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 Frequency modulation series resonant voltage withs
The series automatic frequency conversion resonance test device is mainly used for 10kV, 35kV, 110kV crosslinked rubber and plastic power cable, AC withstand voltage test for 66 kV, 110KV, 220kV switchgear (GIS), hydro and thermal generator or transformer AC voltage withstand test. The basic principle is to use the adjustable (30--300Hz) series resonant test equipment and the test product capacitance resonance to produce AC test voltage. Due to the large capacitance of the cable, the traditional power frequency test transformer is bulky, large, and the work of large current power supply site is not easy to obtain, so generally used in series resonant AC voltage withstand test equipment. The capacity of the input power supply can be reduced obviously, the weight is reduced, and the use and the transportation is convenient. In the initial stage, there are many disadvantages such as the 50Hz, the automatic level and the noise level, which are used in series resonant devices. So now most of the frequency conversion resonance, can get a higher quality factor (Q value), and has automatic tuning, multiple protection, as well as noise reduction, flexible combination of the advantages of light weight, etc.. |