Revision of the existing EN 50522 to complement the EN 61936 with European earthing system design requirements

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1.1 General
(ncpt)   PL.1  Scope of application
This NNA applies to designing and constructing of new overhead lines with nominal system voltages exceeding 1 kV AC.
"New overhead line" means a totally new line between two points, A and B, built up with new components.
The standard PN-EN 50341-1 (Part 1) with this NNA does not apply to modernisation, reconstruction and renovation of the existing lines, unless otherwise specified in the Project Specification.
1.2 Field of application
(ncpt)   PL.1 All Dielectric Self Supporting (ADSS) cables
This NNA applies to All Dielectric Self Supporting (ADSS) cables only within the scope of their impact on the supports and minimum clearances which shall be taken as for insulated cable systems.
(ncpt)   PL.2 Telecommunication equipment
This NNA relates to the telecommunication equipment mounted on the new overhead line supports.

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This part of IEC 61970 belongs to the IEC 61970-450 to IEC 61970-499 series that, taken as a
whole, defines at an abstract level the content and exchange mechanisms used for data
transmitted between power system analyses applications, control centres and/or control centre
components.
The purpose of this document is to rigorously define the subset of classes, class attributes, and
roles from the CIM necessary to describe the result of state estimation, power flow and other
similar applications that produce a steady-state solution of a power network, under a set of use
cases which are included informatively in this document.
This document is intended for two distinct audiences, data producers and data recipients, and
can be read from those two perspectives. From the standpoint of model export software used
by a data producer, the document defines how a producer may describe an instance of a
network case in order to make it available to some other program. From the standpoint of a
consumer, the document defines what that importing software must be able to interpret in order
to consume power flow cases.
There are many different use cases for which use of this document is expected and they differ
in the way that the document will be applied in each case. Implementers are expected to
consider what use cases they wish to cover in order to know the extent of different options they
must cover. As an example, the profiles defined in this document will be used in some cases to
exchange starting conditions rather than solved conditions, so if this is an important use case,
it means that a consumer application needs to be able to handle an unsolved state as well as
one which has met some solution criteria

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IEC 61557-6:2019 is available as IEC 61557-6:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61557-6:2019 specifies the requirements applicable to measuring equipment for testing the effectiveness of protective measures of residual current devices (RCD) installed in TT, TN and IT systems. It is not the purpose of this document to verify the RCD according to their product standards. IEC 61557-6:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of requirements for testing a new type of RCD; b) addition of requirements for type B RCDs (former Annex B); c) addition of new Annex B on recommended tripping times; d) alignment of the structure with that of the whole IEC 61557 series.

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IEC TR 62543:2022 is available as IEC TR 62543:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC TR 62543:2022 gives general guidance on the subject of voltage sourced converters (VSC) used for transmission of power by high voltage direct current (HVDC). It describes converters that are not only voltage sourced (containing a capacitive energy storage medium and where the polarity of DC voltage remains fixed) but also self-commutated, using semiconductor devices which can both be turned on and turned off by control action. The scope includes 2‑level and 3-level converters with pulse-width modulation (PWM), along with multi-level converters, modular multi-level converters and cascaded two-level converters, but excludes 2‑level and 3-level converters operated without PWM, in square-wave output mode. HVDC power transmission using voltage sourced converters is known as "VSC transmission". The various types of circuit that can be used for VSC transmission are described in this document, along with their principal operational characteristics and typical applications. The overall aim is to provide a guide for purchasers to assist with the task of specifying a VSC transmission scheme. Line-commutated and current-sourced converters are specifically excluded from this document. This edition includes the following significant technical changes with respect to the previous edition:
- in Clause 3, some redundant definitions which were identical to those listed in IEC 62747 have been deleted;
- in 4.3.4, description and diagrams have been added for the cases of a bipole with dedicated metallic return and a rigid bipole;
- in 4.4, mention is made of the bi-mode insulated gate transistor (BiGT) and injection enhanced gate transistor (IEGT) as possible alternatives to the IGBT;
- in 5.6, the reference to common-mode blocking reactors has been deleted since these are very rarely used nowadays.

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IEC TR 63259:2022(E) provides guidelines for the application of water cooling systems for power electronics used in electrical transmission and distribution systems.
This document describes a kind of water cooling system, in which de-ionized water or de-ionized water mixed with other solutes is used as the heat transfer agent for the removal of heat from power electronic equipment. Water cooling system can be separated into main circuit, and control and protection system. Other cooling systems, in which de-ionized water is not the heat transfer agent, are excluded in this document.
This document provides guidance and supporting information for both purchaser(s) and potential supplier(s). It can be used as the basis for drafting a procurement specification and as a guide during project implementation.

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IEC 62641:2022 specifies the mechanical and electrical properties of round and formed wires for equivalent diameters up to the values according to Table 3 for aluminium and aluminium alloys and according to Table 4 for thermal resistant alloys. This document is applicable to aluminium and aluminium alloy wires for the manufacture of concentric lay overhead electrical stranded conductors with or without gap(s) for power transmission purposes.
The various materials and their designations are listed in Table 1. For calculation purposes, the values listed in Table 1 are used.
This first edition cancels and replaces the second edition of IEC 60104 published in 1987, the first edition of IEC 60121 published in 1960, the first edition of IEC 60889 published in 1987, and the first edition of IEC 62004 published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous editions of IEC 60104, IEC 60121, IEC 60889 and IEC 62004:  
designations of aluminium alloys are modified;
aluminium alloys A4, AL4 and AL5 are added;
wire diameter ranges for indicating mechanical properties are modified and extended;
test methods are merged.

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IEC 63248:2022 specifies the properties of wires in the diameter range of, but not limited to, 1,25 mm to 5,50 mm. This document is applicable to coated or cladded metallic wires before stranding used either as concentric lay overhead stranded conductors, or in the manufacture of cores for concentric lay overhead stranded conductors, for power transmission purposes.
The various wire types and their designations are listed in Table A.1. For calculation purposes the values listed in Annex B are used.
This first edition cancels and replaces the first edition of IEC 61232 published in 1993 and the first edition of IEC 60888 published in 1997. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous editions of IEC 61232 and IEC 60888:
a) wire designations have been modified and grouped;
b) wires with zinc coating class 2 were removed;
c) new wire designations have been added;
d) aluminium-clad FeNi36 wires have been added;
e) advanced zinc-aluminium alloy coated steel wires have been added.

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This part of IEC 61970-600 defines the profiles included in the Common Grid Model Exchange
Standard (CGMES) that are based on IEC 61970-450-series and IEC 61968-13 profiles. This
document refers to the IEC 61970-450-series and IEC 61968-13 profiles only in cases where
they are identical. If the referenced profile is not yet published, this document includes the
profile definition and related constraints’ definitions. In the case where a CGMES profile makes
restriction on the referenced profile, the restriction is defined in this document.
The equipment boundary profile (EQBD) is the only profile that is not part of IEC 61970-450-
series and IEC 61968-13 profiles. This profile is deprecated as modifications have been made
to align between EQBP and the equipment profile (EQ). Although the updated EQBD is
addressing the requirement that boundary also can be located inside a substation, which will
be the case for many Distribution System Operators (DSOs), additional information would need
to be exchanged. For instance, system integrity protection schemes, that can be shared by
multiple utility would require another way of boundary handling. In this document EQBD is
included in CGMES only to create better backwards compatibility with previous version of the
CGMES.
The machine-readable documentation that supports model driven development of the profiles
defined in this part are generated as Resource Description Framework Schema (RDFS)
according to IEC 61970-501:2006 (with some extension) and IEC 61970-501:ED2 when
published.

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This part of IEC 61557 specifies the requirements applicable to equipment for measuring the
insulation resistance of equipment and installations in the de-energized state.

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This part of IEC 61557 specifies requirements for power metering and monitoring devices (PMD) that measure and monitor the electrical quantities within electrical distribution systems, and optionally other external signals. These requirements also defin the performance of PMD in single- and three-phace AC or DC systems having rated voltages up to 1000 V AC or up to 1500 V DC.
These devices are fixed or portable. They are intended to be used indoors and/or outdoors.
Power metering and monitoring devices  (PMD), as defined in this document, give additional safety information, which aids the verification of the installation and enhances the performance of the distribution systems.
Additionally, this document specifies requirements for measurement functions dedicated to metering and monitoring of electrical parameters called power metering and monitoring function (PMF) which can be embedded in equipment (EMPF) that is not classified as PMD and for which the main function is not power metering and monitoring.
Requirements for power metering and monitoring function (PMF) and additional requirements for equipments embedding power metering and monitoring function (EPMF) are described in Annex H.
The power metering and monitoring devices (PMD) for electrical parameters described in this document are used for general industrial and commercial applications.
This document does not address functional safety and cyber security aspects.
This document is not applicable to:
- electricity metering equipment that complies with IEC 62053-21, IEC 62053-22, IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this document for active and reactive energy measurement are derived from those defined in IEC 62053 (all parts);
- the measurement and monitoring of electrical parameters defined in IEC 61557-2 to IEC 61557-9 and IEC 61557-13 or in IEC 62020;
- power quality instrument (PQI) according IEC 62586 (all parts);
- devices covered by IEC 60051 (all parts) (direct acting analogue electrical measuring instrument).
Note 1 Generally such types of devices are used in the following applications or for the following general needs:
- energy management inside the installation, such as facilitating the implementation of documents such as ISO 50001 and IEC 60364-8-1;
- monitoring and/or measurement of electrical parameters;
- measurement and/or monitoring of the quality of energy inside commercial/industrial installations.
Note 2 A measuring and monitoring device of electrical parameters usually consists of several functional modules. All or some of the functional modules are combined in one device. Examples of fuctnional modules are:
- measurement and monitoring of several electrical parameters simultaneously;
- energy measurement and/or monitoring, as well as sometimes compliance with aspects of building regulations;
- alarms functions;
- demand side quality (current and voltage harmonics, over/under voltages, voltage dips and swells, etc.).
Note 3 PMD are historically called power meter, power monitor, power monitor device, power energy monitoring device, power analyser, multifunction meter, measuring multifunction equipment, energe meters.
Note 4 Metering, measuring and monitoring applications are explained in Annex A.

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This part of IEC 61557 specifies the general requirements applicable to measuring and
monitoring equipment for testing the electrical safety in low-voltage distribution systems with
nominal voltages up to 1 000 V AC and 1 500 V DC.
When measuring equipment or measuring installations involve measurement tasks of various
measuring equipment covered by this series of standards, then the part of this series relevant
to each of the measurement tasks is applicable.
NOTE The term "measuring equipment" will hereafter be used to designate "testing, measuring and monitoring
equipment".
Other parts of IEC 61557 can specify additional requirements or deviations.
This document does not cover functional safety or cybersecurity

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This part of IEC 61557 specifies requirements for power metering and monitoring devices
(PMD) that measure and monitor the electrical quantities within electrical distribution systems,
and optionally other external signals. These requirements also define the performance in
single- and three-phase AC or DC systems having rated voltages up to 1 000 V AC or up to
1 500 V DC.
These devices are fixed or portable. They are intended to be used indoors and/or outdoors.
Power metering and monitoring devices (PMD), as defined in this document, give additional
safety information, which aids the verification of the installation and enhances the
performance of the distribution systems.
The power metering and monitoring devices (PMD) for electrical parameters described in this
document are used for general industrial and commercial applications.
This document does not address functional safety and cyber security aspects.
This document is not applicable for:
– electricity metering equipment that complies with IEC 62053-21, IEC 62053-22,
IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this document for
active and reactive energy measurement are derived from those defined in IEC 62053 (all
parts);
– the measurement and monitoring of electrical parameters defined in IEC 61557-2 to
IEC 61557-9 and IEC 61557-13 or in IEC 62020;
– power quality instrument (PQI) according IEC 62586 (all parts);
– devices covered by IEC 60051 (all parts) (direct acting analogue electrical measuring
instrument).
NOTE 1 Generally such types of devices are used in the following applications or for the following general needs:
– energy management inside the installation, such as facilitating the implementation of documents such as
ISO 50001 and IEC 60364-8-1;
– monitoring and/or measurement of electrical parameters;
– measurement and/or monitoring of the quality of energy inside commercial/industrial installations.
NOTE 2 A measuring and monitoring device of electrical parameters usually consists of several functional
modules. All or some of the functional modules are combined in one device. Examples of functional modules are:
– measurement and monitoring of several electrical parameters simultaneously;
– energy measurement and/or monitoring, as well as sometimes compliance with aspects of building regulations;
– alarms functions;
– demand side quality (current and voltage harmonics, over/under voltages, voltage dips and swells, etc.).
NOTE 3 PMD are historically called power meter, power monitor, power monitor device, power energy monitoring
device, power analyser, multifunction meter, measuring multifunction equipment, energy meters.
NOTE 4 Metering, measuring and monitoring applications are explained in Annex A.

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This part of IEC 61557 defines minimum performance requirements for non-contact AC voltage
indicators to reduce the risk of electric shock for the testing person and bystanders caused by
the wrong interpretation of the indication.
Products designed and manufactured in accordance with this document are for use by
(electrically) skilled persons only. Non-contact AC voltage indicators are not designed for
testing the absence of the operating voltage.

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This part of IEC 61557 specifies the requirements applicable to measuring equipment for measuring the resistance to earth using an AC voltage.

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This International Standard defines type, production and optional tests on thyristor valves used in thyristor controlled reactors (TCR), thyristor switched reactors (TSR) and thyristor switched capacitors (TSC) forming part of static VAR compensators (SVC) for power system applications. The requirements of the standard apply both to single valve units (one phase) and to multiple valve units (several phases).
Clauses 4 to 7 detail the type tests, i.e. tests which are carried out to verify that the valve design meets the requirements specified. Clause 8 covers the production tests, i.e. tests which are carried out to verify proper manufacturing. Clauses 9 and 10 detail optional tests, i.e. tests additional to the type and production tests.

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This part of IEC 61557 specifies the requirements applicable to equipment for measuring the
resistance of earth conductors, protective earth conductors and conductors for equipotential
bonding, including their connections and terminals, with an indication of the measured value
or an indication of the limits.

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This document is one of the IEC 61970-450 to 499 series that, taken as a whole, defines at an abstract level the content and exchange mechanisms used for data transmitted between control centres and/or control centre components, such as power systems applications.
The purpose of this document is to define the subset of classes, class attributes, and roles from the CIM necessary to execute state estimation and power flow applications. The North American Electric Reliability Council (NERC) Data Exchange Working Group (DEWG) Common Power System Modelling group (CPSM) produced the original data requirements, which are shown in Annex E. These requirements are based on prior industry practices for exchanging power system model data for use primarily in planning studies. However, the list of required data has been extended starting with the first edition of this standard to facilitate a model exchange that includes parameters common to breaker-oriented applications. Where necessary this document establishes conventions, shown in Clause 6, with which an XML data file must comply in order to be considered valid for exchange of models.
This document is intended for two distinct audiences, data producers and data recipients, and may be read from two perspectives.
From the standpoint of model export software used by a data producer, the document describes a minimum subset of CIM classes, attributes, and associations which must be present in an XML formatted data file for model exchange. This standard does not dictate how the network is modelled, however. It only dictates what classes, attributes, and associations are to be used to describe the source model as it exists.

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This part of IEC 61850 defines the IEC 61850 information models to be used in the exchange
of information with distributed energy resources (DER) and Distribution Automation (DA)
systems. DERs include distribution-connected generation systems, energy storage systems,
and controllable loads, as well as facility DER management systems, including aggregated
DER, such as plant control systems, facility DER energy management systems (EMS), building
EMS, campus EMS, community EMS, microgrid EMS, etc. DA equipment includes equipment
used to manage distribution circuits, including automated switches, fault indicators, capacitor
banks, voltage regulators, and other power management devices.
The IEC 61850 DER information model standard utilizes existing IEC 61850-7-4 logical nodes
where possible, while defining DER and DA specific logical nodes to provide the necessary data
objects for DER and DA functions, including for the DER interconnection grid codes specified
by various countries and regions.
Although this document explicitly addresses distribution-connected resources, most of the
resource capabilities, operational functions, and architectures are also applicable to
transmission-connected resources

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This part of IEC 63245 specifies requirements for spatial wireless power transfer based on
multiple magnetic resonances (SWPT-MMR), which is a non-radiative wireless power transfer
(WPT). This document contains two categories of requirements: general requirements and
functional requirements. The general requirements cover charging procedures and charging
zones. The functional requirements cover each component of a SWPT-MMR system, such as
transmitter coils.

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IEC 61557-17:2021 defines minimum performance requirements for non-contact AC voltage indicators to reduce the risk of electric shock for the testing person and bystanders caused by the wrong interpretation of the indication.
Products designed and manufactured in accordance with this document are for use by (electrically) skilled persons only. Non-contact AC voltage indicators are not designed for testing the absence of the operating voltage.
This International Standard is to be used in conjunction with IEC 61557-1:2019.

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This document specifies the methods and procedures of testing supports for overhead lines.
It applies to the testing of supports and structures of overhead lines.
There is no restriction on the type of material used in the fabrication of the supports which may
include, but not be limited to, metallic alloys, concrete, timber, laminated wood and composite
materials. If required by the client, this document can also be applied to the testing of
telecommunication supports, railway/tramway overhead electrification supports, electrical
substation gantries, street lighting columns, wind turbine towers, ski-lift supports, etc.
Tests on reduced scale models of supports are not covered by this document.

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IEC TS 63042-202:2021(E) provides common rules for the design of overhead transmission lines with the highest voltages of AC transmission systems exceeding 800 kV, so as to provide safety and proper functioning for the intended use.
This technical specification aims to give the main principles for the design of UHV AC overhead transmission lines, mainly including selection of clearance, insulation coordination and insulator strings design, bundle-conductor selection, earth wire/optical ground wires selection, tower and foundation design, environmental consideration. The design criteria apply to new construction, reconstruction and expansion of UHV AC overhead transmission line.

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This part of IEC 61970, which covers the definition of Common Grid Model Exchange Standard
(CGMES), defines the main rules and application’s requirements to meet business requirements
for assembled and merged model to fit relevant business services. This document does not
define the business requirements, business processes nor how applications are implemented.
This document defines how relevant Common Information Model (CIM) standards work together
so that specific business requirements can be resolved.
It also includes extensions to the Common Information Model (CIM). The current extensions are
defined in IEC 61970-301:2020 and will be covered in its future Amendment 1, but additional
extensions can be defined in other standards in the IEC 61970-600-series. The extensions can
be used to define additional profiles or to expand IEC 61970-450-series or IEC 61968-13
profiles. However, primary CGMES includes additional constraints on existing profiles and
validation of assembled and merged models that is based on existing profiles. This can be done
by making optional attributes and associations mandatory (required).
In addition, this document includes the specification of the serialisation that must be supported
by referring to an existing standard defined in IEC 61970-550-series, e.g., IEC 61970-552, and
making relevant constraints related to it.
The goal is to achieve interoperability between applications using CGMES in a highperformance
environment with combined minimum effort so that relevant business processes
are satisfied.
An overview of IEC 61970-600 series is provided in the following table, which also presents
identified needs that are not yet addressed.

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This International Standard applies to string insulator units of the cap and pin type with
insulating parts of ceramic material or glass, intended for AC overhead lines with a nominal
voltage greater than 1 000 V and a frequency not greater than 100 Hz. It also applies to
insulators of similar design used in substations.
This document applies to string insulator units of the cap and pin type either with ball and
socket couplings or with clevis and tongue couplings.
This document applies to string insulator units for use on overhead lines in clean areas and
polluted areas. For use in areas characterized by very heavy pollution levels and for other
particular or extreme environmental conditions, it may be necessary for certain dimensions to
be changed and insulator units having different creepage distances, spacing and forms may
be preferred (for example, flat profile, hemispherical etc.). Insulators for use on DC systems
may also need different dimensions. In any case, it is applicable that the standardized
mechanical characteristics of this document and coupling sizes are retained.
The object of this document is to prescribe specified values for the mechanical characteristics
and for the main dimensions of string insulator units of the cap and pin type.
The power frequency, lightning impulse and puncture withstand voltages of string insulator
units are not specified in this document. IEC 60383-1 gives the electrical characteristics which
define string insulator units; their values are agreed between purchaser and manufacturer.
Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by
IEC 60471.
NOTE For the definition of site pollution severity see IEC TS 60815-1.

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This International Standard is applicable to string insulator units of the long rod type with
insulating parts of ceramic material intended for use in AC overhead power lines with a
nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. It is also
applicable to insulators of similar design, used in substations.
This document is applicable to ceramic string insulator units of the long rod type, either with a
clevis end fitting at both ends for coupling with a tongue, or with a socket end fitting at both
ends for coupling with a pin ball.
The object of this document is to prescribe specified values for electrical and mechanical
characteristics, and for the principal dimensions of ceramic string insulator units of the long
rod type.
This document is applicable to string insulator units for use on overhead lines situated in
lightly polluted areas, and the creepage distances given in Table 1 have been established
accordingly, using the IEC TS 60815-2 recommendation of 27,8 mm/kV for SPS class.
However, shorter creepage distances are applicable for use in some non-polluted areas. If
specific operating conditions require or allow non-standard (longer or shorter) creepage
distances, the mechanical characteristics as well as the lengths L (see Clause 4) of this
document are intended to be used unless the need for exceptionally long creepage distances
requires values of L greater than those given in Table 1. In the case of special requirements,
e.g. very heavy polluted areas and for other particular or extreme environmental conditions, it
may be necessary for certain dimensions to be changed.
As far as reasonably applicable, this document is also applicable to be applied to similar
insulator units outside the scope of this standard, such as insulators for electric traction lines.
This document does not include tests on insulators and dimensions of end fittings.
Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by
IEC 60471.
NOTE 1 For the definition of site pollution severity, see applicable part of IEC TS 60815.
NOTE 2 The term "ceramic" is used in this document to refer to porcelain materials and, contrary to North
American practice, does not include glass.

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This part of IEC 61936 provides requirements for the design and the erection of electrical power
installations in systems with nominal voltages exceeding 1 kV AC and nominal frequency up to
and including 60 Hz, so as to provide safety and proper functioning for the use intended.
For the purpose of interpreting this document, an electrical power installation is considered to
be one of the following:
a) substation, including substation for railway power supply;
b) electrical power installations on mast, pole and tower, switchgear and/or transformers
located outside a closed electrical operating area;
c) one (or more) power station(s) located on a single site, the electrical power installation
includes generators and transformers with all associated switchgear and all electrical
auxiliary systems. Connections between generating stations located on different sites are
excluded;
d) the electrical system of a factory, industrial plant or other industrial, agricultural, commercial
or public premises;
e) electrical power installations on offshore facilities for the purpose of generation,
transmission, distribution and/or storage of electricity;
f) transition towers/poles (between overhead lines and underground lines).
The electrical power installation includes, among others, the following equipment:
– rotating electrical machines;
– switchgear;
– transformers and reactors;
– converters;
– cables;
– wiring systems;
– batteries;
– capacitors;
– earthing systems;
– buildings and fences which are part of a closed electrical operating area;
– associated protection, control and auxiliary systems;
– large air core reactor.
NOTE 1 In general, equipment standards take precedence over the requirements of this document.
This document does not apply to the design and erection of any of the following:
– overhead and underground lines between separate electrical power installations;
– electrified railway tracks and rolling stock;
– mining equipment and installations;
fluorescent lamp installations;
– installations on ships according to IEC 60092 (all parts) and offshore units according to
IEC 61892 (all parts), which are used in the offshore petroleum industry for drilling,
processing and storage purposes;
– electrostatic equipment (e.g. electrostatic precipitators, spray-painting units);
– test sites;
– medical equipment, e.g. medical X-ray equipment.
This document does not apply to the design of prefabricated, type-tested switchgear and high
voltage/low voltage prefabricated substation, for which separate IEC standards exist.
NOTE 2 The scope of this document does not include the requirements for carrying out live working on electrical
power installations.
NOTE 3 The scope of this document considers safety requirements for HV installations and the influences of HV
installations on LV installations. For electrical installations up to 1 kV, IEC 60364 (all parts) applies.

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IEC TS 63042-302:2021(E) applies to the commissioning of UHV AC transmission systems.
It mainly specifies the test purposes, test items, test preconditions, test methods and test acceptance criteria during pre-commissioning and system commissioning. Also, the measurement requirements for system commissioning are specified.

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IEC 61954:2021 is available as IEC 61954:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61954:2021 defines type, production and optional tests on thyristor valves used in thyristor controlled reactors (TCR), thyristor switched reactors (TSR) and thyristor switched capacitors (TSC) forming part of static VAR compensators (SVC) for power system applications. The requirements of the document apply both to single valve units (one phase) and to multiple valve units (several phases). Clauses 4 to 7 detail the type tests, i.e. tests which are carried out to verify that the valve design meets the requirements specified. Clause 8 covers the production tests, i.e. tests which are carried out to verify proper manufacturing. Clauses 9 and 10 detail optional tests, i.e. tests additional to the type and production tests. This edition includes the following significant technical changes with respect to the previous edition: important clarifications were made in 4.4.1.2, 5.1.2.2, 5.1.3.2, 5.2.3.2, 6.1.2.2, 6.1.2.4, 6.1.3.2, 6.2.2.2, 6.2.2.4, 6.3.2.2 and 9.3.2.

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IEC TS 63042-102:2021(E) specifies the procedure to plan and design UHV transmission projects and the items to be considered.
The objective of UHV AC power system planning and design is to achieve both economic efficiency and high reliability, considering its impact on EHV systems.

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IEC 60652:2021 is available as IEC 60652:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60652:2021 specifies the methods and procedures of testing supports for overhead lines. It applies to the testing of supports and structures of overhead lines. There is no restriction on the type of material used in the fabrication of the supports which may include, but not be limited to, metallic alloys, concrete, timber, laminated wood and composite materials. If required by the client, this document can also be applied to the testing of telecommunication supports, railway/tramway overhead electrification supports, electrical substation gantries, street lighting columns, wind turbine towers, ski-lift supports, etc. Tests on reduced scale models of supports are not covered by this document. This third edition cancels and replaces the second edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Title modified;
b) Added reference to CIGRE Brochure 399;
c) In Clause 7, added test limitation for wind speed and direction during testing;
d) In paragraph 10.5, added load increments for destruction tests;
e) In paragraph 10.7, added a requirement for an agreement between client and testing station when testing supports made of creep-sensitive materials;
f) In Clause 17, added requirements for sampling procedure to be provided in the test report.

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This part of IEC 62488 applies to power line carrier terminals and networks used to transmit information over power networks including extra high, high and medium voltage (EHV/HV/MV) power lines using both digital and optionally analogue modulation systems in a frequency range between 16 kHz and 1 MHz (see also IEC 62488-1). In many countries, power line carrier (PLC) channels represent a significant part of the utilityowned telecommunication system. A circuit normally routed via a PLC channel can also be routed via a channel using a different transmission medium such as point to point radio, optical fibre or open wire circuit. It is therefore important that the input and output interfaces that are used between terminals in the communication system are standardised. The issues requiring consideration of DPLC and/or APLC devices as parts of a telecommunication network can be found in IEC 62488-1. Figure 1 shows the correspondence between the elements needed to implement PLC systems and the related International Standards.

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This part of IEC 61243 is applicable to portable voltage detectors, with or without built-in power
sources, to be used on electrical systems for voltages of 1 kV to 800 kV AC, and frequencies
of 50 Hz and/or 60 Hz.
This document applies only to voltage detectors of capacitive type used in contact with the bare
part to be tested, as a complete device including its insulating element or as a separate device,
adaptable to an insulating stick which, as a separate tool, is not covered by this document
(see 4.4.2.1 for general design).
Other types of voltage detectors are not covered by this document.
NOTE Self ranging voltage detectors (formally "multi range voltage detectors") are not covered by this document.
Some restrictions or formal interdictions on their use are applicable in case of switchgear of
IEC 62271 series design, due to insulation coordination, on overhead line systems of electrified
railways (see Annex B) and systems without neutral reference. For systems without neutral
reference, the insulating level is adapted to the maximum possible voltage to the earth (ground).
Products designed and manufactured according to this document contribute to the safety of
users provided they are used by persons trained for the work, in accordance with the hot stick
working method and the instructions for use.
Except where otherwise specified, all the voltages defined in this document refer to values of
phase-to-phase voltages of three-phase systems. In other systems, the applicable phase-tophase
or phase-to-earth (ground) voltages are used to determine the operating voltage.

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Per the IEC 61968 Interface Reference Model, the Network Operations function defined in this part of IEC 61968 provides utilities the means to supervise main substation topology (breaker and switch state), feeder topology and control equipment status through SCADA, AMI and other data sources. It also provides the means for handling network connectivity and loading conditions. Finally, it makes it possible for utilities to locate customer telephone complaints and coordinate activities of field crews with respect to planned and unplanned outages.
IEC 61968-3 specifies the information content of a set of message payloads that can be used to support many of the business functions related to network operations. Typical uses of the message payloads defined in IEC 61968-3 include data acquisition by external systems, fault isolation, fault restoration, trouble management and coordination of the real-time state of the network.
The scope diagram shown in [Figure 1] illustrates the possibility of implementing IEC 61968-3 functionality 51 as either a single integrated advanced distribution management system or as a set of separate functions - OMS, DMS and SCADA. Utilities may chose to buy these systems from different vendors and integrate them using the IEC 61968-3 messages. Alternatively, a single vendor could provide two or all of these components as a single integrated system. In the case of more than one system being provided by the same vendor, the vendor may chose to use either extensions of the IEC 61968- messages or a proprietary integration mechanism to provide enhanced functionality over and above what is required/supported by the IEC 61968-3 specification. While this is a possible implementation, clause 4.3 defines the scope in terms of business functions that are implemented in common vendor offerings.
Annexes in this standard document integration scenarios or use cases, which are informative examples showing typical ways of using the message payloads defined in this document as well as message payloads to be defined in other parts of the IEC 61968 series.

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IEC 61318:2021 This document defines methods to assess defects and to verify that products after the manufacturer process meet the requirements of the corresponding product standard.
The principles of assessment of defects for live working products are detailed in this document to assist product standard developers in prescribing the best means to achieve suitable quality of every finished tool, device and piece of equipment.
The following elements are not covered by the present document, but are included in each product standard:
– type tests;
– provisions and description for routine, sampling and acceptance tests;
– identification and classification of defects;
– risk analysis.
This document does not cover conformity assessment of commercial shipments or certifications.
This fourth edition cancels and replaces the third edition published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) change of the purpose of the document from a prescriptive testing standard to a standard assisting the project team in the conformance to respective product standard.
b) introduction of conformance test, record of process, quality control documentation, adapted to the standard product.
c) change of prescribed sampling procedure to adapted sampling tests to the product standard.
d) suppression of the term “conformity assessment”.
e) Introduction of the term “verification method” replacing “conformity assessment application”.

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IEC 61597:2021(E) which is a Technical Report provides information with regard to conductors specified in IEC 61089 and other aluminium and aluminium steel conductors. Such information includes properties of conductors and useful methods of calculation. The following chapters are included in this document.
– current carrying capacity of conductors: Calculation method and typical example
– alternating current resistance, inductive and capacitive reactances
– elongation of conductors: Thermal and stress-strain data
– conductor creep
– loss of strength of aluminium wires due to high temperatures
It is noted that this document does not discuss all theories and available methods for calculating conductor properties, but provides users with simple methods that provide acceptable accuracies.
This second edition cancels and replaces the first edition published in 1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Addition of Clause 2 and Clause 3 since the “Normative references” and “Terms and definitions” clauses are mandatory elements of the text according to the new IEC template.
b) In Clause 6, addition of new kinds of aluminium alloy and aluminium clad steel and their values of temperature coefficients of resistance.
c) In Clause 6, addition of guidelines for the calculation of AC resistance taken into account hysteresis and eddy current losses.
d) In Clause 7, addition of the values of coefficient of linear expansion of aluminium alloy conductor aluminium-clad steel reinforced series.
e) Deletion of Clause 8 “Calculation of maximum conductor length on drums” in the last version.
f) Annex A, replaced by “A practical example of CCC calculation”.
g) Annex B, replaced by “Indicative conditions for CCC calculation”.

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IEC 62271-215:2021 is applicable to phase comparators designed to be plugged into the testing points of a voltage detecting and indicating system (VDIS) according to IEC 62271-213, to give an indication of the result of a phase comparison.
The main usage is to provide a clear evidence of the phase relationship between two energized parts of a high-voltage network, at the same nominal voltage and frequency before coupling them.
This first edition cancels and replaces the first edition of IEC 61243-5 published in 1997 and the first edition of IEC 62271-206 published in 2011. This edition constitutes a merging of the content of IEC 61243-5 and IEC 62271-206.
This edition includes the following significant technical changes with respect to the previous editions of IEC 61243-5 and IEC 62271-206:  
the document does not include the specific phase comparators (SPCs) as defined in IEC 61243-5, which was specific to manufacturers, and takes back the technical principles of the universal phase comparator (UPC) for VDIS of all manufacturers;
the phase comparator for sequential connected operation is introduced to facilitate the operation of phase comparation of large MV panels.

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IEC TR 60909-4:2021 which is a Technical Report, is intended to give help for the application of IEC 60909-0 for the calculation of short-circuit currents in 50 Hz or 60 Hz three-phase AC systems.
This document does not include additional requirements but gives support for the modelling of electrical equipment in the positive-sequence, the negative-sequence and the zero-sequence system (Clause 4), the practical execution of calculations in a low-voltage system (Clause 5), a medium-voltage system with asynchronous motors (Clause 6) and a power station unit with its auxiliary network feeding a large number of medium-voltage asynchronous motors and low-voltage motor groups (Clause 7).
The three examples given in Clauses 5, 6 and 7 are similar to those given in IEC TR 60909-4:2000 but they are revised in accordance with IEC 60909-0, which replaces it. The example given in Clause 8 is new and mirrors the introduction of the new 6.8 of IEC 60909-0:2016.
Clause 9 gives the circuit diagram and the data of a test network and the results for a calculation carried out in accordance with IEC 60909-0, to offer the possibility for a comparison between the results found with a digital program for the calculation of short-circuit currents and the given results for and in a high-voltage network with power station units, generators, asynchronous motors and lines in four different voltage levels 380 kV, 110 kV, 30 kV and 10 kV.
This second edition cancels and replaces the first edition published in 2000. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) adaption to IEC 60909-0:2016;
b) addition of an example for the calculation of short-circuit currents of wind power station units;
c) correction of errors.

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IEC 62271-213:2021 is applicable to the voltage detecting and indicating system (VDIS) to be installed on indoor and outdoor high-voltage equipment.
The VDIS as defined by this document includes a coupling system per phase (capacitive, resistive coupling or other technology) to connect to live parts (main circuit).
This first edition cancels and replaces the first edition of IEC 61243-5 published in1997 and the first edition of IEC 62271-206 published in 2011. This edition constitutes a merging of the content of IEC 61243-5 and IEC 62271-206.
This edition includes the following significant technical changes with respect to the previous editions of IEC 61243-5 and IEC 62271-206:
a) an optional output signal is defined to be used for multipurpose use cases;
b) only one interface is defined for voltage detecting and indicating system (VDIS);
c) the measurement of the current carrying capacity of the voltage limiting element is considered as inaccurate and is not considered in this document. The experience shows that a probability of the failure of the coupling element is negligible.

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This part of IEC 62325 specifies a UML package for the electricity balancing business process
and its associated document contextual models, assembly models and XML schemas for use
within the European style electricity markets.
This part of IEC 62325 is based on the European style market contextual model
(IEC 62325-351). The business process covered by this part of IEC 62325 is described in
Clause 5.
The relevant aggregate core components (ACCs) defined in IEC 62325-351 have been
contextualised into aggregated business information entities (ABIEs) to satisfy the requirements
of the European style market publication business process.

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This part of IEC 61970 specifies a standard interface for exchanging dynamic model information
needed to support the analysis of the steady state stability (small-signal stability) and/or
transient stability of a power system or parts of it. The schema(s) for expressing the dynamic
model information are derived directly from the CIM, more specifically from IEC 61970-302.
The scope of this document includes only the dynamic model information that needs to be
exchanged as part of a dynamic study, namely the type, description and parameters of each
control equipment associated with a piece of power system equipment included in the steady
state solution of a complete power system network model. Therefore, this profile is dependent
upon other standard profiles for the equipment as specified in IEC 61970-452, CIM static
transmission network model profiles, the topology, the steady state hypothesis and the steadystate
solution (as specified in IEC 61970-456, Solved power system state profiles) of the power
system, which bounds the scope of the exchange. The profile information described by this
document needs to be exchanged in conjunction with IEC 61970-452 and IEC 61970-456
profiles’ information to support the data requirements of transient analysis tools. IEC 61970-456
provides a detailed description of how different profile standards can be combined to form
various types of power system network model exchanges.
This document supports the exchange of the following types of dynamic models:
• standard models: a simplified approach to exchange, where models are contained in
predefined libraries of classes interconnected in a standard manner that represent dynamic
behaviour of elements of the power system. The exchange only indicates the name of the
model along with the attributes needed to describe its behaviour.
• proprietary user-defined models: an exchange that would provide users the ability to
exchange the parameters of a model representing a vendor or user proprietary device where
an explicit description of the model is not described in this document. The connections
between the proprietary models and standard models are the same as described for the
standard models exchange. Recipient of the data exchange will need to contact the sender
for the behavioural details of the model.
This document builds on IEC 61970-302, CIM for dynamics which defines the descriptions of
the standard dynamic models, their function block diagrams, and how they are interconnected
and associated with the static network model. This type of model information is assumed to be
pre-stored by all software applications hence it is not necessary to be exchanged in real-time
or as part of a dynamics model exchange.

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This part of IEC 61968 specifies profiles that can be used to exchange Network Models in a
Utility or between a Utility and external applications to the utility. This document provides a list
of profiles which allow to model balanced and unbalanced distribution networks in order to
conduct network analysis (Power flow calculation). Therefore, it leverages already existing
profiles (IEC 61970-45x based on IEC 61970-301 (CIM base) or profiles based on
IEC 6196811
CIM extension for Distribution). This document reuses some profiles without any
change, or eventually extends them or restricts them. Moreover, it proposes other profiles to
reflect Distribution needs.
Use of CIM in Distribution is not a new topic. Several documents can be of interest
[13][17][18][19][20]. This document includes informative parts, as CIM model extensions, which
could be integrated in future versions of the IEC CIM Model. These extensions have been used
by some utilities for utility internal information exchange use cases and to support information
exchanges between different market participants like Transmisstion System Operators (TSO),
Distributed System Operators (DSO), Distributed Network Operators (DNO) and Significant Grid
Users (SGU) including generators and industry (see Annex J for example).

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A new overhead line is defined as the new construction of the totality of all conductors, their supports together with foundations, earthing grid, insulators, accessories and fittings used for the overground transport of electrical energy between two points A and B.

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IEC 61243-1:2021 is applicable to portable voltage detectors, with or without built-in power sources, to be used on electrical systems for voltages of 1 kV to 800 kV AC, and frequencies of 50 Hz and/or 60 Hz.
This document applies only to voltage detectors of capacitive type used in contact with the bare part to be tested, as a complete device including its insulating element or as a separate device, adaptable to an insulating stick which, as a separate tool, is not covered by this document (see 4.4.2.1 for general design).
Other types of voltage detectors are not covered by this document.
Self ranging voltage detectors (formally "multi range voltage detectors") are not covered by this document.
Some restrictions or formal interdictions on their use are applicable in case of switchgear of IEC 62271 series design, due to insulation coordination, on overhead line systems of electrified railways (see Annex B) and systems without neutral reference. For systems without neutral reference, the insulating level is adapted to the maximum possible voltage to the earth (ground).
Products designed and manufactured according to this document contribute to the safety of users provided they are used by persons trained for the work, in accordance with the hot stick working method and the instructions for use.
Except where otherwise specified, all the voltages defined in this document refer to values of phase-to-phase voltages of three-phase systems. In other systems, the applicable phase-to-phase or phase-to-earth (ground) voltages are used to determine the operating voltage.
This third edition cancels and replaces the second edition published in 2003 and Amend-ment 1:2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The scope is more precise, stating that only bare contact to the part to be tested is reliable for these contact voltage detectors. The rationale is that tests on painted or coated conductors have led to wrong indications, as this non-conductive paint or coat acts as a capacitor with different capacity according to the thickness. This capacity has an effect on the threshold voltage.
b) A contact probe is introduced as a new type of non-conductive contact electrode.
c) A new type "exclusively outdoor type" has been defined and implemented into the requirements and test procedure.
d) A selector for voltage and frequency is allowed if foreseeable misuse is excluded.
e) The marking for voltage detectors with low interference voltage has been made more precise.
f) The indication groups have been made more precise and requirements and tests for the "ready to operate state" and "stand-by state" added.
g) Requirements and tests for electromagnetic compatability have been implemented.
h) An example for good electrical connection for the tests is introduced.

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