The VLF AC Hipot Tester combines modern advanced digital variable frequency technology and micro computer control together, therefore, it can realize the full automatic voltage boost, stepdown, measurement and protection as well as the manual intervention in the process of automatic voltage boost. The full electronic design ensures the small size and light weight. The big LCD screen ensures the clear and visual display, and can display the output wave form. The printer outputs test reports.
link:https://www.transformer-tester.com/high-voltage-test-set/vlf-ac-hipot-tester/80kv-very-low-frequency-vlf-ac-hipot-tester.html