SIST ETS 300 119-4 E1:2006

• Abstract:

  This part of European Telecommunication Standard (ETS) 300 119 details requirements for subracks for use in miscellaneous racks/cabinets, as described in ETS 300 119-3 [4]. The subrack will normally be supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units, etc.

• Status: Published
• Publication Date: 31-Jan-2006
• ICS: 33.050.01 - Telecommunication terminal equipment in general
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2006
• Due Date: 01-Feb-2006
• Completion Date: 01-Feb-2006
• Ref Project: ETSI ETS 300 119-4 ed.1 (1994-01) - Equipment Engineering (EE); European telecommunication standard for equipment practice; Part 4: Engineering requirements for subracks in miscellaneous racks and cabinets

SIST ETS 300 119-4 E1:2006 is the Slovenian adoption of ETS 300 119-4 Edition 1 from ETSI. It specifies engineering requirements for subracks used in miscellaneous racks and cabinets for telecommunication equipment in public telecommunications networks. The standard is written for equipment designers, subrack suppliers, and the people who need to check fit, cooling, handling, safety, and EMC-related aspects in practice.

What does SIST ETS 300 119-4 E1:2006 specify?

SIST ETS 300 119-4 E1:2006 sets requirements for subracks used in miscellaneous racks/cabinets as described in ETS 300 119-3. The subrack may be supplied as a fully assembled structure, unequipped, partially equipped, or fully equipped with plug-in units.

The document is organized into scope, normative references, dimensions, accessibility, heat dissipation, weight, temperature limits, and electromagnetic compatibility and electrostatic discharge requirements.

Annex	What it covers
Annex A	Illustrative figures for the subrack and its interfaces
Annex B	The IEC Sub Committee 48D publication used as the mechanical basis, including noted deviations

What are the key requirements of SIST ETS 300 119-4 E1:2006?

SIST ETS 300 119-4 E1:2006 focuses on fit, cooling, handling, and safety for subracks in telecom equipment systems. In practice, it tells a supplier what has to be designed into the subrack and what information should be available to users and operators.

• Dimensions, clause 3 - The equipped subrack dimensions must include plug-in units, switches, lamps, cooling fins, connectors, and similar protrusions. This matters because the finished assembly, not just the bare frame, has to fit the rack/cabinet interface defined in Table 1 and Annex A.
• Accessibility, clause 4 - Subracks for 300 mm deep miscellaneous racks/cabinets need front access only. This supports installation where units are placed back-to-back or against a wall.
• Heat dissipation, clause 5 - Natural convection is the primary cooling method, and the mechanical design should promote it. Assisted cooling is only for cases where natural convection is not enough, so thermal design work has to start with passive airflow.
• Temperature control, clause 5 - A fully equipped subrack must not drive components above the limits given by their suppliers across the selected operating ambient range from ETS 300 019. In practice, the supplier needs component temperature data and must be able to show that the design meets it.
• Thermal planning data, clause 5.3 - On request, the supplier provides the nominal total dissipation of the equipped subrack and other data for rack/cabinet thermal planning. This helps operators size ventilation and avoid overheating at system level.
• Weight and handling, clause 6 - Unequipped subracks have a maximum weight of 18 kg unless another arrangement is agreed. For equipped subracks, the supplier supplies total weight data so floor loading for telecommunication centres and customer sites can be checked.
• Touch temperature and EMC, clauses 7 and 8 - Touchable parts must follow the temperature rise limits in EN 60 950, and higher room ambient temperatures require reduced limits. Clause 8 ties the subrack to EMC requirements under Directive 89/336/EEC and the relevant existing and emerging EMC standards.

What terms does SIST ETS 300 119-4 E1:2006 define?

• Equipment Engineering (EE) - The ETSI technical area covering equipment practice for telecom hardware.
• European Telecommunications Standards Institute (ETSI) - The organization that produced the ETS.
• Electromagnetic compatibility (EMC) - The ability of the subrack and its equipment to operate without causing or suffering unacceptable electromagnetic disturbance.
• Subrack - The assembly that holds plug-in units inside a rack or cabinet.
• Miscellaneous rack/cabinet - The rack/cabinet type covered by ETS 300 119-3 and used as the installation environment for this part.
• Coordination dimension - A reference dimension used to coordinate mechanical interfaces; it is not a manufacturing tolerance dimension.
• Actual dimension - The real made dimension of the part, as opposed to the coordination reference.

Who uses SIST ETS 300 119-4 E1:2006?

SIST ETS 300 119-4 E1:2006 is used by subrack designers, equipment manufacturers, and system integrators who need a common mechanical basis for telecom equipment in public networks. It is also used by suppliers who must provide temperature, dissipation, and weight data to administrations, operators, and customers.

In practice, it helps with product design, mechanical compatibility checks, thermal planning, handling and logistics planning, and safety review for installed equipment.

What changed in SIST ETS 300 119-4 E1:2006 from the previous edition?

SIST ETS 300 119-4 E1:2006 is identified as ETS 300 119-4 Edition 1. The document history notes the first edition in January 1994 and a later conversion into PDF in February 1996.

Which standards are used with SIST ETS 300 119-4 E1:2006?

• EN 60 950 (1988) - Supplies the safety basis for the temperature rise limits on touchable parts.
• Council Directive 89/336/EEC - Provides the EMC legal framework referenced in clause 8.
• ETS 300 019 - Supplies the environmental conditions and test range used for thermal design.
• ETS 300 119-3 - Defines the miscellaneous racks/cabinets in which these subracks are used.
• IEC 917-2 - Gives the interface-coordination basis for the 25 mm equipment practice; Annex B notes deviations from it.
• IEC 917-2-2 - Mentioned in Annex B as the source for tolerances on specific dimensions.

What does the SIST ETS 300 119-4 E1:2006 document contain?

The document includes a dimension framework for subracks, with Table 1 and Annex A figures showing the interface coordinates and relationships between actual and coordination dimensions. It also includes thermal guidance for natural convection, component temperature checks, and thermal planning data that suppliers may need to provide.

It contains handling guidance through the weight limits and the requestable total weight of an equipped subrack. It also includes safety-related touch temperature requirements and a clause linking the design to EMC considerations. Annex B explains the IEC publication used as the basis and where this ETS departs from it.

SLOVENSKI STANDARD
01-februar-2006
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Equipment Engineering (EE); European telecommunication standard for equipment
practice; Part 4: Engineering requirements for subracks in miscellaneous racks and
cabinets
Ta slovenski standard je istoveten z: ETS 300 119-4 Edition 1
ICS:
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 ETS 300 119-4
TELECOMMUNICATION January 1994
STANDARD
Source: ETSI TC-EE Reference: DE/EE-3001.3
ICS: 33.080
Equipment, racks, subracks
Key words:
Equipment Engineering (EE);
European telecommunication standard for equipment practice
Part 4: Engineering requirements for subracks in miscellaneous
racks and cabinets
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1994. All rights reserved.
New presentation - see History box

Page 2
ETS 300 119-4: January 1994
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

Page 3
ETS 300 119-4: January 1994
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Dimensions for subracks.7
4 Accessibility.7
5 Heat dissipation.7
5.1 Subrack heat management.7
5.2 Component temperature.8
5.3 Miscellaneous rack/cabinet thermal planning.8
6 Weight .8
6.1 Unequipped subrack.8
6.2 Equipped subrack .8
7 Temperature limits .8
8 Electromagnetic compatibility and electrostatic discharge requirements.8
Annex A (informative): Illustrative figures.10
Annex B (informative): IEC Sub Committee 48D publication.12
History.13

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ETS 300 119-4: January 1994
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ETS 300 119-4: January 1994
Foreword
This European Telecommunication Standard (ETS) has been produced by the Equipment Engineering
(EE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS is part 4 of a 4 part ETS aimed at setting out, on a common basis, the engineering requirements
for telecommunication practice, for housing equipment forming part of a public telecommunications
network. Part 1 is a general introduction and explains the terminology used, Part 2 specifies the
engineering requirements for racks and cabinets and Part 3 specifies the engineering requirements for
miscellaneous racks and cabinets. This part, Part 4, specifies the engineering requirements for subracks
mounted in miscellaneous racks and cabinets.
This ETS applies to all telecommunications equipment forming part of the public telecommunications
network. The requirements for subracks mounted in miscellaneous racks/cabinets, which this part lays
down, are based on the work of IEC Technical Committee 48D. However, in this part of the ETS deviation
from the work of IEC Sub Committee 48D occurs (see Annex B).
Illustrative figures are contained in Annex A.

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ETS 300 119-4: January 1994
Blank page
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ETS 300 119-4: January 1994
1 Scope
This part of European Telecommunication Standard (ETS) 300 119 details requirements for subracks for
use in miscellaneous racks/cabinets, as described in ETS 300 119-3 [4]. The subrack will normally be
supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units,
etc.
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated referenc
...