What are the precautions and advantages of using a variable frequency series resonance test device? Wuhan UHV specializes in producing series resonant devices, with a wide range of product selection and professional electrical testing. When looking for series resonant devices, choose Wuhan UHV.
Precautions for using the variable frequency series resonance test device
1. The variable frequency series resonance test device is a high-voltage testing equipment that requires professional high-voltage testing personnel to use. Before use, the user manual should be carefully read and repeatedly operated and trained.
2. There should be no less than 2 operators. Strictly follow the safety operating procedures for high-voltage testing when using.
3. In order to ensure the safety and correctness of the test, in addition to being familiar with the product manual, it is also necessary to strictly follow the relevant national standards and regulations for the test operation.
4. Each connecting wire must not be connected incorrectly, especially the grounding wire must not be connected incorrectly. Otherwise, it may cause damage to the testing device.
5. When this device is in use, it outputs high voltage or ultra-high voltage. Reliable grounding is necessary, and attention should be paid to the safe distance of operation.
6. The series resonance test system uses a resonant reactor to resonate with the test object to generate high voltage. That is to say, whether high voltage can be generated mainly depends on whether the test object resonates with the resonant reactor. Therefore, when the test personnel analyze that the required high voltage cannot be generated on site, they should analyze what damages the resonance conditions, whether the circuit is connected, etc. The excitation transformer of the series resonance test system has specific voltage and current requirements. When selecting substitutes, voltage and current must be considered, and ordinary test transformers with the same capacity cannot be used.
Advantages of Frequency Conversion Series Resonance Test Device in Power System Applications
1. The required power capacity is greatly reduced. Series resonant power supply generates high voltage and high current through resonance between resonant reactor and the 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 experiment is only 1/Q of the test capacity.
2. The 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 capacity, greatly reducing the weight and volume of the system, usually 1/3-1/5 of ordinary test devices.
3. Improve 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. Hot selling products: Variable frequency series resonance test device, Variable frequency series resonance test device, Variable frequency series resonance test device
4. 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 disengages and the loop current rapidly drops to 1/Q of the normal test current. However, when conducting voltage withstand tests in parallel resonance or test transformer mode, the breakdown current immediately increases by several tens of times. Compared with the two, the short-circuit current is hundreds of times different from the breakdown current. So, series variable frequency resonance can effectively identify insulation weaknesses without the concern of large short-circuit current burning the fault point.
5. There 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.