Quality factor requirements for series resonance: The quality factor for devices with a capacity less than 100kVA should not be less than 15, for devices with a capacity between 100kVA and 400kVA, it should not be less than 30, and for devices with a capacity greater than 400kVA, it should be greater than 40.
Grounding requirements for series resonant devices: All metal components with ground potential should have obvious grounding terminals, and the grounding terminal should not be less than φ 6.
Harmonic requirements for series resonant devices: The harmonic factor of the output voltage of the resonant device should not exceed 5%.
Series resonance test, the variable frequency series resonance device mainly consists of a variable frequency controller, excitation transformer, high-voltage reactor, high-voltage voltage divider, etc. Variable frequency controllers are divided into two categories: desktop controllers with 20kW and above, and portable box controllers with 20kW and below; It consists of a controller and a filter. The main function of a variable frequency controller is to convert a 380V or 200V AC power frequency sine wave with fixed amplitude and frequency into a sine wave with adjustable amplitude and frequency. And provide power for the entire equipment. The function of the excitation transformer is to raise the voltage output by the variable frequency power supply to the appropriate test voltage. The high-voltage reactor L is an important component of the resonant circuit. When the power frequency is equal to 1/(2 π√ LCX), it undergoes series resonance with the test sample CX.
Resonant application field: Variable frequency resonant testing devices are widely used in industries such as power, metallurgy, petroleum, and chemical engineering. The resonant testing device is suitable for the handover and preventive testing of high-capacity, high-voltage capacitive samples.
Wuhan UHV specializes in producing series resonance (also known as power frequency withstand voltage test equipment) and has been engaged in the electrical measurement industry for many years. Its products have first-class quality and welcome customers to come and purchase.