Mechanical structures for electrical and electronic equipment - Thermal management for cabinets in accordance with IEC 60297 and IEC 60917 series - Part 2: Method for the determination of forced air cooling structure (IEC 62610-2:2018)

This part of IEC 62610 provides for compatible methods of configuring forced air cooled
cabinets assembled with associated subracks and/or chassis in accordance with the
IEC 60297 and IEC 60917 series.
This document contains the following:
a) thermal interfaces of subracks and/or chassis-based equipment in a cabinet, described by:
• reference temperature,
• preferred airflow conditions,
• airflow volume conditions,
• standard air;
b) procedures for determining compatible forced airflow conditions in a cabinet by applying
typical thermal interface conditions.
The drawings used are not intended to indicate product design. They are only for explanatory
indications for determining forced air cooling.

Mechanische Bauweisen für elektrische und elektronische Einrichtungen - Wärmemanagement für Schränke nach den Reihen IEC 60297 und IEC 60917 - Teil 2: Verfahren zur Bestimmung der Zwangskühlungsstruktur

Structures mécaniques pour équipements électriques et électroniques - Gestion thermique pour les armoires conformes aux séries IEC 60297 ET IEC 60917 - Partie 2: Méthode pour la détermination du refroidissement par ventilation forcée

IEC 62610-2:2018 fournit des méthodes compatibles destinées à configurer des armoires à refroidissement par ventilation forcée assemblées avec des bacs à cartes et/ou des châssis associés conformes aux séries de normes IEC 60297 et IEC 60917. Le présent document contient ce qui suit: a) des interfaces thermiques d’équipements composés de bacs à cartes et/ou de châssis à l’intérieur d’une armoire, décrites par: · la température de référence, · les conditions préférentielles de circulation d’air, · les conditions de volume de circulation d’air, · l'air normalisé; b) des procédures pour déterminer des conditions de circulation d’air forcée compatibles dans une armoire en appliquant des conditions d’interface thermique typiques. Les dessins utilisés ne sont pas destinés à indiquer la conception des produits. Ils n’ont qu’une vocation explicative pour la détermination du refroidissement par ventilation forcée. Mots clés: armoires, bacs, refroidissement par ventilation forcée, gestion thermique

Mehanske strukture za električno in elektronsko opremo - Uravnavanje toplote v omaricah v skladu s skupinama standardov IEC 60297 in IEC 60917 - 2. del: Metoda za ugotavljanje strukture hlajenja zraka (IEC 62610-2:2018)

Ta del standarda IEC 62610 podaja usklajene metode za konfiguracijo omaric, hlajenih z zrakom in sestavljenih s povezanimi okvirji in/ali ogrodjem v skladu s standardi iz skupine IEC 60297 in IEC 60917.
Ta dokument vsebuje naslednje:
a) toplotne vmesnike opreme v omarici, ki temelji na okvirjih in/ali ogrodju, ki so opisani z naslednjih vidikov:
• referenčna temperatura,
• prednostni pogoji zračnega toka,
• pogoji glede volumna zračnega toka,
• standardni zrak;
b) postopke za ugotavljanje kompatibilnih pogojev prisilnega zračnega toka v omarici z uporabo tipičnih pogojev toplotnega vmesnika.
Uporabljene risbe ne ponazarjajo zasnove izdelka. Namenjene so samo kot razlaga za ugotavljanje hlajenja zraka.

General Information

Status
Published
Publication Date
21-Aug-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Jul-2018
Due Date
30-Sep-2018
Completion Date
22-Aug-2018

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SLOVENSKI STANDARD
SIST EN IEC 62610-2:2018
01-september-2018
0HKDQVNHVWUXNWXUH]DHOHNWULþQRLQHOHNWURQVNRRSUHPR8UDYQDYDQMHWRSORWHY
RPDULFDKYVNODGXVVNXSLQDPDVWDQGDUGRY,(&LQ,(&GHO
0HWRGD]DXJRWDYOMDQMHVWUXNWXUHKODMHQMD]UDND ,(&

Mechanical structures for electrical and electronic equipment - Thermal management for

cabinets in accordance with IEC 60297 and IEC 60917 series - Part 2: Method for the

determination of forced air cooling structure (IEC 62610-2:2018)
Ta slovenski standard je istoveten z: EN IEC 62610-2:2018
ICS:
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
SIST EN IEC 62610-2:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 62610-2:2018
---------------------- Page: 2 ----------------------
SIST EN IEC 62610-2:2018
EUROPEAN STANDARD EN IEC 62610-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 31.240
English Version
Mechanical structures for electrical and electronic equipment -
Thermal management for cabinets in accordance with
IEC 60297 and IEC 60917 series - Part 2: Method for the
determination of forced air cooling
(IEC 62610-2:2018)

Structures mécaniques pour équipements électriques et Mechanische Bauweisen für elektrische und elektronische

électroniques - Gestion thermique pour les armoires Einrichtungen - Wärmemanagement für Schränke nach den

conformes aux séries IEC 60297 ET IEC 60917 - Reihen IEC 60297 und IEC 60917 - Teil 2: Verfahren zur

Partie 2: Méthode pour la détermination du refroidissement Bestimmung der Zwangskühlungsstruktur

par ventilation forcée (IEC 62610-2:2018)
(IEC 62610-2:2018)

This European Standard was approved by CENELEC on 2018-06-20. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62610-2:2018 E
---------------------- Page: 3 ----------------------
SIST EN IEC 62610-2:2018
EN IEC 62610-2:2018
European foreword
The text of document 48D/664/FDIS, future edition 1 of IEC 62610-2, prepared by

SC 48D "Mechanical structures for electrical and electronic equipment" of IEC/TC 48 "Electrical

connectors and mechanical structures for electrical and electronic equipment" was submitted to the

IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62610-2:2018.
The following dates are fixed:
• latest date by which the document has to be (dop) 2019-03-20
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2021-06-20
• latest date by which the national
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 62610-2:2018 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60297-3-100 NOTE Harmonized as EN 60297-3-100.
IEC 60297-3-101 NOTE Harmonized as EN 60297-3-101.
IEC 60917-2-1 NOTE Harmonized as EN 60917-2-1.
IEC 60917-2-2 NOTE Harmonized as EN 60917-2-2.
IEC 62610-5 NOTE Harmonized as EN 62610-5.
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SIST EN IEC 62610-2:2018
EN IEC 62610-2:2018
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60917-1 - Modular order for the development of EN 60917-1 -
mechanical structures for electronic
equipment practices -
Part 1: Generic standard
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SIST EN IEC 62610-2:2018
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SIST EN IEC 62610-2:2018
IEC 62610-2
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electrical and electronic equipment – Thermal
management for cabinets in accordance with IEC 60297 and IEC 60917 series –
Part 2: Method for the determination of forced air cooling
Structures mécaniques pour équipements électriques et électroniques – Gestion
thermique pour les armoires conformes aux séries IEC 60297 ET IEC 60917 –

Partie 2: Méthode pour la détermination du refroidissement par ventilation forcée

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.240 ISBN 978-2-8322-5692-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 62610-2:2018
– 2 – IEC 62610-2:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Thermal conditions .......................................................................................................... 7

4.1 Baseline thermal conditions .................................................................................... 7

4.2 Reference temperature ........................................................................................... 7

4.3 Syntax of surfaces of a generic subrack, chassis or cabinet .................................... 8

4.4 Preferred airflow conditions .................................................................................... 9

4.5 Cabinet airflow volume and temperature rise management ................................... 10

5 Forced air thermal flow chart for cabinet equipment ....................................................... 11

5.1 General ................................................................................................................. 11

5.2 Evaluation of the actual thermal performance of subrack or chassis ...................... 12

5.3 Cabinet airflow considerations .............................................................................. 12

5.4 Arrangement of subracks and/or chassis-based equipment within the cabinet ....... 12

5.5 Selection of cabinet mounted forced air cooling device(s) ..................................... 13

5.6 Thermal operating environment ............................................................................. 13

5.7 Arrangement of cabinets in a server room and preferred airflow ............................ 15

Annex A (informative) General method of thermal design for electronic equipment .............. 16

A.1 Thermal resistance and thermal network model .................................................... 16

A.1.1 Thermal resistance ........................................................................................ 16

A.1.2 Thermal network model ................................................................................. 16

Bibliography .......................................................................................................................... 19

Figure 1 – Syntax of surfaces of a forced air cooled generic subrack or chassis to be

mounted into a cabinet ............................................................................................................ 8

Figure 2 – Syntax of surfaces of a forced air cooled generic cabinet ....................................... 9

Figure 3 – Preferred cabinet airflow patterns......................................................................... 10

Figure 4 – Airflow volume management ................................................................................ 11

Figure 5 – Forced air thermal flow chart for cabinet equipment ............................................. 12

Figure 6 – Thermal operating environment (cabinet sectional side view) ............................... 14

Figure 7 – Cabinet operating temperature range ................................................................... 15

Figure 8 – Example of cabinet airflows in an aisle containment server room ......................... 15

Figure A.1 – Thermal network model for a plug-in unit in subrack or chassis ......................... 18

Table 1 – Preferred airflow pattern .......................................................................................... 9

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SIST EN IEC 62610-2:2018
IEC 62610-2:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MECHANICAL STRUCTURES FOR ELECTRICAL
AND ELECTRONIC EQUIPMENT –
THERMAL MANAGEMENT FOR CABINETS IN
ACCORDANCE WITH IEC 60297 AND IEC 60917 SERIES –
Part 2: Method for the determination of forced air cooling
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

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

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

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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 62610-2 has been prepared by subcommittee 48D: Mechanical

structures for electrical and electronic equipment, of IEC technical committee 48: Electrical

connectors and mechanical structures for electrical and electronic equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
48D/664/FDIS 48D/673/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.
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SIST EN IEC 62610-2:2018
– 4 – IEC 62610-2:2018 © IEC 2018

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 62610 series, published under the general title Mechanical

structures for electrical and electronic equipment – Thermal management for cabinets in

accordance with IEC 60297 and IEC 60917 series, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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SIST EN IEC 62610-2:2018
IEC 62610-2:2018 © IEC 2018 – 5 –
INTRODUCTION

Power dissipation of high-end servers, telecommunication equipment and electronic

controllers has been increasing rapidly. Thermal management for electronic systems has

become critical to maintain performance and reliability.

For a long time natural convection air cooling was an adequate and reliable solution. Typically,

the cooling air entered a system at the bottom and the heated air exited at the top. However,

with increasing packaging density heat dissipation of components required

“compartmentalizing” of functions within a cabinet. Individual subracks and chassis require

their own individual cooling solutions often enhanced by forced air cooling devices such as

fans.

In the absence of any guide, subrack and chassis designers typically solve their cooling

problems in a way that is best suited for their specific application leaving the cabinet system

integrator to deal with a mix of incompatible subrack and/or chassis cooling concepts.

An improper arrangement of multiple subracks and/or chassis (the equipment) in a cabinet

may cause a severe imbalance of airflow within the cabinet. Two typical undesirable factors

may be triggered by such an imbalanced airflow. The required airflow volume to each

individual cabinet mounted equipment may be inadequate for proper cooling. The temperature

of components in a cabinet mounted subrack and/or chassis may increase as the exhaust air

of one equipment increases the intake air temperature of other equipment.

This document defines the basic and principal method to implement forced air cooling in

electrical and electronic cabinets. This is applied for the thermal design of any

electrical/electronic cabinet, as well as for their set-up in machine rooms, such as data

centers using aisle containment. Cooling airflow is considered not only inside of the cabinets

but also outside of the cabinets. A variable speed fan may be optional in cabinets or

subracks/chassis, but is not regarded in this standard.

The intention of this document is to guide the subrack and/or chassis system designer, the

cabinet integrator and also the data centre system integrator who deploys equipment cabinets

in the machine room to provide for compatible forced air cooling solutions.

This document is based on the mechanical structures as defined in the IEC 60297 and

IEC 60917 series of standards.
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SIST EN IEC 62610-2:2018
– 6 – IEC 62610-2:2018 © IEC 2018
MECHANICAL STRUCTURES FOR ELECTRICAL
AND ELECTRONIC EQUIPMENT –
THERMAL MANAGEMENT FOR CABINETS IN
ACCORDANCE WITH IEC 60297 AND IEC 60917 SERIES
...

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