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What are the reasons why the equipment voltage did not reach the expected value during the frequency conversion series resonance test?

:2023-10-26 10:23:02:

The frequency conversion series resonance testing device is an important equipment commonly used in power systems, used to test the operational performance of power equipment at different frequencies. However, sometimes we may find that the voltage does not rise as expected when using this device. This article will explain in detail the reasons why the variable frequency series resonance test device does not boost voltage.

1. Insufficient power supply:

In practical applications, we usually use AC power to supply the frequency converter, but if the power voltage is unstable or the power capacity is insufficient, it will cause the frequency converter to be unable to provide sufficient voltage to the tested equipment. In addition, the frequency of the power supply voltage also needs to match the rated frequency of the tested equipment, otherwise it will also affect the increase in voltage.

2. Test equipment mismatch:

Improper selection of testing equipment, which does not match the voltage level, inductance, and other parameters of the tested equipment, resulting in insufficient voltage output. Frequency converters typically have multiple parameters that can be adjusted, including output frequency, output voltage, etc. If these parameters are not set correctly, it will cause the voltage to not increase. Therefore, when using a frequency conversion series resonance testing device, we need to ensure that the parameters of the frequency converter are set correctly to ensure that the voltage can reach the expected increase level.

3. Equipment malfunction:

The device itself has faults, such as problems with frequency converters, power supplies, or control systems, which prevent it from providing sufficient voltage output. The design and quality of the frequency conversion series resonance test device itself will also affect the increase in voltage. If the design of the device is unreasonable or the quality is not up to standard, it will result in the inability to increase the voltage. Therefore, when selecting and purchasing a frequency conversion series resonance testing device, we need to choose a reputable and reliable manufacturer to ensure that the device can operate normally and provide sufficient voltage rise.

4. Resonance conditions not met:

In the frequency conversion series resonance test, it is necessary to meet the resonance condition, that is, the resonance reactance in the test circuit is equal to the inductance of the tested equipment. If the resonance conditions are not met, the device may not be able to obtain the maximum voltage output, which may cause the boost voltage to not reach the expected value. Some devices may experience voltage drop during operation, which can cause the frequency conversion series resonance test device to fail to raise the voltage to the expected level. Therefore, before conducting the experiment, we need to understand the characteristics of the tested equipment and adjust the parameters of the variable frequency series resonance test device according to the actual situation to ensure that the expected voltage rise can be achieved.

5. Improper test operation:

During the testing process, operators may make operational errors or be unfamiliar with the correct use of the testing device, resulting in equipment voltage not reaching the expected value.

In summary, the reasons for the equipment not reaching the expected voltage boost may include equipment failures, insufficient power supply, unsatisfactory resonance conditions, mismatched test equipment, and improper test operation. When conducting experiments, it is necessary to carefully check the equipment status and power supply, ensure that the test device matches the tested equipment, and strictly follow the operating procedures to ensure the accuracy and reliability of the test results.


The ZCVF-A series variable frequency series resonance testing complete device is suitable for AC withstand voltage testing of transformers, circuit breakers, switches, GIS systems, cables, bushings, insulators, and other equipment. Equipped with multiple protection functions such as high-voltage overvoltage protection, low-voltage overcurrent protection, as well as detuning protection, zero position, flashover protection, emergency shutdown, undervoltage protection, etc. It can meet the requirements of high voltage and low current equipment testing conditions, as well as low voltage and high current equipment testing conditions, and has a wide range of application.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.

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