Low-voltage electrical installations - Part 8-1: Functional aspects - Energy efficiency

IEC 60364-8-1:2019(E) provides additional requirements, measures and recommendations for the design, erection and verification of all types of low-voltage electrical installation including local production and storage of energy for optimizing the overall efficient use of electricity. It introduces requirements and recommendations for the design of an electrical installation within the framework of an energy efficiency management approach in order to get the best permanent functionally equivalent service for the lowest electrical energy consumption and the most acceptable energy availability and economic balance. These requirements and recommendations apply, within the scope of the IEC 60364 series, for new installations and modification of existing installations. This standard is applicable to the electrical installation of a building or system and does not apply to products. The energy efficiency of these products and their operational requirements are covered by the relevant product standards. This standard does not specifically address building automation systems. This edition includes the following significant technical changes with respect to the previous edition: a) revision of Annex B; b) revision of 4.2: Energy efficiency assessment for electrical installations; c) update of 8.3: Input from loads, sensors and forecasts; d) introduction of new definitions. This group energy efficiency publication is primarily intended to be used as an energy efficiency standard for the low voltage electrical installations mentioned in Clause 1, but is also intended to be used by technical committees in the preparation of standards, in accordance with the principles laid down in IEC Guide 119 and IEC Guide 118. The contents of the corrigendum of May 2019 have been included in this copy.

Errichten von Niederspannungsanlagen - Teil 8-1: Funktionale Aspekte - Energieeffizienz

Installations électriques à basse tension - Partie 8-1: Fonctionnalité - Efficacité énergétique

IEC 60364-8-1:2019 fournit des exigences, des mesures et des recommandations supplémentaires pour la conception, la mise en œuvre, le fonctionnement et la vérification de tous types d'installations électriques à basse tension comportant la production locale et le stockage local de l'énergie pour optimiser l'utilisation efficace globale de l'électricité. Elle présente les exigences, les recommandations et les méthodes applicables à la conception et à l’évaluation de l’efficacité énergétique (EE) d'une installation électrique dans le cadre d'une approche de gestion de l’efficacité énergétique afin d'obtenir la fonctionnalité équivalente au meilleur service permanent pour la consommation d'énergie électrique la plus faible et la disponibilité de l'énergie et l'équilibre économique les plus acceptables. Ces exigences, recommandations et méthodes s'appliquent, dans les limites du domaine d'application de l'IEC 60364 (toutes les parties), aux installations neuves et à la modification des installations existantes. Le présent document est applicable à l'installation électrique d'un bâtiment ou d'un système et ne s'applique pas aux produits. L’efficacité énergétique des produits et leurs exigences opérationnelles sont couvertes par les normes de produits concernées. Lorsqu’une autre norme fournit des exigences spécifiques à un système particulier ou une application d’installation particulière (par exemple, les systèmes de fabrication couverts par l’ISO 20140 (toutes les parties)), ces exigences peuvent remplacer celles du présent document. Le présent document ne traite pas spécifiquement des systèmes d'automatisation de bâtiments. La présente publication groupée d’efficacité énergétique est principalement destinée à être utilisée comme une norme d’efficacité énergétique pour les installations électriques à basse tension citées à l’Article 1, mais elle est également destinée à être utilisée par les comités d’études lors de l’élaboration de normes, conformément aux principes fixés dans le Guide IEC 119 et le Guide IEC 118. Cette deuxième édition annule et remplace la première édition parue en 2014. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) révision de l’Annexe B; b) révision de 4.2: évaluation de l’efficacité énergétique pour les installations électriques; c) mise à jour de 8.3: Données d’entrée à partir des charges, des capteurs et des prévisions; d) introduction de nouvelles définitions. La présente version bilingue (2021-02) correspond à la version anglaise monolingue publiée en 2019-02. La version française de cette norme n'a pas été soumise au vote

Nizkonapetostne električne inštalacije - 8-1. del: Energijska učinkovitost

Ta del standarda IEC 60364 določa dodatne zahteve, ukrepe in priporočila za zasnovo, postavitev, upravljanje ter preverjanje vseh vrst nizkonapetostnih električnih inštalacij, vključno z lokalno proizvodnjo in shranjevanjem energije za optimizacijo celotne učinkovite uporabe električne energije.
Uvaja zahteve, priporočila in metode za zasnovo ter oceno energetske učinkovitosti (EE) električnih inštalacij v okviru pristopa upravljanja energijske učinkovitosti, ki bi lahko zagotovili najboljšo stalno funkcionalno enakovredno storitev za najnižjo porabo električne energije in najbolj sprejemljivo razpoložljivost energije ter gospodarsko ravnotežje.
Te zahteve, priporočila in metode se uporabljajo, v okviru skupine standarda IEC 60364 (vsi deli), za nove inštalacije ter spremembe obstoječih inštalacij.
Ta dokument se uporablja za električno inštalacijo zgradbe ali sistema in se ne uporablja za izdelke. Energijsko učinkovitost izdelkov in njihovih obratovalnih zahtev določajo ustrezni standardi za izdelke.
Kadar drug standard določa posebne zahteve za neko uporabo sistema ali inštalacije (npr. proizvodni sistem, ki ga zajema skupina standardov ISO 20140 (vsi deli)), lahko te zahteve nadomestijo ta dokument.
Ta dokument se ne navezuje neposredno na gradnjo sistemov za avtomatizacijo.
Ta publikacija skupinske energetske učinkovitosti se uporablja predvsem kot standard o energetski učinkovitosti za nizkonapetostne električne inštalacije, omenjene v točki 1, vendar je namenjena tudi tehničnim odborom pri pripravi standardov skladno z načeli vodil IEC 119 in IEC 118.

General Information

Status
Published
Publication Date
13-Jun-2019
Current Stage
6060 - Document made available
Due Date
14-Jun-2019
Completion Date
14-Jun-2019

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SLOVENSKI STANDARD
SIST HD 60364-8-1:2019
01-september-2019
Nadomešča:
SIST HD 60364-8-1:2015
Nizkonapetostne električne inštalacije - 8-1. del: Energijska učinkovitost
Low-voltage electrical installations - Part 8-1: Energy efficiency
Errichten von Niederspannungsanlagen - Teil 8-1: Energieeffizienz
Installations électriques basse tension - Partie 8-1: Efficacité énergétique
Ta slovenski standard je istoveten z: HD 60364-8-1:2019
ICS:
27.015 Energijska učinkovitost. Energy efficiency. Energy
Ohranjanje energije na conservation in general
splošno
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
SIST HD 60364-8-1:2019 en

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

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SIST HD 60364-8-1:2019
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SIST HD 60364-8-1:2019
HARMONIZATION DOCUMENT HD 60364-8-1
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
June 2019
ICS 13.020.01; 27.015; 91.140.50 Supersedes HD 60364-8-1:2015
English Version
Low-voltage electrical installations - Part 8-1: Functional aspects
- Energy efficiency
(IEC 60364-8-1:2019)

Installations électriques à basse tension - Partie 8-1: Errichten von Niederspannungsanlagen - Teil 8-1:

Fonctionnalité - Efficacité énergétique Funktionale Aspekte - Energieeffizienz
(IEC 60364-8-1:2019) (IEC 60364-8-1:2019)

This Harmonization Document was approved by CENELEC on 2019-03-13. CENELEC members are bound to comply with the

CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document at national level.

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

CENELEC Management Centre or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

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

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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. HD 60364-8-1:2019 E
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SIST HD 60364-8-1:2019
HD 60364-8-1:2019 (E)
European foreword

The text of document 64/2353/FDIS, future edition 2 of IEC 60364-8-1, prepared by IEC/TC 64

"Electrical installations and protection against electric shock" was submitted to the IEC-CENELEC

parallel vote and approved by CENELEC as HD 60364-8-1:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-12-14

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-06-14

document have to be withdrawn
This document supersedes HD 60364-8-1:2015.

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.

Endorsement notice

The text of the International Standard IEC 60364-8-1:2019 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60034-30-1 NOTE Harmonized as EN 60034-30-1
IEC 60364 (series) NOTE Harmonized as HD 60364 (series)
IEC 60364-5-52:2009 NOTE Harmonized as HD 60364-5-52:2011 (modified)
IEC 60364-5-55:2011 NOTE Harmonized as HD 60364-5-559:2012 (modified)

IEC 60364-5-55:2011/A1:2012 NOTE Harmonized as HD 60364-5-557:2013 (not modified)

IEC 60364-6 NOTE Harmonized as HD 60364-6
IEC 60947-6-1:2005 NOTE Harmonized as EN 60947-6-1:2005 (not modified)

IEC 60947-6-1:2005/A1:2013 NOTE Harmonized as EN 60947-6-1:2005/A1:2014 (not modified)

IEC 61800-9-1 NOTE Harmonized as EN 61800-9-1
IEC 61800-9-2 NOTE Harmonized as EN 61800-9-2
IEC 62052-11 NOTE Harmonized as EN 62052-11
IEC 62586-1 NOTE Harmonized as EN 62586-1
1 2
IEC 62962 NOTE Harmonized as EN 62962
IEC 62974-1 NOTE Harmonized as EN 62974-1
ISO 50001 NOTE Harmonized as EN ISO 50001
To be published. Stage at the time of publication: IEC PRVC 62962:2018.
To be published. Stage at the time of publication: prEN 62962:2017.
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SIST HD 60364-8-1:2019
HD 60364-8-1:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 61557-12 2007 Electrical safety in low voltage distribution EN 61557-12 2008

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)
IEC 61869-2 - Instrument transformers - Part 2: Additional EN 61869-2 -
requirements for current transformers
IEC 62053-21 - Electricity metering equipment (a.c.) - EN 62053-21 -
Particular requirements - Part 21: Static
meters for active energy (classes 1 and 2)
IEC 62053-22 - Electricity metering equipment (a.c.) - EN 62053-22 -
Particular Requirements - Part 22: Static
meters for active energy (classes 0,2 S
and 0,5 S)
IEC GUIDE 118 - Inclusion of energy efficiency aspects in - -
electrotechnical publications
IEC GUIDE 119 - Preparation of energy efficiency - -
publications and the use of basic energy
efficiency publications and group energy
efficiency publications
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SIST HD 60364-8-1:2019
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SIST HD 60364-8-1:2019
IEC 60364-8-1
Edition 2.0 2019-02
INTERNATIONAL
STANDARD
colour
inside
Low-voltage electrical installations –
Part 8-1: Functional aspects – Energy efficiency
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.020.01; 27.015; 91.140.50 ISBN 978-2-8322-6510-9

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
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SIST HD 60364-8-1:2019
– 2 – IEC 60364-8-1:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms, definitions and abbreviated terms ...................................................................... 10

3.1 General ................................................................................................................. 10

3.2 Electrical energy management .............................................................................. 11

3.3 Energy measurement ............................................................................................ 12

3.4 Sectors of activities ............................................................................................... 13

3.5 Abbreviated terms ................................................................................................. 13

4 General ......................................................................................................................... 14

4.1 Fundamental principles ......................................................................................... 14

4.1.1 Safety of the electrical installation ................................................................. 14

4.1.2 Availability of electrical energy and user decision .......................................... 14

4.1.3 Design principles ........................................................................................... 14

4.2 Energy efficiency assessment for electrical installations ....................................... 15

4.2.1 General ......................................................................................................... 15

4.2.2 Action plan following an assessment according to Annex B ........................... 15

5 Sectors of activities ....................................................................................................... 15

6 Design requirements and recommendations .................................................................. 15

6.1 General ................................................................................................................. 15

6.2 Determination of load energy profile...................................................................... 16

6.3 Determination of the transformer and switchboard location with the

barycentre method ................................................................................................ 16

6.4 HV/LV substation .................................................................................................. 16

6.4.1 General ......................................................................................................... 16

6.4.2 Optimum number and location of HV/LV substations ...................................... 16

6.4.3 Working point of the transformer .................................................................... 17

6.4.4 Efficiency of the transformer .......................................................................... 17

6.5 Efficiency of local production and local storage ..................................................... 17

6.6 Losses in the wiring .............................................................................................. 17

6.6.1 Voltage drop .................................................................................................. 17

6.6.2 Cross-sectional areas of conductors .............................................................. 17

6.6.3 Power factor correction .................................................................................. 18

6.6.4 Reduction of the effects of harmonic currents ................................................ 18

7 Determination of the zones, usages and meshes ........................................................... 18

7.1 Determining the zones .......................................................................................... 18

7.2 Determining the usages within the identified zones ............................................... 19

7.3 Demand response ................................................................................................. 19

7.4 Determining the meshes ....................................................................................... 19

7.4.1 General ......................................................................................................... 19

7.4.2 Meshes .......................................................................................................... 20

7.4.3 Criteria for considering meshes ..................................................................... 20

7.5 Driving parameters................................................................................................ 21

7.5.1 General ......................................................................................................... 21

7.5.2 Occupancy .................................................................................................... 22

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7.5.3 Operating time ............................................................................................... 22

7.5.4 Environmental conditions ............................................................................... 22

7.5.5 Cost of electricity ........................................................................................... 22

7.6 Impacts on the design of an electrical installation ................................................. 22

8 Energy efficiency and load management system ............................................................ 22

8.1 General ................................................................................................................. 22

8.2 User specification ................................................................................................. 23

8.2.1 General ......................................................................................................... 23

8.2.2 Requirements on the loads ............................................................................ 23

8.2.3 Requirements on the supplies ........................................................................ 23

8.3 Inputs from loads, sensors and forecasts .............................................................. 24

8.3.1 General ......................................................................................................... 24

8.3.2 Communication .............................................................................................. 28

8.3.3 Data logging .................................................................................................. 29

8.3.4 Loads ............................................................................................................ 29

8.3.5 Forecasts ...................................................................................................... 31

8.4 Inputs from the supplies: energy availability and pricing ........................................ 31

8.5 Monitoring the performance of the electrical installation ........................................ 31

8.6 Management of loads through meshes .................................................................. 31

8.6.1 General ......................................................................................................... 31

8.6.2 Electrical energy management system (EEMS) .............................................. 31

8.7 Multi-supply source management: grid, local electricity production and

storage ................................................................................................................. 32

9 Maintenance and enhancement of the performance of the installation ........................... 32

9.1 Methodology ......................................................................................................... 32

9.2 Installation life cycle methodology ......................................................................... 34

9.3 Energy efficiency life cycle .................................................................................... 34

9.3.1 General ......................................................................................................... 34

9.3.2 Performance maintenance programme ........................................................... 34

9.3.3 Verification .................................................................................................... 35

9.4 Data management ................................................................................................. 35

9.5 Maintenance ......................................................................................................... 35

10 Parameters for implementation of efficiency measures .................................................. 35

10.1 General ................................................................................................................. 35

10.2 Efficiency measures .............................................................................................. 35

10.2.1 Current-using-equipment ............................................................................... 35

10.2.2 Electrical installation ...................................................................................... 37

10.2.3 Implementation of management systems ....................................................... 38

10.2.4 Local power supply ........................................................................................ 40

11 Energy efficiency actions ............................................................................................... 41

Annex A (informative) Determination of transformer and switchboard location using the

barycentre method ................................................................................................................ 42

A.1 Barycentre method ................................................................................................ 42

A.2 Total load barycentre ............................................................................................ 45

A.2.1 General ......................................................................................................... 45

A.2.2 Sub-distribution board locations ..................................................................... 46

A.2.3 Iterative process ............................................................................................ 46

A.3 Method of average route length............................................................................. 46

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SIST HD 60364-8-1:2019
– 4 – IEC 60364-8-1:2019 © IEC 2019
Annex B (normative) Method to assess the energy efficiency of an electrical

installation ............................................................................................................................ 49

B.1 General ................................................................................................................. 49

B.2 Electrical installation efficiency classes ................................................................. 49

B.3 Determination of the electrical installation efficiency class .................................... 49

B.3.1 General ......................................................................................................... 49

B.3.2 Industrial, commercial buildings and infrastructures ....................................... 50

B.3.3 Residential .................................................................................................... 64

Annex C (informative) List of notes concerning certain countries ......................................... 70

Bibliography .......................................................................................................................... 71

Figure 1 – Energy efficiency and load management system overview ................................... 23

Figure 2 – Electrical distribution scheme ............................................................................... 26

Figure 3 – Example of measurement equipment selection in an installation .......................... 28

Figure 4 – Iterative process for electrical energy efficiency management .............................. 33

Figure A.1 – Example 1: floor plan of production plant with the planned loads and

calculated barycentre ............................................................................................................ 44

Figure A.2 – Example 2: barycentre calculated ..................................................................... 45

Figure A.3 – Example of location of the barycentre in an industrial building .......................... 46

Figure A.4 – Example of location of the barycentre using the average route length

method ................................................................................................................................. 48

Figure B.1 – Level of efficiency of the electrical installation efficiency classes ...................... 49

Table 1 – Measurement applications ..................................................................................... 25

Table 2 – Overview of the needs for power metering and monitoring ..................................... 26

Table 3 – Process for electrical energy efficiency management and responsibilities .............. 33

Table A.1 – Cable length for supply of DB ............................................................................. 47

Table B.1 – Electrical installation efficiency classes .............................................................. 50

Table B.2 – Energy efficiency measures ............................................................................... 51

Table B.3 – Determination of energy consumption: coverage ................................................ 52

Table B.4 – Main substation: consumption ............................................................................ 52

Table B.5 – Main substation: location.................................................................................... 53

Table B.6 – Voltage drop ...................................................................................................... 53

Table B.7 – Efficiency of transformer .................................................................................... 54

Table B.8 – Efficiency of fixed installed current using equipment .......................................... 55

Table B.9 – Zones ................................................................................................................ 55

Table B.10 – Usages ............................................................................................................ 56

Table B.11 – Demand response: coverage ............................................................................ 56

Table B.12 – Demand response: duration ............................................................................. 56

Table B.13 – Meshes ............................................................................................................ 57

Table B.14 – Measurement by usages .................................................................................. 58

Table B.15 – Occupancy coverage ........................................................................................ 58

Table B.16 – Occupancy measurement ................................................................................. 58

Table B.17 – Energy management system (EEMS) ............................................................... 59

Table B.18 – HVAC control ................................................................................................... 59

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IEC 60364-8-1:2019 © IEC 2019 – 5 –

Table B.19 – Lighting control ................................................................................................ 60

Table B.20 – Performance maintenance process .................................................................. 60

Table B.21 – Frequency of the performance verification process ........................................... 60

Table B.22 – Data management ............................................................................................ 61

Table B.23 – Working point of transformer ............................................................................ 61

Table B.24 – Presence of continuous monitoring for large energy using systems .................. 62

Table B.25 – Power factor ..................................................................................................... 62

Table B.26 – THD ............................................................................................................... 63

Table B.27 – THD ................................................................................................................ 63

Table B.28 – Renewable energy ........................................................................................... 64

Table B.29 – Electrical energy storage .................................................................................. 64

Table B.30 – Energy efficiency measures parameters ........................................................... 65

Table B.31 – Determination of energy consumption .............................................................. 65

Table B.32 – Zones ............................................................................................................... 66

Table B.33 – Demand response coverage ............................................................................. 66

Table B.34 – Meshes ............................................................................................................ 67

Table B.35 – HVAC control ................................................................................................... 67

Table B.36 – Lighting control ................................................................................................ 68

Table B.37 – Measurement by usage .................................................................................... 68

Table B.38 – Renewable energy ........................................................................................... 69

Table B.39 – Electrical energy storage .................................................................................. 69

Table C.1 – Notes concerning certain countries .................................................................... 70

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SIST HD 60364-8-1:2019
– 6 – IEC 60364-8-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –
Part 8-1: Functional aspects – Energy efficiency
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

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