By hvhipot 
The series resonance composed of reactor L and the tested capacitor C has a fixed resonance frequency F=1/(2 π√ L • C). When the test frequency is equal to this frequency, the circuit resonates. Using the principle of series resonance, the excitation transformer is used to excite the series resonant circuit, adjust the output frequency of the variable frequency power supply, and make the circuit inductance L and the test sample C resonate in series. The resonant voltage is the voltage applied to the test sample
Attention: (Please refer to the specific manual for details)
1. The variable frequency series resonant device should be used by professionals in high-voltage testing. Before use, the user manual should be carefully read and repeatedly operated and trained.
2. There should be no less than 2 operators. Strictly follow the safety operation regulations of HV Hipot Electric Co., Ltd. unit regarding high-voltage testing when using it.
3. In order to ensure the safety and correctness of the test, in addition to being familiar with the product manual, it is also necessary to strictly follow the relevant national standards and regulations for the test operation.
4. Each connecting wire must not be connected incorrectly, especially the grounding wire must not be connected incorrectly. Otherwise, it may cause damage to the testing device
5. When using a variable frequency series resonant device, the output is high voltage or ultra-high voltage, which must be reliably grounded and operated safely.
6. When the power is turned on and the voltage still cannot be increased after returning to zero, please press the reset button for a long time (about 10 seconds) and make the indicator lights on the control box panel normal, that is, no other red lights are on except for “high voltage”, and then start normal operation
7. When the voltage is greater than 10V and has not been tuned yet, the system will automatically detune to prevent high voltage damage to the test sample or even harm to the human body caused by resonance.
HV Hipot Electric Co., Ltd. specializes in producing series resonance (also known as variable frequency series resonance withstand voltage test device), engaged in the electrical measurement industry for many years. Its products have first-class quality and welcome customers to come and purchase.