IEC 62477-1:2022/COR1:2024

Corrigendum 1 - Safety requirements for power electronic converter systems and equipment - Part 1: General

IEC 62477-1:2022 applies to power electronic converter systems (PECS), any specified accessories, and their components for electronic power conversion and electronic power switching, including the means for their control, protection, monitoring and measurement, such as with the main purpose of converting electric power, with rated system voltages not exceeding 1 000 V AC or 1 500 V DC.
This document also applies to PECS which intentionally emit or receive radio waves for the purpose of radio communication.
This document can also be used as a reference standard for product committees producing product standards for:
• adjustable speed electric power drive systems (PDS);
• standalone uninterruptible power systems (UPS);
• low voltage stabilized DC power supplies;
• bidirectional power converters.
For PECS and their specified accessories for which no product standard exists, this document provides minimum requirements for safety aspects.
This document has the status of a group safety publication in accordance with IEC Guide 104 for power electronic converter systems for solar, wind, tidal, wave, fuel cell or similar energy sources.
According to IEC Guide 104, one of the responsibilities of technical committees is, wherever applicable, to make use of basic safety publications and/or group safety publications in the preparation of their product standards.
Guidance for use of this group safety publication for product committees is given in Annex S.
This document
• establishes a common terminology for safety aspects relating to PECS,
• establishes minimum requirements for the coordination of safety aspects of interrelated parts within a PECS,
• establishes a common basis for minimum safety requirements for the PECS portion of products that contain PECS,
• specifies requirements to reduce risks of fire, electric shock, thermal, energy and mechanical hazards, during use and operation and, where specifically stated, during service and maintenance, and
• specifies minimum requirements to reduce risks with respect to PECS designed as pluggable and permanently connected equipment, whether it consists of a system of interconnected units or independent units, subject to installing, operating and maintaining the PECS in the manner prescribed by the manufacturer.
This document does not cover
• telecommunications apparatus other than power supplies to such apparatus,
• functional safety aspects as covered by, for example, IEC 61508 (all parts), and
• electrical equipment and systems for railways applications and electric vehicles.

Corrigendum 1 - Exigences de sécurité applicables aux systèmes et matériels électroniques de conversion de puissance - Partie 1: Généralités

L'IEC 62477-1:2022 s'applique aux systèmes électroniques de conversion de puissance (PECS), à tout accessoire spécifié, ainsi qu'à leurs composants pour la conversion de puissance électronique et la commande (ouverture et fermeture) électronique de puissance, y compris les moyens de commande, de protection, de surveillance et de mesure, qui ont pour principale fonction la conversion de puissance électrique, d'une tension système assignée qui ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu.
Le présent document s'applique également aux PECS qui émettent ou reçoivent intentionnellement des ondes radioélectriques à des fins de radiocommunication.
Le présent document peut également être utilisé comme norme de référence par les comités de produits qui élaborent des normes de produits applicables aux:
systèmes d'entraînement électrique de puissance à vitesse variable (PDS, Power Drive Systems);
alimentations sans interruption (ASI) autonomes;
alimentations stabilisées basse tension en courant continu;
convertisseurs de puissance bidirectionnels.
Pour les PECS et leurs accessoires spécifiés pour lesquels il n'existe pas de norme de produits, le présent document spécifie des exigences minimales pour les aspects de sécurité.
Le présent document a le statut d'une publication groupée de sécurité conformément au Guide 104 de l'IEC applicable aux systèmes électroniques de conversion de puissance pour énergie solaire, éolienne, des marées, des vagues, des piles à combustible ou sources d'énergie analogues.
Conformément au Guide 104 de l'IEC, il incombe aux comités d'études d'utiliser, dans toute la mesure du possible, les publications fondamentales de sécurité et/ou les publications groupées de sécurité pour l'élaboration de leurs normes de produits.
Les recommandations relatives à l'utilisation de la présente publication groupée de sécurité pour les comités de produits sont données à l'Annexe S.
Le présent document
établit une terminologie commune applicable aux aspects de sécurité concernant les matériels et les PECS,
établit les exigences minimales pour la coordination des aspects de sécurité des parties interconnectées au sein d'un PECS,
établit une base commune applicable aux exigences minimales de sécurité de la partie du convertisseur électronique de puissance (PEC) des produits qui comprennent un PECS,
spécifie les exigences qui permettent de réduire les risques d'incendie, de choc électrique, les dangers thermiques, mécaniques et dus à l'énergie électrique, en cours d'utilisation et de fonctionnement et, lorsque cela est spécifiquement indiqué, au cours des opérations d'entretien et de maintenance, et
spécifie les exigences minimales qui permettent de réduire les risques concernant les PECS conçus comme des équipements enfichables et reliés en permanence, qu'ils soient constitués d'un système d'unités interconnectées ou d'unités indépendantes, qui font l'objet d'opérations d'installation, de fonctionnement et d'entretien du PECS, comme cela est spécifié par le fabricant.
Le présent document ne couvre pas
les appareils de télécommunications autres que les alimentations pour ce type d'appareil,
les aspects de sécurité fonctionnelle traités, par exemple, par l'IEC 61508 (toutes les parties), et
les matériels et systèmes électriques utilisés dans les applications ferroviaires et les véhicules électriques.

General Information

• Status: Published
• Publication Date: 16-Apr-2024
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• Technical Committee: TC 22 - Power electronic systems and equipment
• Current Stage: PPUB - Publication issued
• Start Date: 17-Apr-2024
• Completion Date: 03-Jun-2024

Relations

• Corrects: IEC 62477-1:2022 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 12-Apr-2024

Standards Content (Sample)

© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
IEC 62477-1 IEC 62477-1
Edition 2.0  2022-05 Édition 2.0  2022-05

SAFETY REQUIREMENTS FOR POWER EXIGENCES DE SÉCURITÉ APPLICABLES AUX
ELECTRONIC CONVERTER SYSTEMS AND SYSTÈMES ET MATÉRIELS ÉLECTRONIQUES
EQUIPMENT DE CONVERSION DE PUISSANCE

Part 1: General Partie 1: Généralités

CO RRI G E NDUM 1
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.

3.33
Replace the term and definition (but not the note) with the following new term and definition:
(electrical) installation
assembly of electrical equipment to fulfil specific purposes
Note 1 to entry: The word "installation" is also used in this document to denote the process of installing a PECS. In
these cases, the word does not appear in italics.
[SOURCE: IEC 60050-826:2022, 826-10-01, modified – the note to entry has been added.]
3.36
Replace, in the term, “LV” with “LV” (in bold).
3.68
Replace, in the term, “SCPD” with “SCPD” (in normal bold).
3.74
Replace, in the term, “SPD” with “SPD” (in bold).
4.3.1 General
Replace the sixth paragraph with the following new paragraph:
For marking, see 6.2.1.4.
4.3.3 Short-circuit coordination (backup protection)
Replace the fifth paragraph with the following new paragraph:
IEC 62477-1:2022-05/COR1:2024-04(en-fr)

– 2 – IEC 62477-1:2022/COR1:2024
© IEC 2024
Compliance shall be checked by
• visual inspection in 5.2.1, and
• simulation or tests of 5.2.4.4 and 5.2.4.5
Figure 5 – Time-voltage zones for accessible circuits of DVC As and DVC B – DC during
single fault conditions
Replace Figure 5 with the following new figure:
120 120
10 100 1000 10000
Time(ms)
DVC As dry DC DVC B dry DC DVC As wet and saltwater wet DC

4.4.7.1.4 Overvoltage category (OVC)
Replace, in the second paragraph, the second bullet point starting with “Equipment of
overvoltage category III (OVC III) is equipment…”, with the following new bullet point:
• PECS of overvoltage category III (OVC III) is equipment in fixed installations and for cases
where the reliability and the availability of the equipment are subject to special
requirements.
4.4.7.2.2 SPD monitoring
Replace the first paragraph with the following new paragraph:
If the PECS manufacturer bundles an external SPD with their product for the purpose of
overvoltage category reduction, this device shall have a monitoring circuit as required in
4.4.7.2.3 or 4.4.7.2.4 that enables the PECS to create an indication when the device is damaged
by an overvoltage. If the SPD is internal to a PECS, the test of 5.2.3.15 applies.
4.4.7.4.2 Clearances for reinforced insulation
Replace in the first paragraph, the first bullet point with the following new text:
• the next higher value of impulse withstand voltage in column 1 of Table 8;
Voltage DC (V)
© IEC 2024
4.4.7.4.5 Clearance to conductive enclosures
Replace, in the second paragraph, "During and following" with the following:
"After"
4.11.10.3 Connection to external conductors
Replace the last paragraph with the following new paragraph:
For marking, see 6.3.7.4.1.
4.12.6 Strain relief
Replace, in the third paragraph, item c) with the following new text:
c) the cord shall not be damaged when subjected to a torque of the value and time shown in
5.2.2.8 as close as possible to the external end of the cord strain relief or bushing;
Table 23 – Test overview
Replace the fourth row with the following new row:
Clearance and creepage X  4.4.7.4, 4.4.7.5 5.2.2.1
distances test
5.2.2.4.2.1 General
Replace, in the fourth paragraph, "During" with:
"After"
5.2.3.3 Alternative to impulse withstand voltage test (type test, sample test)
Add, in the fifth paragraph, after the last sentence, the following new sentence:
The altitude correction according to Table 26 applies.

– 4 – IEC 62477-1:2022/COR1:2024
© IEC 2024
Figure 18 – Protective equipotential bonding impedance test for separate PECS with
power fed from the PECS with protection for the power cable
Replace Figure 18 with the following new figure:

5.2.3.13.2 Standard test procedure for non-separable thin sheet material (type test)
Replace, in the second paragraph “materal” with “material”.
5.2.3.13.3 Mandrel test (type test)
Replace, in the second paragraph, “materal” with “material”.
Table 32 – AC short-time withstand current test, minimum PECS requirements
Replace footnote b with the following new footnote:
b
Values compatible with Table 104 of IEC 62040-1:2017.

© IEC 2024
Table 33– Environmental tests
Replace Table 33 with the following new table:
Test condition Indoor conditioned Indoor unconditioned Outdoor unconditioned
IEC 60721-3-3 IEC 60721-3-3 IEC 60721-3-4
Climatic Dry heat (see 5.2.6.3.1) Dry heat (see 5.2.6.3.1) Dry heat (see 5.2.6.3.1)
Damp heat (see 5.2.6.3.2) Damp heat (see 5.2.6.3.2) Damp heat (see 5.2.6.3.2)
a
Chemically active No test requirement No test requirement
Salt mist (see 5.2.6.5)
substances
Mechanically active No test requirement No test requirement Dust (see 5.2.6.6)
substances
Sand (see 5.2.6.7)
Mechanical Vibration (see 5.2.6.4) Vibration (see 5.2.6.4) Vibration (see 5.2.6.4)
Biological No test requirement No test requirement No test requirement
UV resistance No test requirement No test requirement see 5.2.5.9
a a
Refer to footnote in Table 18.

6.1 General
Replace, in the second paragraph, “It” with “This information”.
Table 40 – Marking location
Replace Table 40 with the following new table:

a
Information Subclause Technical subclause
Location
reference 1 2 3 4 5 reference
Identifying the product 6.2.1.2 X X X X 4.1
Electrical ratings for each port 6.2.1.3 X X  X 4.1
Supplementary information for each port 6.2.1.4   X 4.1
Liquid cooled PECS 6.2.1.5 X X X X 4.1
General PECS marking 6.2.1.6   X 4.1
b
6.2.2 X X X X 4.1
Accessories
IP rating for enclosed PECS 6.3.2 X X  X 4.1
Dimensional and mounting drawings 6.3.2   X 4.1
Mass information 6.3.2 X X X X 4.1
Environment 6.3.3   X 4.9
Handling and mounting 6.3.4   X 4.2
Enclosure temperature 6.3.5   X 4.6.4.3
Open type PECS 6.3.6   X 4.4.3.3, 4.6.4.3
Interconnection and wiring diagrams 6.3.7.2   X 4.1, 4.2
Conductor (cable) selection 6.3.7.3   X 4.11.10.2
Identification of field wiring terminals 6.3.7.4.1 X X X X 4.11.5
Other details of field wiring terminals 6.3.7.4.2   X 4.11.10.3
Plug and socket-outlets 6.3.7.5 X X X X 4.11.7
Commissioning 6.3.8   X 4.1, 4.2
Accessible parts and circuits 6.3.9.1 X  X 4.4.3.3, 4.4.2.1
Protective equipotential bonding circuit 6.3.9.3 X X  X 4.4.4.2, 4.4.4.3.2,

– 6 – IEC 62477-1:2022/COR1:2024
© IEC 2024
a
Information Subclause Technical subclause
Location
reference 1 2 3 4 5 reference
Touch current or high leakage current 6.3.9.4 X  X 4.4.4.3.3
Compatibility with RCD 6.3.9.5 X  X 4.4.8
External protective devices 6.3.9.6   X 4.3.1, 4.3.3
Fire enclosures 6.3.9.7   X 4.6.3.1
General information for intended use 6.4.1   X 4.2
Adjustment 6.4.2 X  X 4.2
Isolating devices and disconnects 6.4.3.2 X X X X 4.1
Hot surface 6.4.4 X X X X 4.6.4.3
Control and device marking 6.4.5 X X X X 4.2
Manufacturing date 6.5.1.2 X X  4.2
Safety information 6.5.1.3   X 4.4.3.3
Capacitor discharge 6.5.2 X X X 4.4.9, 4.5.2
Auto restart/bypass connection 6.5.3 X X X 4.2
Other hazards 6.5.4   X 4.2
PECS with multiple sources of supply 6.5.5 X  X 4.8
Replaceable fuses in neutral 6.5.6 X  X 4.3.4
a
Location: 1. On PECS, visible when the enclosure cover is on and the door (see 4.4.3.3) is closed

(see 6.4.3)
2. On PECS, visible when opening a door (see 4.4.3.3) or removing a cover (see 6.4.3)
3. On PECS, separate self-adhesive label shipped with the device
4. On packaging
5. Documentation
For marking locations 1, 2 and 3, more than one X means that the appropriate location may be any one of
these according to the construction of the product and as indicated in the subclause referenced.
b
Location 1, 2 and 4 are the required location for the accessory, and location 5 is for the PECS.

6.2.1.4 Supplementary information for each port
Replace, in the seventh bullet, the second dash with the following new text:
), duration and the peak withstand current (I ) according
– short-time withstand current (I
cw pk
to 4.3.2.3.
6.2.1.6 General PECS marking
Replace the bulleted list with the following new list:
• intended use (see 4.1);
• specified accessories (see 4.1);
• reference(s) to relevant standard(s) for manufacture, test, or use;
• reference to documentation for installation, use and maintenance.

© IEC 2024
6.3.9.3 Protective equipotential bonding circuit
Replace the text of 6.3.9.3 with the following new text:
The protective equipotential bonding circuit in 4.4.4.2 shall be marked as follows.
• For the means of connection for the external PE conductor in 4.4.4.3.2, see 6.3.9.2.2;
NOTE 1 The following text is copied and modified from IEC 60204-1:2016, 13.2.2
• The internal protective equipotential bonding conductor shall be readily distinguishable from
other conductors by shape, location, marking, or colour;
• Where the internal protective equipotential bonding conductor can be easily identified by its
shape, position, or construction (for example a braided conductor, uninsulated stranded
conductor), no additional marking is required;
• When identification is by colour alone, the bicolour combination green-and-yellow shall be
used throughout the length of the conductor, or where the insulated conductor is not readily
accessible or is part of a multicore cable, colour coding throughout its length is not
necessary. However, where the conductor is not clearly visible throughout its length, the
ends or accessible locations shall be clearly identified by
– the symbol IEC 60417-5017:2006-08 (see Annex C),
– the bicolour combination green-and-yellow, or
– markings, if explained in the documentation.
NOTE 2 The following text is copied and modified from IEC 60950-1:2005 and
IEC 60950-1:2005/AMD1:2009, 1.7.7.1.
• However, where terminals for the connection are provided on a component or subassembly,
either the symbol IEC 60417-5017:2006-08 or the symbol IEC 60417-5019:2006-08 is
permitted (see Annex C).
As required in 4.4.4.2.1, where screws for connecting the protective equipotential bonding are
used for other purpose, this shall be specified in the documentation.
6.5.6 Replaceable fuses in neutral of single-phase PECS
Replace, in the third paragraph, the bulleted list with the following new list:
• the electric shock hazard symbol IEC 60417-6042:2010-11 or ISO 7010-W012:2011-05; and
• the fuse symbol IEC 60417-5016:2002-10; and an indication that the fuse is in the neutral
N (see Annex C).
– 8 – IEC 62477-1:2022/COR1:2024
© IEC 2024
Corrections à la version française:
3.33
Remplacer le terme et la définition (mais pas la note) par les nouveaux terme et définition
suivants:
installation (électrique)
ensemble de matériels électriques en vue d'une application donnée
Note 1 à l'article: Le mot "installation" est également utilisé dans le présent document pour désigner le processus
d'installation d'un PECS. Dans ces cas, le mot n'apparaît pas en italique.
[SOURCE: IEC 60050-826:2022, 826-10-01, modifiée – la note à l'article a été ajoutée.]
3.36
Remplacer, dans le terme, “BT” pa
...