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Current Measurements

Current measurement (2.5 kA for 10 ms) with EHT integrator and Rogowski coil (pink) and current transformer (green). Blue is switching waveform.

EHT integrators have been used for high current measurements in applications were current transformers saturate. The figures shows a 2.5 kA current pulse for 10 ms. The current transformer (green) saturates after a few milliseconds. The EHT integrator, paired with a Rogowski coil, was able to measure the whole pulse. The kink in the current trace is due to a pre-programmed change in the pulse width.