SIST ETS 300 132-1 E1:2006

SLOVENSKI STANDARD
SIST ETS 300 132-1 E1:2006
01-februar-2006
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Equipment Engineering (EE); Power supply interface at the input to telecommunications
equipment; Part 1: Operated by alternating current (ac) derived from direct current (dc)
sources
Ta slovenski standard je istoveten z: ETS 300 132-1 Edition 1
ICS:
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
SIST ETS 300 132-1 E1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 132-1 E1:2006

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SIST ETS 300 132-1 E1:2006
EUROPEAN ETS 300 132-1
TELECOMMUNICATION September 1996
STANDARD
Source: ETSI TC-EE Reference: DE/EE-02001.1
ICS: 33.020
Key words: Power supply
Equipment Engineering (EE);
Power supply interface at the input to
telecommunications equipment;
Part 1: Operated by alternating current (ac)
derived from direct current (dc) sources
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
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 1996. All rights reserved.

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ETS 300 132-1: September 1996
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.

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SIST ETS 300 132-1 E1:2006
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ETS 300 132-1: September 1996
Contents
Foreword .5
1 Scope .7
2 Normative references.8
3 Definitions and abbreviations .9
3.1 Definitions .9
3.2 Abbreviations .9
4 Requirements.10
4.1 Nominal value of the supply voltage .10
4.2 Normal service voltage range at interface "A" .10
4.3 Abnormal service voltage ranges at interface "A".10
4.3.1 Abnormal service voltage under steady-state conditions.10
4.3.2 Recovery from steady state abnormal voltage.11
4.4 Abnormal service voltage under temporary conditions.11
4.5 Voltage changes due to the regulation of secondary voltage .11
4.6 Supply protection at interface "A".11
4.7 Surge current on connection of interface "A".11
4.7.1 Limits.11
4.7.2 Measurement method .12
4.7.3 Protective device ratings .13
5 Earthing and bonding .13
6 Electrical safety requirements .13
6.1 General .13
7 EMC requirements .13
Annex A (informative): Information and guide on safety .14
Annex B (informative): Guide for measuring inrush current and for transferring the recorded pulses
onto the limit chart .15
B.1 Measurement .15
B.2 Pulse waveform transformation.15
Annex C (informative): Identification of interface A .17
Annex D (informative): Bibliography.18
History.19

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ETS 300 132-1: September 1996
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ETS 300 132-1: September 1996
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 details the requirements for the interface between telecommunications equipment and its power
supply, and includes requirements relating to its stability and measurement. Normative references are
also made to the safety aspects, in various IEC and CENELEC documents. Informative references and
detailed measurement and test arrangements are contained in informative annexes.
This ETS consists of 2 parts as follows:
Part 1: "Operated by alternating current (ac) derived from direct current (dc) sources"
Part 2: "Operated by direct current (dc)"
Transposition dates
Date of adoption of this ETS: 16 August 1996
Date of latest announcement of this ETS (doa): 31 December 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 June 1997
Date of withdrawal of any conflicting National Standard (dow): 30 June 1997

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ETS 300 132-1: September 1996
1 Scope
This European Telecommunication Standard (ETS) contains requirements for:
- the output performance of the (stabilized) ac power supply derived from dc sources as specified in
ETS 300 132-2 [9]; and
- the input of the telecommunications equipment connected to interface "A", powered by ac not
directly provided by the mains.
This ETS also makes reference to safety and EMC standards which are in accordance with the relevant
European and international standards.
This ETS aims at providing compatibility between the power supply equipment and the power consuming
telecommunications equipment, and also between different load units connected to the same power
supply.
NOTE 1: To ensure satisfactory performance, the connection of telecommunications equipment
into installations is subject to the prevailing conditions of that installation and is subject
to the agreement of both parties.
NOTE 2: For dc power supply systems operated at a nominal voltage of -48 V , ETS 300 132-2
dc
is available.
The power supply interface, interface "A" of figure 1, is a physical point to which all the requirements are
related. This point is situated between the power supply system(s) and the power consuming
telecommunications equipment.
NOTE 3: Interface "A" is located at the power terminals of the telecommunications equipment.
Subject to the installation preconditions, this point may be located at any other point
between the power supply system and the telecommunications equipment by mutual
agreement of both parties.
The requirements at interface "A" apply to:
- the output of the power supply equipment or power supply installation of telecommunications
centres;
- the power supply input of telecommunications equipment installed at telecommunication centres;
- telecommunications equipment, installed in customers' premises, whose power interface "A" is also
used by equipment requiring a supply to this specification.
NOTE 4: Normally there is more than one load unit connected to interface "A". In some of these
cases interface "A" might undergo further restrictions with respect to noise limits or
other disturbances.
NOTE 5: This ETS also gives requirements on disturbances on the power supply interface "A".
However, continuous wave phenomena above 20 kHz are not covered within this ETS.
ETS 300 386-1 [8] is applicable for this frequency range.
NOTE 6: The transients to which immunity is specified in this ETS are characterized by a high
energy content such that electrical stress may be caused. Fast transients, the effects
of which appear mainly as interference, are covered by ETS 300 386-1 [8].
NOTE 7: An example of a configuration in which the interface "A" is identified is given in
annex C.

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ETS 300 132-1: September 1996
L
telecommunications
N
equipment
PE
ac power supply conductors
system block
interface A
Figure 1: General identification of the power interface, interface "A"
The purpose of this ETS is:
- to enable the use of a power supply system with the same characteristics for all
telecommunications equipment defined in the area of application;
- to facilitate interworking of different (types of) load units;
- to facilitate the standardization of telecommunications equipment;
- to facilitate the installation, operation and maintenance in the same network of equipment and
telecommunications systems from different origins.
2 Normative references
This ETS incorporates by dated and 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 references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 253: "Equipment Engineering (EE); Earthing and bonding of
telecommunication equipment in telecommunication centres".
[2] EN 41003 (1991): "Particular safety requirements for equipment to be connected
to telecommunication networks".
[3] EN 60950 (1992 amended 1993): "Safety of information technology equipment,
including electrical business equipment".
[4] IEC 38 (1983): "IEC standard voltages".
[5] IEC 364-4-41 (1982): "Electrical installations of buildings - Part 4: Protection for
safety - Chapter 41: Protection against electric shock".

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ETS 300 132-1: September 1996
[6] IEC 664 (1992): "Insulation co-ordination for equipment within low voltage
systems".
[7] IEC 686 (1980): "Stabilized power supplies, ac output".
[8] ETS 300 386-1 (1994): "Equipment Engineering (EE); Public telecommunication
network equipment; Electro-Magnetic Compatibility (EMC) requirements;
Part 1: Product family overview, compliance criteria and test levels".
[9] ETS 300 132-2 (1996): "Equipment Engineering (EE); Power supply interface at
the input to telecommunications equipment; Part 2: Operated by direct current
(dc)".
[10] IEC Publication 364-5-54: "Electrical installations of buildings - Part 5: Selection
and erection of electrical equipment - Chapter 54: Earthing arrangements and
protective conductors".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
abnormal voltage range: The range of steady-state voltages over which the equipment will not be
expected to maintain normal service but will survive undamaged.
interface "A": The terminals at which the ac power supply is connected to the telecommunications
equipment (see figure 1).
NOTE 1: This is a functional definition and not an exact depiction of the physical location.
nominal load conditions: A set of values dedicated to a test perfor
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