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EUROPEAN STANDARD
Environmental Engineering (EE);
Power supply interface at the input to Information and
Communication Technology (ICT) equipment;
Part 1: Alternating Current (AC)
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2 ETSI EN 300 132-1 V2.1.1 (2019-03)
Reference
REN/EE-0264
Keywords
environment, interface, power supply
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3 ETSI EN 300 132-1 V2.1.1 (2019-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Power Interface A1 . 9
5 AC interface requirements A1 . 10
5.0 Introduction . 10
5.1 Nominal voltage at interface A1 . 11
5.2 Normal service voltage range categories at interface A1 . 11
5.3 Reference test voltage (U ) at interface A1 . 12
T
5.4 Abnormal service voltage ranges at interface A1 . 12
6 Voltage variations, voltage dips, short interruptions and voltage surges at interface A1 . 13
6.0 Introduction . 13
6.1 Voltage variations. 13
6.2 Voltages dips . 14
6.3 Short interruptions . 15
6.4 Voltage surges . 15
7 AC Supply protection on interface A1 . 16
8 Maximum steady state current I in the normal service voltage range at interface A1 . 17
m
9 Inrush current on interface A1 . 17
9.1 Limits . 17
9.2 Measurement method . 18
9.3 Protective device ratings . 19
10 Earthing and Bonding . 19
11 Electrical Safety requirements . 19
12 EMC requirements at the input of ICT equipment . 19
Annex A (informative): ICT power supply configurations providing a unified power interface
in the present document . 20
Annex B (normative): Identification of interface A1 . 22
Annex C (informative): Calculation of the extreme AC voltage range at interface A1 . 23
Annex D (informative): Dimensioning of over-current protective devices . 24
Annex E (normative): Test generator for voltage dips, short interruptions and voltage
variations . 25
Annex F (informative): Details of the voltage surges measurement in the most common case
of distribution and protective devices . 26
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4 ETSI EN 300 132-1 V2.1.1 (2019-03)
Annex G (informative): Guide for measuring inrush current and for transferring the
recorded pulses onto the limit chart . 27
G.1 Measurement . 27
G.2 Pulse waveform transfor mation . 27
History . 29
ETSI
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5 ETSI EN 300 132-1 V2.1.1 (2019-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).
The present document is part 1 of a multi-part deliverable covering Environmental Engineering (EE); Power supply
interface at the input to Information and Communication Technology (ICT) equipment, as identified below:
Part 1: "Alternating Current (AC)";
Part 2: "-48 V Direct Current (DC)";
Part 3: "Up to 400 V Direct Current (DC)";
National transposition dates
Date of adoption of this EN: 8 March 2019
Date of latest announcement of this EN (doa): 30 June 2019
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 December 2019
Date of withdrawal of any conflicting National Standard (dow): 31 December 2019
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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6 ETSI EN 300 132-1 V2.1.1 (2019-03)
1 Scope
The present document contains requirements for:
• the output of the power supply feeding interface A1;
• the input of the ICT equipment connected to interface A1.
The voltage at interface A1 defined in the present document is single phase and three phase AC.
The following voltage range categories are covered:
• Narrow single phase A1 and narrow three phase A1 AC voltage range defined to comply with nominal
n-1p n-3p
European AC voltages [i.2].
• Wide single phase A1 and wide three phase A1 AC voltage range for worldwide nominal AC voltages.
w-1p w-3p
The present document aims at providing compatibility between the power supply equipment and both the ICT equipment,
and the different load units connected to the same interface A1 (e.g. control/monitoring, cooling system, etc.).
The purpose of the present document is:
• to identify a power supply system with the same characteristics for all ICT equipment defined in the area of
application; the area of application may be any location where the interface A1 is used i.e. telecommunication
centres, Radio Base Stations, datacentres and customer premises;
• to facilitate interworking of different (types of) loads;
• to facilitate the standardization of power supply systems for ICT equipment;
• to facilitate the installation, operation and maintenance in the same network of ICT equipment and systems
from different origins. General requirements for safety and EMC are out of the scope of the present document
series unless specific requirement not defined in existing safety or EMC standards.
The present document concerns the requirements for the interface between Information and Communication
Technology (ICT) equipment and its power supply. It includes requirements relating to its stability and measurement.
Various other references and detailed measurement and test arrangements are contained in informative annexes.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60947-2: "Low-voltage switchgear and controlgear - Part 2: Circuit-breakers".
[2] IEC 60269-1: "Low-voltage fuses - Part 1: General requirements".
[3] IEC 61000-4-5: "Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test".
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7 ETSI EN 300 132-1 V2.1.1 (2019-03)
[4] IEC 61000-4-11: "Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions and voltage variations immunity tests".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI ETS 300 132-1 (Edition 1): "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".
[i.2] IEC 60038: "IEC standard voltages".
[i.3] IEC 60050-601: "International Electrotechnical Vocabulary. Chapter 601: Generation,
transmission and distribution of electricity - General".
[i.4] Void.
[i.5] ETSI EN 300 386: "Telecommunication network equipment; ElectroMagnetic Compatibility
(EMC) requirements; Harmonised Standard covering the essential requirements of the Directive
2014/30/EU".
[i.6] Void.
[i.7] CENELEC EN 62368-1 (Ed. 1.0): "Audio/Video, Information and Communication Technology
Equipment - Part 1: Safety requirements".
[i.8] IEC 60445: "Basic and safety principle for man-machine interface, marking and
identification - Identification of equipment terminals, conductor terminations, and conductors".
[i.9] IEC 60898-1:2015: "Electrical accessories - Circuit-breakers for overcurrent protection for
household and similar installations - Part 1: Circuit-breakers for a.c. operation".
[i.10] IEC 60898-2: " Electrical accessories - Circuit-breakers for overcurrent protection for household
and similar installations - Part 2: Circuit-breakers for AC and DC operation".
[i.11] IEC 60364 series: "Low-voltage electrical installations".
[i.12] IEC 62040 series: "Uninterruptible power systems (UPS)".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
abnormal service voltage ranges: steady-state voltage ranges over which the ICT equipment will not be expected to
maintain normal service but will survive undamaged
area of application: any location where the interface A1 is used i.e. telecommunication centres, Radio Base Stations,
datacentres and customer premises
customer premises: location which is the sole responsibility of the customer
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8 ETSI EN 300 132-1 V2.1.1 (2019-03)
ICT equipment: device, in the telecommunication network infrastructure, that provides an ICT service
interface A: interface, physical point, at which -48 VDC power supply is connected in order to operate the ICT
equipment
interface A1: interface, physical point, at which AC power supply is connected in order to operate the ICT equipment
NOTE: A1 and A1 are used for different voltage ranges: narrow and wide respectively.
n w
interface A3: interface, physical point, at which 400 VDC power supply is connected in order to operate the ICT
equipment
load unit: power consuming equipment, that is part of a system block
nominal voltage: value of the voltage by which the electrical installation or part of the electrical installation is
designated and identified
NOTE: This definition is based on nominal voltage defined in IEC 60050-601 [i.3].
normal service: service mode where ICT equipment operates within its specification
normal service voltage range: range of the steady-state voltage at the A1 interface over which the equipment will
maintain normal service
power supply: power supply to which ICT equipment is intended to be connected
reference test voltage: voltage used as a reference to define the test voltage in the present document
NOTE: The test voltage may be also a percentage of this voltage.
system block: functional group of ICT equipment depending for its operation and performance on its connection to the
same power supply
telecommunication centre: any location where ICT equipment is installed and is the sole responsibility of the operator
3.2 Symbols
For the purposes of the present document, the following symbols apply:
I maximum steady state current drain at interface A1
m
I instantaneous surge current at interface A1
t
I maximum steady state current drain at U at interface A1
UT T
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
NOTE: Also when used as a suffix to units of measurement.
DC Direct Current
NOTE: Also when used as a suffix to units of measurement.
EMC ElectroMagnetic Compatibility
EUT Equipment Under Test
ICT Information and Communication Technology
L Phase conductor
LISN Line Impedance Stabilization Networks
N Neutral conductor
PE Protective Earth
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9 ETSI EN 300 132-1 V2.1.1 (2019-03)
RMS Root Mean Square
U Reference Test Voltage
T
UPS Uninterruptible Power Supply
VAC Volts Alternating Current
VDC Volts Direct Current
4 Power Interface A1
The power supply interface, interface A1 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 ICT equipment of the area of
application defined in the scope of the present document.
An example of configurations in which interface A1 is identified is given in annex B.
Interface A1 is located at the power terminals of the ICT equipment or system as defined by the manufacturer in
accordance to IEC 60445 [i.8].
NOTE 1: Subject to the installation preconditions, this point may be located at any other point between the power
supply system and the ICT equipment by mutual agreement of the relevant parties.
NOTE 2: The power supply can be derived from AC grid e.g. through AC bypass of UPS or inverters.
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10 ETSI EN 300 132-1 V2.1.1 (2019-03)
ICT Equipment
A1
(L) Live AC terminal in single phase supply.
(N) Neutral AC terminal.
PE Protective Earth.
ICT Equipment
A1
(L1, L2, L3) Live AC terminals in 3 phases supply.
(N) Optional Neutral AC terminal.
PE Protective Earth.
Figure 1: General identification of the interface A1 in single and 3 phase AC supply
5 AC interface requirements A1
5.0 Introduction
The definition of the AC interface voltages ranges and typical operating voltage values are defined in the following
subclauses of clause 5.
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11 ETSI EN 300 132-1 V2.1.1 (2019-03)
5.1 Nominal voltage at interface A1
The nominal voltage is a definition used to enable differentiating power interfaces.
The nominal voltage for an AC sgrid source of 230 V single phase and 400 V three phase is defined according to
IEC 60038 [i.2].
In addition, a wide worldwide nominal single phase AC voltage range from 100 V to 240 V is commonly used, along
with a corresponding nominal 3 phase voltage range from 173 V to 415 V.
5.2 Normal service voltage range categories at interface A1
The normal service voltage range categories at powering interface A1 of ICT equipment shall be as follows:
Narrow voltage range - Single phase:
• A1 single phase minimum voltage: 197 VAC RMS (line to neutral interface)
n-1p
• A1 single phase maximum voltage: 253 VAC RMS (line to neutral interface)
n-1p
NOTE 1: The minimum voltage at interface A1 is calculated as 230 V nominal -10 % at the incoming supply
n-1p
terminals of a building and a further -4 % maximum voltage drop allowance on the AC distribution within
the building.
NOTE 2: The maximum voltage at interface A1 is calculated as 230 V nominal +10 %.
n-1p
Narrow voltage range - Three phase:
• A1 three phase minimum voltage:
n-3p
- 344 VAC RMS for line to line interface; or
- optionally same voltage as narrow single phase minimum voltage for line to neutral interface.
• A1 three phase maximum voltage:
n-3p
- 440 VAC RMS for line to line interface; or
- optionally same voltage as narrow single phase maximum voltage in case of line to neutral interface.
NOTE 3: The minimum voltage at interface A1 is calculated as 400 V nominal -10 % at the incoming supply
3p-n
terminals of a building and a further -4 % maximum voltage drop allowance on the AC distribution within
the building.
NOTE 4: The maximum voltage at interface A1 is calculated as 400 V nominal +10 %.
3p-n
Wide voltage range - Single phase:
• A1 single phase minimum voltage: 86 VAC RMS (line to neutral interface).
w-1p
• A1 single phase maximum voltage: 264 VAC RMS (line to neutral interface).
w-1p
NOTE 5: The minimum voltage at interface A1 is calculated as 100 V nominal -10 % at the incoming supply
w-1p
terminals of a building and a further -4 % maximum voltage drop allowance on the AC distribution within
the building.
NOTE 6: The maximum voltage at interface A1 is calculated as 240 V nominal +10 %.
w-1p
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12 ETSI EN 300 132-1 V2.1.1 (2019-03)
Wide voltage range - Three phase:
• A1 minimum voltage:
w-3p
- 149 VAC RMS for line to line interface; or
- optionally same voltage as narrow single phase minimum voltage for line to neutral interface.
• A1 maximum voltage:
w-3p
- 456 VAC RMS for line to line interface; or
- optionally same voltage as narrow single phase maximum voltage for line to neutral interface.
NOTE 7: The minimum voltage at interface A1 is calculated as 173 V nominal -10 % at the incoming supply
w-3p
terminals of a building and a further -4 % maximum voltage drop allowance on the AC distribution within
the building.
NOTE 8: The maximum voltage at interface A1 is calculated as 415 V nominal +10 %.
w-3p
5.3 Reference test voltage (U ) at interface A1
T
The reference test voltage (U ) for ICT equipment shall be:
T
1) U = 230 V for single phase or 3 phase line to neutral equipment (test voltage for narrow voltage range)
T
2) U = 400 V for three phase equipment (test voltage for narrow voltage range line to line)
T
Two test voltages shall be used for wide voltage range equipment:
1) U = 100 and U = 240 V for single phase or 3 phase line to neutral equipment (test voltage for wide voltage
T T
range)
2) U = 173 and U = 415 V for three phase equipment (test voltage for wide voltage range line to line)
T T
NOTE: The powering solution should work in any site even with very long power cables i.e. U at the input of
T
ICT equipment is lower than power supply output. For constant power ICT equipment, the current is
increasing as a function of decreasing voltage.
5.4 Abnormal service voltage ranges at interface A1
The ICT equipment may be subject to steady state voltage out of the normal service voltage range. Limits of abnormal
service voltage range are defined as follows:
• 0 V < U < 197 V for narrow range single phase (line to neutral interface)
• 0 V < U < 86 V for wide range single phase (line to neutral interface)
• 0 V < U < 344 V for narrow range three phase (line to line interface)
• 0 V < U < 149 V for wide range three phase (line to line interface)
After the restoration of the supply from the abnormal service voltage range to the normal service voltage range, the ICT
equipment shall fulfil the following performance criteria:
• the ICT equipment shall not suffer any damage;
• the ICT equipment shall be able to automatically resume operation according to its specifications when the
voltage comes back into the normal service voltage range.
NOTE: The second criterion implies that abnormal service voltage should not lead to the disconnection of power
supply units e.g. by causing circuit breakers, fuses or other such devices to operate.
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13 ETSI EN 300 132-1 V2.1.1 (2019-03)
6 Voltage variations, voltage dips, short interruptions
and voltage surges at interface A1
6.0 Introduction
Under abnormal conditions, voltage values outside the normal service voltage range may occur for short time.
The deviations from the steady-state voltage at the A1 interface may be caused by:
• Voltage variations.
• Voltage dips.
• Voltage interruptions.
• Voltage surges.
The tests for voltage dips, short interruption and voltage variations shall be conducted in accordance with standard
IEC 61000-4-11 [4], annex E.
NOTE 1: Clause 6.1.1 of IEC 61000-4-11 [4] defines generator output impedance.
The tests for voltage surges shall be conducted in accordance with standard IEC 61000-4-5 [3].
Specific criteria to ICT equipment are defined in each test table below. The tests shall be performed on individual
modules/subsystems.
The test shall be done at the test voltages corresponding to the voltage range of the product defined in clause 5.3.
In 3 phases, the defined tests shall be done on 1, 2 and 3 phases, to cover all events (grid disturbance from or
interruption, local line short circuit, etc.).
NOTE 2: Clause 6 states the minimum requirements at A1 power interface to Telecom/ICT input interface when
power supply includes a bypass with AC input. Higher immunity levels may be required when equipment
is directly connected to public utility AC grid.
For all the following tests compliance criteria are defined as:
Criteria a): The EUT shall continue to operate as intended during and after the test. No degradation of
performance or loss of function is allowed below a performance level specified by the
manufacturer, when the apparatus is used as intended.
Criteria b): Temporary loss of function or degradation of performance, which ceases after the disturbance
ceases, and from which the EUT recovers its normal performance, without operator intervention.
NOTE 3: In the present document, the EUTs is the ICT equipment.
6.1 Voltage variations
The purpose of the following tests are not to check equipment dynamic behaviour during rise and fall times from U to
T
minimum or maximum voltage of the voltage range and then back to U . Therefore dV/dt are not specified. The
T
voltages values, testing times and test criteria are defined in the following tables.
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14 ETSI EN 300 132-1 V2.1.1 (2019-03)
Tabl
...