The series resonant test device (Frequency series resonance device) utilizes a tuning inductor and load capacitance to generate power frequency series resonance, thereby obtaining a power frequency test voltage. The series resonance 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 on the test object 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 series resonance.

Main Technical Features


* It is one of the few in the country to pass the strict type test appraisal by the national department - 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 test equipment itself;
* Small size, light weight, especially suitable for on-site use;
* Meets national standard requirements: has peak value/√2 monitoring function, can monitor test waveform in real time; * Overvoltage, overcurrent, discharge, overheating, and zero-start protection are comprehensive and reliable, with an action time of 1 microsecond;
* The device comes with a built-in micro printer, which can print and save test data in a timely manner;
* Designed with military standard anti-vibration and dustproof features, resistant to long-distance transportation and harsh usage environments;
* One-key mouse-style knob "foolproof" operation, with large screen LCD display;
* Unique software calibration function, convenient for users to calibrate meters, ensuring high voltage value accuracy;
* German Rittal design all-aluminum alloy chassis, dual-use for vertical and horizontal placement, lightweight and beautiful, 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, Toshiba and Fuji from Japan, etc.;