EN 61000-4-27:2000/A2:2025
(Amendment)Electromagnetic compatibility (EMC) - Part 4-27: Testing and measurement techniques – Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
Electromagnetic compatibility (EMC) - Part 4-27: Testing and measurement techniques – Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
Elektromagnetische Verträglichkeit (EMV) - Teil 4-27: Prüf- und Messverfahren - Prüfung der Störfestigkeit von Geräten mit einem Eingangsstrom, der 16 A je Leiter nicht überschreitet, gegen Unsymmetrie (der Versorgungsspannung)
Compatibilité électromagnétique (CEM) - Partie 4-27: Techniques d'essai et de mesure - Essai d'immunité aux déséquilibres pour des matériels avec un courant appelé n'excédant pas 16 A par phase
Elektromagnetna združljivost (EMC) - 4-27. del: Preskusne in merilne tehnike - Preskus odpornosti proti nesimetriji za opremo z vhodnim tokom do 16 A na fazo - Dopolnilo A2
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Elektromagnetna združljivost (EMC) - 4-27. del: Preskusne in merilne tehnike -
Preskus odpornosti proti nesimetriji za opremo z vhodnim tokom do 16 A na fazo -
Dopolnilo A2
Amendment 2 - Electromagnetic compatibility (EMC) - Part 4-27: Testing and
measurement techniques - Unbalance, immunity test for equipment with input current not
exceeding 16 A per phase
Amendement 2 - Compatibilité électromagnétique (CEM) - Partie 4-27: Techniques
d'essai et de mesure - Essai d'immunité aux déséquilibres.
Ta slovenski standard je istoveten z: EN IEC 61000-4-27:2000/prA2:2025
ICS:
33.100.20 Imunost Immunity
SIST EN IEC 61000-4- en
27:2002/oprA2:2025
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
77A/1236/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61000-4-27/AMD2 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-01-24 2025-04-18
SUPERSEDES DOCUMENTS:
77A/1229/CD, 77A/1234/CC
IEC SC 77A : EMC - LOW FREQUENCY PHENOMENA
SECRETARIAT: SECRETARY:
France Mr Cédric LAVENU
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 77/SC 77A Horizontal Basic EMC
ASPECTS CONCERNED:
Electromagnetic Compatibility
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Amendment 2 - Electromagnetic compatibility (EMC) - Part 4-27: Testing and measurement
techniques - Unbalance, immunity test
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose
without permission in writing from IEC.
IEC 61000-4-27/AMD2 ED1 © IEC 2025 2 77A/1236/CDV
1 Contents
2 INTRODUCTION . 3
3 TEXT OF THE AMENDMENT PROPOSAL . 4
4 3 Terms and definitions . 4
5 5 Test Levels . 4
6 6 Test equipment . 5
7 6.1 Test generators . 5
8 7 Test set-up . 6
9 8.2 Execution of the test . 6
10 9 Evaluation of test results . 6
11 10 Test report . 6
12 Annex B (informative) Calculation of the degree of unbalance . 9
IEC 61000-4-27/AMD2 ED1 © IEC 2025 3 77A/1236/CDV
14 INTRODUCTION
15 The CDV proposed for Amendment 2 to IEC 61000-4-27 Ed. 1.1 (= IEC 61000-4-27:2000 plus
16 IEC 61000-4-27/AMD1:2009) is based on 77A/1189/DC, 77A/1198A/INF and follows
17 77A/1212/RR, 77A/1229/CD, 77A/1234/CC.
18 This CDV contains the following main changes in comparison with IEC 61000-4-27 ED 1.1:
19 The angles in table 1 (test levels) suggest a three-phase system with a negative phase sequence
20 while the intention is to have a positive phase sequence and thus the signs and values of all angles
21 in Table 1 should be corrected. In addition, the value of ku2 of class 2, test 3 is 28 % instead of
22 25 %. The Table 1 is modified accordingly
23 Class X is defined as special and levels 2 and 3 refers to Annex D instead of 61000-2-4.
24 UN is deleted from Table 1, and it is moved to the new clause 3 (Terms, definitions, and
25 abbreviations). The definition 3.5 UN nominal phase to neutral voltage is added.
26 In addition, the definition of rise and fall time is added (as in 61000-4-11 ed 3).
27 The text in Note 1 in Table 1 is deleted and replaced by “Ub is lagging against Ua, and Uc is
28 leading against Ua”.
29 In table 1 Add NOTE 2: The product committee may specify any test level; however, for equipment
30 connected to public supply systems, it Is recommended that the levels should not be lower than
31 those defined for class 2.
32 The sentence under Table 1 becomes NOTE 2 in the Table 1.
33 Some changes are introduced also in Table 2 (Characteristics of the generator). Main changes:
34 • Modified output current capability which must be able to provide a crest factor of at least 3
35 when UN applied to calibration load.
36 • Modified voltage rise time adding (from 10 %to 90 %)
37 • Modified phase shifting
38 • Modified phase accuracy (put 50 Hz or 60 Hz).
39 In clause 7 a sentence is added: The equipment under test (EUT) is set up at a steady mains
40 voltage
41 In clause 8.2 the last sentence “After each group of tests a full functional check shall be
42 performed.” Is deleted. In addition, Figure 2 is simplified.
43 In clause 10 updated Figures 1 and 2 are included.
44 A new informative Annex B is proposed which includes two different calculation methods:
45 • method 1 does not require complex or vector calculus.
46 • method 2 uses phasors and matrices but is more compact.
47 Both methods are mathematically equivalent.
IEC 61000-4-27/AMD2 ED1 © IEC 2025 4 77A/1236/CDV
48 TEXT OF THE AMENDMENT PROPOSAL
49 The title of Clause 3 “Definitions” is modified to:
50 3 Terms and definitions
52 3.3
53 unbalance factor k (%)
u2
54 Delete “ku2 = 100 % (U2 / U1)” and replace with the following text:
| |
𝑈𝑈
55 𝑘𝑘 = (negative-sequence voltage / positive-sequence voltage)
𝑢𝑢2
|𝑈𝑈 |
57 Add the following new definitions:
58 3.5 U
N
59 nominal phase to neutral voltage
61 3.6
62 rise time
63 interval of time between the instants at which the instantaneous value of a transition first reaches
64 a specified lower value and then a specified upper value
65 NOTE The lower and upper values are fixed at 10 % and 90 % of the transition magnitude.
66 [SOURCE: IEC 60050-161:1990, 161-02-05]
67 3.7
68 fall time
69 interval of time between the instants at which the instantaneous value of a transition first reaches
70 a specified upper value and then a specified lower value
71 NOTE The lower and upper values are fixed at 10 % and 90 % of the transition magnitude.
72 NOTE This definition is derived from IEC 60050-161:1990, 161-02-05.
74 5 Test Levels
75 In Table 1 “test levels”:
76 - The angles are modified from a three-phase system with a negative to a positive phase
77 sequence and thus the signs and values of all angles in Table 1 are to be corrected.
78 - The value of ku2 of class 2, test 3 is 28 % instead of 25 %.
79 - Test levels for Class X are tagged (“special”).
80 - NOTE 1 and NOTE 2 are modified.
82 Hence, Table 1 is modified as follows:
Test Test Test level for Class 2 Test level for Class 3 Test
number level level
Phase Ampli- Angle k Time Phase Ampli- Angle k Time
u2 u2
Class 1 for
tude t tude t
D D
Class X
°
% U % s % U % s
N N
U 100 0° U 100 0°
a a
No test
Test 1 U 95,2 −125° 6 30 U 93,5 −127° 8 60 special
b b
required
U 90 +120° U 87 +120°
c c
IEC 61000-4-27/AMD2 ED1 © IEC 2025 5 77A/1236/CDV
U 100 0° U 100 0°
a a
Test 2 U 90 −131° 13 15 U 87 −134° 17 15 special
b b
U 80 +121° U 74 +122°
c c
Ua 110 0° Ua 110 0°
Test 3 U 66 −139° 28 0,1 U 66 −139° 28 2 special
b b
U 71 +125° U 71 +125°
c c
NOTE 1 U is lagging against U , and U is leading against U .
b a c a
NOTE 2 The product committee may specify any test level; however, for equipment connected to public supply systems, it is
recommended that the levels should not be lower than those defined for class 2.
84 Below Table 1, the paragraph “Tests are respective
...
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