The series resonant test device (Frequency series resonance device) utilizes a tuning inductor and load capacitance to produce a power frequency series resonance, thereby obtaining a power frequency test voltage. The series resonant device consists of an isolation transformer, a frequency-modulated voltage-regulating power supply, an excitation transformer, a reactor, and a capacitive voltage divider. The capacitance of the test object and the reactor form a series resonant connection; the voltage divider is connected in parallel with the test object to measure the resonant voltage across it and serve as an overvoltage protection signal; the frequency-modulated power output is coupled to the series resonant circuit through the excitation transformer, providing the excitation power for the series resonance.
Main Technical Features
* One of the few in the country to pass the strict type test appraisal by the national department - the Electric Power Industry Electrical Equipment Quality Inspection and Testing Center (Wuhan High Voltage Research Institute), ensuring reliable quality and the safety of test personnel, test objects, and the test equipment itself;
* Compact size and light weight, especially suitable for on-site use;
* Complies with national standards: has the function of monitoring peak value/√2, allowing real-time monitoring of the test waveform; * Comprehensive and reliable protection against overvoltage, overcurrent, discharge, overheating, and zero-start, with an action time of 1 microsecond;
* The equipment comes with a built-in micro printer, allowing timely printing and saving of test data;
* Designed with military-standard anti-vibration and dust-proof features, resistant to long-distance transportation and harsh operating environments;
* One-key mouse-style knob "foolproof" operation, with a large-screen LCD display;
* Unique software calibration function, convenient for users to calibrate meters, ensuring the accuracy of high voltage values;
* German Rittal design all-aluminum alloy chassis, suitable for both vertical and horizontal use, lightweight and aesthetically pleasing, greatly facilitating on-site use;
* All major components are imported from world-renowned enterprises, including Texas Instruments and Intel from the United States, Siemens and Schneider from Germany, and Toshiba and Fuji from Japan, among others;
