Is AC Resonant Test System with Variable Frequency and frequency modulation series resonance an inst

　　Is AC Resonant Test System with Variable Frequency and frequency modulation series resonance an instrument? 　　No,it's not

　　AC Resonant Test System with Variable Frequency is suitable for AC voltage withstand tests of various large power transformers,power cables,steam turbines,hydro generators,and other capacitive equipment,which must be strictly carried out in accordance with the test regulations on a regular basis.Under power frequency conditions,due to the large capacitance of the test object or the high requirements for the test voltage,there are also high requirements for the power supply capacity of the test device.Traditional power frequency withstand voltage devices often have large single volume,heavy weight,and are not easy to carry on site,and are not easy to combine arbitrarily,resulting in poor flexibility.

　　The AC withstand voltage tests of various large power transformers,power cables,steam turbines,hydro generators,and other capacitive equipment must be carried out strictly in accordance with the test regulations on a regular basis.Under power frequency conditions,due to the large capacitance of the test object or the high requirements for the test voltage,there are also high requirements for the power supply capacity of the test device.

　　At present,a better method is to conduct a voltage withstand test using frequency modulation series resonance equipment.This frequency modulation series resonance is designed for the AC withstand voltage test of high voltage and high current capacitive specimens such as power cables.This resonance test device adopts the method of adjusting frequency and adjusting the air gap of the iron core for tuning,which can conveniently and accurately find the resonance point.At the same time,it can also meet the requirements of different specimens and regulations in different places,so that the resonance frequency is fixed within the required range.The quality factor of the system can reach 20-80,making it lightweight and simple;This resonance test device adopts various protective measures,making the test convenient and reliable;The inherent filtering effect of resonance ensures that the waveform output by the system fully meets the requirements of the test regulations.