BS EN 50470-3:2006 – Electricity metering equipment (a.c.) — Part 3: Particular requirements — Static meters for active energy (class indexes A, B and C)
1 Scope
This European Standard applies to newly manufactured static watt-hour meters intended for residential, commercial and light industrial use, of class indexes A, B and C, for the measurement of alternating current electrical active energy in 50 Hz networks. It specifies particular requirements and type test methods.
It applies to static watt-hour meters for indoor and outdoor application, consisting of a measuring element and register(s) enclosed together in a meter case. It also applies to operation indicator(s) and test output(s).
If the meter has (a) measuring element(s) for more than one type of energy (multi-energy meters), or
when other functional elements, like maximum demand indicators, electronic tariff registers, time switches, ripple control receivers, data communication interfaces etc. are enclosed in the meter case (multi-function meters) then this standard applies only for the active energy metering part.
This standard distinguishes between:
– meters of class indexes A, B and C;
– direct connected and transformer operated meters;
– meters for use in networks equipped with or without earth fault neutralizers.
It does not apply to:
– watt-hour meters where the voltage across the connection terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems);
– portable meters;
– reference meters.
Methods for acceptance testing are covered by the IEC 62058 series of standards 1 ) .
The dependability aspect is covered by the documents of the IEC 62059 series.
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.
Publication Year Title
EN 50470-1 2006 Electricity metering equipment (a.c.) – Part 1: General requirements, tests and test conditions – Metering equipment (class indexes A, B and C)
EN 62059-41 2006 Electricity metering equipment – Dependability – Part 41: Reliability prediction (IEC 62059-41 :2006)
3 Terms, definitions and abbreviations
For the purposes of this document, the terms and definitions given in EN 50470-1 apply.
4 Standard electrical values
The values given in EN 50470-1 apply.
5 Mechanical requirements
The requirements given in EN 50470-1 apply.
6 Climatic conditions
The conditions given in EN 50470-1 apply.
7 Electrical requirements
In addition to the electrical requirements in EN 50470-1 , meters shall fulfil the following requirements.
7.1 Power consumption
7.1.1 Measurement method
The power consumption in the voltage and current circuits shall be determined at reference conditions given in 8.7.1 by any suitable method. The overall maximum error of the measurement of the power consumption shall not exceed 5 %.
7.1.2 Voltage circuits
The active and apparent power loss in each voltage circuit of a meter at reference voltage, reference temperature and reference frequency shall not exceed the values shown in Table 1 .
BS EN 50470-3:2006 – Electricity metering equipment (a.c.) — Part 3: Particular requirements — Static meters for active energy (class indexes A, B and C)