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5430/5431 -N three phase static energy meter is designed by using special large-scale integrated circuit (IC) and SMT technology. With advantages of few components, high reliability, it is widely used in measuring A.C. energy power. It conforms to the requirements specified in CEI IEC62052-11-2003 Electricity metering equipment (a.c.) General requirements, tests and test conditions Part 11: Metering equipment,CEI IEC62053-21-2003 Electricity metering equipment (a.c.) Particular requirements Part 21: Static meters for active energy (classes 1 and 2) Equipmen and DL/T645-1997 Multi-function Communication Protocol.