Information technology - Data centre facilities and infrastructures - Part 2-2: Power supply and distribution

This European Standard addresses power supplies to, and power distribution within, data centres based upon the criteria and classifications for "availability", "physical security" and "energy efficiency enablement" within EN 50600 1.

Informationstechnik - Einrichtungen und Infrastrukturen von Rechenzentren - Teil 2-2: Stromversorgung und Stromverteilung

Technologie de l’information - Installation et infrastructures de centres de traitement de données - Partie 2-2: Alimentation en énergie et distribution de l’énergie

Informacijska tehnologija - Naprave in infrastruktura podatkovnega centra - 2-2. del: Napajanje in distribucija električne energije

Ta evropski standard obravnava napajanje in distribucijo električne energije v podatkovnih centrih na podlagi kriterijev ter klasifikacij za »dostopnost«, »fizično varnost« in »omogočanje energetske učinkovitosti« v okviru standarda EN 50600 1.

General Information

Status
Published
Publication Date
06-Jun-2019
Current Stage
6060 - Document made available
Due Date
07-Jun-2019
Completion Date
07-Jun-2019

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SLOVENSKI STANDARD
SIST EN 50600-2-2:2019
01-september-2019
Nadomešča:
SIST EN 50600-2-2:2014
Informacijska tehnologija - Naprave in infrastruktura podatkovnega centra - 2-2.
del: Napajanje in distribucija električne energije

Information technology - Data centre facilities and infrastructures - Part 2-2: Power

supply and distribution

Informationstechnik - Einrichtungen und Infrastrukturen von Rechenzentren - Teil 2-2:

Stromversorgung und Stromverteilung

Technologie de linformation - Installation et infrastructures de centres de traitement de

données - Partie 2-2: Alimentation en énergie et distribution de l’énergie
Ta slovenski standard je istoveten z: EN 50600-2-2:2019
ICS:
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
35.110 Omreževanje Networking
SIST EN 50600-2-2:2019 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50600-2-2:2019
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SIST EN 50600-2-2:2019
EUROPEAN STANDARD EN 50600-2-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 35.020; 35.110; 91.140.50 Supersedes EN 50600-2-2:2014
English Version
Information technology - Data centre facilities and infrastructures
- Part 2-2: Power supply and distribution

Technologie de l'information - Installation et infrastructures Informationstechnik - Einrichtungen und Infrastrukturen von

de centres de traitement de données Rechenzentren - Teil 2-2: Stromversorgung

This European Standard was approved by CENELEC on 2019-04-29. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50600-2-2:2019 E
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
Content

European foreword ...................................................................................................................................... 4

Introduction .................................................................................................................................................. 5

1 Scope .................................................................................................................................................. 8

2 Normative references........................................................................................................................ 8

3 Terms, definitions and abbreviations ............................................................................................. 9

3.1 Terms and definitions .......................................................................................................................... 9

3.2 Abbreviations ..................................................................................................................................... 13

3.3 Symbols ............................................................................................................................................. 13

4 Conformance ................................................................................................................................... 14

5 Power supply and distribution within data centres ..................................................................... 14

5.1 Functional elements ........................................................................................................................... 14

5.1.1 General ................................................................................................................... 14

5.1.2 Power supply to the data centre ............................................................................. 15

5.1.3 Power distribution within the data centre ................................................................ 16

5.2 Dimensioning of power distribution systems ..................................................................................... 18

6 Availability ....................................................................................................................................... 18

6.1 General requirements ........................................................................................................................ 18

6.2 Power supply ..................................................................................................................................... 18

6.2.1 Capacity planning ................................................................................................... 18

6.2.2 Availability of the utility supply ................................................................................ 20

6.2.3 Power quality .......................................................................................................... 21

6.2.4 Load presented to the utility supply ........................................................................ 22

6.2.5 Equipment ............................................................................................................... 22

6.2.6 Availability Class design options ............................................................................ 24

6.3 Power distribution .............................................................................................................................. 31

6.3.1 Capacity planning ................................................................................................... 31

6.3.2 Power quality .......................................................................................................... 32

6.3.3 Equipment ............................................................................................................... 32

6.3.4 Availability Class design options ............................................................................ 33

6.4 Incorporation of low voltage direct current distribution ...................................................................... 37

6.5 Additional considerations ................................................................................................................... 37

6.5.1 Residual current measurement .............................................................................. 37

6.5.2 Lightning and surge protection ............................................................................... 37

6.5.3 Segregation of power distribution cabling and information technology cabling ..... 37

6.6 Emergency Power Off ........................................................................................................................ 38

6.6.1 Requirements ......................................................................................................... 38

6.6.2 Recommendations .................................................................................................. 38

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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)

7 Physical security ............................................................................................................................. 38

7.1 General .............................................................................................................................................. 38

7.2 Access ............................................................................................................................................... 38

7.2.1 Power supply .......................................................................................................... 38

7.2.2 Power distribution ................................................................................................... 38

7.2.3 Attachment of unauthorised end-equipment .......................................................... 38

7.3 Internal environmental events............................................................................................................ 38

7.3.1 Power supply .......................................................................................................... 38

7.3.2 Power distribution ................................................................................................... 39

7.4 External environmental events .......................................................................................................... 39

8 Energy efficiency enablement and power distribution ............................................................... 39

8.1 General .............................................................................................................................................. 39

8.2 Granularity Level 1 ............................................................................................................................. 40

8.2.1 Requirements ......................................................................................................... 40

8.2.2 Recommendations .................................................................................................. 40

8.3 Granularity Level 2 ............................................................................................................................. 41

8.3.1 Requirements ......................................................................................................... 41

8.3.2 Recommendations .................................................................................................. 41

8.4 Granularity Level 3 ............................................................................................................................. 42

8.4.1 Requirements ......................................................................................................... 42

8.4.2 Recommendations .................................................................................................. 42

8.5 Cabling infrastructure to support energy efficiency enablement ....................................................... 42

Bibliography ............................................................................................................................................... 43

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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
European foreword

This document (EN 50600-2-2:2019) has been prepared by CLC/TC 215 “Electrotechnical aspects of

telecommunication equipment”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-04-29
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2022-04-29
conflicting with this document have to be
withdrawn
This document will supersede EN 50600-2-2:2014.
The following changes have been made:

a) title modified to emphasize distinction between power supply and power distribution requirements;

b) Clause 5 updated, in particular subclauses 5.1 regarding the power supply to the data centre and 5.2 on

the power distribution within the data centre;

c) availability requirements in Clause 6 revised and aligned with EN 50600-1:2018 and EN 50600-2-

3:2018;

d) physical security requirements revised, mainly regarding the power distribution in the data centre (see

7.3.2);
e) granularity level requirements amended (see 8.2 to 8.4);
f) Annex A removed;
g) minor technical and editorial improvements to the whole document.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission and

the European Free Trade Association.
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
Introduction

The unrestricted access to internet-based information demanded by the information society has led to an

exponential growth of both internet traffic and the volume of stored/retrieved data. Data centres are housing

and supporting the information technology and network telecommunications equipment for data processing,

data storage and data transport. They are required both by network operators (delivering those services to

customer premises) and by enterprises within those customer premises.

Data centres usually need to provide modular, scalable and flexible facilities and infrastructures to easily

accommodate the rapidly changing requirements of the market. In addition, energy consumption of data

centres has become critical both from an environmental point of view (reduction of environmental footprint)

and with respect to economical considerations (cost of energy) for the data centre operator.

The implementation of data centres varies in terms of:
a) purpose (enterprise, co-location, co-hosting or network operator facilities);
b) security level;
c) physical size;
d) accommodation (mobile, temporary and permanent constructions).

The needs of data centres also vary in terms of availability of service, the provision of security and the

objectives for energy efficiency. These needs and objectives influence the design of data centres in terms of

building construction, power distribution, environmental control, telecommunications cabling and physical

security as well as the operation of the data centre. Effective management and operational information is

required to monitor achievement of the defined needs and objectives.

Recognizing the substantial resource consumption, particularly of energy, of larger data centres, it is also

important to provide tools for the assessment of that consumption both in terms of overall value and of

source mix and to provide Key Performance Indicators (KPIs) to evaluate trends and drive performance

improvements.

At the time of publication of this European Standard, EN 50600 series is designed as a framework of

standards and technical reports covering the design, the operation and management as well as the key

performance indicators for energy efficient operation of the data centre.
The EN 50600-2 series defines the requirements for the data centre design.

The EN 50600-3 series defines the requirements for the operation and the management of the data centre.

The EN 50600-4 series defines the key performance indicators for the data centre.

The CLC/TR 50600-99-X Technical Reports cover recommended practices and guidance for specific topics

around data centre operation and design.

This series of European Standards specifies requirements and recommendations to support the various

parties involved in the design, planning, procurement, integration, installation, operation and maintenance of

facilities and infrastructures within data centres. These parties include:

1) owners, operators, facility managers, ICT managers, project managers, main contractors;

2) consulting engineers, architects, building designers and builders, system and installation designers,

auditors, test and commissioning agents;
3) facility and infrastructure integrators, suppliers of equipment;
4) installers, maintainers.

At the time of publication of this European Standard, EN 50600-2 series comprises the following standards:

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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)

EN 50600-2-1: Information technology — Data centre facilities and infrastructures — Part 2-1: Building

construction;

EN 50600-2-2: Information technology — Data centre facilities and infrastructures — Part 2-2: Power supply

and distribution;

EN 50600-2-3: Information technology — Data centre facilities and infrastructures — Part 2-3: Environmental

control;

EN 50600-2-4: Information technology — Data centre facilities and infrastructures — Part 2-4:

Telecommunications cabling infrastructure;

EN 50600-2-5: Information technology — Data centre facilities and infrastructures — Part 2-5: Security

systems.

The inter-relationship of the standards and technical reports within the EN 50600 series is shown in Figure 1.

Figure 1 — Schematic relationship between the EN 50600 standard

EN 50600-2-X standards specify requirements and recommendations for particular facilities and

infrastructures to support the relevant classification for “availability”, “physical security” and “energy efficiency

enablement” selected from EN 50600-1.

EN 50600-3-X documents specify requirements and recommendations for data centre operations, processes

and management.

EN 50600-4-X documents specify requirements and recommendations for key performance indicators (KPIs)

used to assess and improve the resource usage efficiency and effectiveness, respectively, of a data centre.

This European Standard addresses facilities and infrastructures for power supplies to, and power distribution

within, data centres together with the interfaces for monitoring the performance of those facilities and

infrastructures in line with EN 50600-3 series and EN 50600-4 series standards (in accordance with the

requirements of EN 50600-1). The line diagrams used in certain Figures are not intended to replace the

more familiar electrical circuit diagrams associated with power supply and distribution systems which are

included where relevant.
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)

This European Standard is intended for use by and collaboration between architects, building designers and

builders, system and installation designers.

This series of European Standards does not address the selection of information technology and network

telecommunications equipment, software and associated configuration issues.
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
1 Scope

This document addresses power supplies to, and power distribution within, data centres based upon the

criteria and classifications for “availability”, “physical security” and “energy efficiency enablement” within

EN 50600-1.
This document specifies requirements and recommendations for the following:
a) power supplies to data centres;
b) power distribution systems to all equipment within data centres;
c) telecommunications infrastructure bonding;
d) lightning protection;

e) devices for the measurement of the power consumption and power quality characteristics at points

along the power distribution system and their integration within management tools.

Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this European

Standard and are covered by other standards and regulations. However, information given in this European

Standard can be of assistance in meeting these standards and regulations.
Conformance of data centres to the present document is covered in Clause 4.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes

requirements of this document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 13160 (all parts), Leak detection systems

EN 50160:2010, Voltage characteristics of electricity supplied by public electricity networks

EN 50174-2, Information technology - Cabling installation - Part 2: Installation planning and practices inside

buildings

EN 50174-3, Information technology - Cabling installation - Part 3: Installation planning and practices outside

buildings
EN 50310, Telecommunications bonding networks for buildings and other structures

EN 50600-1, Information technology - Data centre facilities and infrastructures - Part 1: General concepts

EN 50600-2-3, Information technology - Data centre facilities and infrastructures - Part 2-3: Environmental

control

EN 50600-2-5, Information technology - Data centre facilities and infrastructures - Part 2-5: Security systems

EN 60076-11, Power transformers - Part 11: Dry-type transformers

EN 60947 (all parts), Low-voltage switchgear and controlgear (IEC 60947, all parts)

EN 61000-2-4:2002, Electromagnetic compatibility (EMC) - Part 2-4: Environment - Compatibility levels in

industrial plants for low-frequency conducted disturbances

EN 61439 (all parts), Low-voltage switchgear and controlgear assemblies (IEC 61439, all parts)

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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)

EN 61557-12:2008, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -

Equipment for testing, measuring or monitoring of protective measures - Part 12: Performance measuring

and monitoring devices (PMD)

EN 61869-2:2012, Instrument transformers - Part 2: Additional requirements for current transformers

EN 62040 (all parts), Uninterruptible power systems (UPS) (IEC 62040, all parts)

EN 62053-21:2003, Electricity metering equipment (a.c.) - Particular requirements - Part 21: Static meters for

active energy (classes 1 and 2)

EN 62053-22:2003, Electricity metering equipment (a.c.) - Particular requirements - Part 22: Static meters for

active energy (classes 0,2 S and 0,5 S)

EN 62271-200:2012, High-voltage switchgear and controlgear. Part 200. AC metal-enclosed switchgear and

controlgear for rated voltages above 1 kV and up to and including 52 kV
EN 62305 (all parts), Protection against lightning (IEC 62305, all parts)

EN 62305-4, Protection against lightning - Part 4: Electrical and electronic systems within structures

EN 62586-1:2017, Power quality measurement in power supply systems – Part 1: Power quality instruments

(PQI)

EN 62586-2:2017, Power quality measurement in power supply systems – Part 2: Functional tests and

uncertainty requirements

EN 62974-1, Monitoring and measuring systems used for data collection, gathering and analysis - Part 1:

Device requirements

EN 88528-11, Reciprocating internal combustion engine driven alternating current generating sets - Part 11:

Rotary uninterruptible power systems - Performance requirements and test methods
HD 60364 (all parts), Low-voltage electrical installations
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 50600-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
active power

under periodic conditions, mean value, taken over one period T, of the instantaneous power p

P= ∫ pdt

Note 1 to entry: Under sinusoidal conditions, the active power is the real part of the complex power S, thus P = Re S.

Note 2 to entry: The coherent SI unit for active power is watt, W.
[SOURCE: IEC 60050-131:2002, 131-11-42]
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
3.1.2
additional supply

power supply that provides power in the event of failure of primary and/or secondary supply

3.1.3
apparent power

product of the rms voltage U between the terminals of a two-terminal element or two-terminal circuit and the

rms electric current I in the element or circuit S = UI

Note 1 to entry: Under sinusoidal conditions, the apparent power is the modulus of the complex power S, thus S = |S| .

Note 2 to entry: The coherent SI unit for apparent power is voltampere, VA.
[SOURCE: IEC 60050-131:2002, 131-11-41]
3.1.4
capacitive load

load that is capacitive, so that the alternating current is out of phase with and leads the voltage

3.1.5
catenary
wire hung at a specific tension between supporting structures of power cabling
3.1.6
demarcation point

virtual interface between the power supply system and power distribution system infrastructures

3.1.7
diverse route

alternative, separate, pathway intended to provide adequate segregation from another pathway, in order to

provide resilient service provision in the event of physical damage to one of the pathways

3.1.8
dual-corded equipment
equipment served by multiple power supply input interfaces
3.1.9
emergency power off

designated device to provide emergency switching which disconnects power from one or more data centre

facilities, infrastructures or spaces

Note 1 to entry: The configuration and function of emergency power off devices can be subject to national or local

regulations.
3.1.10
fire compartment
discrete zone designed to contain a fire within that zone
3.1.11
high voltage
voltage whose nominal r.m.s. value is 36 kV < Un ≤ 150 kV

Note 1 to entry: Because of existing network structures, in some countries the boundary between MV and HV can be

different.
[SOURCE: EN 50160:2010, 3.7]
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
3.1.12
inductive load

load that is inductive, so that the alternating current is out of phase with and lags behind the voltage

3.1.13
information technology equipment

equipment providing data storage, processing and transport services together with equipment dedicated to

providing direct connection to core and/or access networks
3.1.14
IT load

electrical consumption of all the information technology equipment measured at its input terminals including

all on-board integrated power supplies and cooling fans
3.1.15
load factor

ratio, expressed as a numerical value or as a percentage, of the consumption within a specified period (year,

month, day, etc.), to the consumption that would result from continuous use of the maximum or other

specified demand occurring within the same period

Note 1 to entry: This term should not be used without specifying the demand and the period to which it relates.

Note 2 to entry: The load factor for a given demand is also equal to the ratio of the utilization time to the time in hours

within the same period.
[SOURCE: IEC 60050-691:1973, 691-10-02]
3.1.16
locally protected supply provision

sockets which continue to deliver power to connected equipment for a defined period following failure of

power supply and distribution equipment by means of a battery supply or UPS adjacent to, or co-located

with, those sockets (e.g. emergency lighting)
3.1.17
low voltage
voltage whose nominal r.m.s. value is Un ≤ 1 kV
[SOURCE: EN 50160:2010, 3.9]
3.1.18
Main-Tie-Tie-Main

electrical connection between two power supply or power distribution circuits which allows current to flow in

either direction and containing two circuit breakers enabling maintenance while one of the circuits is active

3.1.19
medium voltage
voltage whose nominal r.m.s. value is 1 kV < Un ≤ 36 kV

Note 1 to entry: Because of existing network structures, in some countries the boundary between MV and HV can be

different.
[SOURCE: EN 50160:2010, 3.11]
3.1.20
pathway
defined route for cables between termination points
[SOURCE: EN 50174-1:2018, 3.1.31]
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SIST EN 50600-2-2:2019
EN 50600-2-2:2019 (E)
3.1.21
power factor

under periodic conditions, ratio of the absolute value of the active power P to the apparent power S: λ = |P|/S

Note 1 to entry: The ratio of the active (real) power flowing to the load to the apparent power (as a result of the capacitive

or inductive nature of the load) and is a dimensionless number between 0 and 1.
[SOURCE: IEC 60050-131:2002, 131-11-46, modified: Note 1 to entry reworded]
3.1.22
protected supply provision
no break protected supply provision

sockets which continue to deliver power to connected equipment for a defined period following failure of

power supply and distribution equipment
3.1.23
primary distribution equipment

equipment which is required to manage, control and convert incoming power supplies (primary, secondary

and, where appropriate, additional) in a form suitable for distribution by secondary distribution equipment

3.1.24
primary supply

principal power supply that provides power to the data centre under normal operating conditions

3.1.25
resistive load
load in which the alternating current is in phase with the voltage
Note 1
...

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