CLC/TR 50579:2012

Electricity metering equipment (a.c.) - Severity levels, immunity requirements and test methods for conducted disturbances in the frequency range 2 kHz - 150 kHz

This European Technical Report 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 immunity test for direct connected and transformer connected electricity meters as an extension for EN 50470-1 and EN 50470-3. The tests are designed to achieve immunity against disturbing currents of up to 2 A (2 kHz-30 kHz) and up to 1 A (30 KHz-150 kHz) for direct connected meters and 2 % Imax (2 kHz-30 kHz) and 1 % Imax (30 KHz-150 kHz) for transformer connected meters. 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. 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 Technical Report applies only for the active energy metering part. This Technical Report distinguishes between: – meters of class indexes A, B and C; – direct connected and transformer operated meters; 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.

Wechselstrom-Elektrizitätszähler - Prüfschärfe, Störfestigkeit und Prüfverfahren für leitungsgeführte Störgrößen im Frequenzbereich von 2 kHz bis 150 kHz

Equipement de comptage d'électricité (c.a.) – Niveaux de sévérité, prescriptions d’immunité et méthodes d’essai pour les perturbations conduites dans le domaine de fréquence de 2 kHz à 150 kHz

Oprema za merjenje električne energije - Težavnostni nivoji, zahteve za odpornost in preskusne metode za motnje po vodnikih v frekvenčnem območju 2-150 kHz

To evropsko tehnično poročilo se uporablja za nove statične števce električne energije z razrednimi indeksi A, B in C, ki so namenjeni za uporabo v stanovanjskih, poslovnih in manj zahtevnih industrijskih okoljih, za merjenje električne delovne energije izmeničnega toka v omrežjih na 50 Hz. Določa posebne zahteve in preskus odpornosti za števce električne energije za direktno priključitev in priključitev prek transformatorja kot razširitev standardov EN 50470-1 in EN 50470-3. Preskusi so zasnovani tako, da se doseže odpornost na moteče tokove do 2 A (2 kHz–30 kHz) in do 1 A (30 KHz–150 kHz) pri direktno priključenih števcih ter 2 % Imax (2 kHz–30 kHz) in 1 % Imax (30 KHz–150 kHz) pri števcih, priključenih prek transformatorja.

General Information

• Status: Published
• Publication Date: 28-Jun-2012
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Ref Project: SIST-TP CLC/TR 50579:2012 - Electricity metering equipment - Severity levels, immunity requirements and test methods for conducted disturbances in the frequency range 2 -150 kHz

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2012
2SUHPD]DPHUMHQMHHOHNWULþQHHQHUJLMH7HåDYQRVWQLQLYRML]DKWHYH]DRGSRUQRVW
LQSUHVNXVQHPHWRGH]DPRWQMHSRYRGQLNLKYIUHNYHQþQHPREPRþMXN+]
Electricity metering equipment - Severity levels, immunity requirements and test methods
for conducted disturbances in the frequency range 2 -150 kHz
Wechselstrom-Elektrizitätszähler - Prüfschärfe, Störfestigkeit und Prüfverfahren für
leitungsgeführte Störgrößen im Frequenzbereich von 2 kHz bis 150 kHz
Equipement de comptage d'électricité (c.a.) – Niveaux de sévérité, prescriptions
d’immunité et méthodes d’essai pour les perturbations conduites dans le domaine de
fréquence de 2 kHz à 150 kHz
Ta slovenski standard je istoveten z: CLC/TR 50579:2012
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CLC/TR 50579
RAPPORT TECHNIQUE
June 2012
TECHNISCHER BERICHT
ICS 91.140.50
English version
Electricity metering equipment (a.c.) -
Severity levels, immunity requirements and test methods for conducted
disturbances in the frequency range 2 kHz -
150 kHz
Equipement de comptage d'électricité Wechselstrom-Elektrizitätszähler -
(c.a.) – Niveaux de sévérité, prescriptions Prüfschärfe, Störfestigkeit und
d’immunité et méthodes d’essai pour les Prüfverfahren für leitungsgeführte
perturbations conduites dans le domaine Störgrößen im Frequenzbereich von 2 kHz
de fréquence de 2 kHz à 150 kHz bis 150 kHz

This Technical Report was approved by CENELEC on 2012-06-04.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50579:2012 E
Contents Page
Foreword . - 3 -
Introduction. - 4 -
1 Sc op e . - 5 -
2 Normative references . - 5 -
3 Terms and definitions . - 5 -
4 General . - 6 -
5 Test equipment . - 7 -
5.1 Test generator for the disturbing current . - 7 -
5.1.1 General . - 7 -
5.1.2 Example of a test generator for the disturbing current . - 7 -
5.2 Generator for 50 Hz current and voltage . - 8 -
5.2.1 General . - 8 -
5.2.2 Example for a testing circuit . - 9 -
6 Test sequence . - 9 -
7 Performance criteria  Performance criteria for electricity meter as described in
EN 50470-1 and EN 50470-3 . - 10 -
Annex A (informative)  Example for a realised test set-up  Setup schematic . - 11 -
Bibliography . - 12 -

- 3 - CLC/TR 50579:2012
Foreword
This document (CLC/TR 50579:2012) has been prepared by CLC/TC 13 "Equipment for electrical
energy measurement and load control".
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Introduction
This Technical Report specifies immunity levels and standard testing procedure for the immunity
against symmetric currents in the frequency range from 2 kHz to 150 kHz as an extension of the
harmonised standards EN 50470-1 and EN 50470-3 until the basic standards IEC 61000-x-x are in
force.
This Technical Report was requested by various approval bodies and utilities as a temporary solution,
since accuracy problems with electricity meters were observed in presence of disturbing currents in
the frequency range from 2 kHz to 150 kHz. Up to date no standards are available for this frequency
range.
The testing against symmetrical currents is not yet a part of the actual basic standards or product
standards in EMC. However for some electricity meters an influence of symmetric currents has been
shown in various investigations. The source of these currents in a frequency range from 2 kHz to
150 kHz can be a photovoltaic inverter or other switched mode power supplies.

- 5 - CLC/TR 50579:2012
1 Scope
This European Technical Report 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
immunity test for direct connected and transformer connected electricity meters as an extension for
EN 50470-1 and EN 50470-3. The tests are designed to achieve immunity against disturbing currents
of up to 2 A (2 kHz-30 kHz) and up to 1 A (30 KHz-150 kHz) for direct connected meters and 2 % Imax
(2 kHz-30 kHz) and 1 % Imax (30 KHz-150 kHz) for transformer connected meters.
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.
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 Technical Report applies only for the active energy metering part.
This Technical Report distinguishes between:
– meters of class indexes A, B and C;
– direct connected and transformer operated meters;
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 50470-1, Electricity metering equipment (a.c.)  Part 1: General requirements, tests and test
conditions  Metering equipment (class indexes A, B and C)
EN 50470-3:2006, Electricity metering equipment (a.c.)  Part 3: Particular requirements  Static
meters for active energy (class indexes A, B and C)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
equipment under test
(EUT)
electricity meter or other instrumentation for the measurement of energy which is tested against the
disturbing current described in this Technical Report

3.2
load current
I
50Hz
50 Hz current flowing through the current path of the equipment under test. Typically the current is
flowing through the live wires LIN to LOUT of the electricity meter
3.3
disturbi
...