Weak input type intelligent electric meter

The utility model discloses a weak input type intelligent electric meter, comprising a CPU. The weak input type intelligent electric meter is characterized in that after performing treatments of isolation, anti-aliasing, filtering, sampling offset superposition, etc. on three-path voltage channel weak input signals and three-path current channel weak input signals, a weak input signal electric energy metering circuit is accessed; the weak input signal electric energy metering circuit is connected with the CPU; and the weak input signal electric energy metering circuit is isolated by a photocoupler, and outputs an active power electric energy pulse and a reactive power electric energy pulse. The weak input type intelligent electric meter is convenient in field use and maintenance, and satisfies the basic technical requirements of intelligentized stations such as intelligent substations for intelligent equipment and the requirement for a measurement unit.