EN IEC 62966-2:2020

SLOVENSKI STANDARD
01-december-2020
Mehanske konstrukcije za električno in elektronsko opremo - Omejitev prehoda za
IT-omarice - 2. del: Podrobnosti o zahtevah za pretok, ločevanje in hlajenje zraka
(IEC 62966-2:2020)
Mechanical structures for electrical and electronic equipment - Aisle containment for IT
cabinets - Part 2: Details of air flow, air separation and air cooling requirements (IEC
62966-2:2020)
Mechanische Bauweisen für elektrische und elektronische Einrichtungen –
Gangeinhausung für IT-Schränke – Teil 2: Einzelheiten zu Luftstrom-, Lufttrennungs-
und Luftkühlungsanforderungen (IEC 62966-2:2020)
Structures mécaniques pour équipements électriques et électroniques - Confinement
d’allées pour les baies informatiques - Partie 2: Détails des exigences relatives au flux
d’air, à la séparation des flux d’air et au refroidissement par air (IEC 62966-2:2020)
Ta slovenski standard je istoveten z: EN IEC 62966-2:2020
ICS:
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62966-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 31.240
English Version
Mechanical structures for electrical and electronic equipment -
Aisle containment for IT cabinets - Part 2: Details of air flow, air
separation and air cooling requirements
(IEC 62966-2:2020)
Structures mécaniques pour équipements électriques et Mechanische Bauweisen für elektrische und elektronische
électroniques - Confinement d'allées pour les baies Einrichtungen - Gangeinhausung für IT-Schränke - Teil 2:
informatiques - Partie 2: Détails des exigences relatives au Einzelheiten zu Luftstrom-, Lufttrennungs- und
flux d'air, à la séparation des flux d'air et au refroidissement Luftkühlungsanforderungen
par air (IEC 62966-2:2020)
(IEC 62966-2:2020)
This European Standard was approved by CENELEC on 2020-08-19. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62966-2:2020 E

European foreword
The text of document 48D/722/FDIS, future edition 1 of IEC 62966-2, 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 62966-2:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-05-19
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-08-19
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 62966-2:2020 was approved by CENELEC as a European
Standard without any modification.

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 62966-1 - Mechanical structures for electrical and EN IEC 62966-1 -
electronic equipment - Aisle containment for
IT cabinets - Part 1: Dimensions and
mechanical requirements
ISO 9972 - Thermal performance of buildings - EN ISO 9972 -
Determination of air permeability of buildings -
Fan pressurization method
IEC 62966-2 ®
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electrical and electronic equipment – Aisle

containment for it cabinets –
Part 2: Details of air flow, air separation and air cooling requirements

Structures mécaniques pour équipements électriques et électroniques –

Confinement d’allées pour les baies informatiques –

Partie 2: Détails des exigences relatives au flux d’air, à la séparation des flux

d’air et au refroidissement par air

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.240 ISBN 978-2-8322-8510-7

– 2 – IEC 62966-2:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Determination of the air leak rate . 9
4.1 Determination of the air leak rate of the individual components of an aisle
containment . 9
4.2 Components and system characteristic curves . 10
4.2.1 General . 10
4.2.2 Equipment requirements . 11
4.3 Measurement procedure . 11
4.3.1 Measurement conditions . 11
4.3.2 Preparing the elements of the test housing for measurement . 11
4.3.3 Measurement of the air leak rate . 13
4.4 Test report . 14
4.5 Measurement precision . 14
5 Air leakage rate of the aisle containment – Creation of an overall system
characteristic curve for the aisle containment . 15
6 Determination of the air leak rate – Determination of the air leak rate of the overall
system in operation, including the IT equipment . 15
Annex A (informative) Aisle containments according to operation mode . 17
A.1 Allocation of the aisle containments according to operation mode . 17
A.1.1 General . 17
A.1.2 Types of climate control . 17
A.1.3 Closed-circuit climate control . 17
A.1.4 In-line climate control . 17
A.2 Cold aisle containment . 18
A.2.1 Principle of the cold aisle containment . 18
A.2.2 Objective of the cold aisle . 18
A.2.3 Climate control . 18
A.3 Hot aisle containment . 18
A.3.1 Principle of the hot aisle containment . 18
A.3.2 Objective of the hot aisle . 19
A.3.3 Climate control . 19
A.4 Cold and hot aisle containment . 19
A.4.1 Principle of the cold and hot aisle containment . 19
A.4.2 Objective of the cold aisle in a cold and hot aisle containment . 20
A.4.3 Climate control . 20
Annex B (informative) Thermodynamic variables within aisle containments . 21
B.1 Air pressure . 21
B.1.1 General . 21
B.1.2 Minimum differential pressure . 21
B.1.3 Overpressure in hot aisle containments . 21
B.1.4 Negative pressure in hot aisle containments . 21
B.1.5 Overpressure in cold aisle containments . 21
B.1.6 Negative pressure in cold aisle containments . 21

IEC 62966-2:2020 © IEC 2020 – 3 –
B.2 Directions of flow . 22
B.2.1 Directions of flow "from the front to the back" . 22
B.2.2 Direction of flow "to the side" . 22
B.3 Flow velocities . 22
B.3.1 Closed-circuit climate control . 22
B.3.2 In-line climate control . 22
B.3.3 Design of the aisle containments . 22
B.4 Temperatures and humidity . 23
B.4.1 General . 23
B.4.2 Temperatures . 23
B.4.3 Humidity . 23
Bibliography . 24

Figure 1 – Example of the components – Roof . 9
Figure 2 – Example of the components – Door . 10
Figure 3 – Example of the components – Enclosures . 10
Figure 4 – Sealing the installation level . 12
Figure 5 – Example of a connecting design to the neighbouring enclosure .
...