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CT selection for measurement of PWM waveform

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    CT selection for measurement of PWM waveform

    Re: Large motor test stand

    Looking for help with (or good source for) a proper CT selection for measurement of a PWM waveform

    I need to select a CT with a frequency response broad enough to cover the switching frequency of the PWM inverter drive (Approx. 600Hz)....at least two times the maximum switching frequency of 300Hz.

    Various current ranges should be considered....ranges between 1,100A and 4,200A @ 690V. Not sure of the accurance with this broad of range.

    This test stand is also capable of sine wave voltages at 60Hz.

    Any help or sources would be appreciated.
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