Aya Instruments - Current Measuring Clamp on Transformers, Current Clamps Theory

Aya Instruments - Current Measuring Clamp on Transformers, Current Clamps Theory: "CURRENT CLAMPS for MEASURING AC and DC CURRENT

AC current transformers can only measure the changing magnetic field of an AC current. DC currents generate a non-changing magnetic field that can only be measured magnetically by a HALL-EFFECT sensor. The sensor generates an accurate signal that is proportional to either a DC or an AC current. The AYA AC/DC current clamps incorporate two HALL-EFFECT sensors located in the magnetic path. A battery-operated circuit is required to provide the excitation and amplification of the signal generated by the HALL-EFFECT sensor. The two matched sensors provide an output signal which is independent of the location of the current conductor in the clamp opening. The conductor does not have to be exactly at the center of the opening."

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