SIST-V CLC Guide 24:2010
(Main)Electromagnetic Compatibility (EMC) Standardization for Product Committees concerned with apparatus
- Abstract
No scope available.
- Status
- Published
- Publication Date
- 10-Mar-2010
- Technical Committee
- EMC - Electromagnetic compatibility
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 25-Jan-2010
- Due Date
- 01-Apr-2010
- Completion Date
- 11-Mar-2010
SIST-V CLC Guide 24:2010 is the Slovenian adoption of CLC Guide 24:2009 from CENELEC, published for EMC standardization work on apparatus. It explains how to structure electromagnetic compatibility (EMC) standards for product committees, including how basic, generic and product EMC standards relate, and how product-family or dedicated product standards should be drafted for emission and immunity.
What does SIST-V CLC Guide 24:2010 specify?
SIST-V CLC Guide 24:2010 gives guidance for preparing EMC standards for apparatus and for using the different kinds of EMC standards in conformity work. The guide focuses on standardization practice, not on certifying products, and it is aimed especially at product-oriented committees working on immunity.
The document is organized into three main clauses and four annexes:
| Part | What it covers |
|---|---|
| Clause 1 | Purpose of the guide and its intended users |
| Clause 2 | Characteristics of basic, generic and product EMC standards |
| Clause 3 | How to formulate product-family and dedicated product EMC standards |
| Annex A | List of generic and basic EMC standards |
| Annex B | Definitions |
| Annex C | Guideline tables for comparing generic and product standards |
| Annex D | Annex ZZ templates for harmonised standards |
In practice, the guide helps committees decide which type of EMC standard to write, what to reference instead of repeating test details, and how to align product standards with the EMC Directive approach used in Europe.
What are the key requirements of SIST-V CLC Guide 24:2010?
SIST-V CLC Guide 24:2010 sets out a hierarchy for EMC standards and gives drafting rules for product standards. The main message is that product standards should build on basic standards, stay aligned with generic standards unless there is a justified reason not to, and define test conditions and performance criteria clearly enough for reproducible assessment.
1. Use the right type of EMC standard for the task
Clause 2 distinguishes basic standards, generic standards and product standards. Basic standards provide measurement and test methods; generic standards give limits and test applicability for broad environments; product standards apply to a defined product or product family.
In practice, this means a committee should not put detailed measurement methods into every new product standard if a basic standard already covers them.
2. Keep basic standards technical, not evaluative
Clause 2.1 says basic EMC standards for tests and measurements define the phenomenon, the test method, the instrumentation and the test set-up, but not product limits or detailed performance criteria.
For readers, that means a basic standard is the shared test toolbox. It is the document labs use to run the method, while product or generic standards decide what level is acceptable.
3. Use generic standards when no product standard fits
Clause 2.2 says generic standards define precise EMC requirements, including limits, for products used in a given environment. They are intended for use when no corresponding product standard exists or is needed.
That matters because a buyer or engineer can use the generic standard as the default EMC benchmark for a product in residential, commercial, light industrial or industrial use.
4. Let product-family standards override generic standards when justified
Clause 2.3.1 says product-family standards define the EMC requirements and tests for the product family they cover, and they take precedence over generic standards for the EMC domains they address.
In practice, this allows a committee to set more specific criteria where the functional behavior of the product family makes the generic approach too broad. Any deviation from generic standards needs a clear justification.
5. Treat dedicated product standards as product-specific versions of the same approach
Clause 2.3.2 applies the same principles to dedicated product EMC standards. These are often embedded in general-purpose product standards, but the EMC clauses should be clearly separated and identified.
This matters for users because EMC requirements should remain easy to find and assess even when they are written inside a broader product standard.
6. Cover both immunity and emission phenomena explicitly
Clause 3.1 lists the immunity phenomena to consider across conducted low frequency, radiated low frequency, conducted high frequency, radiated high frequency and electrostatic discharge (ESD). Clause 3.2 lists the emission phenomena that have been used for limits, such as power supply harmonic currents, voltage fluctuations and radio-interference.
For practice, this gives committees a checklist of what may need to be addressed so that a standard does not omit a relevant EMC disturbance mechanism.
7. Reference existing standards instead of repeating methods
Clause 3.3 says product EMC standards should refer to basic EMC standards wherever possible, define test arrangements and limits for emission, and define test levels and performance criteria for immunity.
This reduces duplication and keeps standards consistent. It also helps test labs follow one common method set instead of interpreting different rewritten versions.
8. Justify deviations and avoid non-technical rulemaking
Clause 3.3.1 says deviations from generic standards must be fully justified and explained, preferably in the introduction or an informative annex. It also says standards should avoid legal, sales, sanctions, dispute-resolution and date-of-application statements.
For users, that means the document stays technical. A product committee can vary a requirement, but only if it explains why the product, environment or phenomenon makes the change necessary.
What terms does SIST-V CLC Guide 24:2010 define?
- Electromagnetic compatibility (EMC) - The ability of equipment or systems to work properly in their electromagnetic environment without creating intolerable disturbances for other things in that environment.
- Electromagnetic interference (EMI) - The performance degradation caused by an electromagnetic disturbance.
- Electromagnetic disturbance - Any electromagnetic phenomenon that can degrade performance or affect living or inert matter.
- Emission - The phenomenon by which electromagnetic energy leaves a source.
- Immunity - The ability of equipment to keep performing without degradation when an electromagnetic disturbance is present.
- Port - The interface through which equipment connects with or is affected by the external electromagnetic environment.
- High frequency - Frequency above 9 kHz.
- Low frequency - Frequency up to and including 9 kHz.
Who uses SIST-V CLC Guide 24:2010?
SIST-V CLC Guide 24:2010 is mainly used by product-oriented standardization committees writing EMC clauses for apparatus. It is also relevant to CENELEC TC 210 and its coordination work, because the guide describes how product standards should stay coherent with generic and basic EMC standards.
In practice, it is useful for:
- standards writers drafting EMC clauses for product-family or dedicated product standards
- EMC specialists choosing test phenomena, limits and performance criteria
- manufacturers preparing product compliance requirements and user instructions
- test laboratories planning reproducible immunity and emission tests
- quality managers and buyers checking whether a product standard is specific enough for a given apparatus
What changed in SIST-V CLC Guide 24:2010 from the previous edition?
SIST-V CLC Guide 24:2010 is the third edition of the guide and supersedes CENELEC Guide 24:2005. The Slovenian standard is identical to CLC Guide 24:2009.
Which standards are used with SIST-V CLC Guide 24:2010?
The guide recommends reading it together with IEC Guide 107:2009, which it names as the guide for drafting EMC publications. Annex A and the body of the guide also rely on the established IEC and EN EMC family structure.
Key companion standards named in the guide include:
| Standard or group | What it contributes |
|---|---|
| EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4 | Generic EMC standards for residential/commercial/light industrial and industrial environments |
| EN 61000-4-2 to EN 61000-4-29 | Basic immunity test and measurement standards for phenomena such as ESD, radiated RF fields, surges, dips and interruptions |
| EN 61000-3-2, EN 61000-3-3, EN 61000-3-11, EN 61000-3-12 | Emission standards for harmonics and voltage fluctuations on mains supplies |
| EN 50065 series, EN 55011, EN 55014-1, EN 55016 | References for signalling and radio-interference measurement and emission methods |
| IEC 61000-4-1 / EN 61000-4-1 | Overview information on the applicability of basic EMC tests |
What does the SIST-V CLC Guide 24:2010 document contain?
The guide contains a structured explanation of EMC standard types, then guidance on how to draft product-family and dedicated product EMC standards. It also includes a list of generic and basic standards, a set of definitions, and a comparison table for checking whether a product standard aligns with generic emission and immunity requirements.
Annex C is practical for drafting and review work because it gives evaluation tables for emission and immunity alignment. Annex D provides Annex ZZ templates for harmonised standards, so committees can prepare texts linked to the EMC Directive in the expected format.
The document also includes a figure showing example equipment ports, and the clauses describe which electromagnetic phenomena should be considered for immunity and emission.
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SIST-V CLC Guide 24:2010 is a guide published by the Slovenian Institute for Standardization (SIST). Its full title is "Electromagnetic Compatibility (EMC) Standardization for Product Committees concerned with apparatus". This standard covers: No scope available.
No scope available.
SIST-V CLC Guide 24:2010 is classified under the following ICS (International Classification for Standards) categories: 01.120 - Standardization. General rules; 33.100.01 - Electromagnetic compatibility in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST-V CLC Guide 24:2010 has the following relationships with other standards: It is inter standard links to SIST-V CLC Guide 34:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST-V CLC Guide 24:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2010
6WDQGDUGL]DFLMDQDSRGURþMXHOHNWURPDJQHWQH]GUXåOMLYRVWL (0& ]DSURGXNWQH
WHKQLþQHRGERUHNLVHXNYDUMDMR]QDSUDYDPL
Electromagnetic Compatibility (EMC) Standardization for Product Committees concerned
with apparatus
Ta slovenski standard je istoveten z: CLC Guide 24:2009
ICS:
01.120 Standardizacija. Splošna Standardization. General
pravila rules
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CENELEC Guide 24
Electromagnetic Compatibility (EMC)
Standardization for Product Committees
concerned with apparatus
This third edition of CENELEC Guide 24, prepared by CENELEC Technical Committee TC 210,
Electromagnetic Compatibility (EMC), was approved by the CENELEC Technical Board by
correspondence on 2009-07-01.
Edition 3 / December 2009
Avenue Marnix, 17
B - 1000 Brussels
Tel.: + 32 2 519 68 71
Fax: + 32 2 519 69 19
www.cenelec.eu
Electromagnetic Compatibility (EMC) Standardization CENELEC Guide 24
for Product Committees concerned with apparatus
Foreword
This CENELEC Guide has been prepared by CENELEC Technical Committee TC 210, EMC.
This third edition was approved by the CENELEC Technical Board on 2009-07-01; it
supersedes CENELEC Guide 24:2005.
CENELEC members are the national electrotechnical committees of Austria, Belgium,
Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands,
Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the
United Kingdom.
Edition 3 / December 2009 3
CENELEC Guide 24 Electromagnetic Compatibility (EMC) Standardization
for Product Committees concerned with apparatus
CONTENTS
1 Purpose . 6
2 Characteristics of EMC standards . 6
2.1 Basic EMC standards . 6
2.2 Generic EMC standards . 7
2.3 Product EMC standards . 8
2.3.1 Product-family EMC standards (*) . 8
2.3.2 Dedicated product EMC standards . 9
3 Formulation of product (family) EMC standards . 10
3.1 Electromagnetic phenomena for immunity . 10
3.1.1 Conducted low frequency phenomena . 10
3.1.2 Radiated low frequency field phenomena . 11
3.1.3 Conducted high frequency phenomena . 11
3.1.4 Radiated high frequency field phenomena . 11
3.1.5 Electrostatic discharge phenomena (ESD) . 11
3.2 Electromagnetic phenomena for emission . 11
3.3 Drafting of a Product EMC standard . 12
3.3.1 General . 12
3.3.2 Special points to be considered . 13
3.3.3 Reference to other standards . 13
3.4 Coordinating role of CENELEC TC 210 for product EMC standards . 14
Annex A List of generic and basic EMC standards . 15
Annex B Definitions . 17
Annex C Guideline table for comparing generic and product standards . 19
Annex D Annexes ZZ . 23
4 Edition 3 / December 2009
Electromagnetic Compatibility (EMC) Standardization CENELEC Guide 24
for Product Committees concerned with apparatus
INTRODUCTION
The Council of the European Communities has adopted the Directive 2004/108/EC (the EMC
Directive) concerning Electromagnetic Compatibility (EMC). The Directive concerns both
immunity and emission over the whole frequency range.
The European Commission has given CEN, CENELEC and ETSI the task of preparing and
harmonising the necessary standards for the implementation of this directive.
These standards are necessary to enable the presumption of conformity with the protection
requirements of the EMC Directive set out in Annex I, Article 1 and are designed to satisfy
those protection requirements. Conformance to the appropriate standards will facilitate the
free movement of apparatus placed on the market within the European Economic Area
(EEA).
Generic EMC standards (or product standards i.e. product-family, or dedicated product
standards where appropriate) define the emission and immunity test requirements presumed
to satisfy the protection requirements of the EMC Directive.
It is recommended that this CENELEC Guide be read in conjunction with
IEC Guide 107:2009 ”Electromagnetic compatibility - Guide to the drafting of electromagnetic
compatibility publications”.
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CENELEC Guide 24 Electromagnetic Compatibility (EMC) Standardization
for Product Committees concerned with apparatus
1 Purpose
The purpose of this Guide is to
– advise on the application of the generic and basic EMC standards,
– advise on the preparation of product i.e. product-family or dedicated product EMC
standards.
It should be noted that certification (*) aspects are not considered in this Guide.
This Guide is primarily intended for product-oriented committees preparing EMC standards,
especially in the field of immunity.
(*) NOTE Certification (of conformity) is the action by a third party demonstrating that adequate confidence is
provided that a duly identified product, process or service is in conformity with a standard or with other normative
documents.
2 Characteristics of EMC standards
To fulfil the tasks related to meeting the requirements of the EMC Directive, it is essential to
be able to distinguish between the three following types of EMC standards:
a) basic standards,
b) generic standards,
c) product standards (including product-family standards and dedicated product standards).
The following subclauses define (as precisely as practicable) the characteristics of these
different types of standards. A list of basic and generic standards is given in Annex A.
In addition to the above types of standards, there is a need for a further category of
documents including guidance documents, codes of practice, etc.
Table 1 gives an overview of the characteristics of the different types of standards.
2.1 Basic EMC standards
Two types of basic EMC standards have been identified:
– those for tests and measurements;
– those related to other aspects.
Basic standards for test and measurement are of particular importance in connection with
generic and product standards for conformity assessment purposes.
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a) Basic standards for emission and immunity tests and measurements
Contents
These standards give (often separately for each disturbing phenomenon) a definition
and description of the phenomenon, detailed test and measurement methods, test
instrumentation and basic test set up.
Ranges of test levels (immunity) may be given with respect to the characteristics of
measuring equipment or measuring methods.
These standards shall not include prescribed limits and shall not contain detailed
performance criteria.
Aims and use
These standards constitute the foundation of EMC-standardisation by defining the
detailed test and measurement methods.
It is intended that generic and product (- family) standards should make reference to the
basic standards without repeating their detailed contents. As such, a declaration of
conformity of products with the basic standards has no significance and therefore basic
standards are not included in the list of harmonised standards published in the Official
Journal of the European Union (OJEU). This OJEU list will indeed include only those
standards permitting the direct presumption of conformity of products with Directive
2004/108/EC.
b) Other types of basic standards and documents
Other types of EMC standards and publications relating to other aspects may be
identified as ‘basic’, in as much as they describe the fundamental elements of EMC. For
example, they may concern:
– guidelines on mitigation measures, e.g. IEC 61000-5-1 (Technical Report Type 3).
– description and classification of environment, possibly including ranges of
environmental and/or compatibility levels, thus constituting an important basis for
establishing emission limits and immunity test levels, e.g. IEC 61000-2-5 (still
described by IEC as a “Technical Report Type 2”, although this type of publication
no longer exists).
2.2 Generic EMC standards
Contents
These standards for emission and immunity define a set of precise EMC requirements
(including limits) and indicate which standardised tests are applicable to those products
intended to be used in a given environment.
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CENELEC Guide 24 Electromagnetic Compatibility (EMC) Standardization
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It is intended that generic standards should not include detailed test and measurement
methods or test instrumentation but refer for that purpose to basic standards. Generic
standards may contain, when necessary, additional information (e.g. choice of one method
where several are included in a basic standard).
Generic immunity standards specify a limited number of essential tests, with the objective of
achieving a technical/economical optimum, thus avoiding over specifying test requirements.
This selection is very critical.
These limited test requirements for conformity with the EMC Directive do not preclude that
equipment must be designed to operate normally in its intended EMC environment for all
disturbing phenomena specified within this environment.
Generic immunity standards also include those performance criteria of general application
which are associated with specific test levels.
Aims and use
The generic standards should be used when no corresponding product standards exist or are
deemed necessary.
In addition, generic standards play an essential role in the co-ordination of product
standards.
2.3 Product EMC standards
2.3.1 Product-family EMC standards (*)
Contents
The scopes of such standards indicate the particular product-family concerned; these may be
broad or narrow.
Product-family standards define specific EMC requirements (immunity and emission) and
precise tests for the products within their scopes.
(*) NOTE A product-family covers products with differing detailed functions, but having some common general
characteristics. The borderline with dedicated products may sometimes be imprecise as families may be very
broad or narrow.
It is intended that
– product-family standards should not normally include detailed measurement methods or
test instrumentation, but give reference to basic standards. In exceptional and justified
cases, specific test methods or deviations from the tests in the basic standards may be
necessary;
– product-family standards include all necessary additional information for the reproducible
testing of those products;
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– the tests and limits in product-family standards should be co-ordinated with those in the
generic standards. Where deviations are necessary, they shall be fully justified (**) and
the rationale shall be indicated, preferably within the product-family standards.
Deviations may concern the phenomena considered, additional tests or test levels.
(**) NOTE CENELEC TC 210 in their overall EMC co-ordination role should be given the opportunity to
comment on the proposed justification prior to the finalisation of the standard.
– product-family standards include more specific and detailed performance criteria than
generic standards.
Aims and use
For assessment of compliance with the EMC Directive, product-family standards take
precedence over generic standards, either partially or totally according to the EMC domains
covered.
It is recommended that an EMC product-family standard forms a separate publication, except
when EMC requirements are of such a simple nature that they may be introduced in a
product-family standard covering the performance characteristics. In this case the EMC
clauses shall be clearly separated and identified.
In safety standards EMC clauses not directly related to safety should preferably not be
included.
2.3.2 Dedicated product EMC standards
The same criteria as defined for product-family standards apply. However EMC
requirements, instead of constituting separate standards, are frequently included within the
general-purpose (performance characteristics) standards dedicated to those specific
(dedicated) products. EMC clauses within these general-purpose standards shall be
separated and shall be clearly identified. However, having separate EMC standards is to be
preferred.
Regarding emission requirements: when a particular product is covered by a product-family
standard, the preparation of a dedicated product standard is seldom justified. Deviations from
the specified emission limits will be allowed only in exceptional cases, such as where a
particular environment allows an increase. CENELEC TC 210 in its co-ordination role will
consider any proposed deviations.
Product specific functional characteristics have to be taken into consideration when
determining the product's immunity requirements. Dedicated product EMC standards or
clauses shall give precise performance criteria.
These product standards are therefore in some cases justifiably different from product-family
and generic standards; however they should remain coordinated with them.
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CENELEC Guide 24 Electromagnetic Compatibility (EMC) Standardization
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Table 1 – Structure of standards
Type Contents Aims
a
Basic - Measurement and test methods - Reference documents
- Instrumentation - No conformance testing of products
(Not published in the OJEU list)
- Test set-up
- Ranges of test levels (immunity)
- No limits/No performance criteria
Generic - Precise and essential requirements - Conformance testing of products
(limits) for all products intended for use (Published in the OJEU list)
in each environment i.e. residential,
- Co-ordination tool for product (family)
commercial, light industry and industry
standards
- Refer to basic standards for
measurement/test methods (no
repetition)
- General performance criteria
Product-
- EMC requirements for product-families - Conformance testing of products
family (Published in the OJEU list)
- More detailed performance criteria
- Precedence over generic standards
- Specific test set-up etc.
but to be co-ordinated with them
- Refer to basic standards for
measurements/tests (no repetition)
Dedicated - Same as for product-family but more - Same as for product-family but more
product specific. specific.
- Generally not needed for emission
a
Refers to basic standards for tests and measurements. There are other types of basic EMC standards (see
2.1.b).
3 Formulation of product (family) EMC standards
3.1 Electromagnetic phenomena for immunity
3.1.1 Conducted low frequency phenomena
– slow variations of the supply voltage;
– harmonics, inter-harmonics;
– signalling on the mains supply;
– voltage fluctuations;
– voltage dips and interruptions;
– voltage unbalance;
– power frequency variations;
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– induced low frequency voltages;
– DC current or voltage in AC networks.
3.1.2 Radiated low frequency field phenomena
– magnetic fields (*);
– electric fields (*).
(*) NOTE Continuous or transient.
3.1.3 Conducted high frequency phenomena
– induced continuous wave voltages or currents;
– unidirectional transients (**);
– oscillatory transients (**).
(**) NOTE Single or repetitive.
3.1.4 Radiated high frequency field phenomena
– magnetic fields;
– electric fields;
– electromagnetic fields:
– continuous waves,
– transients (**).
(**) NOTE Single or repetitive.
3.1.5 Electrostatic discharge phenomena (ESD)
3.2 Electromagnetic phenomena for emission
In principle, the same phenomena exist as listed in 3.1, but until now, emission limits in
product families have been applied only to the following phenomena or effects:
– power supply harmonic currents;
– power supply currents resulting in voltage fluctuations;
– radio-interference (power supply, radiation, signalling wires, etc.);
– audio-frequency magnetic fields in special cases.
NOTE Radio-interference emission limits may provide an indirect limitation of transients.
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In future other phenomena may be considered under emission limits, none are presently
foreseen.
3.3 Drafting of a Product EMC standard
3.3.1 General
A product EMC Standard should, to the maximum possible extent, align with the applicable
generic EMC Standards; if not, all deviations from the generic EMC standards shall be fully
justified and the rationale shall be given, e.g. in a separate document or, preferably, in the
introduction of the standard or in an informative annex to it.
NOTE 1 Dedicated product standards have the same criteria as defined for product-family standards. See 2.3.2.
A product EMC standard should preferably make reference to basic EMC standards, and
should define test arrangements and limits for emission tests, and test levels and specific
performance criteria for immunity tests.
Alternative test and measurement methods for the same purpose are acceptable provided
they give an adequate provision of presumption of conformity with the protection
requirements.
NOTE 2 In addition it will probably be necessary to indicate how to apply the standard to the product (specific
test set-up and procedure if needed).
New tests, which are not defined in the basic EMC standards, should be avoided as far as possible.
Product EMC standards can, for example, be created for the following reasons:
a) specific functional requirements, in particular for performance;
b) specific environments;
c) phenomena not considered in the generic standards.
Standards may include requirements (including we
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