EN 55025:2017

SLOVENSKI STANDARD
01-april-2017
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Vehicles, boats and internal combustion engines - Radio disturbance characteristics -
Limits and methods of measurement for the protection of on-board receivers
Ta slovenski standard je istoveten z: EN 55025:2017
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.100.99 Drugi vidiki v zvezi z EMC Other aspects related to
EMC
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 55025
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2017
ICS 33.100.10; 33.100.20 Supersedes EN 55025:2008
English Version
Vehicles, boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of
measurement for the protection of on-board receivers
(CISPR 25:2016)
Véhicules, bateaux et moteurs à combustion interne - Fahrzeuge, Boote und von Verbrennungsmotoren
Caractéristiques des perturbations radioélectriques - angetriebene Geräte - Funkstöreigenschaften - Grenzwerte
Limites et méthodes de mesure pour la protection des und Messverfahren für den Schutz von an Bord befindlichen
récepteurs embarqués Empfängern
(CISPR 25:2016) (CISPR 25:2016)
This European Standard was approved by CENELEC on 2016-12-01. 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, Serbia, 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
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 55025:2017 E
European foreword
The text of document CISPR/D/432/FDIS, future edition 4 of CISPR 25, prepared by CISPR SC
D "Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal
combustion engine powered devices” was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN 55025:2017.
The following dates are fixed:
• latest date by which the document has to be (dop) 2017-09-01
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2019-12-01
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 55025:2008.

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.
Endorsement notice
The text of the International Standard CISPR 25:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
CISPR 22 NOTE Harmonized as EN 55022.
CISPR 12:2007 NOTE Harmonized as EN 55012:2007.
CISPR 12:2007/AMD1:2009 NOTE Harmonized as EN 55012:2007/A1:2009.
CISPR 16-2-3:2010 NOTE Harmonized as EN 55016-2-3:2010.
CISPR 16-2-3:2010/AMD1:2010 NOTE Harmonized as EN 55016-2-3:2010/A1:2010.
CISPR 16-2-3:2010/AMD2:2014 NOTE Harmonized as EN 55016-2-3:2010/A2:2014.

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
ISO 7637-3 2016 Road vehicles -- Electrical disturbances - -
from conduction and coupling -- Part 3:
Electrical transient transmission by
capacitive and inductive coupling via lines
other than supply lines
ISO 11452-4 2011 Road vehicles_- Component test methods - -
for electrical disturbances from narrowband
radiated electromagnetic energy_- Part_4:
Harness excitation methods
CISPR 16-1-1 2015 Specification for radio disturbance and - -
immunity measuring apparatus and
methods - Part 1-1: Radio disturbance and
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
methods -- Part 1-4: Radio disturbance and
immunity measuring apparatus - Antennas
and test sites for radiated disturbance
measurements
+ A1 2012  + A1 2012
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
SAE ARP 958.1 -  Electromagnetic Interference Measurement - -
Antennas; Standard Calibration Method

CISPR 25 ®
Edition 4.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
INT ERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

C OMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

Vehicles, boats and internal combustion engines – Radio disturbance

characteristics – Limits and methods of measurement for the protection of

on-board receivers
Véhicules, bateaux et moteurs à combustion interne – Caractéristiques des

perturbations radioélectriques – Limites et méthodes de mesure pour la

protection des récepteurs embarqués

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10, 33.100.20 ISBN 978-2-8322-3726-7

– 2 – CISPR 25:2016 © IEC 2016
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 12
3 Terms and definitions . 13
4 Requirements common to vehicle and component/module emissions
measurements . 17
4.1 General test requirements . 17
4.1.1 Categories of disturbance sources (as applied in the test plan) . 17
4.1.2 Test plan . 17
4.1.3 Determination of conformance of equipment under test (EUT) with limits . 17
4.1.4 Operating conditions . 18
4.1.5 Test report . 19
4.2 Shielded enclosure . 19
4.3 Absorber-lined shielded enclosure (ALSE) . 19
4.3.1 General . 19
4.3.2 Size . 19
4.3.3 Objects in ALSE . 19
4.3.4 ALSE performance validation . 20
4.4 Measuring instrument. 20
4.4.1 General . 20
4.4.2 Spectrum analyser parameters . 20
4.4.3 Scanning receiver parameters . 23
4.5 Power supply . 25
5 Measurement of emissions received by an antenna on the same vehicle . 26
5.1 Antenna measuring system . 26
5.1.1 Type of antenna . 26
5.1.2 Measuring system requirements . 26
5.2 Method of measurement . 28
5.3 Test setup for vehicle in charging mode . 30
5.3.1 General . 30
5.3.2 AC power charging without communication . 30
5.3.3 AC or DC power charging with communication line(s) or with signal
line(s) . 33
5.4 Examples of limits for vehicle radiated disturbances . 37
6 Measurement of components and modules . 39
6.1 General . 39
6.2 Test equipment . 39
6.2.1 Reference ground plane . 39
6.2.2 Power supply and AN . 40
6.2.3 Load simulator . 40
6.3 Conducted emissions from components/modules – Voltage method . 41
6.3.1 General . 41
6.3.2 Test setup . 41
6.3.3 Test procedure . 42

CISPR 25:2016 © IEC 2016 – 3 –
6.3.4 Limits for conducted disturbances from components/modules – Voltage
method . 46
6.4 Conducted emissions from components/modules – Current probe method . 49
6.4.1 Test setup . 49
6.4.2 Test procedure . 49
6.4.3 Limits for conducted disturbances from components/modules – Current
probe method . 52
6.5 Radiated emissions from components/modules – ALSE method . 54
6.5.1 General . 54
6.5.2 Test setup . 54
6.5.3 Test procedure . 57
6.5.4 Limits for radiated disturbances from components/modules – ALSE
method . 62
6.6 Radiated emissions from components/modules – TEM cell method . 65
6.7 Radiated emissions from components/modules – Stripline method . 65
Annex A (informative) Flow chart for checking the applicability of CISPR 25 . 66
Annex B (normative) Antenna matching unit – Vehicle test. 67
B.1 Antenna matching unit parameters (150 kHz to 6,2 MHz) . 67
B.2 Antenna matching unit – Verification . 67
B.2.1 General . 67
B.2.2 Gain measurement . 67
B.2.3 Test procedure . 67
B.3 Impedance measurement . 67
Annex C (informative) Sheath-current suppressor . 69
C.1 General information . 69
C.2 Suppressor construction . 69
Annex D (informative) Guidance for the determination of the noise floor of active
vehicle antennas in the AM and FM range . 70
Annex E (normative) Artificial networks (AN), artificial mains networks (AMN) and
asymmetric artificial networks (AAN) . 73
E.1 General . 73
E.2 Artificial networks (AN) . 73
E.2.1 Component powered by LV . 73
E.2.2 Component powered by HV . 75
E.2.3 Component involved in charging mode connected to DC power mains . 77
E.2.4 Vehicle in charging mode connected to DC power mains . 77
E.3 Artificial mains networks (AMN) . 77
E.3.1 Component AMN . 77
E.3.2 Vehicle in charging mode connected to AC power mains . 77
E.4 Asymmetric artificial network (AAN) . 78
E.4.1 General . 78
E.4.2 Symmetric communication lines . 78
E.4.3 PLC on power lines. 79
E.4.4 PLC (technology) on control pilot . 80
Annex F (informative) Radiated emissions from components/modules – TEM cell
method . 82
F.1 General . 82
F.2 Test setup . 83
F.2.1 Setup with major field emission from the wiring harness . 83

– 4 – CISPR 25:2016 © IEC 2016
F.2.2 Setup with major field emissions from the EUT . 84
F.2.3 Power supply and AN . 84
F.2.4 Signal/control line filters . 85
F.3 Test procedure . 86
F.4 Limits for radiated disturbances from components/modules – TEM cell
method . 87
F.5 TEM cell design . 89
Annex G (informative) Radiated emissions from components/modules – Stripline
method . 91
G.1 General . 91
G.2 Test setup . 91
G.2.1 General . 91
G.2.2 Stripline impedance matching . 91
G.2.3 Location of the EUT . 92
G.2.4 Location and length of the test harness . 92
G.2.5 Location of the load simulator . 92
G.3 Test procedure . 92
G.4 Limits for radiated emissions from components/modules – Stripline method . 93
G.5 Stripline design . 96
Annex H (informative) Interference to mobile radio communication in the presence of
impulsive noise – Methods of judging degradation . 99
H.1 General . 99
H.2 Survey of methods of judging degradation to radio channel . 99
H.2.1 General . 99
H.2.2 Subjective tests . 99
H.2.3 Objective tests . 100
H.2.4 Conclusions relating to judgement of degradation . 101
Annex I (normative) Test methods for shielded power supply systems for high voltages
in electric and hybrid vehicles . 102
I.1 General . 102
I.2 Conducted emission from components/modules on HV power lines – Voltage
method . 102
I.2.1 Ground plane arrangement . 102
I.2.2 Test set-up . 103
I.2.3 Limits for conducted emission – Voltage method. 108
I.3 Conducted emission from components/modules on HV power lines – current
probe method . 110
I.3.1 Reference ground plane arrangement . 110
I.3.2 Test setup . 110
I.3.3 Limits for conducted emission – current probe method. 115
I.4 Radiated emissions from components/modules – ALSE method . 115
I.4.1 Reference ground plane arrangement . 115
I.4.2 Test setup . 115
I.4.3 Limits for radiated emissions – ALSE method . 120
I.5 Coupling between HV and LV systems . 120
I.5.1 General . 120
I.5.2 Measurement based on test setups defined in Clause 6 . 120
I.5.3 Measurement of the HV-LV coupling attenuation . 126
Annex J (informative) ALSE performance validation 150 kHz to 1 GHz . 129
J.1 General . 129

CISPR 25:2016 © IEC 2016 – 5 –
J.2 Reference measurement method . 131
J.2.1 Overview . 131
J.2.2 Equipment . 131
J.2.3 Procedure . 133
J.2.4 Requirements . 137
J.3 Modelled long wire antenna method . 137
J.3.1 Overview . 137
J.3.2 Equipment . 138
J.3.3 Procedure . 140
J.3.4 Requirements . 149
Annex K (informative) Items under consideration . 151
K.1 General . 151
K.2 Measurement techniques and limits . 151
K.3 Measurement uncertainty . 151
K.4 Reconsideration of the Scope of the standard . 151
K.5 Digital Service bands . 151
K.6 Reorganizing the document into separate parts similar to CISPR-16
document series . 151
Bibliography . 152

Figure 1 – Method of determination of conformance for all frequency bands . 18
Figure 2 – Example of gain curve . 27
Figure 3 – Vehicle-radiated emissions – Example for test layout (end view with
monopole antenna) . 29
Figure 4 – Example of test setup for vehicle with plug located on vehicle side (AC
powered without communication) . 31
Figure 5 – Example of test setup for vehicle with plug located front / rear of vehicle (AC
powered without communication) . 32
Figure 6 – Example of test setup for vehicle with plug located on vehicle side (AC or
DC powered with communication) . 35
Figure 7 – Example of test setup for vehicle with plug located front /rear of vehicle (AC
or DC powered with communication) . 36
Figure 8 – Average limit for radiated disturbance from vehicles . 39
Figure 9 – Conducted emissions – Example of test setup for EUT with power return
line remotely grounded . 43
Figure 10 – Conducted emissions – Example of test setup for EUT with power return
line locally grounded . 44
Figure 11 – Conducted emissions – Example of test setup for alternators and
generators . 45
Figure 12 – Conducted emissions – Example of test setup for ignition system
components . 46
Figure 13 – Conducted emissions – Example of test setup for current probe
measurements . 51
Figure 14 – Test harness bending requirements . 56
Figure 15 – Example of test setup – Rod antenna . 58
Figure 16 – Example of test setup – Biconical antenna . 59
Figure 17 – Example of test setup – Log-periodic antenna . 60
Figure 18 – Example of test setup – Above 1 GHz . 61
Figure 19 – Example of average limit for radiated disturbances from components . 64

– 6 – CISPR 25:2016 © IEC 2016
Figure A.1 – Flow chart for checking the applicability of this standard . 66
Figure B.1 – Verification setup . 68
Figure C.1 – Characteristic S of the ferrite core . 69
Figure D.1 – Vehicle test setup for equipment noise measurement in the AM/FM range . 71
Figure D.2 – Vehicle test setup for antenna noise measurement in the AM/FM range . 72
Figure E.1 – Example of 5 µH AN schematic . 74
Figure E.2 – Characteristics of the AN impedance Z . 74
PB
Figure E.3 – Example of 5 µH HV AN schematic . 76
Figure E.4 – Example of 5 µH HV AN combination in a single shielded box . 76
Figure E.5 – Impedance matching network attached between HV ANs and EUT . 77
Figure E.6 – Example of an AAN for symmetric communication lines . 79
Figure E.7 – Example of AAN circuit of PLC on AC or DC powerlines . 80
Figure E.8 – Example of an AAN circuit for PLC on pilot line . 81
Figure F.1 – TEM cell (example) . 82
Figure F.2 – Example of arrangement of leads in the TEM cell and to the connector
panel . 83
Figure F.3 – Example of the arrangement of the connectors, the lead frame and the
dielectric support . 84
Figure F.4 – Example for the required minimum attenuation of the signal / control line
filters . 85
Figure F.5 – Setup for measurement of the filter attenuation . 85
Figure F.6 – Example of the TEM cell method test setup . 86
Figure F.7 – TEM cell . 89
Figure G.1 – Example of a basic stripline test setup in a shielded enclosure . 93
Figure G.2 – Example for a 50 Ω stripline . 97
Figure G.3 – Example for a 90 Ω stripline . 98
Figure I.1 – Conducted emission – Example of test setup for EUTs with shielded power
supply systems . 105
Figure I.2 – Conducted emission – Example of test setup for EUTs with shielded
power supply systems with electric motor attached to the bench . 106
Figure I.3 – Conducted emission – Example of test setup for EUTs with shielded power
supply systems and inverter/charger device . 107
Figure I.4 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems . 112
Figure I.5 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems with electric motor attached
to the bench . 113
Figure I.6 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems and inverter/charger device . 114
Figure I.7 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems . 117
Figure I.8 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems with electric motor attached to
the bench . 118
Figure I.9 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems and inverter/charger device . 119
Figure I.10 – Test setup for calibration of the test signal . 121

CISPR 25:2016 © IEC 2016 – 7 –
Figure I.11 – Example of test setup for conducted emissions – Voltage method –
Measurement on LV ports with injection on HV supply ports . 122
Figure I.12 – Example of test setup for conducted emissions – Current probe method –
Measurement on LV ports with injection on HV supply ports . 123
Figure I.13 – Example of test setup for radiated emissions – ALSE method –
Measurement with biconical antenna with injection on HV supply ports . 125
Figure I.14 – Test setup for EUT S measurements . 127
Figure I.15 – Examples of requirements for coupling attenuation, a . 128
c
Figure J.1 – Examples of typical ALSE influence parameters over the 10 MHz to 100
MHz frequency range . 130
Figure J.2 – Visual representation of ALSE performance validation process . 131
Figure J.3 – Example of construction of a transmitting monopole . 132
Figure J.4 – Side view of the antenna configuration for reference measurement below

30 MHz . 134
Figure J.5 – Top view of antenna configuration for reference measurement 30 MHz and
above (with the biconical antenna shown as example) . 135
Figure J.6 – Side view of antenna configuration for reference measurement 30 MHz
and above (with the biconical antenna shown as example) . 135
Figure J.7 – Top view of antenna configuration for the ALSE measurement below
30 MHz . 136
Figure J.8 – Metallic sheet angles used as support for the rod . 139
Figure J.9 – Radiator side view 50 Ω terminations . 139
Figure J.10 – Photo of the radiator mounted on the ground reference plane . 139
Figure J.11 – Example VSWR measured from four radiation sources (without 10 dB
attenuator) . 140
Figure J.12 – Example setup for ALSE equivalent field strength measurement (rod
antenna shown for the frequency range below 30 MHz) . 142
Figure J.13 – MoM-modell for the frequency range 30 MHz to 200 MHz . 144

Table 1 – Spectrum analyser parameters . 22
Table 2 – Scanning receiver parameters . 24
Table 3 – Antenna types . 26
Table 4 – Example for limits of disturbance – Complete vehicle . 37
Table 5 – Examples of limits for conducted disturbances – Voltage method . 48
Table 6 – Examples of limits for conducted disturbances – Current probe method . 53
Table 7 – Examples of limits for radiated disturbances – ALSE method. 63
Table E.1 – Magnitude of the AN impedance Z . 75
PB
Table F.1 – Examples of limits for radiated disturbances – TEM cell method . 88
Table F.2 – Dimensions for TEM cells . 90
Table G.1 – Examples of limits for radiated disturbances – Stripline method . 95
Table I.1 – Example for HV limits for conducted voltage measurements at shielded
power supply devices (HV-LV decoupling class A5) . 109
Table I.2 – Example of configurations for equipment without negative LV line . 127
Table I.3 – Example of configurations for equipment with negative LV line . 127
Table I.4 – Examples of requirements for minimum coupling attenuation, a . 128
c
Table J.1 – Reference data to be used for chamber validation . 145

– 8 – CISPR 25:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
____________
VEHICLES, BOATS AND INTERNAL COMBUSTION ENGINES –
RADIO DISTURBANCE CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT FOR
THE PROTECTION OF ON-BOARD RECEIVERS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard CISPR 25 has been prepared by CISPR subcommittee D:
Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal
combustion engine powered devices.
This fourth edition cancels and replaces the third edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inclusion of charging mode for electric vehicles (EV) and plug-in electric vehicles (PHEV),
b) the methods for chamber validation have been included,

CISPR 25:2016 © IEC 2016 – 9 –
c) test methods for shielded power supply systems for high voltages for electric and hybrid
electric vehicles have bee
...