WG 5 - TC 48/SC 48D/WG 5

IEC TS 62966-3:2021 defines the requirements for operational and personal safety of aisle containments for IT cabinets.
The aim is to provide physical security for the IT equipment installed in the containment using the criteria “availability” and “safety”.
The requirements apply to all operational, working and maintenance procedures.
This document does not apply to ordinary persons, when using installations and equipment.
The requirements described herein are also intended to ensure that it is possible for authorized personnel to enter and remain in the containment (as accessible equipment) and to maintain or upgrade the systems installed in the containment without risk. It should also be possible to evacuate the containment quickly and safely at any time, especially in the event of a fire or any other hazardous situation, whilst reducing the health risk to personnel to a minimum.
Aspects relating to computing, data processing, data storage, building protection or the data centre itself do not fall within the scope of this document. Only those additional aspects arising from the integration of an aisle containment are considered.
The design and positioning of an aisle containment, which is integrated in the data centre, has influence on the following different aspects of operational safety:
a) escape and evacuation plans;
b) escape routes;
c) emergency exits;
d) functional aspects of escape doors;
e) lighting conditions
f) lighting and signposting of escape routes;
g) fire protection.
In this document, these operational safety requirements and recommendations are considered.
To achieve the highest effectiveness, all these requirements are considered as much as possible during the design of an aisle containment.
This document applies to normal operations, not to the initial installation of the containment.

IEC 62966-2:2020 is dedicated to aisle containment techniques for information technology (IT) equipment typically used in data centres, describes the quantification of its air tightness, in particular the air loss ratio that describes the content of the volumetric flow not used for cooling the IT equipment. This ratio provides an index of efficiency, being inversely proportional to efficiency (the lower this ratio, the higher the efficiency). This document provides methods to measure an aisle containment air leakage rate and defines a classification system for aisle containment leakage.
This document defines:
- the measurement of the air leakage of the individual components of an aisle containment;
- a method for calculating the air leakage of an aisle containment based on its individual components;
- a method for calculating the air leakage rate of an aisle containment in relation to the utilised IT equipment;
- a classification system for aisle containment leakage.

IEC 62610-6:2020 deals with thermal management for cabinets in accordance with IEC 60297 and IEC 60917 series, provides compatible measurement methods of recirculation ratio and bypass ratio which are indicators for defining quality of airflow in the forced air cooling that can be commonly applied to indoor cabinets for mounting subrack and/or chassis-based equipment.
This document contains the following:
a) the definition of recirculation and bypass flow rates in the cooling of the cabinet,
b) the levels of the recirculation ratio RC,
c) the definition of the formula for the recirculation ratio RCs of forced air cooling subrack and/or chassis-based equipment installed in the cabinet,
d) the definition formula of recirculation ratio RCr and bypass rate BPr of the entire cabinet,
e) the requirements of the measuring method of each temperature necessary for calculating the recirculation ratio RCs, RCr and bypass ratio BPr.
The purpose of this document is to provide:
• for the equipment integrator and development designer of the cabinet the criteria for efficiently and correctly determining the specification, and
• for the supplier of the cabinet the measuring and classifying method for the airflow recirculation rate of the subrack and/or chassis-based equipment installed in the cabinet.

IEC 62966-1:2019 defines the dimensions and mechanical requirements of aisle containment for information technology (IT) cabinets. The cabinets concerned are dealt with in the standard series IEC 60297 and IEC 60917. The objective of this document is to stipulate properties and requirements of aisle containment ensuring cost effective installation, energy efficient and user-friendly operation of IT equipment in data centres and server rooms.
Key words: IT Cabinets, Aisle Containment

IEC 62610-2:2018 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.
Keywords: Cabinets, Subracks, Forced Air Cooling, Thermal Management

IEC 62610-5:2016 specifies a method for evaluating the cooling capacity mainly for air convection cooling of empty cabinets in accordance with IEC 60297 and IEC 60917 series. The purpose of this standard is to classify the cooling methods of empty indoor cabinets, to simplify the thermal hydraulic formulae for the evaluation and classification of cabinet cooling performances, and to exemplify the cooling performances for representative cabinet sizes based on IEC 60917 or IEC 60297. This enables the users to select the appropriate cabinet cooling solutions for their applications. Key words: Indoor cabinets, Thermal management, Cooling performance

IEC 62610-4:2013 specifies the test setup and test parameters for water supplied heat exchangers within single electronic cabinet configurations. The tests are focused on cabinets for the installation of high power dissipation electronic equipment. The cabinets concerned are from the IEC 60297 (19 in) and IEC 60917 (25 mm) series. The purpose of this standard is to provide comparable data for the cooling performance of cabinets according to defined test setups and cooling parameters. Key words: Electronic cabinets, cooling, water supplied heat exchangers

IEC/TS 62610-2:2011 provides for compatible methods of forced air cooled cabinets assembled with associated subracks and/or chassis in accordance with IEC 60297 and IEC 60917 series. This design guide contains the following: Thermal interfaces of subrack and/or chassis based equipment in a cabinet; reference temperature; preferred airflow conditions; airflow volume conditions and standard air. Also included are 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 explanatory indications for determining forced air-cooling structure. The terminology used complies with IEC 60917-1.

IEC/TS 62610-3:2009(E) provides an evaluation method for thermoelectrical cooling systems (Peltier effect). With this design guide it is possible to calculate the efficiency of the thermoelectrical cooling system (Peltier effect) and its cooling power depending on the ambient temperature and internal temperature. This design guide can also be used to appraise thermoelectrical cooling systems by its efficiency.

IEC/TS 62610-1:2009(E) provides guidelines for the installation of thermoelectrical cooling systems (Peltier effect) within cabinets ofthe IEC 60297 (19 inch) and IEC 60917 (25 mm) series. The cooling performance is in direct relation with the mounting location within a cabinet. Three typical mounting locations are identified:
1) cabinet with inside or outside mounted thermoelectrical cooling system for the cooling of a whole cabinet;
2) cabinet with top mounted thermoelectrical cooling system for the cooling of a whole cabinet;
3) cabinet with inbuilt thermoelectrical cooling system in form of a subrack for hot spot cooling.

Provides interface dimensions and cooling performance guidelines for cabinets, using water supplied heat exchangers. Is applicable to cabinets in accordance with the IEC 60297 (19 in) and IEC 60917 (25 mm) series.

Provides a method of thermal performance evaluation for empty indoor enclosures according to IEC 60917 and IEC 60297, and, for outdoor enclosures according to IEC 61969. Provides criteria to determine the thermal absorption factors relating to principles of enclosure design; internal heat load; sun radiation.