Advantages of Variable Frequency Series Resonance Withstand Voltage Test Device - Yangzhou Dary
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1. The required power capacity for testing is greatly reduced
Because the power supply of the series resonance withstand voltage test device uses the resonance between the resonant reactor and the test object's capacitance to generate high voltage and large current, in the test system, the power supply only needs to provide the active power consumption part in the test system, so the required power capacity for testing is greatly reduced.
2. The weight and volume of the entire test device are significantly reduced
The power capacity of the device is reduced, which eliminates the need for large and bulky high-power voltage regulators and ordinary high-power power frequency test transformers. Therefore, the volume and weight of the entire device are greatly reduced.
3. The output voltage waveform of the device is improved
Because the resonant power supply of this device is a resonant filter circuit, it not only improves the waveform distortion of the output voltage and obtains a good sine waveform, but also plays a significant role in preventing false breakdown of the test object caused by harmonic peaks.
4. Large short-circuit currents that burn fault points are prevented
When the test device is in series resonance state, if the insulation weakness of the test object is broken down, the circuit will immediately detune, and the loop current will quickly drop to 1/Q of the normal test current. However, when using parallel resonance or test transformer method for withstand voltage test, the breakdown current will immediately rise by dozens of times. The two different test methods show that the short-circuit current and breakdown current differ by hundreds of times. Therefore, series resonance can effectively find insulation weaknesses without the concern of large short-circuit currents burning fault points.
5. The test device will not produce any form of recovery overvoltage
When a breakdown occurs during the test, due to the loss of resonance conditions, the high voltage immediately disappears, the arc is immediately extinguished, and the re-establishment process of recovery voltage is very long. The test can easily disconnect the power supply before reaching the flashover voltage again. This voltage recovery process is an intermittent oscillation process with energy accumulation, which is very long and does not produce any recovery overvoltage. Therefore, the entire test is both effective and safe!
Note: The above information and technical parameters are compiled and released by Yangzhou Dary Electric Co., Ltd.
