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

Name:IEC 62966-2:2020   Standard name:Mechanical structures for electrical and electronic equipment - Aisle containment for IT cabinets - Part 2: Details of air flow, air separation and air cooling requirements
Standard number:IEC 62966-2:2020   language:English and French language
Release Date:14-Jul-2020   technical committee:SC 48D - Mechanical structures for electrical and electronic equipment
Drafting committee:WG 5 - TC 48/SC 48D/WG 5   ICS number:01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION

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





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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

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 . 12
Figure 6 – Example of a connecting design to the roof . 13
Figure 7 – Example of a connecting design to the end door . 13
Figure 8 – Example of component and system characteristic curves . 14
Figure 9 – Example of a hydraulic addition of individual characteristic curves . 15
Figure 10 – Classification of aisle containment by class factors . 16
Figure A.1 – Example of an in-line climate control . 17
Figure A.2 – Example of a cold aisle containment . 18
Figure A.
...

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