IEC 62053-23-2020 Electricity metering equipment – Particular requirements – Part 23: Static meters for reactive energy (classes 2 and 3)

IEC 62053-23-2020 Electricity metering equipment – Particular requirements – Part 23: Static meters for reactive energy (classes 2 and 3). This document does not apply to: • meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V; • meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61 869 series) when tested without such transformers; • metering systems comprising multiple devices (except LPITs) physically remote from one another; • portable meters; NOTE 6 Portable meters are meters that are not permanently connected. • meters used in rolling stock, vehicles, ships and airplanes; • laboratory and meter test equipment; • reference standard meters; • data interfaces to the register of the meter; • matching sockets or racks used for installation of electricity metering equipment; • any additional functions provided in electrical energy meters. This document does not cover measures for the detection and prevention of fraudulent attempts to compromise a meter’s performance (tampering). NOTE 7 Nevertheless, specific tampering detection and prevention requirements, and test methods, as relevant for a particular market are subject to the agreement between the manufacturer and the purchaser. NOTE 8 Specifying requirements and test methods for fraud detection and prevention would be counterproductive, as such specifications would provide guidance for potential fraudsters. NOTE 9 There are many types of meter tampering reported from various markets; therefore, designing meters to detect and prevent all types of tampering could lead to unjustified increase in costs of meter design, verification and validation. NOTE 1 0 Billing systems, such as, smart metering systems, are capable of detecting irregular consumption patterns and irregular network losses which enable discovery of suspected meter tampering. NOTE 1 1 For transformer operated meters paired with current transformers (CTs) according to IEC 61 869-2: – the standard CT measuring range is specified from 0,05 I n to I max for accuracy classes 0,1 , 0,2, 0,5 and 1 and these CTs are used for meters of class 2 and 3 according to this document; – the special CT measuring range is specified from 0,01 I n to I max for accuracy classes 0,2S and 0,5 S and these CTs are used for meters of class 0,5 S and 1 S according to IEC 62053-24; – combinations of standard CTs and meters of class 0,5 S and 1 S are subject to an agreement between manufacturers and purchasers....