IEC 62055-31-2005 pdf – Electricity metering – Payment systems – Part 31: Particular requirements – Static payment meters for active energy (classes 1 and 2).
1 Scope This part of IEC 62055 applies to newly manufactured, static watt-hour payment meters of accuracy classes 1 and 2 for direct connection, for the measurement of alternating current electrical energy consumption of a frequency in the range 45 Hz to 65 Hz that include a load switch for the purpose of interruption or restoration of the electricity supply to the load in accordance with the current value of the available credit maintained in the payment meter. It does not apply to static watt-hour payment meters where the voltage across the connection terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems). It applies to payment meters for indoor application only, where the payment meter shall be mounted as for normal service (i.e. together with a specified matching socket where applicable). Payment meters are implementations where all the main functional elements are incorporated in a single enclosure, together with any specified matching socket. There are also multi-part installations where the various main functional elements, such as the measuring element, the user interface unit, token carrier interface, and the load switch are implemented in more than one enclosure, involving additional interfaces. This part of IEC 62055 does not apply to multi- part payment metering installations. Functional requirements that apply to payment meters are also defined in this part of IEC 62055, and include informative basic functional requirements and tests for the prepayment mode of operation in Annex A. Allowances are made for the relatively wide range of features, options, alternatives, and implementations that may be found in practice. The diverse nature and functionality of payment meters prevent the comprehensive specification of detailed test methods for all of these requirements. However, in this case, the requirements are stated in such a way that tests can then be formulated to respect and validate the specific functionality of the payment meter being tested.
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62051:1999, Electricity metering – Glossary of terms. IEC 61358:1996, Acceptance inspection for direct-connected alternating current static watt- hour meters for active energy (classes 1 and 2) IEC 62052-11:2003, Electricity metering equipment (AC) – General requirements, tests and test conditions – Part 11: Metering equipment IEC 62053-21:2003, Electricity metering equipment (AC) – Particular requirements – Part 21: Static meters for active energy (classes 1 and 2) IEC 60050-300:2001, International Electrotechnical Vocabulary – Electrical and electronic measurements and measuring instruments – Part 311: General terms relating to measurements – Part 312: General terms relating to electrical measurements – Part 313: Types of electrical measuring instruments – Part 314: Specific terms according to the type of instrument IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement techniques – Surge immunity test IEC 61008-1:1996, Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) – Part 1: General rules Amendment 1 (2002) IEC 62055-21:2005, Electricity metering – Payment systems – Part 21: Framework for standardisation IEC 62054-21:2004, Electricity metering (a.c.) – Tariff and load control – Part 21: Particular requirements for time switches 3 Terms and definitions For the purposes of this part of IEC 62055, the terms and definitions given in IEC 60050-300, IEC 62051, IEC 62052-11, and IEC 62055-21, as well as the following, apply.
3.1.3 fault current current flowing at a given point of a network resulting from a fault at another point of this network [IEC 60050:1986 603-02-25] 3.1.4 load interface terminal(s) where the customer’s load circuit is connected to the payment meter, or to a specified matching socket, where applicable 3.1.5 multi-part installation payment metering installation where the functional elements comprising the measuring element(s); register(s), storage, and control; meter accounting process; user interface including any physical token carrier interface; any virtual token carrier interface; load switch(es); auxiliaries; plus supply interface and load interface are not arranged in the form of a payment meter, but instead are partitioned into two or more units that require appropriate mounting, connection, and commissioning [IEC 62051, 17.45, modified] 3.1.6 payment meter electricity meter with additional functionality that can be operated and controlled to allow the flow of energy according to agreed payment modes