Three-phase voltage current digital display electric measuring instrument

The utility model relates to a three-phase voltage current digital display electric measuring instrument. A circuit part comprises a signal measuring part, a display part and a power supply part, wherein the signal measuring part comprises a preceding stage signal processing circuit and a signal sampling and calculating circuit, and the display part comprises a display drive circuit and a digital display tube. The utility model is characterized in that the signal sampling and calculating circuit uses an MSP430F1XX single chip computer, the single chip computer is integrated with an A/D collecting maintenance module, a 16 bit CPU and an information storing space, wherein the output end of the preceding stage signal processing circuit is connected with the input end of the A/D collecting maintenance module of the MSP430F1XX single chip computer, and an I/O port of the MSP430F1XX single chip computer is connected with the input end of the display drive circuit. The output end of the display drive circuit is connected with a tube pin of a stroke section of the digital display tube, and a plurality of I/O ports of the MSP430F1XX single chip computer are connected with tube pins at the common end of the digital display tube. The utility model has the advantages of little cost of hardware, high operational capability and little space occupation.