SIST ETS 300 132-1 E1:2006
(Main)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
- Abstract
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 Vdc, ETS 300 132-2 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.
- 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 ETS 300 132-1 E1:2006 is the Slovenian adoption of ETS 300 132-1 from ETSI. It specifies the power supply interface at the input to telecommunications equipment when the ac supply is derived from dc sources. The document is aimed at equipment designers, power-supply suppliers, installers, test laboratories, and buyers who need compatible voltage, frequency, disturbance, protection, and inrush-current behavior at interface "A".
What does SIST ETS 300 132-1 E1:2006 specify?
SIST ETS 300 132-1 E1:2006 sets requirements for the stabilized ac power supply derived from dc sources and for the input of telecommunications equipment connected to interface "A". It is written to make the power source and the powered equipment work together predictably, especially when several load units share the same supply.
The scope is centered on a physical boundary called interface "A". That boundary matters in practice because the standard ties the electrical requirements, disturbance limits, and test conditions to one agreed point between the power supply system and the telecommunications equipment.
The document is organized into seven clauses and four informative annexes:
| Annex | What it covers |
|---|---|
| Annex A | Information and guide on safety |
| Annex B | Guide for measuring inrush current and transferring recorded pulses onto the limit chart |
| Annex C | Identification of interface A |
| Annex D | Bibliography |
Clause 1 states the scope. Clause 2 lists normative references. Clause 3 gives definitions and abbreviations. Clause 4 gives the electrical requirements. Clause 5 covers earthing and bonding, Clause 6 covers electrical safety requirements, and Clause 7 covers EMC requirements.
What are the key requirements of SIST ETS 300 132-1 E1:2006?
SIST ETS 300 132-1 E1:2006 is mainly about voltage quality, recovery behavior, protection, and inrush current at interface "A". The practical effect is that equipment connected to this interface should keep working within its defined operating range, survive defined abnormal conditions, and not upset the supply or other connected loads.
Supply characteristics and operating range
Clause 4 requires the ac power supply feeding interface "A" to be of the stabilized type, such as an inverter or an ac conditioner. The nominal supply voltage at interface "A" is 230 V ac, and the normal service voltage range is 207.0 to 253.0 V ac. The standard frequency range for normal service is 48 to 52 Hz.
In practice, this tells designers what the equipment must accept without losing normal service. It also tells purchasers and installers what kind of supply must be provided if the equipment is expected to operate to specification.
Behavior under abnormal voltage
Clause 4.3 requires telecommunications equipment operated by ac to avoid damage when the steady-state voltage falls in the abnormal range from 0 to 207.0 V ac. For 230/400 V / 50 Hz systems, the abnormal steady-state frequency tolerance is 45 Hz to 55 Hz.
This matters because the equipment may see a low-voltage or off-frequency condition and still be expected to survive. The standard also requires service to restore automatically once the supply returns to the normal range, and it says the abnormal voltage must not trip fuses, circuit breakers, or similar protection devices.
Interruptions, fluctuations, and recovery
Clause 4.5 allows short interruptions and fluctuations during automatic switching or secondary-voltage regulation, but the equipment must continue to function correctly if an interruption is 20 ms or less at nominal supply voltage. It also gives operating limits for slow voltage fluctuation and frequency variation, including static tolerance, short-duration rms limits, very short-duration actual-value limits, and frequency variation up to ±3 Hz with recovery within 5 seconds or less.
In practice, this is the part that matters for hold-up behavior, power-supply control, and system restart behavior. If equipment is sensitive to brief interruptions or to supply regulation steps, these limits define what it should be designed and tested to tolerate.
Protection and inrush current
Clause 4.6 says the supply to interface "A" shall be protected by fuses or circuit breakers, for example in a power distribution bay, and energizing equipment must not cause unwanted operation of those protection devices. Clause 4.7 then limits the surge current drawn when interface "A" is connected.
The inrush-current requirement is practical for system integration. It prevents one load from causing nuisance trips or stressing the shared distribution hardware, especially where several load units are connected to the same power supply.
How the inrush current is checked
Clause 4.7.2 specifies the measurement setup for surge current testing, using a line impedance stabilization network (LISN), a recording device, and equipment powered at nominal secondary voltage and rated load. Clause 4.7.1 defines the limit as a ratio between instantaneous surge current and maximum current, and Annex B explains how to capture pulses and plot them against the limit curve in figure 2.
This means the test is not just about a peak number. It is about how the current pulse behaves over time, which is important when specifying protective devices and verifying that the supply network will remain stable.
Earthing, safety, and EMC
Clause 5 points to ETS 300 253 for earthing and bonding in telecommunications centres. Clause 6 links the interface safety requirement to EN 60950 for hazardous voltages, and Clause 7 points EMC requirements to ETS 300 386-1.
For a project team, this means the power interface standard does not stand alone. It has to be used together with earthing, safety, and EMC documents when the installation and the equipment are designed and assessed.
What terms does SIST ETS 300 132-1 E1:2006 define?
- abnormal voltage range - The steady-state voltage range in which the equipment is not expected to maintain normal service, but should survive without damage.
- interface "A" - The terminals where the ac power supply connects to the telecommunications equipment.
- nominal load conditions - A defined set of values used for test performance.
- normal service voltage range - The steady-state voltage range in which the equipment is expected to maintain normal service.
- normal service - The operating mode in which the telecommunications equipment works within its specification.
- power supply - The power source intended to feed the telecommunications equipment.
- system block - A functional group of equipment whose operation and performance depend on connection to the same power supply.
- telecommunication centre - A location where telecommunications equipment is installed and which is under the sole responsibility of the operator.
Who uses SIST ETS 300 132-1 E1:2006?
SIST ETS 300 132-1 E1:2006 is used by telecommunications equipment manufacturers, power-system suppliers, and installers who need a common ac interface for equipment powered from dc-derived sources. It is also used by test laboratories and quality teams when checking voltage tolerance, recovery behavior, protection coordination, and inrush current.
Operators of telecommunications centres use it when agreeing the interface boundary and the conditions under which equipment may be connected. Buyers and specifiers use it to compare equipment and power installations against the same electrical interface expectations.
Which standards are used with SIST ETS 300 132-1 E1:2006?
SIST ETS 300 132-1 E1:2006 relies on several referenced documents for safety, earthing, voltage, and EMC topics:
- ETS 300 132-2 - Provides the related part for dc-operated power supply interfaces.
- ETS 300 253 - Covers earthing and bonding of telecommunications equipment in telecommunication centres.
- EN 41003 - Gives particular safety requirements for equipment connected to telecommunications networks.
- EN 60950 - Covers safety of information technology equipment, including electrical business equipment.
- IEC 38 - Supplies the standard voltage values used as a reference for ac systems.
- IEC 364-4-41 - Covers protection against electric shock in building electrical installations.
- IEC 686 - Covers stabilized power supplies with ac output.
- ETS 300 386-1 - Covers EMC requirements, including test levels and compliance criteria.
- IEC 364-5-54 - Covers earthing arrangements and protective conductors.
These references tell the reader where to look for safety, voltage, earthing, and EMC details that are outside the power-interface requirements themselves.
What does the SIST ETS 300 132-1 E1:2006 document contain?
The document contains a simple physical identification of interface "A" in figure 1, a limit curve for inrush current in figure 2, and a surge-current test circuit in figure 3. Those figures are used for design checks and laboratory testing of the interface behavior.
Annex B gives practical guidance for measuring inrush current and transferring measured pulses onto the limit chart. Annex C gives an example configuration for identifying interface "A" in a system. Annex A provides safety guidance, and Annex D lists additional bibliography items for disturbance, immunity, and EMC topics.
Get Certified
Connect with accredited certification bodies for this standard
ANCE
Mexican certification and testing association.
Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
LNE (Laboratoire National de Métrologie et d'Essais)
French national laboratory for metrology and testing.
Sponsored listings
Frequently Asked Questions
SIST ETS 300 132-1 E1:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "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". This standard covers: 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 Vdc, ETS 300 132-2 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.
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 Vdc, ETS 300 132-2 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.
SIST ETS 300 132-1 E1:2006 is classified under the following ICS (International Classification for Standards) categories: 33.050.01 - Telecommunication terminal equipment in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ETS 300 132-1 E1:2006 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
,QåHQLULQJRSUHPH (( ±1DSDMDOQLYPHVQLNQDYKRGXYWHOHNRPXQLNDFLMVNR
RSUHPR±GHO 2EUDWRYDQMH]L]PHQLþQRQDSHWRVWMR DF GREOMHQRL]HQRVPHUQLK
GF YLURY
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
Page 2
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.
Page 3
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
Page 4
ETS 300 132-1: September 1996
Blank page
Page 5
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
Page 6
ETS 300 132-1: September 1996
Blank page
Page 7
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.
Page 8
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".
Page 9
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
...