IEC 62208:2011
(Main)Empty enclosures for low-voltage switchgear and controlgear assemblies - General requirements
Empty enclosures for low-voltage switchgear and controlgear assemblies - General requirements
IEC 62208:2011 applies to empty enclosures, prior to the incorporation of switchgear and controlgear components by the user, as supplied by the enclosure manufacturer. This standard specifies general definitions, classifications, characteristics and test requirements of enclosures to be used as part of switchgear and controlgear assemblies (e.g. in accordance with the IEC 61439 series), the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c., and suitable for general use for either indoor or outdoor applications. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision and includes the following significant technical changes with respect to the last edition:
- consideration of the restructured series of standards IEC 61439;
- alignment of test procedures with the newest relevant standards.
Enveloppes vides destinées aux ensembles d'appareillage à basse tension - Règles générales
La CEI 62208:2011 s'applique aux enveloppes vides, avant incorporation de l'appareillage par l'utilisateur, dans l'état où elles sont fournies par le fabricant. Cette norme spécifie les définitions, les classifications, les caractéristiques et les exigences d'essai générales des enveloppes à utiliser en tant que partie d'ensembles d'appareillage (selon par exemple la série CEI 61439), dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu pour usage général extérieur ou intérieur. Cette deuxième édition annule et remplace la première édition parue en 2002. Cette édition constitue une révision technique et elle inclut les modifications techniques majeures suivantes par rapport à l'édition antérieure:
- prise en compte de la série de normes CEI 61439 restructurée;
- alignement des procédures d'essai sur les toutes nouvelles normes applicables.
General Information
Standards Content (sample)
IEC 62208
Edition 2.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Empty enclosures for low-voltage switchgear and controlgear assemblies –
General requirements
Enveloppes vides destinées aux ensembles d'appareillage à basse tension –
Exigences générales
IEC 62208:2011
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IEC 62208
Edition 2.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Empty enclosures for low-voltage switchgear and controlgear assemblies –
General requirements
Enveloppes vides destinées aux ensembles d'appareillage à basse tension –
Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.130.20 ISBN 978-2-88912-661-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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CONTENTS
FOREWORD ........................................................................................................................... 4
1 Scope ............................................................................................................................... 6
2 Normative references ....................................................................................................... 6
3 Terms and definitions ....................................................................................................... 7
4 Classification .................................................................................................................... 8
5 EMC requirements ............................................................................................................ 8
6 Information to be given regarding the enclosure ............................................................... 9
6.1 General ................................................................................................................... 9
6.2 Marking ................................................................................................................... 9
6.3 Documentation ........................................................................................................ 9
6.3.1 General ....................................................................................................... 9
6.3.2 Dimensions ................................................................................................. 9
6.3.3 Mounting arrangements ............................................................................. 10
6.3.4 Permissible loads ...................................................................................... 10
6.3.5 Lifting and transport support ...................................................................... 10
6.3.6 Protective circuit ........................................................................................ 10
7 Service conditions .......................................................................................................... 10
7.1 General ................................................................................................................. 10
7.2 Normal service conditions ..................................................................................... 10
7.2.1 Ambient air temperature ............................................................................ 10
7.2.2 Humidity conditions ................................................................................... 11
7.3 Special service conditions ..................................................................................... 11
7.4 Conditions during transport and storage ................................................................ 11
8 Design and construction ................................................................................................. 11
8.1 General ................................................................................................................. 11
8.2 Static loads ........................................................................................................... 12
8.3 Lifting and transport support .................................................................................. 12
8.4 Access to the interior of the enclosure ................................................................... 12
8.5 Protective circuit.................................................................................................... 12
8.6 Dielectric strength ................................................................................................. 12
8.7 Degree of protection (IK code) ............................................................................... 12
8.8 Degree of protection (IP code) ............................................................................... 13
9 Type tests ...................................................................................................................... 13
9.1 General ................................................................................................................. 13
9.2 General conditions of tests .................................................................................... 13
9.3 Marking ................................................................................................................. 14
9.4 Static loads ........................................................................................................... 14
9.5 Lifting .................................................................................................................... 14
9.6 Axial loads of metal inserts .................................................................................... 15
9.7 Degree of protection against external mechanical impacts (IK code) ..................... 15
9.8 Degree of protection (IP code) ............................................................................... 16
9.8.1 Degree of protection against access to hazardous parts and againstthe ingress of solid foreign objects indicated by first characteristic
numeral ..................................................................................................... 16
9.8.2 Degree of protection against ingress of water as indicated by secondcharacteristic numeral ............................................................................... 16
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9.8.3 Degree of protection against hazardous parts as indicated by
additional letter .......................................................................................... 17
9.9 Properties of insulating materials .......................................................................... 17
9.9.1 Thermal stability ........................................................................................ 17
9.9.2 Resistance to normal heat ......................................................................... 17
9.9.3 Resistance to abnormal heat and to fire ..................................................... 17
9.10 Dielectric strength ................................................................................................. 18
9.10.1 General ..................................................................................................... 18
9.10.2 Preconditioning.......................................................................................... 19
9.10.3 Enclosures without metal elements inside the protected space .................. 19
9.10.4 Enclosures having metal elements inside the protected space ................... 19
9.10.5 Results to be obtained ............................................................................... 19
9.11 Continuity of the protective circuit.......................................................................... 19
9.12 Resistance to ultra-violet (UV) radiation ................................................................ 20
9.13 Resistance to corrosion ......................................................................................... 20
9.13.1 General ..................................................................................................... 20
9.13.2 Test procedure .......................................................................................... 20
9.13.3 Results to be obtained ............................................................................... 21
9.14 Thermal power dissipation capability ..................................................................... 21
Bibliography .......................................................................................................................... 22
Table 1 – Number of samples to be tested and order of test per sample ............................... 13
Table 2 – Axial loads of metal inserts.................................................................................... 15
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EMPTY ENCLOSURES FOR LOW-VOLTAGE
SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –
GENERAL REQUIREMENTS
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 in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
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Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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Publications.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 IEC 62208 has been prepared by subcommittee 17D: Low-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.This second edition cancels and replaces the first edition published in 2002.
This edition constitutes a technical revision and includes the following significant technical
changes with respect to the last edition:– consideration of the restructured series of standards IEC 61439;
– alignment of test procedures with the newest relevant standards.
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62208 © IEC:2011 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
17D/442/FDIS 17D/447/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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EMPTY ENCLOSURES FOR LOW-VOLTAGE
SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –
GENERAL REQUIREMENTS
1 Scope
This International Standard applies to empty enclosures, prior to the incorporation of
switchgear and controlgear components by the user, as supplied by the enclosuremanufacturer.
This standard specifies general definitions, classifications, characteristics and test
requirements of enclosures to be used as part of switchgear and controlgear assemblies (e.g.
in accordance with the IEC 61439 series), the rated voltage of which does not exceed
1 000 V a.c. or 1 500 V d.c., and suitable for general use for either indoor or outdoor
applications.NOTE 1 Additional requirements may apply for specific applications.
NOTE 2 The United States of America (USA) uses enclosure “Type” designations according to NEMA 250. The
NEMA Enclosure Type designations specify additional environmental requirements for conditions such as
corrosion, rust, icing, oil, and coolants. For this reason, the IEC Enclosure Classification Designations IP are used
with an enclosure Type designation number appropriate for these markets.This standard does not apply to enclosures, which are covered by other specific products
standards (e.g. IEC 60670 series).Compliance with the safety requirements of the applicable product standard is the
responsibility of the assembly manufacturer.NOTE 3 This standard may serve as a basis for other technical committees.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-11:1981, Basic environmental testing procedures – Part 2-11: Tests – Test Ka:
Salt mistIEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60695-2-10:2000, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods –
Glow-wire apparatus and common test procedure___________
There is a consolidated edition 2.1 (2001) that includes IEC 60529 (1989) and its Amendment 1 (1999).
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IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test methods for end-productsIEC 61439-1:2011, Low-voltage switchgear and controlgear assemblies – Part 1: General
rulesIEC 62262:2002, Degrees of protection provided by enclosures for electrical equipment
against external mechanical impacts (IK code)ISO 178:2001, Plastics – Determination of flexural properties
ISO 179 (all parts), Plastics – Determination of Charpy impact properties
ISO 2409:2007, Paints and varnishes – Cross-cut test
ISO 4628-3:2003, Paints and varnishes – Evaluation of degradation of coatings – Designation
of quantity and size of defects, and of intensity of uniform changes in appearance – Part 3:
Assessment of degree of rustingISO 4892-2:2006, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-
arc sourcesAmendment 1 (2009)
ISO 11469:2000, Plastics – Generic identification and marking of plastic products
3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.
3.1
empty enclosure
enclosure intended for support and installation of electrical equipment, whose internal space
provides suitable protection against external influences as well as a specified degree of
protection against approach to or contact with live parts and against contact with moving parts
NOTE 1 Throughout this standard, the word enclosure is used for empty enclosure.NOTE 2 The terms boxes, cubicles, desks or cabinets are alternative terms for enclosures.
3.2protected space
internal space or portion of the internal space of the enclosure as specified by the
manufacturer intended for the mounting of switchgear and controlgear for which the specified
protection is provided by the enclosure3.3
cover
external part of the enclosure
3.4
door
hinged or sliding cover
___________
To be published.
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3.5
mounting plate
separate internal accessory of the enclosure intended for the mounting of electrical
components3.6
cable gland plate
removable accessory of the enclosure, intended for securing and sealing of cables,
conductors and conduits at their point of entry3.7
removable cover
cover which is designed for closing an opening in the external enclosure and which can be
removed for carrying out certain operations and maintenance workNOTE A lid is considered as a removable cover.
3.8
enclosure manufacturer
manufacturer of an enclosure or the vendor who resells under his own responsibility
4 ClassificationEnclosures are classified according to:
a) the type of material:
• insulating;
• metallic;
• combination of insulating and metallic;
b) method of fixing:
• floor standing;
• wall mounting;
• flush mounting;
• pole mounting;
c) the intended location:
• outdoor;
• indoor;
d) the degree of protection:
• IP code, according to IEC 60529;
• IK code, according to IEC 62262;
e) the rated insulation voltage (for enclosures made of insulating materials).
5 EMC requirements
EMC requirements are not applicable for enclosures to this standard.
NOTE For degrees of protection provided by enclosures against electromagnetic disturbances (EM code), see
IEC 61000-5-7.---------------------- Page: 10 ----------------------
62208 © IEC:2011 – 9 –
6 Information to be given regarding the enclosure
6.1 General
The following information shall be given by the manufacturer.
6.2 Marking
The enclosure shall be identifiable, making it possible for the assembly manufacturer to obtain
relevant information from the enclosure manufacturer. Such identification shall comprise:
• either the name, trade mark or identification mark of the enclosure manufacturer;
• type designation or identification number of the enclosure.The marking shall be durable and easily legible and may be inside the enclosure.
Compliance is checked according to the test of 9.3 and by inspection.
Marking for the recycling of plastic parts shall be as stated in ISO 11469.
NOTE Marking of enclosures intended for total insulation (equivalent to class II) assemblies with the symbol
IEC 60417-5172 is the responsibility of the assembly manufacturer.6.3 Documentation
6.3.1 General
The manufacturer's documentation shall include all relevant constructional, mechanical
characteristics, the enclosure classification (see Clause 4) and any instruction necessary for
the correct handling, assembling, mounting and service conditions of the enclosure as well as
reference to this standard:• dimensions (see 6.3.2);
• mounting arrangements (see 6.3.3);
• permissible loads (see 6.3.4);
• lifting devices, if necessary (see 6.3.5);
• provisions for protection against electric shock (see 6.3.6);
• applicable service conditions (see Clause 7);
• location and size of protected space;
• data of thermal power dissipation capability;
• rated insulation voltage of enclosures constructed of an insulating material;
• degree of protection (IK and IP codes, see 8.7 and 8.8).
The data for the thermal power dissipation capability are a function of the admissible
temperature inside the enclosure. They shall be provided for the different installation methods
(e.g. flush mounting, surface mounting) of the enclosure and of the design of the enclosure,
i.e. with or without ventilation openings and number of horizontal partitions. They shall include
at least temperature rise inside the enclosure, at the top, and external surfaces temperature
rise, for a given power loss inside the enclosure. This will provide the user with the correct
data for the selection of the enclosure according to electrical equipment to be installed. For
the purpose of the calculation, it is assumed that the heat generated by the selected
equipment is distributed uniformly inside the protected space.6.3.2 Dimensions
The dimensions shall be given in millimetres.
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The external dimensions: height, width and depth are nominal values and shall be indicated in
the catalogue of the enclosure manufacturer.The projection of cable gland plates, removable covers and handles shall not be included in
the external nominal dimensions, the dimensions of such shall be included in themanufacturer’s documentation.
6.3.3 Mounting arrangements
The means and location of the enclosure mounting shall be defined in the enclosure
manufacturer's documentation.The location of the equipment mounting surfaces and their means of fixing shall be defined in
the enclosure manufacturer's documentation.6.3.4 Permissible loads
The permissible loads that the enclosure and its doors are able to carry shall be defined in the
enclosure manufacturer's documentation (see also 8.2).6.3.5 Lifting and transport support
Where required, the correct location and installation of lifting and transport support and the
thread size of lifting devices, if applicable, shall be given in the enclosure manufacturer's
documentation or in the instructions on how the enclosure has to be handled (see also 8.3).
6.3.6 Protective circuitThe enclosure manufacturer shall indicate in the technical documentation, if the enclosure
ensures electrical continuity throughout by the conductive structural parts of the enclosure or
if and how separate protective conductors to the protective circuits of the installation shall be
carried out (see also 8.5).7 Service conditions
7.1 General
Enclosures conforming to this standard are intended for use under the following service
conditions.The enclosure manufacturer shall specify the locations for which the enclosure is intended.
7.2 Normal service conditions7.2.1 Ambient air temperature
7.2.1.1 Ambient air temperature for indoor locations
The ambient air temperature does not exceed +40 °C and its average over a period of 24 h
does not exceed +35 °C.The lower limit of the ambient air temperature is –5 °C.
7.2.1.2 Ambient air temperature for outdoor locations
The ambient air temperature does not exceed +40 °C and its average over a period of 24 h
does not exceed +35 °C.---------------------- Page: 12 ----------------------
62208 © IEC:2011 – 11 –
The lower limit of the ambient air temperature is –25 °C.
7.2.2 Humidity conditions
7.2.2.1 Humidity conditions for indoor locations
The relative humidity of the air does not exceed 50 % at a maximum temperature of +40 °C.
Higher relative humidity may be permitted at lower temperatures, for example 90 % at +20 °C.
Moderate condensation should be borne in mind which may occasionally occur due to
variations in temperature.7.2.2.2 Humidity conditions for outdoor locations
The relative humidity may be temporarily as high as 100 % at a maximum temperature of
+25 °C.7.3 Special service conditions
Where any of the followin
...
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