IEC TS 60364-7-725-2026 低压电气装置 - 第7-725部分：特殊安装或场所的要求——弹性电源系统

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IEC TS 60364-7-725

Edition 1.0 2026-01

TECHNICAL

SPECIFICATION

Low-voltage electrical installations -

Part 7-725: Requirements for special installations or locations - Resilient power

supply system

IEC TS 60364-7-725:2026-01(en)

ICS 29.020

ISBN 978-2-8327-1021-0

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IEC TS 60364-7-725:2026 © IEC 2026

CONTENTS

FOREWORD .................................................................................................................. 3

INTRODUCTION ............................................................................................................ 5

725 Resilient power supply system .................................................................................. 6

725.1 Scope ...................................................................................................... 6

725.2 Normative references................................................................................. 6

725.3 Terms and definitions ................................................................................ 6

725.31 Purposes, supplies and structure ................................................................ 7

725.312 Conductor arrangement and system earthing ............................................... 7

725.313 Supplies ................................................................................................... 7

725.314 Division of installation ................................................................................ 7

725.36 Continuity of service .................................................................................. 7

725.5 Selection and erection of electrical equipment .............................................. 7

725.51 Common rules ........................................................................................... 7

725.512 Operational conditions and external influences ............................................. 7

725.52 Wiring systems.......................................................................................... 9

725.522 Selection and erection of wiring systems in relation to external

influences ................................................................................................. 9

725.55 Other equipment ....................................................................................... 9

725.6 Verification ............................................................................................. 10

Annex A (informative) Reference for non-specific disaster ............................................... 11

A.1 Examples of systems ..................................................................................... 11

A.2 Example of connected loads ........................................................................... 14

Annex B (informative) Reference for earthquake-specific disaster ..................................... 16

B.1 Calculation of seismic force of electrical equipment and method to support

and fix it ....................................................................................................... 16

B.2 Installation example of a wiring installation ....................................................... 20

Annex C (informative) Reference for flood damage-specific disaster ................................. 23

C.1 Power supplies and switchboards .................................................................... 23

C.2 Electrical equipment....................................................................................... 23

C.3 Wiring systems .............................................................................................. 23

Annex D (informative) List of notes concerning certain countries ...................................... 24

Bibliography ................................................................................................................. 25

Figure A.1– Example of a system that switches from TT to the TN system during

independent operation .................................................................................................. 12

Figure A.2 – Example of a system where supply diversity has been improved ..................... 13

Figure B.1 – Example of calculating anchor bolts loads .................................................... 19

Figure B.2 – Example of seismic support for horizontal piping, etc. .................................... 20

Figure B.3 – Example of installation of underground service cable to a building .................. 22

Figure B.4 – Example of wiring installation at an expansion joint ....................................... 22

Table A.1 – ‘Communication sheet’ to decide a specification of respective rooms in a

building in normal times and a performance in time of disaster .......................................... 15

Table B.1 – Standard seismic intensity for design (Ks) ..................................................... 16

Table B.2 – Correlation table of zone factor (Z) for peak ground acceleration (PGA) ............ 17

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标签： #电气 #安装

摘要：

本页解读 IEC TS 60364-7-725-2026《低压电气装置 - 第7-725部分：特殊安装或场所的要求——弹性电源系统》。该技术规范面向特殊安装或场所，规定弹性电源系统在低压电气装置中的设计、设备选择、安装、保护、接地、切换及运行维护等要求，旨在提升供电连续性、可靠性与电气安全，帮助工程设计、施工、监理、验收及运维人员理解和应用标准。通过 IEC TS 60364-7-725、弹性电源系统、低压电气装置等关键词，可获取该标准的技术要点、适用场景与合规参考。

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IEC TS 60364-7-725-2026 低压电气装置 - 第7-725部分：特殊安装或场所的要求——弹性电源系统

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