Static Single-Phase Electric Energy Meter uses advanced special recording integrated circuit with high precision DDS-1Y-18L Mainly used in AC single-phase watt-hour with its recording frequency of 50Hz, it is highly accurate, reliable, durable, low power consumptive, without reversion, creep-proof, anti-tampering, bilateral recording with strong overloading capability. It conforms to the related requirements of GB/T17215-1998. /IEC1036