NTF - Electricity energy supply systems

This document in conjunction with CLC/TS 50654-1: 2018-03 Guideline for Functional Specifications describes specific functional requirements for HVDC Grid Systems in Europe. The terminology “HVDC Grid Systems” is used here describing HVDC systems for power transmission having more than two converter stations connected to a common DC circuit.
While this document focuses on requirements, that are specific for HVDC Grid Systems, some requirements are considered applicable to all HVDC systems in general, i.e. including point-to-point HVDC systems. Existing IEC, Cigré or other documents relevant have been used for reference as far as possible.
Corresponding to electric power transmission applications, this document is applicable to high voltage systems, i.e. only nominal DC voltages equal or higher than 50 kV with respect to earth are considered in this document.

This document in conjunction with CLC/TS 50654-2: 2018-03 Parameter Lists to Functional Specifications describes specific functional requirements for HVDC Grid Systems in Europe. The terminology "HVDC Grid Systems" is used here describing HVDC systems for power transmission having more than two converter stations connected to a common DC circuit.
While this document focuses on requirements, that are specific for HVDC Grid Systems, some requirements are considered applicable to all HVDC systems in general, i.e. including point-to-point HVDC systems. Existing IEC, Cigré or other documents relevant have been used for reference as far as possible.
Corresponding to electric power transmission applications, this document is applicable to high voltage systems, i.e. only nominal DC voltages equal or higher than 50 kV with respect to earth are considered in this document.

New values for the 15th and 21st harmonic

3 rather small amendments
A note 2 will solve the issue of the different approaches in frequency
Flagged data idea (IEC TS 62749) will be integrated in EN 50160
A new chapter “Frequency range 2-150kHz” will be integrated

These standards provide technical requirements for the connection of generating plants up to and including Type A (-1-1)/ Type B (-1-2) which can be operated in parallel with a public LV distribution network. They are intended to be used as a technical reference for connection agreements between DNOs and electricity producers and to demonstrate compliance with COMMISSION REGULATION (EU) 2016/631 (Requirements for Generators).

2019-09-17: No XML available because of the template of CLC corrigendum

This standard provides technical requirements for the connection of generating plants up to and including Type B which can be operated in parallel with a public MV distribution network. They are intended to be used as a technical reference for connection agreements between DSOs and electricity producers and to demonstrate compliance with COMMISSION REGULATION (EU) 2016/631 (Requirements for Generators).

These standards provide technical requirements for the connection of generating plants up to and including Type A (-1-1)/ Type B (-1-2) which can be operated in parallel with a public LV distribution network. They are intended to be used as a technical reference for connection agreements between DNOs and electricity producers and to demonstrate compliance with COMMISSION REGULATION (EU) 2016/631 (Requirements for Generators).

In order to exchange use cases based on the template which is defined in IEC 62559-2, this
part of IEC 62559 establishes the interfaces between the different use case repositories
and/or UML engineering software tools.
Therefore, this document defines the required core concepts and their serialization into XML
syntactic format of a use case template, an Actor list and list for detailed requirements.
As shown in Figure 2, the modelling approach is leveraging the use of UML in order to
graphically represent the data contained in a use case based on the IEC 62559 template.
Therefore the textual format of the use case template may be in the use case development
process just a starting point for business experts or an easy way to modify use case data for
non UML experts. As a consequence, it is important for the IEC 62559 series to provide a
reliable way for converting this textual format into UML format and reciprocally. As soon as a
use case repository is maintained based on the IEC 62559 series, another related need is to
be able to import/export between different UML tools and different use case repositories the
use case related information based on a tool independent format.
The main purpose of this document is to propose an independent format for transferring the
use case information between modelling software. In order to satisfy this goal, the syntactic
XML format is chosen to serialize the use case data. This document defines in detail the core
concepts of the template into UML and their transformations into XML using the XSD
standard.
Once this level of interoperability is achieved, IEC 62559 can provide a reliable mechanism to
interpret those XML data in order to represent graphically UML use cases. This need will be
covered as well in a future part of IEC 62559 (to be defined).
This document focuses on a methodological framework which is also used by IEC TC 57
standards and which is summarized in Clause 4.
In order to exchange use cases based on the template which is defined in IEC 62559-2, this
document establishes the interfaces between the different use case repositories and/or UML
tools.

IEC 60909-0:2016 is applicable to the calculation of short-circuit currents in low-voltage three-phase AC systems, and in high-voltage three-phase AC systems, operating at a nominal frequency of 50 Hz or 60 Hz. It establishes a general, practicable and concise procedure leading to results which are generally of acceptable accuracy and deals with the calculation of short-circuit currents in the case of balanced or unbalanced short circuits. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- contribution of windpower station units to the short-circuit current;
- contribution of power station units with ful size converters to the short-circuit current;
- new document structure.

This part of IEC 62559 “Use case methodology” defines the structure of a use case template,
template lists for actors and requirements, as well as their relation to each other. In this
document, a standardized template for the description of use cases is defined for various
purposes like the use in standardization organizations for standards development or within
development projects for system development.
This document was developed for general application in various domains and systems. The
energy system/smart grid is used as example in this document as it was one of the first usage
areas for this use case template, but this general template can be applied in other usage areas
different from energy systems as well (e.g. smart home or electro-mobility).
The motivation, background information on use cases, recommendations for the handling of
use cases and the processes for the description of use cases inside standardization and in
relation to a central use case repository is described in IEC 62559-1.

The purpose of this Technical Specification is to provide technical guidance for the connection of generating plants which can be operated in parallel with a public distribution network.
This Technical Specification is intended to be used as a technical reference in connection agreements between DNOs and electricity producers.
The requirements of this Technical Specification only apply to electrical machinery and equipment, irrespective of the kind of primary energy source.
This Technical Specification applies to all three-phase generating units that meet all of the following conditions as an individual generating unit or as a cluster of generating units with a common point of connection:
•   converting any primary energy source into AC electricity;
•   connected to the MV network;
•   intended to operate in parallel with a public distribution network under normal network operating conditions.
This Technical Specification defines interconnection requirements and a conformance test procedure.
Island operation of generating plants, both intentional and unintentional, where no part of the public distribution system is involved is out of the scope of this Technical Specification.
Safety of personnel is out of the scope of this Technical Specification.
This Technical Specification recognises the existence of National Standards and Network Codes: these must be complied with. Only in the absence of these National Standards and Codes should the requirements of this Technical Specification be applied.

The purpose of this Technical Specification is to provide technical guidance on the requirements for
generating plants which can be operated in parallel with a distribution network.
For practical reasons, this Technical Specification refers to the distribution system operator in case
settings have to be defined and/or provided, even when these settings are to be defined and/or
provided by another actor according to national and European legal framework.
NOTE 1 This includes European network codes and their national implementation, as well as further national
regulations.
NOTE 2 Further national requirements especially for the connection to the distribution network and the
operation of the generating plant can apply.
The requirements of this Technical Specification apply to all generating plants, electrical machinery
and electronic equipment, irrespective of the kind of primary energy source and irrespective of the
presence of loads in the producer’s network that meet all of the following conditions:
– converting any primary energy source into AC electricity;
– connected to a LV distribution network and rated at more than 16 A per phase;
– intended to operate in parallel with this distribution network under normal network operating
conditions.
NOTE 3 Generating plants rated up to and including 16 A per phase are covered by EN 50438.
NOTE 4 Generating plants connected to a MV distribution network fall into the scope of CLC/TS 50549-2.
Unless stated differently by the DSO generating plants connected to a medium voltage distribution
network with a maximum apparent power up to 100 kVA can comply with this Technical Specification
as alternative to the requirements of CLC/TS 50549-2. A different threshold may be defined by the
DSO.
This Technical Specification defines connection requirements.
This Technical Specification recognizes the existence of National Standards, Network Codes, and
specific technical requirements of the DSOs. These should be complied with.
Excluded from the scope are:
– the selection and evaluation of the point of connection;
– power system impact assessment;
– connection assessment;
– island operation of generating plants, both intentional and unintentional, where no part of the
distribution network is involved;
– active front ends of drives feeding energy back into the distribution network for short duration;
– requirements for the safety of personnel as they are already adequately covered by existing
European Standards.

Amendment to cover Norwegian A-deviation.

The aim of this Technical Report is to provide background information and explanations on EN 50160 with regard to the history of its development as well as to its correct application.

This Technical Report provides an overview of the technical contents and regulatory arrangements of some 32 of the many Smart Grid projects that are currently in operation, or under construction, within Europe 1). This Technical Report is intended to provide useful information to those organisations and individuals that are currently engaged or about to become engaged in developing Smart Grids. It is also intended that this Technical Report will be used to support the development of relevant standards by presenting the key learning points from early Smart Grid projects - it is widely accepted that the publication of relevant standards will accelerate the development of Smart Grids. It is recognised that this Technical Report only covers a sample of the Smart Grid projects within Europe; it would be impractical to attempt to include every project. It is assessed that the 32 projects shown in this Technical Report are sufficiently representative to provide information and draw early conclusions. Clause 2 of this Technical Report provides a brief overview of all 32 projects, Annex A contains details of the 32 projects as supplied by the countries that participated in the drafting of this Technical Report. This Technical Report presents the situation for the 32 projects as they are at the time of writing; as time moves on, it might be necessary to update this Technical Report or to produce a second edition containing information on more recent projects and learning from existing projects, such as those documented in this Technical Report.

This Technical Report applies to HVDC Systems having more than two converter stations connected to a common DC network, also referred to as HVDC Grid Systems. Serving the near term applications, this report describes radial HVDC network structures as well as pure VSC based solutions. Both grounded and ungrounded DC circuits are considered. Based on typical requirements applied to state of the art HVDC converter stations today this report addresses aspects that are specifically related to the design and operation of converter stations and DC circuits in HVDC Grid Systems. The requirements from the AC systems as known today are included. Secondary effects associated with changing the AC systems, e.g. the replacement of rotating machines by power electronic devices, are not within the scope of the present report. The report summarizes applications and concepts of HVDC Grid Systems with the purpose of preparing the ground for standardization of such systems. The interface requirements and functional specifications given in this document are intended to support the specification and purchase of multi-vendor multiterminal HVDC Grid Systems.

This European Standard specifies technical requirements for the protection functions and the operational capabilities of micro-generating plants, designed for operation in parallel with public lowvoltage distribution networks. This European Standard applies irrespectively of the micro-generating plants’ primary source of energy, where micro-generation refers to equipment with nominal currents up to and including 16 A per phase, single or multi phase 230/400 V or multi phase 230 V (phase-to-phase nominal voltage). For practical reasons, this European Standard refers to the distribution system operator in case settings have to be defined and/or provided, even when these settings are to be defined and/or provided by another actor according to national and European legal framework.
NOTE 1 This includes European network codes and their national implementation, as well as further national regulations.
NOTE 2 Further national requirements especially for the connection to the grid and the operation of the micro-generator can apply as long as they are not in conflict with this EN. In some countries, this document may be applied to generators with higher nominal currents used mostly in domestic and small commercial installations. These countries are listed in Annex G. The provisions of this European Standard are not intended to ensure by themselves the safety of DSO personnel or their contracted parties. The following aspects are included in the scope:
• all micro-generation technologies are applicable.
The following aspects are excluded from the scope:
• multiple units that for one installation, in aggregate, exceed 16 A;
• issues of revenue rebalancing, metering or other commercial matters;
• requirements related to the primary energy source e.g. matters related to gas fired generator units;
• island operation of generating plants, both intentional and unintentional, where no part of the public distribution network is involved;
• active front ends of drives feeding energy back into the distribution network for short duration.

This European Standard defines, describes and specifies the main characteristics of the voltage at a network user's supply terminals in public low voltage, medium and high voltage AC electricity networks under normal operating conditions. This standard describes the limits or values within which the voltage characteristics can be expected to remain at any supply terminal in public European electricity networks and does not describe the average situation usually experienced by an individual network user. This European Standard does not apply under abnormal operating conditions, including the following: a) a temporary supply arrangement to keep network users supplied during conditions arising as a result of a fault, maintenance and construction work, or to minimize the extent and duration of a loss of supply; b) in the case of non-compliance of a network user's installation or equipment with the relevant standards or with the technical requirements for connection, established either by the public authorities or the network operator, including the limits for the emission of conducted disturbances; c) in exceptional situations, in particular, 1) exceptional weather conditions and other natural disasters; 2) third party interference; 3) acts by public authorities; 4) industrial actions (subject to legal requirements); 5) force majeure; 6) power shortages resulting from external events. The voltage characteristics given in this standard are not intended to be used as electromagnetic compatibility (EMC) levels or user emission limits for conducted disturbances in public electricity networks. The voltage characteristics given in this standard are not intended to be used to specify requirements in equipment product standards and in installation standards.

This part of IEC 60865 is applicable to the mechanical and thermal effects of short-circuit currents. It contains procedures for the calculation of - the electromagnetic effect on rigid conductors and flexible conductors, - the thermal effect on bare conductors. For cables and insulated conductors, reference is made, for example, to IEC 60949 and IEC 60986. For the electromagnetic and thermal effects in d.c. auxiliary installations of power plants and substations reference is made to IEC 61660-2. Only a.c. systems are dealt with in this standard. The following points should, in particular, be noted: a) The calculation of short-circuit currents should be based on IEC 60909. For the determination of the greatest possible short-circuit current, additional information from other IEC standards may be referred to, e.g. details about the underlying circuitry of the calculation or details about current-limiting devices, if this leads to a reduction of the mechanical stress. b) Short-circuit duration used in this standard depends on the protection concept and should be considered in that sense. c) These standardized procedures are adjusted to practical requirements and contain simplifications which are conservative. Testing or more detailed methods of calculation or both may be used. d) In Clause 5 of this standard, for arrangements with rigid conductors, only the stresses caused by short-circuit currents are calculated. Furthermore, other stresses can exist, e.g. caused by dead-load, wind, ice, operating forces or earthquakes. The combination of these loads with the short-circuit loading should be part of an agreement and/or be given by standards, e.g. erection-codes. The tensile forces in arrangements with flexible conductors include the effects of deadload. With respect to the combination of other loads the considerations given above are valid. e) The calculated loads are design loads and should be used as exceptional loads without any additional partial safety factor according to installation codes of, for example, IEC 61936-1.

IEC 60038:2009 specifies standard voltage values which are intended to serve as preferential values for the nominal voltage of electrical supply systems, and as reference values for equipment and system design. This seventh edition supersedes the sixth edition (1993), its Amendment 1 (1994) and its Amendment 2 (1997). It constitutes a technical revision. The significant technical changes are:
- the addition of the values of 230 V (50 Hz) and 230/400 V (60 Hz) to Table 1;
- the replacement of the utilization voltage range at LV by a reference to the relevant standard and an informative annex;
- the addition of the value of 30 kV to Table 3;
- the replacement of the value of 1 050 kV by 1 100 kV in Table 5.
It has the status of a horizontal standard in accordance with IEC Guide 108.

D138/C037: Corrigendum to CLC/TR 50555:2010 (PR=22110) to add the words "in cooperation with CEER" in the foreword

This Technical Report provides guidance on how to calculate continuity of supply indices. These
recommended indices are more particularly given for European benchmarking of distribution network performance. For transmission network performance, more representative indices 2) may be used.
It presents
– an overview of practices in Europe on long and short interruptions,
– definition of physical interruptions in a harmonized way,
– philosophy and criteria for recommending indices,
– a suggested common approach to continuity indices.
The fact that the networks in different parts of any particular country will be subject to different conditions (e.g. weather and customer density) mean that it is not viable to apply common performance standards to all networks within any one country or any group of countries without
making these targets so weak that there is a good prospect of them being achieved in all areas. The
present situation where national regulators set performance targets within their own countries is widely regarded as being the most effective mechanism for achieving optimal socio-economic performance.
For these reasons this Technical Report does not provide common targets for the number and duration of interruptions that should not be exceeded.
This Technical Report is designed to be a first step towards benchmarking the interruption performance of European countries. Rules on the aggregation of interruptions, in particular short
interruptions, have not been considered in this Technical Report, however it is recognised that it might be necessary to describe aggregation rules in a second version of the Technical Report.

This European Standard defines, describes and specifies the main characteristics of the voltage at a network user's supply terminals in public low voltage, medium and high voltage AC electricity networks under normal operating conditions. This standard describes the limits or values within which the voltage characteristics can be expected to remain at any supply terminal in public European electricity networks and does not describe the average situation usually experienced by an individual network user. This European Standard does not apply under abnormal operating conditions, including the following: a) a temporary supply arrangement to keep network users supplied during conditions arising as a result of a fault, maintenance and construction work, or to minimize the extent and duration of a loss of supply; b) in the case of non-compliance of a network user's installation or equipment with the relevant standards or with the technical requirements for connection, established either by the public authorities or the network operator, including the limits for the emission of conducted disturbances; c) in exceptional situations, in particular, 1) exceptional weather conditions and other natural disasters; 2) third party interference; 3) acts by public authorities; 4) industrial actions (subject to legal requirements); 5) force majeure; 6) power shortages resulting from external events. The voltage characteristics given in this standard are not intended to be used as electromagnetic compatibility (EMC) levels or user emission limits for conducted disturbances in public electricity networks. The voltage characteristics given in this standard are not intended to be used to specify requirements in equipment product standards and in installation standards.

This part of IEC 60909 specifies procedures for calculation of the prospective short-circuit currents with an unbalanced short circuit in high-voltage three-phase a.c. systems operating at nominal frequency 50 Hz or 60 Hz, i. e.: a) currents during two separate simultaneous line-to-earth short circuits in isolated neutral or resonant earthed neutral systems; b) partial short-circuit currents flowing through earth in case of single line-to-earth short circuit in solidly earthed or low-impedance earthed neutral systems. The currents calculated by these procedures are used when determining induced voltages or touch or step voltages and rise of earth potential at a station (power station or substation) and the towers of overhead lines. Procedures are given for the calculation of reduction factors of overhead lines with one or two earth wires. The standard does not cover: a) short-circuit currents deliberately created under controlled conditions as in short circuit testing stations, or b) short-circuit currents in the electrical installations on board ships or aeroplanes, or c) single line-to-earth fault currents in isolated or resonant earthed systems. The object of this standard is to establish practical and concise procedures for the calculation of line-to-earth short-circuit currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents through earth, earth wires of overhead lines and sheaths or shields of cables leading to conservative results with sufficient accuracy. For this purpose, the short-circuit currents are determined by considering an equivalent voltage source at the short-circuit location with all other voltage sources set to zero. Resistances of earth grids in stations or footing resistances of overhead line towers are neglected, when calculating the short-circuit currents at the short-circuit location. This standard is an addition to IEC 60909-0. General definitions, symbols and calculation assumptions refer to that publication. Special items only are defined or specified in this standard. The calculation of the short-circuit currents based on the rated data of the electrical equipment and the topological arrangement of the system has the advantage of being possible both for existing systems and for systems at the planning stage. The procedure is suitable for determination by manual methods or digital computation. This does not exclude the use of special methods, for example the super-position method, adjusted to particular circumstances, if they give at least the same precision. As stated in IEC 60909-0, short-circuit currents and their parameters may also be determined by system tests.

IEC 60038:2009 specifies standard voltage values which are intended to serve as preferential values for the nominal voltage of electrical supply systems, and as reference values for equipment and system design. This seventh edition supersedes the sixth edition (1993), its Amendment 1 (1994) and its Amendment 2 (1997). It constitutes a technical revision. The significant technical changes are:
- the addition of the values of 230 V (50 Hz) and 230/400 V (60 Hz) to Table 1;
- the replacement of the utilization voltage range at LV by a reference to the relevant standard and an informative annex;
- the addition of the value of 30 kV to Table 3;
- the replacement of the value of 1 050 kV by 1 100 kV in Table 5.
It has the status of a horizontal standard in accordance with IEC Guide 108.

Gives standard current ratings in the range 1 A to 200 000 A.

The standard frequencies are the frequencies to be adopted for single-phase and three-phase a.c. systems, for installations in ships, for a.c. traction systems, for tools and for aircraft. This standardization is limited to frequencies up to 10 000 Hz.

This Publicly Available Specification (PAS) defines a methodology for power system domain experts to determine and describe their user requirements for automation systems, based on their utility business needs. This methodology was originally developed as part of the IntelliGrid Architecture developed by the Electrical Power Research Institute (EPRI), as a means to implement the "IntelliGrid vision" of the automated, self-healing, and efficient power system of the future. The IntelliGrid methodology is a subset of the science of systems engineering. Systems engineering methodology separates the concepts of "user requirements" from "technical specifications": user requirements define "what" is needed without reference to any specific designs or technologies, while technical specifications define "how" to implement the automation systems in order to meet the user requirements.

This technical report outlines the way in which electricity is now described as a product. Particularly, in Europe and several other areas, for example Brazil and Argentina, as well as in some states in the United States of America. It is, however, rather a unique product because of its intangible and transient nature. Strictly, it is a product that exists only for an instant at a given point of delivery, comes into existence at the same instant at which it is being used and is replaced immediately by a new product with rather different characteristics. Its characteristics are different at each separate point of delivery. Moreover, it is a product whose quality depends not only on the elements that go into its production, but also in the way in which it is being used at any instant by the equipment of multiple users. Therefore, the quality control that is possible for more tangible and concrete products is not applicable in the case of electricity. All that can be attempted is some control of the conditions under which it is produced, transmitted and distributed and those under which it is used. In particular, the capacity of utilisation equipment to impinge on the quality of electricity, including that delivered to other equipment, must be recognized. Electrical equipment has become increasingly complex in terms of the functions it fulfils and the way in which it interacts with other electrical equipment. Frequently, that interaction takes place through the medium of the electricity network, which is the common energy source for all the equipment. It arises because the network, intended to be a common energy source, also provides a conducting path interlinking all equipment. In effect, the electromagnetic phenomena arising from the behaviour of utilisation equipment are superimposed on the other characteristics of the electricity supply, and become part of the product that is delivered to the system user. They are joined also by phenomena arising from atmospheric and other external events and from the intrinsic response of a large electricity system to such events.

IEC 60050-617:2009 has been published as a consequence of deregulation of the electricity market, it appeared necessary to establish a common glossary with those terms defining actors in the market, interface between actors and the technical or financial terms having a specific meaning in the context of electricity market. This horizontal standard IEC 60050-617:2009 is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 108. One of the responsibilities of a technical committee is, wherever applicable, to make use of horizontal standards in the preparation of its publications. The contents of this horizontal standard will not apply unless specifically referred to or included in the relevant publications. The content of 60050-617 is freely available at http://www.electropedia.org/. Electropedia (also known as the 'IEV Online') is the world's most comprehensive online electrical and electronic terminology database containing more than 20 000 terms and definitions

EN following parallel vote

EN following parallel vote

EN following parallel vote

Končni privzem v novem projektu, glej relacije.

These Parameter Lists to Functional Specifications describe specific functional requirements for HVDC Grid Systems. The terminology "HVDC Grid Systems" is used here describing HVDC systems for power transmission having more than two converter stations connected to a common DC circuit.
While this document focuses on requirements, that are specific for HVDC Grid Systems, some requirements are considered applicable to all HVDC systems in general, i.e. including point-to-point HVDC systems. Existing IEC, Cigré or other documents relevant have been used for reference as far as possible.
Corresponding to electric power transmission applications, this document is applicable to high voltage systems, i.e. .only nominal d.c. voltages equal or higher than 50 kV with respect to ground are considered in this document.
Note: While the physical principles of d.c. networks are basically voltage independent, the technical options for designing equipment get much wider with lower d.c. voltage levels, e.g. in case of converters or switchgear.
This Part 2 will have to be read in conjunction with Part 1 “Guidelines” for which an additional New Work Item Proposal is launched in parallel.

These Guidelines to Functional Specifications describe specific functional requirements for HVDC Grid Systems. The terminology "HVDC Grid Systems" is used here describing HVDC systems for power transmission having more than two converter stations connected to a common DC circuit.
While this document focuses on requirements, that are specific for HVDC Grid Systems, some requirements are considered applicable to all HVDC systems in general, i.e. including point-to-point HVDC systems. Existing IEC, Cigré or other documents relevant have been used for reference as far as possible.
Corresponding to electric power transmission applications, this document is applicable to high voltage systems, i.e. .only nominal d.c. voltages equal or higher than 50 kV with respect to ground are considered in this document.
Note: While the physical principles of d.c. networks are basically voltage independent, the technical options for designing equipment get much wider with lower d.c. voltage levels, e.g. in case of converters or switchgear.
This Part 1 will have to be read in conjunction with Part 2 “Parameter List” for which an additional New Work Item Proposal is launched in parallel.

EN following parallel vote * Supersedes HD 533 S1:1991

This European Standard specifies technical requirements for connection and operation of fixed installed micro-generators and their protection devices, irrespective of the micro-generators primary source of energy, in parallel with public low-voltage distribution networks, where micro-generation refers to equipment rated up to and including 16 A per phase, single or multi phase 230/400 V or multi phase 230 V (phase-to-phase voltage). This European Standard is intended for installation mainly in the domestic market.

EN following parallel vote

Implementation dates changed

60 BT decision: Memorandum 14 adopted * 62 BT decision: Informative annex to indicate which countries cannot endorse HD * Corrigendum to HD issued February 2002 * D127/092: CCL/TC 8X feeback regarding D125/051 endorsed (no need to reduce the voltage tolerance, which represents a consensus for more than 20 years)

This European Standard defines, describes and specifies the main characteristics of the voltage at a network user's supply terminals in public low voltage and medium voltage electricity distribution networks under normal operating conditions. This standard describes the limits or values within which the voltage characteristics can be expected to remain over the whole of the public distribution network and does not describe the average situation usually experienced by an individual network user.

Gives a table of standard frequencies up to 10 000 Hz.[
][
]Has the status of a basic publication in accordance with IEC Guide 108.

Specifies procedures for calculation of the prospective short-circuit currents with an unbalanced short circuit in high-voltage three-phase a.c. systems operating at nominal frequency 50 Hz or 60 Hz, i.e.

a.c. transmission, distribution and utilization systems and equipment for use in such systems with standard frequencies 50 Hz and 60 Hz having a nominal voltage above 100 V; a.c. and d.c. traction systems; a.c. and d.c. equipment having nominal voltages below 120 V a.c. or below 750 V d.c., the a.c. voltages being intended (but not exclusively) for 50 Hz and 60 Hz applications; such equipment covers batteries (from primary or secondary cells), other power supply devices (a.c. or d.c.), electrical equipment (including industrial and communication), and appliances.[
]Has the status of a basic publication in accordance with IEC Guide 108[
]This consolidated version consists of the sixth edition (1993), its amendment 1 (1994) and its amendment 2 (1997). Therefore, no   need to order amendments in addition to this publication.

Gives standard current ratings in the range 1 A to 200 000 A.       [
][
]Has the status of a basic publication in accordance with IEC Guide 108.