SIST EN 55011:2016

SLOVENSKI STANDARD
01-junij-2016
1DGRPHãþD
SIST EN 55011:2010
SIST EN 55011:2010/A1:2010
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Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics
- Limits and methods of measurement
Industrielle, wissenschaftliche und medizinische Geräte - Funkstörungen - Grenzwerte
und Messverfahren
Appareils industriels, scientifiques et médicaux - Caractéristiques de perturbations
radioélectriques - Limites et méthodes de mesure
Ta slovenski standard je istoveten z: EN 55011:2016
ICS:
33.100.10 Emisija Emission
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 55011
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2016
ICS 33.100.10 Supersedes EN 55011:2009
English Version
Industrial, scientific and medical equipment -
Radio-frequency disturbance characteristics -
Limits and methods of measurement
(CISPR 11:2015 , modified)
Appareils industriels, scientifiques et médicaux - Industrielle, wissenschaftliche und medizinische Geräte -
Caractéristiques de perturbations radioélectriques - Funkstörungen - Grenzwerte und Messverfahren
Limites et méthodes de mesure (CISPR 11:2015 , modifiziert)
(CISPR 11:2015 , modifiée)
This European Standard was approved by CENELEC on 2016-02-15. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 55011:2016 E
Contents Page
European foreword .3
Annex ZA (normative) Normative references to international publications with their
corresponding European publications .5
Annex ZB (normative) Frequencies designated on a national basis in CENELEC countries for
use as fundamental ISM frequencies .7
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives .8
Bibliography .9

European foreword
The text of document CISPR/B/628/FDIS, future edition 6 of CISPR 11, prepared by CISPR SC B
"Interference relating to industrial, scientific and medical radio-frequency apparatus, to other (heavy)
industrial equipment, to overhead power lines, to high voltage equipment and to electric traction" of
CISPR "International special committee on radio interference" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 55011:2016.
A draft amendment, which covers common modifications to CISPR 11:2015 (CISPR/B/628/FDIS), was
prepared by CLC/TC 210," Electromagnetic Compatibility (EMC)" and approved by CENELEC.
The following dates are fixed:
(dop) 2017-02-15
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2019-02-15
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 55011:2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Clauses, subclauses, notes, tables, figures and annexes which are additional to those in
CISPR 11:2015 are prefixed “Z”.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s), see informative Annex ZZ, which is an integral part of this
document.
Endorsement notice
The text of the International Standard CISPR 11:2015 was approved by CENELEC as a European
Standard with agreed common modifications.
COMMON MODIFICATIONS
4 Frequencies designated for ISM use
Replace Clause 4 by the following:
4 National measures and frequencies designated for ISM use
Certain frequencies are designated by the International Telecommunication Union (ITU) for use as
fundamental frequencies for ISM RF applications (see also definition 3.13). These frequencies are
listed in Table 1.
Table 1 – Frequencies in the radio-frequency (RF) range designated by ITU
for use as fundamental ISM frequencies
Number of appropriate footnote
Centre frequency Frequency range
Maximum to the table of frequency
b
radiation limit allocation of the ITU Radio
MHz MHz
a
Regulations
6,780 6,765 – 6,795 Under consideration 5.138
13,560 13,553 – 13,567 Unrestricted 5.150
27,120 26,957 – 27,283 Unrestricted 5.150
40,680 40,66 – 40,70 Unrestricted 5.150
433,920 433,05 – 434,79 Under consideration 5.138 in Region 1, except
countries mentioned in 5.280
915,000 902 – 928 Unrestricted 5.150 in Region 2 only
2 450 2 400 – 2 500 Unrestricted 5.150
5 800 5 725 – 5 875 Unrestricted 5.150
24 125 24 000 – 24 250 Unrestricted 5.150
61 250 61 000 – 61 500 Under consideration 5.138
122 500 122 000 – 123 000 Under consideration 5.138
245 000 244 000 – 246 000 Under consideration 5.138
a
Resolution No. 63 of the ITU Radio Regulations applies.

b
The term “unrestricted” applies to the fundamental and all other frequency components falling within the designated
band. Outside of ITU designated ISM bands the limits for the disturbance voltage and radiation disturbance in this
standard apply.
In some CENELEC countries, different or additional frequencies may be designated for use with
ISM RF applications in the meaning of the definition found in the ITU Radio Regulations, see
definition 3.13. These frequencies are listed in Table ZB.1 (see Annex ZB).
The limits for the disturbance voltage and radiation disturbance defined in this standard do also not
apply to the fundamental ISM frequencies listed in Table ZB.1. If ISM RF applications use fundamental
frequencies other than the ITU or nationally designated frequencies, then the limits for the disturbance
voltage and radiation disturbance of this standard apply also to these fundamental frequencies.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
CISPR 16-1-1 2010 Specification for radio disturbance and EN 55016-1-1 2010
immunity measuring apparatus and
+ A1 2010 + A1 2010
methods -
Part 1-1: Radio disturbance and
+ A2 2014 + A2 2014
immunity measuring apparatus -
Measuring apparatus
CISPR 16-1-2 2014 Specification for radio disturbance and EN 55016-1-2 2014
immunity measuring apparatus and
methods -
Part 1-2: Radio disturbance and
immunity measuring apparatus -
Coupling devices for conducted
disturbance measurements
CISPR 16-1-4 2010 Specification for radio disturbance and EN 55016-1-4 2010
immunity measuring apparatus and
+ A1 2012 + A1 2012
methods -
Part 1-4: Radio disturbance and
immunity measuring apparatus -
Antennas and test sites for radiated
disturbance measurements
CISPR 16-2-1 2014 Specification for radio disturbance and EN 55016-2-1 2014
immunity measuring apparatus and
methods -
Part 2-1: Methods of measurement of
disturbances and immunity - Conducted
disturbance measurements
CISPR 16-2-3 2010 Specification for radio disturbance and EN 55016-2-3 2010
immunity measuring apparatus and
- -  + AC 2013
methods -
Part 2-3: Methods of measurement of
+ A1 2010 + A1 2010
disturbances and immunity - Radiated
+ A2 2014 + A2 2014
disturbance measurements
Publication Year Title EN/HD Year
CISPR 16-4-2 2011 Specification for radio disturbance and EN 55016-4-2 2011
immunity measuring apparatus and
+ A1 2014 + A1 2014
methods -
Part 4-2: Uncertainties, statistics and
limit modelling - Measurement
instrumentation uncertainty
IEC 60050-161 1990 International Electrotechnical - -
Vocabulary (IEV) -
Chapter 161: Electromagnetic
compatibility
IEC 60601-1-2 2014 Medical electrical equipment - EN 60601-1-2 2015
Part 1-2: General requirements for basic
safety and essential performance -
Collateral standard: Electromagnetic
disturbances - Requirements and tests
IEC 60601-2-2 2009 Medical electrical equipment - EN 60601-2-2 2009
Part 2-2: Particular requirements for the
- -  + A11 2011
basic safety and essential performance
of high frequency surgical equipment
and high frequency surgical accessories
IEC 60974-10 2014 Arc welding equipment - EN 60974-10 2014
Part 10: Electromagnetic compatibility
(EMC) requirements
IEC 61307 2011 Industrial microwave heating EN 61307 2011
installations - Test methods for the
determination of power output
IEC 62135-2 2007 Resistance welding equipment - EN 62135-2 2008
Part 2: Electromagnetic compatibility
(EMC) requirements
ITU Radio regulations, 2012 Radio Regulations - Volume 3: - -
Vol 3 Resolutions and Recommendations

Annex ZB
(normative)
Frequencies designated on a national basis in CENELEC countries
for use as fundamental ISM frequencies
Table ZB.1 — Frequencies designated on a national basis in CENELEC countries
for use as fundamental ISM frequencies
Frequency Maximum radiation limit Notes
MHz
0,009 - 0,010 not limited Germany only
a
83,996 - 84,004 not limited United Kingdom only
a
167,992 - 168,008 not limited United Kingdom only
a
886,000 - 906,000 not limited United Kingdom only
a
Radio communication services must accept harmful interference from ISM apparatus operating in accordance with the
WT (Control of Interference from RF Heating Apparatus) Regulations 1971. The WT (Control of Interference from RF
Heating Apparatus) Regulations 1971 specify the limits of levels of radiation permitted outside the ISM bands.

Annex ZZ
(informative)
Coverage of Essential Requirements of EU Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association, and within its scope the Standard covers only
the following essential requirements out of those given in Annex 1 of EC Directive 2004/108/EC.
Table ZZ.1 — Correspondence between this European Standard and Directive 2004/108/EC
Essential Requirements of Clauses and subclauses
Directive 2004/108/EC, Annex 1 of this EN
1(a) Clause 6 (Limits for electromagnetic
disturbances),
8.2 (Conducted disturbances (at power
ports)),
8.3 (Requirement for radiated
disturbances (9 kHz to 1 GHz)),
Clause 9 (Requirement for radiated
disturbances (1 GHz to 18 GHz))

Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EU Directives can be applied to the products falling within
the scope of this standard.
Bibliography
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
CISPR 14-1 NOTE Harmonized as EN 55014-1.
CISPR 15:2013 NOTE Harmonized as EN 55015:2013 (not modified).
IEC 60364-1 NOTE Harmonized as HD 60364-1.
IEC 60364-5-51:2005 NOTE Harmonized as HD 60364-5-51:2009 (modified) and
HD 60364-5-51:2009/A11:2013.
IEC 60705:2010 NOTE Harmonized as EN 60705:2012 (modified).
IEC 61308:2005 NOTE Harmonized as EN 61308:2006 (not modified).
IEC 61689:2013 NOTE Harmonized as EN 61689:2013 (not modified).
IEC 61922:2002 NOTE Harmonized as EN 61922:2002 (not modified).

CISPR 11 ®
Edition 6.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
INT ERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

C OMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

Industrial, scientific and medical equipment – Radio-frequency disturbance

characteristics – Limits and methods of measurement

Appareils industriels, scientifiques et médicaux – Caractéristiques de

perturbations radioélectriques – Limites et méthodes de mesure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10 ISBN 978-2-8322-2707-7

– 2 – CISPR 11:2015 © IEC 2015
CONTENTS
FOREWORD . 7
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
4 Frequencies designated for ISM use . 15
5 Classification of equipment . 16
5.1 Separation into groups . 16
5.2 Division into classes . 16
5.3 Documentation for the user . 16
6 Limits of electromagnetic disturbances . 17
6.1 General . 17
6.2 Group 1 equipment measured on a test site . 17
6.2.1 Limits for conducted disturbances . 17
6.2.2 Limits of electromagnetic radiation disturbance. 20
6.3 Group 2 equipment measured on a test site . 21
6.3.1 Limits for conducted disturbances . 21
6.3.2 Limits of electromagnetic radiation disturbance. 22
6.4 Group 1 and group 2 class A equipment measured in situ . 27
6.4.1 Limits for conducted disturbances . 27
6.4.2 Limits of electromagnetic radiation disturbance. 28
7 Measurement requirements . 30
7.1 General . 30
7.2 Ambient noise . 30
7.3 Measuring equipment . 31
7.3.1 Measuring instruments. 31
7.3.2 Artificial network (AN) . 31
7.3.3 Voltage probe . 32
7.3.4 Antennas . 32
7.3.5 Artificial hand . 33
7.4 Frequency measurement . 33
7.5 Configuration of equipment under test. 33
7.5.1 General . 33
7.5.2 Interconnecting cables . 36
7.5.3 Connection to the electricity supply network on a test site . 37
7.6 Load conditions of equipment under test . 39
7.6.1 General . 39
7.6.2 Medical equipment . 40
7.6.3 Industrial equipment . 41
7.6.4 Scientific, laboratory and measuring equipment . 41
7.6.5 Microwave cooking appliances . 42
7.6.6 Other equipment in the frequency range 1 GHz to 18 GHz . 42
7.6.7 Electric welding equipment . 42
7.6.8 ISM RF lighting equipment . 42
7.6.9 Medium voltage (MV) and high voltage (HV) switchgear . 42

CISPR 11:2015 © IEC 2015 – 3 –
7.6.10 Grid connected power converters . 42
7.7 Recording of test-site measurement results . 43
7.7.1 General . 43
7.7.2 Conducted emissions . 43
7.7.3 Radiated emissions . 43
8 Special provisions for test site measurements (9 kHz to 1 GHz) . 44
8.1 Ground planes . 44
8.2 Measurement of conducted disturbances . 44
8.2.1 General . 44
8.2.2 Measurements on grid connected power converters . 45
8.2.3 Handheld equipment which are normally operated without an earth
connection . 49
8.3 Radiation test site for 9 kHz to 1 GHz . 49
8.3.1 General . 49
8.3.2 Validation of the radiation test site (9 kHz to 1 GHz) . 50
8.3.3 Disposition of equipment under test (9 kHz to 1 GHz) . 50
8.3.4 Radiation measurements (9 kHz to 1 GHz) . 51
8.4 Alternative radiation test sites for the frequency range 30 MHz to 1 GHz . 51
9 Radiation measurements: 1 GHz to 18 GHz . 51
9.1 Test arrangement . 51
9.2 Receiving antenna . 51
9.3 Validation and calibration of test site . 51
9.4 Measuring procedure . 52
9.4.1 General . 52
9.4.2 Operating conditions of the EUT . 52
9.4.3 Preliminary measurement . 53
9.4.4 Final measurement . 53
10 Measurement in situ . 55
11 Safety precautions for emission measurements on ISM RF equipment . 55
12 Measurement uncertainty . 55
Annex A (informative) Examples of equipment classification . 56
Annex B (informative) Precautions to be taken in the use of a spectrum analyzer (see
7.3.1) . 58
Annex C (normative) Measurement of electromagnetic radiation disturbance in the
presence of signals from radio transmitters . 59
Annex D (informative) Propagation of interference from industrial radio-frequency
equipment at frequencies between 30 MHz and 300 MHz . 60
Annex E (informative) Recommendations of CISPR for protection of certain radio
services in particular areas . 61
E.1 General . 61
E.2 Recommendations for protection of safety-related radio services . 61
E.3 Recommendations for protection of specific sensitive radio services . 61
Annex F (informative) Frequency bands allocated for safety-related radio services . 62
Annex G (informative) Frequency bands allocated for sensitive radio services . 63
Annex H (informative) Statistical assessment of series produced equipment against
the requirements of CISPR standards . 65
H.1 Significance of a CISPR limit . 65
H.2 Type tests . 65

– 4 – CISPR 11:2015 © IEC 2015
H.3 Statistical assessment of series produced equipment . 65
H.3.1 Assessment based on a general margin to the limit . 65
H.3.2 Assessment based on the non-central t-distribution . 66
H.3.3 Assessment based on the binomial distribution . 68
H.3.4 Equipment produced on an individual basis . 68
Annex I (normative) Artificial Network (AN) for the assessment of disturbance
voltages at d.c. power ports of semiconductor power converters . 69
I.1 General information and purpose . 69
I.2 Structures for a DC-AN . 69
I.2.1 AN suitable for measurement of unsymmetrical mode (UM) disturbances . 69
I.2.2 AN suitable for measurement of common mode (CM) and differential
mode (DM) disturbances . 69
I.2.3 AN suitable for measurement of UM, CM and DM disturbances . 70
I.3 Employment of DC-ANs for compliance measurements . 70
I.3.1 General . 70
I.3.2 Pseudo V-AN . 70
I.3.3 Delta-AN . 70
I.4 Normative technical requirements for the DC-AN . 71
I.4.1 Parameters and associated tolerances in the range 150 kHz to 30 MHz . 71
I.4.2 Parameters and associated tolerances in the range 9 kHz to 150 kHz . 72
I.5 Examples of practical implementations of DC-ANs . 72
Annex J (informative) Measurements on Grid Connected Power Converters (GCPC) –
Setups for an effective test site configuration . 75
J.1 General information and purpose . 75
J.2 Setup of the test site . 75
J.2.1 Block diagram of test site . 75
J.2.2 DC power supply . 76
J.2.3 AC power source . 76
J.2.4 Other components . 77
J.3 Other test setups . 77
J.3.1 Configuration comprising laboratory AC power source and resistive load . 77
J.3.2 Configuration in case of reverse power flow to the AC mains . 78
Annex K (informative) Test site configuration and instrumentation – Guidance on
prevention of saturation effects in mitigation filters of transformer-less power
converters during type tests according to this standard. 80
K.1 General information and purpose . 80
K.2 Recommendations for avoidance of saturation effects in the range 9 kHz to
150 kHz . 81
K.3 Detailed advice . 81
K.3.1 General . 81
K.3.2 Insert of series inductors (or common mode chokes) in the laboratory's
d.c. power supply chain . 82
K.3.3 Employment of additional common mode decoupling capacitors at the
interface between the AE port of the DC-AN and the laboratory d.c.
power supply port allocated in the test environment . 83
K.4 Background information . 84
Bibliography . 86

Figure 1 – Circuit for disturbance voltage measurements on mains supply . 32
Figure 2 – Artificial hand, RC element . 33

CISPR 11:2015 © IEC 2015 – 5 –
Figure 3 – Example for a typical cable arrangement for measurements of radiated
disturbances in 3 m separation distance, Table-top EUT . 35
Figure 4 – Example for a typical test set up for measurement of conducted and/or
radiated disturbances from a floor standing EUT, 3D view . 36
Figure 5 – Disposition of medical (capacitive type) and dummy load . 40
Figure 6 – Typical arrangement for measurement of conducted disturbances at LV d.c.
power ports with the DC-AN used as termination and decoupling unit to the laboratory
d.c. power source . 46
Figure 7 – Typical arrangement for measurement of conducted disturbances at LV d.c.
power ports with the DC-AN used as termination and voltage probe . 47
Figure 8 – Typical arrangement for measurement of conducted disturbances at LV d.c.
power ports with the DC-AN used as voltage probe and with a current probe – 2D
diagram . 48
Figure 9 – Typical arrangement for measurement of conducted disturbances at LV d.c.
power ports with a DC-AN used as voltage probe and with a current probe – 3D
diagram . 48
Figure 10 – Test site . 50
Figure 11 – Minimum size of metal ground plane . 50
Figure 12 – Decision tree for the measurement of emissions from 1 GHz to 18 GHz of
group 2 equipment operating at frequencies above 400 MHz . 52
Figure H.1 – An example of possible difficulties . 68
Figure I.1 – Practical implementation of a 150 Ω DC-AN suitable for measurement of
UM disturbances (Example) . 72
Figure I.2 – Practical implementation of a 150 Ω DC-AN suitable for measurement of
CM and DM disturbances (Example, see also Figure A.2 in CISPR 16-1-2:2014) . 73
Figure I.3 – Practical implementation of a 150 Ω DC-AN suitable for measurement of
UM, or CM and DM disturbances (Example 1) . 73
Figure I.4 – Practical implementation of a 150 Ω DC-AN suitable for measurement of
UM, or CM and DM disturbances (Example 2) . 74
Figure I.5 – Practical implementation of a 150 Ω DC-AN suitable for measurement of
UM, or CM and DM disturbances (Example 3) . 74
Figure J.1 – Setup of the test site (Case 1) – 2D diagram . 75
Figure J.2 – Setup of the test site (Case 1) – 3D diagram . 76
Figure J.3 – Setup of the test site (Case 2) – 2D diagram . 77
Figure J.4 – Setup of the test site (Case 2) – 3D diagram . 78
Figure J.5 – Setup of the test site (Case 3) – 2D diagram . 79
Figure J.6 – Setup of the test site (Case 3) – 3D diagram . 79
Figure K.1 – Flow of the common mode RF current at test site configuration level . 82
Figure K.2 – Blocking of flow of common mode RF current by insert of series inductors . 83
Figure K.3 – Blocking of flow of common mode RF current by employment of
additional CM decoupling capacitors . 83
Figure K.4 – CM termination impedance at the EUT port of a DC-AN – Magnitude-
versus-frequency characteristic in the range 3 kHz to 30 MHz, Example . 84
Figure K.5 – Prevention of saturation of mitigation filters by use of additional
decoupling capacitors . 85
Figure K.6 – Change in the resonant frequency caused by the increase and decrease
in the decoupling capacitor's capacitance . 85
Figure K.7 – DC-AN circuit example where capacitance of blocking capacitors of the
LC decoupling circuit can be increased or decreased . 85

– 6 – CISPR 11:2015 © IEC 2015

Table 1 – Frequencies in the radio-frequency (RF) range designated by ITU for use as
fundamental ISM frequencies . 15
Table 2 – Disturbance voltage limits for class A group 1 equipment measured on a test
site (a.c. mains power port) . 18
Table 3 – Limits for conducted disturbances of class A group 1 equipment measured
on a test site (d.c. power port) . 19
Table 4 – Disturbance voltage limits for class B group 1 equipment measured on a test
site (a.c. mains power port) . 19
Table 5 – Disturbance voltage limits for class B group 1 equipment measured on a test
site (d.c. power port) . 19
Table 6 – Electromagnetic radiation disturbance limits for class A group 1 equipment
measured on a test site . 20
Table 7 – Electromagnetic radiation disturbance limits for class B group 1 equipment
measured on a test site . 21
Table 8 – Disturbance voltage limits for class A group 2 equipment measured on a test
site (a.c. mains power port) . 22
Table 9 – Disturbance voltage limits for class B group 2 equipment measured on a test
site (a.c. mains power port) . 22
Table 10 – Electromagnetic radiation disturbance limits for class A group 2 equipment
measured on a test site . 24
Table 11 – Electromagnetic radiation disturbance limits for class A EDM and arc
welding equipment measured on a test site . 25
Table 12 – Electromagnetic radiation disturbance limits for class B group 2 equipment
measured on a test site . 25
Table 13 – Electromagnetic radiation disturbance peak limits for group 2 equipment
operating at frequencies above 400 MHz . 26
Table 14 – Electromagnetic radiation disturbance weighted limits for group 2
equipment operating at frequencies above 400 MHz . 27
–1
Table 15 – Electromagnetic radiation disturbance APD level corresponding to 10
limits for class B group 2 equipment operating at frequencies above 400 MHz . 27
Table 16 – Electromagnetic radiation disturbance limits for class A group 1 equipment
measured in situ . 28
Table 17 – Electromagnetic radiation disturbance limits for class A group 2 equipment
measured in situ . 29
Table 18 – Frequency sub-ranges to be used for weighted measurements . 54
Table E.1 – Limits for electromagnetic radiation disturbances for in situ measurements
to protect specific safety-related radio services in particular areas . 61
Table H.1 – General margin to the limit for statistical evaluation . 65
Table H.2 – The non-central t-distribution factor k as a function of the sample size n . 67
Table H.3 – Application of the binomial distribution . 68
Table I.1 – Parameters and associated tolerances in the range 150 kHz to 30 MHz . 71
Table I.2 – Parameters and associated tolerances in the range 9 kHz to 150 kHz . 72

CISPR 11:2015 © IEC 2015 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
_____________
INDUSTRIAL, SCIENTIFIC AND MEDICAL EQUIPMENT –
RADIO-FREQUENCY DISTURBANCE CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT

FOREWORD
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