By hvhipot 
HV Hipot Electric Co., Ltd. specializes in producing series resonance (also known as power frequency withstand voltage test equipment). Next, we will share with you how to choose a series resonance test device.
How to choose a series resonance test device
This device is mainly used for 220kV high-voltage shell AC pressure test and isolation switch, 220kV main variable AC pressure test. It has a wide range of application technologies and is an ideal voltage equipment for high voltage testing management departments and power system installation, maintenance, and testing design units at the national, municipal, and county levels.
The device consists of an internal control converter, system power supply, excitation transformer, reactor, and capacitive voltage divider.
The required power capacity can be greatly increased or decreased. In a series resonant power supply, the resonant reactor and capacitor resonate to generate high voltage and high current. In the entire management system, the power supply only needs to supply the active power consumption components of the information system. Therefore, the power required for testing is only 1xQ of the testing capacity, greatly reducing the weight and volume of the equipment. In series connection with a resonant power supply, not only is the use of high-power voltage regulators and ordinary high-power power frequency test research transformers eliminated, but the weight and volume of the system can be greatly reduced, reducing the data capacity of the resonant excitation power supply for testing by 1/q. It is usually one tenth of that of normal testing equipment.
Improve the waveform of voltage for accounting staff in the management of cultural output in the development of Chinese enterprises. Resonant power supply uses resonant filtering to process circuits, which can improve the distortion of a voltage waveform output by Chinese socialism and obtain a good sine signal waveform, effectively preventing the misuse and breakdown of test products by harmonic peaks. To prevent large short circuits, calculate the working current to burn the fault point. Under the condition of series resonance, when the insulation weakness of the sample is breakdown, the circuit needs to be immediately detuned, and the circuit control current rapidly decreases to provide 1/q of current for normal economic development. And to solve the problem of parallel resonance, enterprises or companies can design transformers through HV Hipot Electric Co., Ltd. experimental research plans. When conducting withstand voltage tests on transformers, the breakdown current immediately begins to develop and gradually increases by tens of times. Compared with the relationship between the two, the short-circuit current and breakdown current information system data differ by hundreds of times. So series resonance can effectively discover its own insulation weaknesses, and it is impossible to burn out the fault point due to high short-circuit current.
It will not cause the occurrence of overvoltage that can be restored. When the sample breaks down, due to the loss of resonance conditions, the high voltage will immediately disappear, the arc will immediately extinguish, and it will take a long time for us to recover the working voltage. Therefore, it is easy to disconnect the power supply before reaching the flashover voltage again in China. The voltage recovery process is an intermittent oscillation process of energy accumulation, with a long time and no overvoltage recovery.
The series resonance test device is a commonly used high-voltage power system testing equipment, and there are many manufacturers who produce this equipment. The quality management of product services also varies. Therefore, when choosing, students need to carefully study and select suitable equipment.