IEC 60947-3:2020/AMD1:2025

Amendment 1 - Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units

Amendement 1 - Appareillage à basse tension - Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-fusibles

General Information

• Status: Published
• Publication Date: 24-Apr-2025
• ICS: 29.120.40 - Switches
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: SC 121A - Low-voltage switchgear and controlgear
• Drafting Committee: MT 6 - TC 121/SC 121A/MT 6
• Current Stage: PPUB - Publication issued
• Start Date: 25-Apr-2025
• Completion Date: 02-May-2025

Relations

• Amends: IEC 60947-3:2020 - Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60947-3 ®
Edition 4.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 3: Switches, disconnectors, switch-disconnectors and fuse combination
units
Appareillage à basse tension –
Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-
fusibles
IEC 60947-3:2020-04/AMD1:2025-04(en-fr)

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IEC 60947-3 ®
Edition 4.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –

Part 3: Switches, disconnectors, switch-disconnectors and fuse combination

units
Appareillage à basse tension –

Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-

fusibles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40, 29.130.20 ISBN 978-2-8327-0366-3

– 2 – IEC 60947-3:2020/AMD1:2025
© IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 3: Switches, disconnectors, switch-disconnectors and
fuse-combination units
AMENDMENT 1
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 this end and
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
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shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60947-3 ED4 has been prepared by subcommittee 121A: Low-voltage
switchgear and controlgear, of IEC technical committee 121: Switchgear and controlgear and
their assemblies for low voltage.
This amendment includes the following significant technical changes with respect to the current
edition:
– addition of remotely operated devices;
– addition of a new Annex G defining the requirements for DC disconnectors,
switch-disconnectors and fuse combination units for use in Battery Power Supplies (BPS)
that are used in battery energy storage systems (BESS);

© IEC 2025
– addition of test requirements for short circuit making of single-phase operated switches and
switch-disconnectors;
– switches for photovoltaic applications with utilisation categories DC-PV1 and DC-PV2 can,
subject to marking, be suitable for current flow in one or both directions;
– more clarity in Annex F on the measurement of power loss in devices incorporating
electronics and different pole configurations in DC devices.
The text of this Amendment is based on the following documents:
Draft Report on voting
121A/645/FDIS 121A/675/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
___________
2 Normative references
Add the following new references:
IEC 60068-2-14:2023, Environmental testing – Part 2-14: Tests – Test N: Change of
temperature
IEC 62208:2023, Empty enclosures for low-voltage switchgear and controlgear assemblies –
General requirements
– 4 – IEC 60947-3:2020/AMD1:2025
© IEC 2025
3.3 General terms
Add the following new terms:
3.3.11
remotely operated equipment
switching equipment that is electrically operated from a point distant from the controlled
switching device
Note 1 to entry: A remotely operated switch can have an additional feature for either local or manual (non-electrical)
operation, or both.
Note 2 to entry: Remote operation can be performed by an integral device or an auxiliary device associated with
the switching device, for example, motor operator or coils.
Note 3 to entry: Remote operation can be achieved via physical wiring, wifi, Bluetooth, etc., as defined in the product
documentation.
3.3.12
operating time of a remotely operated equipment
time measured from the instant when the switching operation is initiated at the switching device
to (i) the closing of the main contacts or (ii) the opening of the main contacts
Note 1 to entry: Operating times from closed to open (opening time) and from open to closed (closing time) can be
different.
Note 2 to entry: For a definiton of closing time, see 3.7.44 of IEC 60947-1:2020 and for a definition of opening time,
see 3.7.39 of IEC 60947-1:2020.
4.2 According to the method of operation
4.2.2 Remotely operated equipment
Delete “Under consideration” and add the following:
– remotely operated:
• self-powered remotely operated equipment;
• externally powered remotely operated equipment;
– type of remote operation:
• opening and closing: both opening and close operation controllable from remote;
• opening only: only opening operation controllable from remote.
5 Characteristics
5.2 Type of equipment
Add, after the fifth dash, the following new dash:
– control method of the device.
Add the following new subclause:
5.9 Remote operation
The manufacturer shall declare the following:
a) minimum and maximum values of voltage operating limits for the control supply and, as
applicable, corresponding frequency;
b) the closing time, when applicable (3.7.44 of IEC 60947-1:2020);
c) the opening time (3.7.39 of IEC 60947-1:2020);

© IEC 2025
d) the type of operating signal:
i) permanent signal;
ii) single impulse;
e) information on power consumption for remote operation:
i) nominal power consumption and duration;
ii) inrush power consu
...