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  • Current Transformer Measurements
    The Current Transformer (CT) is used to sense AC current in single-phase or three-phase mains circuits. The CT typically has a 1A or 5A AC secondary that connects to a current, power or energy meter. This allows the meter to be located away from the mains wiring. CTs are available in a variety
  • Sizing a Motor CT
    Use this chart to select the CT rating for various motor sizes. This chart applies to three phase AC induction type, squirrel cage and wound rotor motors. Also see related article on Current Transformer Ratings and Wire Length Chart.

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