By hvhipot 
HV Hipot Electric Co., Ltd. specializes in producing series resonance (also known as frequency modulation series resonance). Next, we will share with you the precautions for using frequency modulation series resonance.
(1) The power supply voltage and frequency should be stable, and resistors should be avoided for voltage regulation;
(2) The test voltage is directly measured at both ends of the test sample;
(3) When the test voltage is greater than the rated voltage of a single reactor, multiple reactors must be connected in series, and a dedicated insulation base must be added to the bottom of the relevant reactors.
(4) Reactors of different models and specifications cannot be simply mixed in parallel or series.
(5) When connecting reactors, specialized connecting wires should be used to ensure sufficient distance between reactors to minimize the impact of mutual inductance.
(6) When using a reactor, the surrounding metal objects should be removed, and it should be absolutely avoided to directly place the reactor on larger metal conductors such as steel plates and copper plates. Otherwise, the heating caused by eddy currents will increase the active input of the system, seriously affecting the test Q value, and even causing the test voltage to not reach the expected test value.
(7) When conducting high voltage tests, the high-voltage lead should use an expanded diameter wire, otherwise the corona of thinner wires will seriously affect the Q value, which may prevent the test voltage from rising to the expected test value.
(8) There should be no other objects within the same height range of the voltage divider body. The angle between the high-voltage lead and the voltage divider body should not be less than 90 °, and it should be straightened and tightened without dragging, and maintain sufficient insulation distance from surrounding objects.
(9) When conducting experiments, important magnetic recording equipment or objects (such as magnetic stripe recording cards, bank savings cards, etc.) should be kept away from the reactor at the test site, otherwise it may easily cause damage or data loss.
(10) Connect each grounding component with a dedicated grounding wire, so that only one point is connected to the grounding bus. Special attention should be paid to keeping the grounding terminal of the control box, excitation transformer, and voltage divider as short as possible to the O point of the ground wire group, and not arbitrarily extending the length of the grounding wire. To reduce the interference of magnetic leakage in the reactor, the grounding wire group should be placed in parallel with the high-voltage sampling signal line as much as possible. The wiring should be concentrated and not scattered, and kept away from the reactor. It is absolutely necessary to avoid the grounding wire group and high-voltage sampling signal line shuttling between the reactors!
(11) For pure high resistance equipment such as pure ceramic insulators, the series resonance test method is not suitable.