MEE - Equipment for electrical energy measurement and load control

IEC 62052-11:2020 (E) specifies requirements and associated tests, with their appropriate conditions for type testing of AC and DC electricity meters. This document details functional, mechanical, electrical and marking requirements, test methods, and test conditions, including immunity to external influences covering electromagnetic and climatic environments.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC, or 1 500 V DC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated displays (electromechanical or static meters);
• operate with detached indicating displays, or without an indicating display (static meters only);
• be installed in a specified matching sockets or racks;
• optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with Low Power Instrument Transformers (LPITs as defined in the IEC 61869 series) may be tested for compliance with this document and the relevant IEC 62053 series documents only if such meters and their LPITs are tested together as directly connected meters.
This document is also applicable to auxiliary input and output circuits, operation indicators, and test outputs of equipment for electrical energy measurement.
This document also covers the common aspects of accuracy testing such as reference conditions, repeatability and measurement of uncertainty.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC, or 1 500 V DC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series of standards) when tested without such transformers;
• metering systems comprising multiple devices (except of LPITs) physically remote from one another;
• portable meters;
• 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).
This second edition cancels and replaces the first edition published in 2003, and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31:2015;
b) Included requirements for meter power consumption and voltage requirements from IEC 62053-61; IEC 62053-61 is withdrawn;
c) Included requirements for meter symbols from IEC 62053-52; IEC 62053-52 is withdrawn;
d) Included requirements for meter pulse output devices from IEC 62053-31; IEC 62053-31 is withdrawn;
e) Added new requirements and tests including: meters with detached indicating displays, and meters without indicating displays, meter sealing provisions; measurement uncertainty and repeatability; time-keeping accuracy; type tes

IEC 62053-21:2020 applies only to static watt-hour meters of accuracy classes 0,5, 1 and 2 for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the IEC 61869 series) may be tested for compliance with this document only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices (except LPITs) physically remote from one another;
• portable meters;
• 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).
This second edition cancels and replaces the first edition published in 2003 and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31: 2015.
b) Replaced Ib with In; Ib is no longer used when referencing directly connected meters.
c) Moved the descriptions of all general requirements and test methods from IEC 62053-21: 2003, IEC 62053-22: 2003, IEC 62053-23: 2003, IEC 62053-24: 2003 to IEC 62052-11:2020; IEC 62053-21:2020, IEC 62053-22:2020, IEC 62053-23:2020, IEC 62053-24:2020 contain only accuracy class specific requirements.
d) Added new requirements and tests concerning:
1) measurement uncertainty and repeatability (7.3, 7.8);
2) influence of fast load current variations (9.4.12);
3) immunity to conducted differential current disturbances in the 2 kHz to 150 kHz frequency range (9.3.8).
e) Meters designed for operation with low power instrument transformers (LPITs) may be tested for compliance with this document as directly connected meters.

IEC 62053-23:2020 applies only to static var-hour meters of accuracy classes 2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
For practical reasons, this document is based on a conventional definition of reactive energy for sinusoidal currents and voltages containing the fundamental frequency only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the IEC 61869 series) may be considered as compliant with this document only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices (except LPITs) physically remote from one another;
• portable meters;
• 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).
This second edition cancels and replaces the first edition published in 2003 and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31:2015.
b) Replaced Ib with In; Ib is no longer used when referencing directly connected meters.
c) Moved the descriptions of all general requirements and test methods from IEC 62053-21: 2003, IEC 62053-22: 2003, IEC 62053-23: 2003, IEC 62053-24: 2003 to IEC 62052-11:2020; IEC 62053-21:2020, IEC 62053-22:2020, IEC 62053-23:2020, IEC 62053-24:2020 contain only accuracy class specific requirements.
d) Added new requirements and tests concerning:
1) measurement uncertainty and repeatability (7.3, 7.8);
2) influence of fast load current variations (9.4.12);
3) immunity to conducted differential current disturbances in the 2 kHz to 150 kHz frequency range (9.3.8).
e) Meters designed for operation with low power instrument transformers (LPITs) may be tested for compliance with this document as directly connected meters.
The reactive energy accuracy classes 2 and 3 defined in IEC 62053-23 have also been added to IEC 62053-24. The TC13

IEC 62053-24:2020 applies only to static var-hour meters of accuracy classes 0,5S, 1S, 1, 2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
This document uses a conventional definition of reactive energy where the reactive power and energy is calculated from the fundamental frequency components of the currents and voltages only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the IEC 61869 series) may be considered as compliant with this document only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices (except LPITs) physically remote from one another;
• portable meters;
• 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).
This second edition cancels and replaces the first edition published in 2014 and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition: see Annex E

IEC 62053-22:2020 applies only to transformer operated static watt-hour meters of accuracy classes 0,1 S, 0,2 S and 0,5 S for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices physically remote from one another.
• portable meters;
• 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)
This second edition cancels and replaces the first edition published in 2003 and its amendment 1: 2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31: 2015.
b) Moved the descriptions of all general requirements and test methods from IEC 62053-21: 2003, IEC 62053-22: 2003, IEC 62053-23: 2003, IEC 62053-24: 2003 to IEC 62052-11:2020; IEC 62053-21:2020, IEC 62053-22:2020, IEC 62053-23:2020, IEC 62053-24:2020 contain only accuracy class specific requirements.
c) Added new requirements and tests concerning:
1) active energy meters of accuracy class 0,1S;
2) measurement uncertainty and repeatability (7.3, 7.8);
3) influence of fast load current variations (9.4.12);
4) immunity to conducted differential current disturbances in the 2 kHz to 150 kHz frequency range (9.3.8)

This part of IEC 62056 describes how the DLMS/COSEM Application layer and the COSEM
object model as specified in IEC 62056‑5‑3:2017, IEC 62056‑6‑1:2017 and IEC 62056‑6‑2:2017
can be used over the lower layers specified in the IEC 14908 series, forming a DLMS/COSEM
ISO/IEC 14908 communication profile.
This document is part of the IEC 62056 series. Its structure follows IEC 62056-1-0 and
IEC TS 62056-1-1.
Annex A (informative) provides examples of representative instances of data exchange.
NOTE This Annex A is included and referenced for consistency with other parts of the IEC 62056 suite, but it is
empty.
Annex B (normative) defines COSEM interface classes and related OBIS codes for setting up
and managing the DLMS/COSEM communication profile for IEC 14908 networks. These
interface classes and OBIS codes will be moved later to IEC 62056-6-2 and IEC 62056-6-1.
Annex C (informative) provides an implementation guide and specifies a migration path from
Utility Tables based applications to DLMS/COSEM based applications.
Annex D (informative) specifies the OSGP-AES-128-PSK security suite for optional use on the
adaptation layer level.
Annex E (normative) specifies the repeating mechanism over the ISO 14908-3 Power Line
Channel network.
Annex F (informative) specifies ISO/IEC 14908-3 Registration and monitoring of LNAPs.

This document describes the data interface model, application-level communication, management functionalities, and security mechanism for the exchange of data with smart-grid devices. The following five areas are referred to as the Open Smart Grid Protocol (OSGP).
• Data exchange with smart-grid devices allows Utility Suppliers to collect customer usage information such as billing data and load profiles, monitor and control grid utilization, provision scheduling of tariffs, detect theft and tampers, and to issue disconnects, to name a few. Meter features are described in Clauses 7 and 8.
• The OSGP data interface uses a representation-oriented model (tables and procedures) which require low overhead. The model is described in Clause 5, with specific tables specified in Annex A, Annex B, and procedures in Annex C and Annex D.
• The OSGP application protocol is designed to use the EN 14908-1:2014 communication stack over narrowband power line channels. Clause 9 describes the messages that are used to access OSGP data. An essential feature of the protocol over power line channels is a repeating mechanism which gives the application layer the control and responsibility for forwarding packets among devices, independent of the routing protocol or limitations of underlying layers. Therefore OSGP can be adapted to other communication stacks and medium, although such adaptation is outside of the scope of this specification. The repeating mechanism is described in Annex G.
• OSGP management features include the discovery of devices and the routing topology in a protocol called Automated Topology Management (described in Clause 4) commissioning of devices for secured communication (Annex F), monitoring of device connectivity, and updating of device firmware.
• OSGP security covers authentication, encryption, and key management. This is detailed in Annex F.

This part of IEC 62056 specifies DLMS/COSEM communication profiles for narrow-band
OFDM power line carrier PRIME neighbourhood networks using the modulation as specified in
Recommendation ITU-T G.9904:2012.
Three communication profiles are specified:
• a profile using the IEC 61334-4-32 LLC layer;
• a profile using TCP-UDP/IPv4;
• a profile using TCP-UDP/IPv6.

2020-02-07: EC rejected for citation EMC
2018-09-12: positive assessments for MID and EMC.

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This part of IEC 62056 specifies a model of a meter as it is seen through its communication
interface(s). Generic building blocks are defined using object-oriented methods, in the form of
interface classes to model meters from simple up to very complex functionality.
Annexes A to F (informative) provide additional information related to some interface classes.

IEC - Corrected version

This part of IEC 62056 specifies the overall structure of the OBject Identification System
(OBIS) and the mapping of all commonly used data items in metering equipment to their
identification codes.
OBIS provides a unique identifier for all data within the metering equipment, including not only
measurement values, but also abstract values used for configuration or obtaining information
about the behaviour of the metering equipment. The ID codes defined in this document are
used for the identification of:
• logical names of the various instances of the ICs, or objects, as defined in IEC 62056-6-2;
• data transmitted through communication lines;
• data displayed on the metering equipment, see Clause A.2.
This document applies to all types of metering equipment, such as fully integrated meters,
modular meters, tariff attachments, data concentrators, etc.
To cover metering equipment measuring energy types other than electricity, combined
metering equipment measuring more than one type of energy or metering equipment with
several physical measurement channels, the concepts of medium and channels are
introduced. This allows meter data originating from different sources to be identified. While
this document fully defines the structure of the identification system for other media, the
mapping of non-electrical energy related data items to ID codes is completed separately.
NOTE EN 13757-1:2014 defines identifiers for metering equipment other than electricity: heat cost allocators,
thermal energy, gas, cold water and hot water.

This part of IEC 62056 specifies the DLMS/COSEM application layer in terms of structure,
services and protocols for DLMS/COSEM clients and servers, and defines rules to specify the
DLMS/COSEM communication profiles.
It defines services for establishing and releasing application associations, and data
communication services for accessing the methods and attributes of COSEM interface
objects, defined in IEC 62056-6-2 using either logical name (LN) or short name (SN)
referencing.
Annex A (normative) defines how to use the COSEM application layer in various
communication profiles. It specifies how various communication profiles can be constructed
for exchanging data with metering equipment using the COSEM interface model, and what are
the necessary elements to specify in each communication profile. The actual, media-specific
communication profiles are specified in separate parts of the IEC 62056 series.
Annex B (normative) specifies the SMS short wrapper.
Annex C (normative) specifies the gateway protocol.
Annex D, Annex E and Annex F (informative) include encoding examples for APDUs.
Annex G (normative) provides NSA Suite B elliptic curves and domain parameters.
Annex H (informative) provides an example of an End entity signature certificate using P-256
signed with P-256.
Annex I (normative) specifies the use of key agreement schemes in DLMS/COSEM.
Annex J (informative) provides examples of exchanging protected xDLMS APDUs between a
third party and a server.
Annex K (informative) lists the main technical changes in this edition of the standard.

This part of IEC 62056 specifies the IEC 62056 DLMS/COSEM communication profile for
metering purposes based on the Recommendations ITU-T G.9901: Narrowband orthogonal
frequency division multiplexing power line communication transceivers – Power spectral
density specification and ITU-T G.9903:2014, Narrowband orthogonal frequency division
multiplexing power line communication transceivers for G3-PLC networks, an Orthogonal
Frequency Division Multiplexing (OFDM) Power Line Communications (PLC) protocol.
The physical layer provides a modulation technique that efficiently utilizes the allowed
bandwidth within the CENELEC A (3 kHz – 95 kHz), CENELEC B (95 kHz – 125 kHz), ARIB
(10 kHz – 450 kHz) and FCC (no specific frequency band limitations) bands, thereby allowing
the use of advanced channel coding techniques. This enables a robust communication in the
presence of narrowband interference, impulsive noise, and frequency selective attenuation.
The medium access control (MAC) layer allows the transmission of MAC frames through the
use of the power line physical channel. It provides data services, frame validation control,
node association and secure services.
The 6LoWPAN adaptation sublayer enables an efficient interaction between the MAC and the
IPv6 network layer. The use of the IPv6 network protocol – the latest generation of IP
protocols – opens a wide range of potential applications and services for metering purposes
(but the applications are not limited to metering).
The transport layer, the application layer and the data model are as specified in the
IEC 62056 DLMS/COSEM suite.
The scope of this communication profile standard is restricted to aspects concerning the use
of communication protocols in conjunction with the COSEM data model and the
DLMS/COSEM application layer. Data structures specific to a communication protocol are out
of the scope of this communication profile standard.
NOTE They are specified in the specific protocol standards.
Any project specific definitions of data structures and data contents may be provided in
project specific companion specifications.

This part of IEC 62056 specifies the DLMS/COSEM communication profile for ISO/IEC
12139-1 High speed PLC (HS-PLC) neighbourhood networks.
It uses the standard ISO/IEC 12139-1 established by ISO/IEC JTC1 SC06.

This International Standard specifies DLMS/COSEM wired and wireless M-Bus communication
profiles for local and neighbourhood networks.
Setting up and managing the M-Bus communication channels of M-Bus devices, the M-Bus
network, registering slave devices and – when required – repeaters is out of the scope of this
International Standard.
The scope of this communication profile standard is restricted to aspects concerning the use
of communication protocols in conjunction with the COSEM data model and the
DLMS/COSEM application layer. Data structures specific to a communication protocol are out
of the scope of this standard. Any project-specific definitions of data structures and data
contents may be provided in project-specific companion specifications.
Annex A (informative) provides information on M-Bus frame structures, addressing schemes
and an encoding example.
Annex B (normative) points to COSEM interface classes to set up and manage the wired and
wireless M-Bus communication channel.
Annex C (informative) provides MSCs for representative instances of communication.

Specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment

IEC 62053-24:2014 applies only to newly manufactured transformer operated static var-hour meters of accuracy classes 0,5 S, and 1 S as well as direct connected static var-hour meters of accuracy class 1, for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It uses a conventional definition of reactive energy where the reactive power and energy is calculated from the fundamental frequency components of the currents and voltages only.

Applies only to newly manufactured static var-hour meters of accuracy classes 2 and 3, for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only. For practical reasons, this standard is based on a conventional definition of reactive energy for sinusoidal currents and voltages containing the fundamental frequency only.

Specifies particular requirements for the type test of newly manufactured indoor electronic ripple control receivers for the reception and interpretation of pulses of a single audio frequency superimposed on the voltage of the electricity distribution network and for the execution of the corresponding switching operations. In this system the mains frequency is generally used to synchronize the transmitter and receivers. Neither the control frequency nor the encoding are standardized in this standard.

Covers type tests for electricity metering equipment for indoor and outdoor application and to newly manufactured equipment designed to measure the electric energy on 50 Hz or 60 Hz networks, with a voltage up to 600 V. It applies to electromechanical or static 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)

Applies only to newly manufactured static watt-hour meters of accuracy classes 0,2 S and 0,5 S, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only.

Specifies general requirements for the type test of newly manufactured indoor tariff and load control equipment, like electronic ripple control receivers and time switches that are used to control electrical loads, multi-tariff registers and maximum demand indicator devices.

Applies only to newly manufactured electromechanical watt-hour meters of accuracy classes 0,5, 1 and 2, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It applies only to electromechanical 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).

Applies only to newly manufactured static watt-hour meters of accuracy classes 1 and 2, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It applies only to static watt-hour meters for indoor and outdoor application consisting of a measuring element and register(s) enclosed together in a meter case.

This part of IEC 62056 specifies the DLMS/COSEM application layer in terms of structure,
services and protocols for COSEM clients and servers, and defines how to use the
DLMS/COSEM application layer in various communication profiles.
It defines services for establishing and releasing application associations, and data
communication services for accessing the methods and attributes of COSEM interface
objects, defined in IEC 62056-6-2:2016, using either logical name (LN) or short name (SN)
referencing.
Annex A (normative) defines how to use the COSEM application layer in various
communication profiles. It specifies how various communication profiles can be constructed
for exchanging data with metering equipment using the COSEM interface model, and what are
the necessary elements to specify in each communication profile. The actual, media-specific
communication profiles are specified in separate parts of the IEC 62056 series.
Annex B (normative) specifies the SMS short wrapper.
Annex C, Annex D and Annex E (informative) include encoding examples for APDUs.
Annex F (informative) provides an overview of cryptography.
Annex G (informative) lists the main technical changes in this edition of the standard.

IEC 62056-7-5:2016 specifies DLMS/COSEM communication profiles for transmitting metering data modelled by COSEM interface objects through a Local Data Transmission Interface (LDTI). The LDTI may be part of a meter or of a Local Network Access Point (LNAP) hosting a DLMS/COSEM server.

This part of IEC 62056 specifies a connection-less and a connection oriented transport layer
(TL) for DLMS/COSEM communication profiles used on IP networks.
These TLs provide OSI-style services to the service user DLMS/COSEM AL. The connectionless
TL is based on the Internet Standard User Datagram Protocol (UDP). The connectionoriented
TL is based on the Internet Standard Transmission Control Protocol (TCP).
The DLMS/COSEM TL consists of the UDP or TCP transport layer TCP and an additional
sublayer, called wrapper.
Annex A shows how the OSI-style TL services can be converted to and from UDP and TCP
function calls.

This part of IEC 62056 specifies a model of a meter as it is seen through its communication
interface(s). Generic building blocks are defined using object-oriented methods, in the form of
interface classes to model meters from simple up to very complex functionality.
Annexes A to F (informative) provide additional information related to some interface classes.

This part of IEC 62052 specifies product safety requirements for equipment for electrical
energy measurement and control.
NOTE 1 For other requirements, see the relevant standards.
This International Standard applies to newly manufactured metering equipment designed to
measure and control electrical energy on 50 Hz or 60 Hz networks with a voltage up to 600 V,
where all functional elements, including add-on modules are enclosed in or form a single
case.
NOTE 2 The voltage mentioned above is the voltage line-to-neutral derived from nominal voltages. See Table 7.
This International Standard also applies to metering equipment containing supply and load
control switches, but only those which are electromechanical in operation.
NOTE 3 For components and sub-assemblies, see Clause 13.
When such equipment is designed to be installed in a specified matching socket, then the
requirements apply to, and the tests shall be performed on, equipment installed in its
specified matching socket. However, requirements for sockets and inserting / removing the
meters from the socket are outside the scope of this standard.
This International Standard is also applicable to auxiliary input and output circuits.
NOTE 4 Examples are impulse inputs and outputs, control inputs and outputs, circuits for meter data exchange.
In this standard distinction is made between:
• electromechanical meters, static meters and equipment for tariff and load control;
• direct connected, current transformer operated, voltage and current transformer operated
meters;
• protective class I and protective class II equipment;
• wall or cabinet mounted, rack mounted and panel mounted equipment;
• equipment intended for indoor use and outdoor use.
Equipment used in conjunction with equipment for electrical energy measurement and control
may need to comply with additional safety requirements. See also Clause 13.
NOTE 5 Examples are telecommunication modems and customer information units.
This International Standard does not apply to:
• equipment where the voltage line-to-neutral derived from nominal voltages exceeds 600 V;
• portable meters;
NOTE 6 Portable meters are meters that are not permanently connected.
laboratory and mobile meter test equipment;
• reference standard meters.
The safety requirements of this standard are based on the following assumptions:
• metering equipment has been installed correctly;
• metering equipment is used generally by unskilled persons, including meter readers and
consumers of electrical energy. In many cases, it is installed in a way that it is freely
accessible. Its terminal covers cannot be removed and its case cannot be opened without
removing seals and using a tool;
• during normal use all terminal covers, covers and barriers providing protection against
accessing hazardous live parts are in place;
• for installation, configuration, maintenance and repair it may be necessary to remove
terminal cover(s), (a part of) the case or barriers so that hazardous live parts may become
accessible. Such activities are performed by skilled personnel, who have been suitably
trained to be aware of working procedures necessary to ensure safety. Therefore, safety
requirements covering these conditions are out of the Scope of this standard.

This part of IEC 62056 provides information on the smart metering use cases and on
architectures supported by the IEC 62056 DLMS/COSEM series of standards specifying
electricity meter data exchange. It describes the standardization framework including:
• the principles on which the standards shall be developed;
• the ways the existing standards shall be extended to support new use cases and to
accommodate new communication technologies, while maintaining coherency;
• the aspects of interoperability and information security.
It also provides guidance for selecting the suitable standards for a specific interface within the
smart metering system.
Other aspects of metering covered by TC13, like metrological requirements, testing, safety
and dependability are out of the scope of this Standard.

This Technical Specification specifies the physical layer, medium access control layer and logical link control layer for communication on an electrical distribution network between a master node and one or more slave nodes using adaptive multi-carrier spread spectrum (AMC SS) technique. The adaptive cellular communication network technology provided in this specification may be used for automated meter reading as well as for other distribution network applications.

This Technical Specification contains 4 profile specifications:
•   the DLMS/COSEM SMITP B-PSK PLC Profile (clause 4)
•   the Original-SMITP B-PSK PLC Profile (clause 5)
•   the Original-SMITP IP Profile (clause 6)
•   the Original-SMITP Local data exchange profile (clause 7)
The DLMS/COSEM SMITP B-PSK profile defines the use of the CLC/FprTS 50568-4 communication protocol and methods to access and exchange data modelled by the COSEM objects of EN 62056 6 2 via the EN 62056-5-3 application layer. This section forms part of the DLMS/COSEM suite as described in FprEN 62056-1-0.
NOTE   In the following, the expression Original-SMITP refers to the open protocol originally developed and maintained by the Meters and More Open Technologies association (see Foreword).
The Original-SMITP Profiles define the access and exchange of data modelled by the Original-SMITP data model (clause 9) using the Original-SMITP application services (Clause 8).
The “Original-SMITP” specifications refer to smart metering system specifications defined prior to the availability of the DLMS/COSEM SMITP B-PSK PLC Profile. The “Original-SMITP” specifications do not form part of the DLMS/COSEM suite of EN 62056.

This Technical Specification is part of the EN 62056 / 52056 DLMS/COSEM suite and specifies the DLMS/COSEM communication profile for compatibly extendable power line carrier neighbourhood networks using Adaptive Multi-Carrier Spread-Spectrum (AMC-SS).
The physical layer provides a modulation technique that efficiently utilizes the allowed bandwidth within the CENELEC A band (3 kHz – 95 kHz), offering a very robust communication in the presence of narrowband interference, impulsive noise, and frequency selective attenuation. The physical layer of AMC-SS is defined in Clause 5 of CLC/FprTS 50590:2014.
The data link (DL) layer consists of three parts, the ‘Medium Access Control’ (MAC) sub-layer, the Logical Link Control (LLC) sub-layer and the ‘Convergence’ sub-layer. The data link layer allows the transmission of data frames through the use of the power line physical channel. It provides data services, frame integrity control, routing, registration, multiple access, and cell change functionality. The MAC sub-layer and the LLC sub-layer of AMC-SS are defined in Clause 6 of CLC/FprTS 50590:2014. The Convergence sub-layer is defined in this document.
The transport layer, the application layer and the data model are as specified in the EN 62056 DLMS/COSEM suite.

This Technical Specification specifies the characteristics of the profile related to Physical and Data Link Layers for communications on LV distribution network between a Concentrator (master node) and one or more slave nodes.
The following prescriptions are applied to groups of devices that communicate using low voltage network. Each section of the network is composed by one Concentrator (acting as the master of the section), and one or more primary nodes (A-Nodes). Every A-Node can optionally be associated to one secondary node (B-Node).

This Technical Specification is part of the EN 62056 / 52056 DLMS/COSEM suite and it specifies the DLMS/COSEM communication profiles for power line carrier neighbourhood networks using the modulation specified in ITU-T G.9904:2012.
There are three profiles specified:
- a profile using the EN 61334-4-32:1996 LLC layer;
- a profile using TCP-UDP/IPv4;
- a profile using TCP-UDP/IPv6.

This part of IEC 62053 applies only to newly manufactured transformer operated static varhour
meters of accuracy classes 0,5 S, and 1 S as well as direct connected static var-hour
meters of accuracy class 1, for the measurement of alternating current electrical reactive
energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
This standard uses a conventional definition of reactive energy where the reactive power and
energy is calculated from the fundamental frequency components of the currents and voltages
only. See Clause 3.
NOTE 1 This differs from the approach of IEC 62053-23, where reactive power and energy is defined only for
sinusoidal signals. In this standard reactive power and energy is defined for all periodic signals. Reactive power
and energy is defined in this way to achieve proper reproducibility of measurements with meters of different
designs. With this definition, reactive power and energy reflects the generally unnecessary current possible to
compensate with capacitors rather than the total unnecessary current.
It applies only to static var-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 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, then the relevant standards
for these elements also apply.
NOTE 2 IEC 61869-2:2012 describes transformers having a measuring range of 0,05 In to Imax for accuracy
classes 0,2, 0,5, 1 and 2, and transformers having a measuring range of 0,01 In to Imax for accuracy classes 0,2 S
and 0,5 S. As the measuring range of a meter and its associated transformers have to be matched and as only
transformers of classes 0,2 S / 0,5 S have the current error and phase displacement characteristics suitable to
operate a class 0,5 S / 1 S meter respectively as specified in this standard, the measuring range of the transformer
operated meters will be 0,01 In to Imax. Reactive meters intended to be used together with non-S transformers are,
therefore, not covered by this standard.

This part of IEC 62056 specifies the DLMS/COSEM communication profile for TCP-UDP/IP networks.

EN-IEC 62056 describes three profiles for local bus data exchange with stations either energized or not. For non-energized stations, the bus supplies energy for data exchange. Three different profiles are supported: - base profile: this three-layer profile provides remote communication services; NOTE This first profile has been published in IEC 61142:1993 and became known as the Euridis standard. - profile with DLMS: this profile allows using DLMS services as specified in IEC 61334-4-41; NOTE This second profile has been published in IEC 62056-31 Ed. 1.0:1999; - profile with DLMS/COSEM: this profile allows using the DLMS/COSEM Application layer and the COSEM object model as specified in IEC 62056-5-3 Ed. 1.0:- and in IEC 62056- 6-2 Ed. 1.0:- respectively. The three profiles use the same physical layer and they are fully compatible, meaning that devices implementing any of these profiles can be operated on the same bus. The transmission medium is twisted pair using carrier signalling and it is known as the Euridis Bus.