AC Resonant Test System is mainly used for 10kV,35kV,and 110kV cross-linked rubber power cables,66kV,110kV,and 220kV

　　Variable frequency AC withstand voltage test for combination electrical appliances(GIS),and power frequency AC withstand voltage test for hydraulic and thermal generators or power transformer channels.

　　The basic principle is to use an adjustable(30-300Hz)series resonance test equipment to generate AC test voltage through resonance with the tested capacitor.Due to the large capacitance of cables,traditional power frequency test transformers are bulky,bulky,and difficult to obtain on site high current working power supplies.Therefore,series resonant AC withstand voltage test equipment is generally used.Its input power capacity can be significantly reduced,weight reduced,and convenient for use and transportation.In the initial stage,adjustable series resonance equipment(50Hz)was often used,but there were disadvantages such as poor automation and high noise.Therefore,nowadays,variable capacitance frequency resonance is mostly used to obtain higher quality factors(Q

　　It has the advantages of automatic tuning,multiple protections,noise reduction,flexible combination,and light weight per piece.