Three-phase alternating-current electric quantity acquisition device

The utility model discloses a three-phase alternating-current electric quantity acquisition device belonging to the field of electric quantity acquisition. The three-phase alternating-current electric quantity acquisition device comprises: an acquisition unit for acquiring an external electric signal and converting the acquired external electric signal into a digital signal; a control unit for reading the value of the digital signal of the acquisition unit after analog-digital conversion, converting the read value of the digital signal into a value identified by a user and uploading the value to an upper computer; and an overcurrent protection unit for outputting a preset protection signal when the value after the conversion of the control unit exceeds an overcurrent protection set value. The three-phase alternating-current electric quantity acquisition device carries out preset operation when overcurrent occurs, so as to ensure the normal work and the high safety of the device.