CDG 7000 is presently of standard use at CERN for testing all magnets in the accelerators and experimental lines of any type (normal conducting and superconducting, small and large).
“To trigger a fault which is not a fully zero resistance fault you need enough energy, which means a bigger capacitor.”
“Letting the coil resonate with its parasitic capacitance means such a low energy test that could lead to miss insulation faults between turns.”
IMPULSE WINDING TESTER CDG 7000 is easy to use and you will save money
The insulation faults between turns are detected either by comparison of the reference’s coil waveform with the coil under test or by observing a change in the ringing frequency of the DUT.