Series resonance (also known as variable frequency series resonance test device) is suitable for AC withstand voltage testing of various large power transformers, power cables, steam turbines, hydro generators, and other capacitive equipment. It must be strictly carried out regularly according to the test regulations. Under power frequency conditions, due to the large capacitance of the test object or the high technical requirements for the test voltage, the variable frequency series resonance test detection device has high requirements for the power capacity and corresponding capabilities of the test research device. Traditional power frequency withstand voltage device designs often have a large volume and heavy weight, making it difficult to transport on the construction site and for students to freely combine products, resulting in poor flexibility. A good method is to use a pressure testing device to test the series resonant frequency.
The variable frequency series resonance test device is a series resonance test device that uses tuned inductors and load capacitors to generate power frequency series resonance and obtain power frequency test voltage. The frequency conversion series resonance test device consists of an isolation transformer (air pressure variable), a frequency and voltage regulation power supply, an excitation transformer, a reactor, and a capacitive voltage divider. The capacitor and reactor of the test sample form a series resonant network connection management method; The voltage divider is connected in parallel to the test sample to measure the resonant operating voltage on the test sample and provide an overvoltage protection environmental signal; The frequency modulation power data output is coupled to the series resonant circuit through an excitation transformer, providing information on the theoretical excitation power of the series resonant circuit.
The frequency conversion series resonance test device has super strong overload capacity:
Before leaving the factory, the complete set of equipment for variable frequency series resonance testing shall undergo a withstand voltage test of 1.2 times the rated voltage in accordance with the technical specifications to ensure that the variable frequency series resonance testing device meets the various on-site requirements of customers.
The automatic frequency regulation function of the variable frequency series resonance test device is powerful:
When the system is in automatic frequency modulation mode, the sweep curve is displayed from 30Hz to 300Hz, and users of the frequency conversion (frequency conversion) series resonance testing device can intuitively see the tuning process of the system After the frequency sweep is completed, the system performs a frequency (frequency) precision scan with a resolution of 0.01Hz within ± 5 range based on the resonant frequency point initially discovered during the sweep Finally, lock the resonant frequency point.
The variable frequency series resonance test device supports multiple test modes:
The system supports test modes such as "automatic tuning+manual voltage regulation", "automatic tuning+automatic voltage regulation", "manual tuning+manual voltage regulation", etc. It is recommended to use the "automatic tuning+manual voltage regulation" mode. The variable frequency series resonance test device can quickly find the resonance point and control the test process through manual voltage regulation, with higher security.
Variable frequency series resonance test device system, user-friendly human-machine interaction:
The setting of experimental parameters, experimental control, and experimental results are displayed on the same screen, which is intuitive and clear, and has automatic timing and operation prompt functions; The full touch screen operation and display, frequency conversion series resonance test device has the function of saving and querying test data.