IEC 60364-8-1:2019

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

IEC 60364-8-1:2019

Name:IEC 60364-8-1:2019   Standard name:Low-voltage electrical installations - Part 8-1: Functional aspects - Energy efficiency
Standard number:IEC 60364-8-1:2019   language:English language
Release Date:05-Feb-2019   technical committee:TC 64 - Electrical installations and protection against electric shock
Drafting committee:MT 41 - TC 64/MT 41   ICS number:13.020.01 - Environment and environmental protection in general

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




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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 .
...

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