The three-phase AC current transmitter is an instrument that simultaneously isolates and amplifies three-phase measured AC signals and converts them into a DC voltage or current that is linearly proportional to the input current. It is widely used in power systems and non-electricity. In the system, it can run continuously for a long time to realize the measurement of AC current. This series of products has high measurement accuracy and good conversion linearity. Among them, the true RMS measurement transmitter does not affect the measurement accuracy of the instrument due to the distortion of the input signal.