The XZB-W variable frequency series resonance without partial discharge is composed of a non partial discharge variable frequency power supply, a non partial discharge excitation transformer, a non partial discharge resistor, and a non partial discharge coupling capacitor voltage divider. The capacitor and reactor of the test sample form a series resonant connection; The voltage divider is connected in parallel to the test sample to measure the resonant voltage on the test sample and provide an overvoltage protection signal; The frequency modulation power output is coupled to the series resonant circuit through an excitation transformer, providing excitation power for series resonance. The variable frequency series resonance test device applies the principle of series resonance, uses an excitation transformer to excite the series resonance circuit, adjusts the output frequency of the variable frequency controller, and makes the circuit inductanceL and sample C resonate in series, and the resonant voltage is the voltage applied to the sample. The frequency conversion resonance test device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering, and is suitable for the handover and preventive testing of high-capacity, high-voltage capacitive specimens.

Huayi Power has the advantage of no partial discharge series resonance:

1. The non partial discharge power supply uses power amplification devices imported from Japan and adopts ABB's control technology. It can monitor the power factor, quality factor, and current, voltage, frequency, and other test data of the circuit in real time, and has complete protection functions such as overcurrent, overvoltage, zero crossing, undervoltage, and flashover, with stable performance;

2. The coil of the non partial discharge resistor is made of high temperature (200 ℃) resistant enameled wire wound in single or multiple strands, with an empty core cake structure and multiple oil channels. Each cake coil end is equipped with pressure equalization measures to ensure no partial discharge and low temperature. A dedicated airbag is installed inside to ensure the margin of oil thermal expansion and contraction, meeting the rated working requirements;

3. The excitation transformer without partial discharge adopts copper wire winding, oil immersed self cooling iron shell structure, and static shielding layers are set between the high and low voltage windings and the iron core, which are both excitation and isolation transformers, ensuring sufficient electrical and mechanical strength to prevent local discharge and corona discharge during rated operation;

Product nickname: Non partial discharge AC voltage withstand resonant device, variable frequency resonant, variable frequency series resonant, series resonant, series resonant transformerElectrical equipment frequency conversion series resonance withstand voltage device, series resonance test equipment, and non partial discharge series resonance.

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1. Non partial discharge series resonance has a small partial discharge capacity, which can ensure that the system's partial discharge capacity is within the range of 5pC (special requirements can be customized);

2. The outer shell is made of epoxy resin casting, and the non corona high-voltage insulation outer cylinder is wrapped with glass fiberThe reactor part adopts dry-type epoxy casting, which is beautiful and reliable, suitable for the requirements of various types of cables；

3. Low series resonant impedance without partial discharge, complete functions such as overvoltage and overcurrent flashover protection, high reliabilityLow requirements for on-site power supply；

4. The pressure equalization cover is processed using a dedicated mold and formed from aluminum plate, with a smooth surface, light weight, and easy installationGood experimental equivalence；

5. By selecting a power frequency intelligent measurement and control system, the high-capacity and high-voltage test device can achieve higher levels of intelligence and automation in system control, protection, and operation;

6. Use fiber optic communication and sampling to thoroughly isolate high and low voltage control circuits;

7. The experimental process can perform real-time status self inspection and displayMeets national standard requirements with peak monitoring function, capable of real-time monitoring of high-voltage test waveforms；

8. Having complete data and report management functionsEquipped with a micro printer, print and save test data at any time；

9. Can record and draw high-voltage U/T and I/T test curves;

10. This system requires that the weight of components that can be moved on-site by a single person should not exceed 30kg, and the weight of components that can be moved on-site by two people should not exceed 60kg, which is suitable for on-site handling;

11. The power supply adopts 220V single-phase power supply or 380V single power supply, which is convenient for on-site power supply;

12. Oil immersed reactors are used for the withstand voltage test of cables with voltage levels of 110kV and above. When the individual weight exceeds 100kg, our company's dedicated small electric crane can be optionally equipped;

13. Simple operation, small size, light weight, very convenient for on-site use and handling (volume and weight are about 1/10 to 1/30 of traditional test transformers;

14. Unique low harmonic patented technology, with a measured harmonic content of less than 0.3% at Wuhan High School, far below the national standard requirement of no more than 5%, greatly protecting equipment such as main transformers and generators from high-voltage harmonic damage;