The impulse voltage test system is a testing equipment that simulates pulsed high voltage. In real life, pulsed high voltage is often encountered. For example, in nature, when lightning strikes, there will be extremely high pulsed current and voltage at the strike point, and a very high pulsed voltage will also be induced around it; another example is that the closing and opening operations of switchgear in the power system will also cause transient pulsed voltages. The amplitudes of these transient pulsed voltages are often above several tens of kilovolts or several hundred kilovolts, which will cause equipment damage and endanger personal safety. Therefore, conducting research on impulse voltage tests is very necessary. On the other hand, studying the discharge mechanism by simulating natural lightning phenomena is also very meaningful. If you need to purchase an impulse voltage generator, please contact us.
To generate a high-amplitude pulse voltage, the Marx multi-stage circuit invented in 1923 is still used, as shown in Figure 1. In this circuit, the three-stage capacitors are connected in parallel through a high-resistance RL and charged to voltage Uo by a DC voltage source. Then, they are synchronously discharged through three stages of spark gaps f and are connected in series, thereby obtaining a pulse voltage of nearly 3Uo on the test specimen. Although there are various different circuit connections in the actual use of the Marx circuit, the basic principle is the same.
The impulse voltage test system can generate various shapes of pulse waveforms. However, according to the requirements of the test research and in accordance with the relevant international and national standards, the main types of impulse voltage waveforms produced are as follows:
1. Standard lightning impulse waveform
2. Standard operation shock wave form
3. Other special types of impulse voltage waveforms, such as special operation impulse waves, etc.
For the impulse voltage waveform, three basic parameters are mainly specified to describe the shape of the waveform, namely peak voltage, wavehead time and wave tail time. The parameter definitions of the waveform are shown in Figure 2.
The impulse voltage test is one of the basic tests for high-voltage power equipment. After the design, manufacture, and repair of power equipment, impulse tests are required to verify or inspect the equipment. Common power equipment includes power transformers, power transformers, high-voltage switches, combined electrical apparatus, lightning arresters, power cables and accessories, bushings, and insulators, etc., all of which need to undergo impulse tests. An impulse voltage generator needs to be purchased. Please contact us.
The impulse voltage test is also one of the basic projects in high-voltage testing research. It is necessary to conduct impulse voltage tests in many aspects such as insulation coordination research, electromagnetic compatibility research, and discharge mechanism research.
Therefore, the impulse voltage test equipment has a wide range of applications. Different specifications of impulse test equipment can be seen in high-voltage test laboratories of factories, research institutions and colleges and universities. Figure 3 shows the 3200kV impulse voltage generator test system manufactured by our company for Xi’an High Voltage Electric Ceramics Co., Ltd. of Xidian Group. It is currently conducting an impulse test on a 500kV high-voltage bushing.
Post time: Jun-09-2026