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              GDTF Variable Frequency AC Resonant Test SystemGDTF Series AC Resonant Test System For Cables are composed of frequency/voltage adjustment power supply, excitation transformer, reactors and capacitive divider.The power frequency can be adjustable, which make the reactor and tested capacitor resonance. 
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              GDTL AC Resonant Test System for GeneratorsGDTL series AC Resonant Test System for Generators can be used by adjusting inductance of the reactor, or adjusting the work way of resonant frequency of the system to achieve resonance. 
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              GDTL- AC Inductance Resonance Test System for CVTGDTL AC Resonant Test System for CVT is series resonance with power frequency specially for CVT. 
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              GDTF-2700kVA/900kV AC Resonant Test SystemGDTF-2700kVA/900kV is specially designed for AC withstand voltage test for 500kV or below switch, GIS, instrument transformers and neutral point of main transformers.The system includes Variable frequency power supply, exciting transformer, reactor, and capacitive voltage divider. 
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              AC High Voltage Test Sets for GISAC Resonant Test System for Substation Electrical Equipment, is mainly composed of variable frequency power supply, Excitation Transformers, Reactors, Capacitive dividers, which designed for AC withstand voltage test of substation electric equipment at 500kV or below. 
