... 62053-21, IEC 687Option:Communication: RS485, IR, RF, PLCC4 tariffs and 8 tariffs termMeasuring parameter:kVarh, kVAh, kW, Hz, 3x(A ... ,V), cos, pfSecurity feature Temper & fraudClass 0.5 for active energy Technical Data Rated Ampare10(40)A20(80)APhase ... / 1min)4kVElectromagnetic CompatibilityTo IEC 62052-1LifeMore than 10 Years Circuit Board for Multifunction Electricity Meter (3P4W)