1The required power capacity is greatly reduced. Series resonant power supply generates high voltage and high current through resonance between resonant reactor and tested capacitor. In the entire system, the power supply only needs to provide the active consumption part of the system. Therefore, the required power supply for the test is only 1/Q of the test capacity.

2The weight and volume of the equipment have been greatly reduced. In a series resonant power supply, not only is the bulky high-power voltage regulating device and ordinary high-power power frequency test transformer eliminated, but the resonant excitation power supply only requires 1/Q of the test capacityThis greatly reduces the weight and volume of the system, typically by 1/10-1/30 of a regular testing device.

3Improve the waveform of the output voltage. A resonant power supply is a resonant filtering circuit that can improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent the accidental breakdown of the test sample by harmonic peaks.

4To prevent large short-circuit currents from burning the fault point. In the series resonance state, when the weak point of the insulation of the test sample is broken down, the circuit immediately loses resonance, and the loop current rapidly drops to 1/Q of the normal test currentWhen conducting voltage withstand tests using parallel resonance or test transformer methods, the breakdown current immediately increases by several tens of times. Compared to the two, the short-circuit current and breakdown current differ by hundreds of times. So, series resonance can effectively identify insulation weaknesses without the concern of large short-circuit currents burning the fault point.

5There will be no overvoltage recovery. When the test sample breaks down, due to the loss of resonance conditions, the high voltage immediately disappears, the arc immediately extinguishes, and the process of re establishing the recovery voltage is long. It is easy to disconnect the power supply before reaching the flashover voltage again. This voltage recovery process is an intermittent oscillation process of energy accumulation, which is long and does not result in any recovery overvoltage.

Hangtai Electric HTXZ Variable Frequency Series ConnectionMain functions and technical characteristics of resonant devices:

1The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover). The overvoltage and overcurrent protection values can be set according to user needs. When the test sample flashes, the flashover protection action can be taken and the flashover voltage value can be recorded for experimental analysis.

2The entire device is lightweight and easy to use on site.

3The device has three working modes, which facilitate users to flexibly choose according to the on-site situation and improve the testing speed.

The working modes are: fully automatic mode, manual mode, automatic tuning, and manual boost mode

4It can store data with numerical numbers, making it convenient for users to identify and search.

5When the device automatically scans the frequency, the starting point of the frequency can be set arbitrarily within the specified range, and the scanning direction can be selected up or down. At the same time, the LCD screen displays the scanning curve, making it convenient for users to intuitively understand whether the resonance point has been found.

6Adopting DSPPlatform technology can easily add or remove functions and upgrade according to user needs, making the human-machine exchange interface more user-friendly.