30kv Very Low Frequency Cable Tester Vlf Cable Tester WUHAN PRIMARY TESTER TECH&SCIENCE CO., LTD. Base Info Model NO.:VLF-30Trademark:HuayingTransport Package:Wooden CaseOrigin:China (Mainland)HS Code:9030390000 Description Pre:Transformer Oil Dielectric Strength Testing Equipment/Insulating Oil Breakdown Voltage Tester Next:Very Low Frequency AC Tester for Cable Testing 30kv