Intelligent monitor for transformer

The invention discloses an intelligent monitor for a transformer. The intelligent monitor comprises a current and voltage input circuit, a data acquisition circuit, a display circuit, a keyboard control circuit, a zero passage monitoring circuit, a minitype printer interface circuit, a clock circuit and a serial communication interface circuit, wherein the current and voltage input circuit is composed of a voltage mutual inductor, a current mutual inductor and a platinum resistor; an ATmega128 singlechip is applied to the data acquisition circuit; the zero passage monitoring circuit comprises a zero passage comparator; the voltage mutual inductor is connected with the ATmega128 singlechip by the zero passage comparator; the voltage mutual inductor and the current mutual inductor are connected with an analog-to-digital conversion chip by a filter circuit; the platinum resistor is connected with the analog-to-digital conversion chip by a temperature transmitter; the clock circuit, the serial communication inter