation transformer to stimulate the series resonant circuit, adjust the output frequency of the inverter controller, so that the loop inductance L and the sample C series resonance, resonant voltage is added to the sample voltage . The frequency conversion resonance test device is widely used in electric power, metallurgy, petroleum, chemical industry and other industries. It is suitable for the transfer and preventive testing of large-capacity, high-voltage capacitive test products.
Series resonant pressure test set complete sets of devices mainly from the inverter controller, excitation transformer, high voltage reactor, high pressure divider and other components. Variable frequency controllers are divided into two major categories, 20KW and above for the console type, below 20KW for the portable box type; it consists of controller and filter. The main function of the frequency conversion controller is to convert 380V or 200V sinusoidal alternating current of fixed amplitude and frequency into sine wave of adjustable amplitude and frequency. And provide power for the entire device. The role of the excitation transformer is to raise the output voltage of the variable frequency power supply to the appropriate test voltage. The high-voltage reactor L is an important part of the resonant circuit. When the power supply frequency is equal to 1/(2π√LCX), it is in series resonance with the test sample CX.
The series resonant pressure tester complete set has high stability and reliability. The system adopts imported power components as the core of power conversion, with stable voltage output and frequency output, reasonable EMC design, and perfect protection function. After many high-voltage direct-to-ground short-circuit tests, the system remains intact and the system has a strong overload. ability.
Series resonance withstand voltage test set complete automatic tuning function. When the system automatically tunes, it automatically sweeps from 30Hz to 300Hz to display the sweep frequency curve. The user can intuitively see the system tuning process. After the sweep frequency is completed, the system will initially find the resonant frequency in the range of ±5Hz according to the resonant frequency. The frequency sweep is performed with a resolution of 0.01 Hz, and the resonant frequency is accurately locked.
Series resonance withstand voltage test set supports multiple test modes. The system supports such test modes as "auto tuning + manual pressure adjustment", "auto tuning + auto voltage regulation", and "manual tuning + manual pressure adjustment". It is recommended to use the "auto tuning + manual pressure adjustment" mode to quickly find the resonance point. , but also through the manual pressure control test process, higher security.
Series resonance withstand voltage test complete set system friendly human-machine interface. The test parameter settings, test control, and test results are displayed on the same screen, which is intuitive and clear, and has automatic timing and operation prompting functions. Full touch screen operation and display, with test data saving and query functions.
Series resonance withstand voltage test equipment complete protection function. With zero protection (voltage output control knob is not zero, disable the system start), over-voltage protection, over-current protection, flashover protection and other functions to ensure the reliability of the system.
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