MSR – AC Resonant Test System

HAEFELY HIPOTRONICS series resonant test systems provide undistorted high voltage for testing high capacitive loads. It does so at a lower cost and with substantially lower single phase input power compared to conventional test transformers.


  • Patented reactor drive mechanism
  • Oil temperature indicator(s)
  • Pure AC sine wave at output
  • Option for a mobile system via air pads
  • Low PD operation (e.g. < 2pc for cable test applications)
  • No transient over voltages generated during flashover
  • PC based controls hardened for industrial & laboratory applications (with remote assistance)


  • Provides a protective voltage collapse should the device under test fail
  • Multiple Q values to meet a variety of applications
  • Turnkey PD test solutions including engineering services
  • Negligible harmonic distortion
  • Low input power required
  • Expandable
  • Internal divider (when applicable)
  • GIS
  • Transformers
  • Bushings
  • Cables
  • CTs, PTs and CCVTs
  • Aressters
  • Partial Discharge Testing
  • C & tan delta measurement