prEN IEC 63552:2025
(Main)Switching device for islanding (SDFI)
Switching device for islanding (SDFI)
Appareil de connexion pour le passage en réseau séparé (SDFI)
Stikalna naprava za otočenje (SDFI)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Stikalna naprava za otočenje (SDFI)
Switching device for islanding (SDFI)
Appareil de connexion pour le passage en réseau séparé (SDFI)
Ta slovenski standard je istoveten z: prEN IEC 63552:2025
ICS:
27.015 Energijska učinkovitost. Energy efficiency. Energy
Ohranjanje energije na conservation in general
splošno
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
23K/121/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63552 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-05-23 2025-08-15
SUPERSEDES DOCUMENTS:
23K/99/CD, 23K/116A/CC
IEC SC 23K : ELECTRICAL ENERGY EFFICIENCY PRODUCTS
SECRETARIAT: SECRETARY:
France Mr Philippe Vollet
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 8,SC 23B,SC 23E,TC 64,SC 121A
ASPECTS CONCERNED:
Energy Efficiency
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
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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
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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:
Switching device for islanding (SDFI)
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
After resolution of 23K/99/CD comments, officiers support the circulation of this CDV.
download 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.
2 IEC CDV 63552 ED1 © IEC 2025
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 8
6 2 Normative references . 9
7 3 Terms and definitions . 10
8 4 Classification . 14
9 4.1 General . 14
10 4.2 According to the construction . 15
11 4.3 According to the method of integration . 15
12 4.4 According to the method of operation . 15
13 4.5 According to the kind of current . 16
14 4.6 According to the number of switched poles . 16
15 4.7 According to SRCSD interlocking means . 16
16 4.8 According to the reclosing mode . 16
17 4.9 According to islanding means . 16
18 4.10 According to the type of isolation . 16
19 4.11 According to the type of local sources . 16
20 5 Characteristics . 16
21 6 Markings and product information . 17
22 7 Standard conditions for operation in service . 18
23 8 Requirements for construction and operation . 19
24 8.1 General requirements . 19
25 8.2 Construction requirements . 19
26 8.2.1 Mechanism . 19
27 8.2.2 SDFI operation and interlocking . 20
28 8.2.3 Manual reclosing of the SDFI . 21
29 8.2.4 Voltage and frequency deviations . 22
30 8.2.5 Voltage withstand between open contacts . 22
31 8.3 Reclosing operations (reconnection to grid connected mode) . 22
32 8.4 Operational endurance . 24
33 8.5 EMC . 24
34 9 Type tests . 24
35 9.1 General . 24
36 9.2 SDFI operation and interlocking . 24
37 9.3 Tests for manual reclosing . 24
38 9.4 Verification of operations upon deviations . 25
39 9.5 Test for reclosing operations . 26
40 9.5.1 General . 26
41 9.5.2 SDFI provided for closing without synchronization . 26
42 9.5.3 SDFI provided for reclosing with synchronization . 27
43 9.6 EMC tests . 28
44 9.6.1 General . 28
45 9.6.2 Electromagnetic emission . 28
46 9.6.3 Electromagnetic immunity . 28
47 Bibliography . 30
IEC CDV 63552 ED1 © IEC 2025 3
49 Figure 1 – Example of islandable PEI architecture . 6
50 Figure 2 –Example of SDFI . 15
51 Figure 3 – SDFI operation principle . 20
52 Figure 4 – Example of architecture of a PEI operating in TT in connected mode and
53 becoming TN in island mode . 21
54 Figure 5 – Example of sequence diagram for operation upon source deviation and grid
55 loss for transition to island mode . 22
56 Figure 6 – Grid reconnection – without synchronization (open transition) . 23
57 Figure 7 – Grid reconnection – with synchronization (closed transition) . 23
58 Figure 8 – Example of typical undervoltage ride through capability profile . 26
60 Table 1 – Requirements and position for markings and other product information . 17
61 Table 2 – Values of influencing quantities . 18
62 Table 3 – Immunity tests and performance criteria . 28
63 Table 4 – Performance criteria . 29
4 IEC CDV 63552 ED1 © IEC 2025
66 INTERNATIONAL ELECTROTECHNICAL COMMISSION
67 ____________
69 SWITCHING DEVICE FOR ISLANDING (SDFI)
71 FOREWORD
72 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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80 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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100 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
101 indispensable for the correct application of this publication.
102 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
103 rights. IEC shall not be held responsible for identifying any or all such patent rights.
104 IEC XXXXX has been prepared by subcommittee 23K: Electrical Energy Efficiency products, of
105 IEC technical committee 23: Electrical accessories. It is an International Standard.
106 The text of this International Standard is based on the following documents:
Draft Report on voting
23K/XX/FDIS 23K/XX/RVD
108 Full information on the voting for its approval can be found in the report on voting indicated in
109 the above table.
110 The language used for the development of this International Standard is English.
111 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
112 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
113 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
114 described in greater detail at www.iec.ch/standardsdev/publications.
115 In this document, the following print types are used:
116 – conformity statements: in italic type.
IEC CDV 63552 ED1 © IEC 2025 5
117 The committee has decided that the contents of this document will remain unchanged until the
118 stability date indicate
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