IEC 60364-8-1:2019

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

IEC 60364-8-1:2019 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.

Installations électriques à basse tension - Partie 8-1: Aspects fonctionnels - 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

General Information

• Status: Published
• Publication Date: 05-Feb-2019
• ICS: 13.020.01 - Environment and environmental protection in general
• ICS: 27.015 - Energy efficiency. Energy conservation in general
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: MT 41 - TC 64/MT 41
• Current Stage: PPUB - Publication issued
• Start Date: 01-Mar-2019
• Completion Date: 06-Feb-2019

Relations

• Corrected By: IEC 60364-8-1:2019/COR1:2019 - Corrigendum 1 - Low-voltage electrical installations - Part 8-1: Functional aspects - Energy efficiency
• Effective Date: 05-Sep-2023
• Revises: IEC 60364-8-1:2014 - Low-voltage electrical installations - Part 8-1: Energy efficiency
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60364-8-1 ®
Edition 2.0 2019-02
INTERNATIONAL
STANDARD
colour
inside
Low-voltage electrical installations –
Part 8-1: Functional aspects – Energy efficiency
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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International Standards for all electrical, electronic and related technologies.

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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

– 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

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

– 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 .
...

IEC 60364-8-1 ®
Edition 2.0 2019-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage electrical installations –
Part 8-1: Functional aspects – Energy efficiency

Installations électriques à basse tension –
Partie 8-1: Aspects fonctionnels – Efficacité énergétique

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About the IEC
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International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
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IEC 60364-8-1 ®
Edition 2.0 2019-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage electrical installations –

Part 8-1: Functional aspects – Energy efficiency

Installations électriques à basse tension –

Partie 8-1: Aspects fonctionnels – Efficacité énergétique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.020.01; 27.015; 91.140.50 ISBN 978-2-8322-9410-9

– 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

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 .
...