EN 50470-4:2023
(Main)Electricity metering equipment - Part 4: Particular requirements - Static meters for DC active energy (class indexes A, B and C)
Electricity metering equipment - Part 4: Particular requirements - Static meters for DC active energy (class indexes A, B and C)
This document applies only to static watt-hour meters of accuracy classes A, B and C for the measurement of direct current electrical active energy in DC systems and it applies to their type tests. NOTE 1 For general requirements, such as construction, EMC, safety, dependability etc., see the relevant EN 62052 series or EN 62059 series. This document applies to electricity metering equipment designed to: - measure and control electrical energy on DC electrical networks with voltages up to 1 500 V; NOTE 2 Meters for unearthed DC supplies and meters for three-wire DC networks are within the scope of this document. - form a complete meter including the legally relevant display of measured values; NOTE 3 Electrical energy meters constructed from separate parts as described in WELMEC Guide 11.7:2017 are included. - operate with integrated or detached legally relevant displays; - optionally, provide additional functions other than those for measurement of electrical energy. They can be used for measuring DC electrical energy, amongst others, in the following application areas: - in EV (electrical vehicle) charging stations or in EV charging infrastructure (also called EVSE, electric vehicle supply equipment), if energy is measured on the DC side; - in solar PV (photovoltaic) systems where DC power generation is measured; - in low voltage DC networks for residential or commercial areas, if energy is measured on the DC side, including similar applications like information technology (IT) server farms or DC supply points for communication equipment; - in DC supply points for public transport networks (e.g. for trolleybuses); - in mobile applications on vehicles for e-road (electric road) systems. Meters designed for operation with external DC instrument transformers, transducers or shunts can be tested for compliance with this document only if such meters and their transformers, transducers or shunts are tested together and meet the requirements for directly connected meters. Requirements in this document and in EN IEC 62052 11:20211 applying to meters designed for operation with DC LPITs also apply to meters designed for operation with external instrument transformers, transducers or shunts. NOTE 4 Modern electricity meters typically contain additional functions such as measurement of voltage magnitude, current magnitude, power, etc.; measurement of power quality parameters; load control functions; delivery, time, test, accounting, recording functions; data communication interfaces and associated data security functions. The relevant standards for these functions could apply in addition to the requirements of this document. However, the requirements for such functions are outside the scope of this document. NOTE 5 Product requirements for power metering and monitoring devices (PMDs) and measurement functions such as voltage magnitude, current magnitude, power, etc., are covered in EN IEC 61557-12:2022. However, devices compliant with EN IEC 61557-12:2022 are not intended to be used as billing meters unless they are also compliant with EN IEC 62052 11:20211 and this document. NOTE 6 Requirements for DC power quality (PQ) instruments, DC PQ measuring techniques, and DC PQ instrument testing are under discussion and will be specified in other standards. This document does not apply to: — portable meters; NOTE 7 Portable meters are meters that are not permanently connected. — meters used in rolling stock (railway applications), ships and airplanes; NOTE 8 DC meters for rolling stock are covered by other standards, e.g. by the EN 50463 series. [...]
Elektrizitätszähler - Teil 4: Besondere Anforderungen - Elektronische Wirkverbrauchszähler für Gleichstrom der Genauigkeitsklassen A, B und C
Équipement de comptage de l'électricité - Partie 4: Exigences particulières - Compteurs statiques d'énergie active en courant continu (indices de classe A, B et C)
Le présent document s’applique uniquement aux compteurs statiques d’énergie active de classes de précision A, B et C, destinés à la mesure de l’énergie électrique active en courant continu sur les réseaux à tension continue, et à leurs essais de type. NOTE 1 Pour les exigences générales, notamment en matière de construction, de CEM, de sécurité, de sûreté de fonctionnement, etc., voir série EN 62052 ou série EN 62059 correspondante. Le présent document s’applique aux équipements de comptage de l’électricité conçus pour: — mesurer et piloter l’énergie électrique sur les réseaux électriques en courant continu à des tensions allant jusqu’à 1 500 V; NOTE 2 Les compteurs pour sources d’alimentation en courant continu non mises à la terre et les compteurs pour réseaux à trois fils en courant continu entrent dans le domaine d’application du présent document. — constituer un compteur complet, afficheur légalement pertinent des valeurs mesurées inclus; NOTE 3 Les compteurs d’énergie électrique constitués d’éléments séparés, décrits dans le Guide WELMEC 11.7:2017, sont inclus. — fonctionner avec des afficheurs intégrés ou séparés légalement pertinents; — assurer, en option, des fonctions autres que celles relatives au comptage de l’énergie électrique. Ils peuvent servir à mesurer l’énergie électrique en courant continu, entre autres, dans les domaines d’application suivants: — dans les bornes de charge en courant continu pour véhicules électriques (VE) ou dans les infrastructures de charge pour VE (également appelées système d’alimentation pour véhicules électriques, SAVE), si l’électricité est mesurée côté courant continu; — dans les systèmes photovoltaïques (PV) où la puissance générée en courant continu est mesurée; — dans les réseaux basse tension en courant continu des zones résidentielles ou commerciales, si l’énergie est mesurée côté courant continu, y compris les applications similaires telles que les parcs de serveurs des technologies de l’information (TI) ou les points d’alimentation en courant continu pour les équipements de communication; — dans les points d’alimentation en courant continu pour les réseaux de transport public (par exemple pour les trolleybus); — dans les applications mobiles sur les véhicules destinés aux systèmes "e-road" (route électrique). Les compteurs conçus pour être alimentés par des transformateurs, des transducteurs ou des shunts externes de mesure en courant continu peuvent uniquement être soumis à des essais de conformité au présent document si ces compteurs et leurs transformateurs, transducteurs ou shunts sont soumis à l’essai ensemble et satisfont aux exigences relatives aux compteurs à branchement direct. Les exigences énoncées dans le présent document et dans l’EN IEC 62052 11:20211, qui s’appliquent aux compteurs conçus pour fonctionner avec des transformateurs de mesure de faible puissance (LPIT, Low-Power Instrument Transformer) en courant continu, s’appliquent également aux compteurs conçus pour fonctionner avec des transformateurs, des transducteurs ou des shunts externes de mesure. [...]
Oprema za merjenje električne energije - 4. del: Posebne zahteve - Statični števci za aktivno enosmerno napetost (razred točnosti A, B, C)
Ta dokument se uporablja za statične števce delovne energije razredov natančnosti A, B in C za merjenje delovne električne energije pri enosmernem toku v enosmernih sistemih ter se uporablja le za tipsko preskušanje teh števcev.
OPOMBA 1: Splošne zahteve, na primer za izdelavo, elektromagnetno združljivost (EMC), varnost, zanesljivost itd. so podane v ustreznih skupinah standardov EN 62052 ali EN 62059.
Ta dokument se uporablja za opremo za merjenje električne energije, zasnovano:
– za merjenje in nadzor električne energije v enosmernih električnih omrežjih z napetostmi do 1500 V;
OPOMBA 2: Področje uporabe tega dokumenta zajema števce za neozemljeno enosmerno napajanje in števce za trivodna enosmerna omrežja.
– za tvorjenje celotnega števca, vključno z zakonsko ustreznim prikazom izmerjenih vrednosti;
OPOMBA 3: Vključeni so modularni števci, kot so opisani v vodilu WELMEC 11.7.
– za delovanje z integriranimi ali ločenimi zakonsko ustreznimi prikazovalniki;
– za izbirno zagotavljanje dodatnih funkcij poleg tistih, ki so namenjene merjenju električne energije.
Med drugim jih je mogoče uporabiti za merjenje enosmerne električne energije na naslednjih področjih uporabe:
– na postajah za polnjenje električnih vozil (EV) ali v infrastrukturi za polnjenje električnih vozil (imenovani tudi EVSE – napajalna oprema za električna vozila), če se energija meri na enosmerni strani;
– v solarnih fotonapetostnih (PV) sistemih, kjer se meri proizvodnja enosmerne energije;
– v nizkonapetostnih enosmernih omrežjih za stanovanjska ali poslovna območja, če se energija meri na enosmerni strani, vključno s podobnimi načini uporabe, kot so strežniške farme informacijske tehnologije (IT) ali enosmerne napajalne točke za komunikacijsko opremo;
– v enosmernih napajalnih točkah za omrežja javnega prevoza (npr. trolejbuse);
– v mobilnih aplikacijah v vozilih za sisteme e-cest (električne cestne sisteme).
Števce, zasnovane za delovanje z zunanjimi enosmernimi instrumentnimi transformatorji ali pretvorniki, je mogoče preskusiti glede skladnosti s tem dokumentom le, če se taki števci in njihovi transformatorji ali pretvorniki preskusijo skupaj ter izpolnjujejo zahteve za neposredno povezane števce. Zahteve v tem dokumentu in v standardu EN IEC 62052-11:2021/A11:2022, ki se uporabljajo za števce, zasnovane za delovanje z enosmernimi instrumentnimi transformatorji majhne moči (LPIT), se uporabljajo tudi za števce, zasnovane za delovanje z zunanjimi instrumentnimi transformatorji ali pretvorniki.
OPOMBA 4: Sodobni števci električne energije običajno vsebujejo dodatne funkcije, kot so merjenje velikosti napetosti, velikosti toka, moči itd.; merjenje parametrov kakovosti električne energije; funkcije krmiljenja obremenitve; funkcije dobave, časa, preskušanja, vodenja evidence, beleženja; podatkovni komunikacijski vmesniki in povezane funkcije za varnost podatkov. Poleg zahtev iz tega dokumenta se lahko uporabljajo ustrezni standardi za te funkcije. Vendar zahteve za te funkcije ne spadajo na področje uporabe tega dokumenta.
OPOMBA 5: Zahteve glede izdelkov v zvezi z napravami za merjenje in nadzorovanje moči (PMD) ter merilne funkcije, kot so velikost napetosti, velikost toka, moč itd., so zajete v standardu EN IEC 61557-12:2022. Vendar naprave, ki so skladne s standardom EN IEC 61557-12:2022, niso namenjene uporabi kot števci za obračunavanje, razen če so skladne tudi s standardom EN IEC 62052-11:2021/A11:2022 in tem dokumentom.
OPOMBA 6: Zahteve za instrumente za kakovost enosmerne energije (PQ), merilne tehnike za kakovost enosmerne energije in preskušanje instrumentov za kakovost enosmerne energije so v obravnavi in bodo določene v drugih standardih.
[...]
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2023
Oprema za merjenje električne energije - 4. del: Posebne zahteve - Statični števci
za aktivno enosmerno napetost (razred točnosti A, B, C)
Electricity metering equipment - Part 4: Particular requirements - Static meters for DC
active energy (class indexes A, B, C)
Elektrizitätszähler - Teil 4: Besondere Anforderungen - Elektronische
Wirkverbrauchszähler für Gleichstrom der Genauigkeitsklassen A, B und C
Equipement de comptage d'électricité - Partie 4: Exigences particulières - Compteurs
statiques d'énergie active en courant continu (indices de classe A, B et C)
Ta slovenski standard je istoveten z: EN 50470-4:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50470-4
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2023
ICS 91.140.50
English Version
Electricity metering equipment - Part 4: Particular requirements -
Static meters for DC active energy (class indexes A, B and C)
Équipement de comptage de l'électricité - Partie 4: Elektrizitätszähler - Teil 4: Besondere Anforderungen -
Exigences particulières - Compteurs statiques d'énergie Elektronische Wirkverbrauchszähler für Gleichstrom der
active en courant continu (indices de classe A, B et C) Genauigkeitsklassen A, B und C
This European Standard was approved by CENELEC on 2023-07-24. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50470-4:2023 E
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 7
4 Standard electrical values . 9
4.1 Voltages . 9
4.2 Currents . 9
4.2.1 General . 9
4.2.2 Nominal current . 10
4.2.3 Starting current . 10
4.2.4 Minimum current . 10
4.2.5 Maximum current . 10
4.3 Power consumption . 10
4.4 MMQ . 11
4.5 Integration (averaging) time . 11
5 Construction requirements . 11
5.1 General . 11
5.2 Meters with reduced overvoltage category (OVC) or reduced measurement category (CAT) . 12
6 Meter marking and documentation . 12
6.1 General . 12
6.2 MMQ . 12
7 Accuracy requirements . 12
7.1 General test conditions . 12
7.2 Methods of accuracy verification . 13
7.3 Measurement uncertainty . 13
7.4 Meter constant . 13
7.5 Initial start-up of the meter . 13
7.6 Test of no-load condition . 13
7.7 Starting current test . 13
7.8 Repeatability test . 13
7.9 Allowable errors due to variation of the current . 13
7.10 Allowable errors due to influence quantities and disturbances . 14
7.11 Time-keeping accuracy . 17
7.12 Accuracy tests at reference conditions and when affected by influence quantities . 17
7.13 Error of measurement . 17
7.14 Error of measurement for small amounts of energy . 18
8 Climatic conditions . 18
8.1 General . 18
8.2 Test of the effect of the climatic environments . 19
8.3 Meters specified for temperature ranges exceeding those of Table 14 . 19
9 The effects of external influences . 19
9.1 General . 19
9.2 Conducted differential mode current disturbances for DC meters . 19
9.3 Voltage unbalance . 20
10 Requirements concerning the software and protection against corruption . 20
10.1 General . 20
10.2 Identification of functions implemented in software . 21
10.3 Identification and protection of software . 21
10.4 Identification and protection of metrologically relevant parameters . 21
10.5 Setting of parameters. 21
10.6 Protection of measurement data . 22
10.7 Protection against influence by metrologically non-relevant software . 22
10.8 Protection against influence by connecting another device . 22
10.9 Meters intended for transmission of transaction data . 22
11 Type test . 22
12 Durability . 22
13 Reliability . 23
Annex A (informative) Calculation of the error of measurement . 24
Annex B (informative) Differential mode current disturbance test . 25
Annex C (informative) Differences between IEC and Directive 2014/32/EU . 26
Annex D (informative) Accuracy classes and class indexes . 28
D.1 General . 28
D.2 Class indexes . 28
Annex ZZ (informative) Relationship between this European standard and the essential requirements
of Directive 2014/32/EU aimed to be covered . 29
Bibliography . 32
European foreword
This document (EN 50470-4:2023) has been prepared by CLC/TC 13 “Electrical energy measurement and
control”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024-07-24
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-07-24
conflicting with this document have to be
withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is used in conjunction with EN IEC 62052-11:2021 .
This document is related to EN IEC 62053-41:2021 , Electricity metering equipment - Particular requirements -
Part 41: Static meters for DC energy (classes 0,5 and 1).
NOTE Terms differences for accuracy classes in related standard (EN IEC 62053-41:2021 ) and Directive 2014/32/EU
are listed in Annex D.
The structure of the standards is similar; modifications in this document are provided in the perspective of
compliance with the Essential Requirements of Directive 2014/32/EU on Measuring Instruments (MID).
This document has been prepared under a standardization request addressed to CENELEC by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZZ, which is an integral part of this document.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.
...
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