AC Resonant Test Set

The main function of the AC resonant test set is to perform withstand voltage tests on high-voltage electrical equipment (such as cables, transformers, and switchgear) to detect the withstand voltage capability of the equipment under high voltage conditions. Its working principle is to use the resonance effect of reactors and capacitors to minimize the circuit reactance and increase the current at the resonant frequency. In this way, the system only needs to apply a lower input power (i.e., a smaller input voltage and current) to generate a high voltage output at the resonance point, thereby applying the required high voltage to the device under test for testing to ensure that it will not fail in actual operation.

The AC resonant test set has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover)

The entire device is lightweight and easy to use on site

Adopting DSP platform technology

Large Capacity Output
The AC resonant test set has a rated capacity of 4000kVA and can provide high voltage outputs of 200kV, 400kV and 800kV, as well as rated currents of 20A, 10A and 5A. This high capacity and high voltage output design enables it to meet the testing needs of high-power equipment, such as withstand voltage tests of high-voltage cables, transformers and switchgear.

Adjustable Frequency Range
The operating frequency range of the AC resonance test set is 30 to 300Hz, and it can match the resonance point of different equipment by adjusting the frequency. This adjustable frequency design allows the test set to flexibly adapt to the testing needs of different equipment. For example, for a transformer with a resonant frequency of 45Hz, the test system can adjust the frequency to 45Hz to achieve the best test effect.

Low Waveform Distortion Rate
The output voltage of the test set is a sine waveform with a waveform distortion rate of no more than 1%, ensuring the stability and reliability of the test voltage and avoiding test errors caused by unstable waveforms. In the withstand voltage test of high-voltage equipment, it is very important to maintain a stable sine wave output, because it can more realistically simulate the voltage environment of the equipment in actual work, so as to more accurately reflect the performance of the equipment.

Excellent Quality Factor
The quality factor of the AC resonant test system can reach more than 30 at a frequency of 45Hz. The quality factor is an indicator to measure the performance of the resonant system. The higher the value, the lower the loss and the higher the efficiency of the system at resonance. The characteristics of high quality factor enable the test device to achieve higher voltage output at lower input power, which can effectively reduce energy consumption and cost during the test process, and is suitable for efficient long-term testing.

Continuous Working Ability
The AC resonant test set can work continuously for 60 minutes under rated load. This continuous working ability comes from its efficient cooling system and high temperature resistant components. The cooling system includes an efficient heat sink and a forced air cooling structure, that is, a high-power fan is used to force air flow to quickly take away the heat generated inside the equipment; at the same time, the heat sink expands the heat dissipation area and enhances the heat dissipation effect. In addition, the components in the device are made of high-temperature resistant materials and will not deform even at high temperatures. These designs ensure the stability and safety of the equipment during long-term high-intensity work, making it particularly suitable for use in scenarios that require long-term continuous work, such as power system inspections and equipment factory inspections.

1. Power and High Voltage Testing
Power cables: Conduct voltage withstand testing on cross-linked polyethylene power cables.
GIS and switchgear: Testing GIS (gas insulated switchgear) and SF6 switches.
Transformers and generators: Conduct power frequency withstand voltage and induction withstand voltage tests on large transformers and generator sets.

2. Industry and Metallurgy
Metal smelting: In the metallurgical industry, efficient power supply is provided for smelting iron, steel, and non-ferrous metals, which can achieve "one electricity, two furnaces".
Induction heating: used for surface quenching, heat transfer, annealing and other heat treatment processes of metal workpieces.
Welding: Used in scenarios such as inverter welding machines and diffusion welding (brazing).

3. Environmental Protection and New Materials
Ozone generation: provides high-voltage power to ozone generators for water treatment and air purification.
Material processing: Used for surface treatment and other processes of materials.

4. Medical equipment
Medical imaging: used in magnetic resonance imaging (MRI) systems to improve image quality by placing the RF coil in a resonant state.
Medical power supply: wireless power supply system for implantable medical devices and high-voltage power supply for X-ray machines.

5. Communication and Electronics
Signal processing: As a frequency selector, it is used for signal filtering and amplification in communication systems.
Wireless charging: Utilizing resonance characteristics to achieve efficient wireless energy transmission, used in fields such as wireless charging and RFID.

6. Other fields
Railway electrification: related testing applied to railway systems.
Research experiment: as a typical circuit for studying resonance phenomena in teaching and research

1. How to deal with the unqualified test data of the AC resonant test set?
Firstly, eliminate wiring errors and environmental interference factors, and re measure. If it is still not qualified, it should be reported to the equipment management department for further inspection.

2. Can the series resonant withstand voltage test device be used for the detection of GIS equipment?
It is necessary to confirm whether the interface and range of the series resonance withstand voltage test device match the detection requirements of GIS equipment. Some GIS equipment requires dedicated adapters.

3. Do I need to discharge after the experiment is completed?
must. After the voltage withstand test is completed, the tested equipment must be fully discharged through a discharge rod before the wiring can be removed to ensure safety.

4. How long does the battery life of the frequency conversion series resonance complete set device last?
It can work continuously for about 4 to 6 hours when fully charged. It is recommended to prepare a backup battery or use an external power adapter on site.

5. Is the measurement result of AC resonant test set greatly affected by temperature?
It has an impact. When used within the ambient temperature range of 5 ℃ to 40 ℃, there may be deviations in measurement data at extreme temperatures.

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