The series resonant test device (Frequency series resonance device) utilizes a tuning inductor and load capacitance to produce power frequency series resonance, thereby obtaining the power frequency test voltage. The series resonant device consists of an isolation transformer, a frequency conversion and voltage regulation 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 conversion power output is coupled to the series resonant circuit through the excitation transformer, providing the excitation power for 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;

* Small size, light weight, especially suitable for on-site use;

* Complies with national standard requirements: has the function of monitoring peak value/√2, can monitor the test waveform in real time; * 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, which can promptly print and save test data;

* 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 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 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, and Toshiba and Fuji from Japan, etc.;