SIST EN 300 119-5 V1.2.2:2006
(Main)Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 5: Thermal management
- Abstract
A standard for the thermal management of racks and cabinets defining preferred solutions for the removal of heat dissipated by one or more subracks in an ETSI rack. For example: air flow, direction of air, air velocity, permitted air temperature, necessity and type of air baffle. The starting point for the standard is to consider the ETSI mechanical dimensions as a non-modifiable item. The standard also has to define a possible preferred range for the power dissipation within an ETSI miscellaneous rack depending on different standardized solutions. The standards should be applicable to telecommunication and ITE equipment from different suppliers designed for the installation in an ETSI rack.
- Status
- Published
- Publication Date
- 31-Jan-2006
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Feb-2006
- Due Date
- 01-Feb-2006
- Completion Date
- 01-Feb-2006
SIST EN 300 119-5 V1.2.2:2006 is the Slovenian adoption of ETSI EN 300 119-5 Version 1.2.2, a European telecommunication standard for equipment practice on thermal management. It specifies preferred solutions for removing heat from subracks in ETSI racks and cabinets, while keeping the ETSI mechanical dimensions fixed. The document is aimed at suppliers, integrators, operators and others who need to place telecommunication or information technology equipment in shared rack environments.
What does SIST EN 300 119-5 V1.2.2:2006 specify?
SIST EN 300 119-5 V1.2.2:2006 specifies thermal management for subracks, racks/cabinets and miscellaneous racks/cabinets installed indoors in restricted access locations. Its focus is the heat removed by one or more subracks in an ETSI rack, with practical guidance on airflow route, air direction, air speed, air temperature and the use of air baffles.
The document is organized into clauses on scope, references, definitions and abbreviations, general requirements, and thermal management. It also includes a normative annex with manufacturer data and an informative bibliography.
| Annex | What it covers |
|---|---|
| Annex A | Normative equipment characterization data to be provided by the manufacturer |
| Annex B | Informative bibliography |
What are the key requirements of SIST EN 300 119-5 V1.2.2:2006?
The main requirements in SIST EN 300 119-5 V1.2.2:2006 are about choosing airflow paths, keeping temperatures within limits, and supplying enough data for thermal analysis. In practice, the standard helps designers and integrators predict how equipment behaves in a rack, especially when several suppliers’ products share the same enclosure.
- Clause 4.1 requires equipment to be designed for the indoor environments defined in ETSI EN 300 019-1-3. This means the thermal design must suit the intended indoor operating conditions, and the supplier should be able to provide the Annex A data on request.
- Clause 4.2 says safety requirements are outside the scope of this standard and points to EN 60950-1 for safety of touchable parts. In practice, thermal design and product safety have to be checked separately.
- Clause 4.3 limits the temperature of issuing air to 75°C in worst-case conditions if that air can contact cables. This matters because hot exhaust can damage wiring or create a safety issue.
- Clause 5 makes natural convection the primary cooling method and says the ARCM should be designed to support it. Assisted cooling is only for cases where passive cooling cannot handle the heat load.
- Clause 5.1 gives the preferred subrack airflow route: in at the left, front or bottom, and out at the right, back or top. This is the basic layout rule for rack airflow planning.
- Clause 5.2 gives the preferred ARCM airflow route: in at the front and out at the top, with bottom inlet allowed if there is a ventilated floor. It also says mixed parallel and serial airflow is not preferred, and that methods should prevent air mixing between subracks.
- Annex A requires characterization data from the manufacturer for thermal modelling and configuration review. It covers both natural convection and forced convection equipment, plus additional data for MRC, fan trays and air filters.
What terms does SIST EN 300 119-5 V1.2.2:2006 define?
- Ambient - the spatial maximum temperature of the air entering the rack/cabinet.
- Cabinet - a free-standing, self-supporting enclosure for electrical and/or electronic equipment.
- Equipment - in this standard, equipped subracks, racks/cabinets and miscellaneous racks/cabinets.
- Integrator - the end user/operator of telecommunication or IT equipment, or their agent.
- Micro-climate - the local conditions inside the rack/cabinet that create the ambient seen by the subrack.
- Miscellaneous rack/cabinet - a freely configurable rack/cabinet that can hold subracks from different suppliers and types.
- ARCM - Any Rack/Cabinet and Miscellaneous Rack/Cabinet.
- MRC - Miscellaneous Rack/Cabinet.
Who uses SIST EN 300 119-5 V1.2.2:2006?
SIST EN 300 119-5 V1.2.2:2006 is used by equipment suppliers who need to design rack-mounted products for thermal performance, and by integrators who need data for room ventilation and rack configuration. It is also relevant to operators of telecommunication and information technology equipment in the public telecommunications network.
Typical users include mechanical and thermal engineers, quality managers, procurement teams buying rack-mounted equipment, and specialists supplying fan trays or air filters. They use it to choose airflow paths, check temperatures, collect characterization data, and review how equipment from different suppliers will work together in the same enclosure.
Which standards are used with SIST EN 300 119-5 V1.2.2:2006?
| Reference | What it contributes |
|---|---|
| ETSI EN 300 019 | Environmental conditions and environmental tests for telecommunications equipment |
| EN 60950-1 | Safety requirements for information technology equipment; used here for touchable parts and issuing air |
| ETSI EN 300 119-1 | Introduction and terminology for the EN 300 119 series |
| ETSI EN 300 019-1-3 | Classification of indoor, weatherprotected stationary environmental conditions |
| ETSI EN 300 119 | The parent equipment-practice series for rack, cabinet and subrack arrangements |
| ETSI TR 102 489 | Thermal management guidance for equipment and deployment |
What does the SIST EN 300 119-5 V1.2.2:2006 document contain?
The document contains a short requirements core and a detailed normative annex for thermal characterization data. Annex A sets out what manufacturers need to provide for identification, geometry, natural-convection behavior, forced-convection behavior, and extra MRC data such as openings, mounting obstructions, fan trays and air filters.
It also gives the measurement approach behind those data, including where air temperature and air velocity are taken and when obstruction tests are needed. Clause 2 lists the referenced standards, and the bibliography in Annex B points to IEC 60721.
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Frequently Asked Questions
SIST EN 300 119-5 V1.2.2:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 5: Thermal management". This standard covers: A standard for the thermal management of racks and cabinets defining preferred solutions for the removal of heat dissipated by one or more subracks in an ETSI rack. For example: air flow, direction of air, air velocity, permitted air temperature, necessity and type of air baffle. The starting point for the standard is to consider the ETSI mechanical dimensions as a non-modifiable item. The standard also has to define a possible preferred range for the power dissipation within an ETSI miscellaneous rack depending on different standardized solutions. The standards should be applicable to telecommunication and ITE equipment from different suppliers designed for the installation in an ETSI rack.
A standard for the thermal management of racks and cabinets defining preferred solutions for the removal of heat dissipated by one or more subracks in an ETSI rack. For example: air flow, direction of air, air velocity, permitted air temperature, necessity and type of air baffle. The starting point for the standard is to consider the ETSI mechanical dimensions as a non-modifiable item. The standard also has to define a possible preferred range for the power dissipation within an ETSI miscellaneous rack depending on different standardized solutions. The standards should be applicable to telecommunication and ITE equipment from different suppliers designed for the installation in an ETSI rack.
SIST EN 300 119-5 V1.2.2:2006 is classified under the following ICS (International Classification for Standards) categories: 19.040 - Environmental testing; 33.050.01 - Telecommunication terminal equipment in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 119-5 V1.2.2:2006 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2006
Okoljski inženiring (EE) – Evropski telekomunikacijski standard za prakso pri
opremi – 5. del: Ravnanje s toplotnimi lastnostmi opreme
Environmental Engineering (EE); European telecommunication standard for equipment
practice; Part 5: Thermal management
Ta slovenski standard je istoveten z: EN 300 119-5 Version 1.2.2
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
European Standard (Telecommunications series)
Environmental Engineering (EE);
European telecommunication standard
for equipment practice;
Part 5: Thermal management
2 ETSI EN 300 119-5 V1.2.2 (2004-12)
Reference
DEN/EE-TMG002
Keywords
environment, management, equipment practice,
rack
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ETSI
3 ETSI EN 300 119-5 V1.2.2 (2004-12)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.5
2 References.5
3 Definitions and abbreviations.5
3.1 Definitions.5
3.2 Abbreviations.6
4 General requirements.6
4.1 Thermal performance.6
4.2 Temperature of touchable parts .6
4.3 Temperature of issuing air.6
5 Thermal management.6
5.1 Subrack air flow paths.6
5.2 ARCM air flow paths .7
Annex A (normative): Equipment characterization data to be provided by the
manufacturer.8
A.1 General identification.8
A.1.1 Identification.8
A.1.2 Physical geometry.8
A.2 Equipment in natural convection.9
A.2.1 Temperature measurements.9
A.3 Equipment with built-in fans - forced convection.9
A.3.1 Temperature and air velocity measurements .10
A.4 Additional data for an MRC and ancillary components.10
A.4.1 MRC.10
A.4.2 Fan tray.11
A.4.3 Fan tray flow and heat transfer.11
A.4.4 Air filter.11
Annex B (informative): Bibliography.12
History .13
ETSI
4 ETSI EN 300 119-5 V1.2.2 (2004-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Environmental
Engineering (EE).
The present document is part 5 of a multi-part deliverable. Full details of the entire series can be found in part 1 [3].
The present document applies to all telecommunications rack/cabinet; miscellaneous rack/cabinets and subracks
forming part of the public telecommunications network.
National transposition dates
Date of adoption of this EN: 10 December 2004
Date of latest announcement of this EN (doa): 31 March 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2005
Date of withdrawal of any conflicting National Standard (dow): 30 September 2005
Introduction
The power density of equipment has been rising and will continue to do so for the foreseeable future. Equipment
suppliers have tried to overcome their thermal issues in isolation resulting in different solutions being developed. When
different racks from various suppliers are co-located they can have a detrimental effect on each other. The present
document specifies the thermal management requirements to prevent equipment having a detrimental thermal influence
on surrounding equipment.
ETSI
5 ETSI EN 300 119-5 V1.2.2 (2004-12)
1 Scope
The present document specifies the preferred thermal management solutions for subracks, racks/cabinets and
miscellaneous racks/cabinets (as described in EN 300 119 series [5]) installed indoors in restricted access locations (as
defined in EN 60950-1 [2]), for the removal of heat dissipated by one or more subracks in an ETSI rack.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ETSI EN 300 019: "Environmental Engineering (EE); Environmental conditions and
environmental tests for telecommunications equipment".
[2] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[3] ETSI EN 300 119-1: "Environmental Engineering (EE); European telecommunication standard for
equipment practice; Part 1: Introduction and terminology".
[4] ETSI EN 300 019-1-3: "Environmental Engineering (EE); Environmental conditions and
environmental tests for telecommunications equipment; Part 1-3: Classification of environmental
conditions; Stationary use at weatherprotected locations".
[5] ETSI EN 300 119: "Environmental Engineering (EE); European telecommunication standard for
equipment practice".
[6] ETSI TR 102 489: "Environmental Engineering (EE); European telecommunications standard for
equipment practice; Thermal Management Guidance for equipment and its deployment".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
ambient: spatial maximal temperature of the air entering the rack/cabinet
cabinet: free-standing and self-supporting enclosure for housing electrical and/or electronic equipment
NOTE: It is usually fitted with doors and/or panels, which may or may not be removable.
equipment: for the purposes of EN 300 119-5, the term equipment shall mean equipped subracks, racks/cabinets and
miscellaneous racks/cabinets
integrator: end user/operator of telecommunication or IT equipment or their agent (for example, an equipment
manufacturer could be an operator's agent)
ETSI
6 ETSI EN 300 119-5 V1.2.2 (2004-12)
micro-climate: conditions found within the rack/cabinet creating a local ambient for
...