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GB/T 47348-2026Technical specification for the lightning protection of outdoor electronic display systems (English PDF)

室外电子展示系统防雷技术规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 31, 2026

Implementation date

October 1, 2026

Scope

GB/T 47348-2026 is the English-translated version of 室外电子展示系统防雷技术规范.

GB/T 47348-2026 is the Chinese standard "Technical specification for the lightning protection of outdoor electronic display systems".

Its scope clause reads: This document specifies the basic requirements, lightning protection levels, direct lightning strike protection measures, protection against contact voltage, and protection against step lightning strikes for outdoor electronic display systems.

Requirements for voltage protection measures, surge protection measures, and maintenance and management of lightning protection devices are described, along with corresponding testing methods.

This document applies to the lightning protection design, construction, and maintenance of newly built, renovated, or expanded outdoor electronic display systems.

This document does not apply to outdoor electronic display systems installed on mobile carriers. Its clauses include terms and definitions.

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Document preview — GB/T 47348-2026

National Standard of the People's Republic of China

ICS: 91.120.40
Classification: M 04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Basic Requirements
5.Lightning protection level
6.Direct lightning strike protection measures
7.Measures to prevent contact voltage and step voltage
8 Surge protection measures
9.Detection methods 8.
10.Maintenance and Management of Lightning Protection Devices
Appendix A (Informative) Schematic Diagram of Outdoor Electronic Display Screen
Appendix B (Informative) Classification of Outdoor Electronic Display Screen Installation Sites
Appendix C (Informative) Example 13 of Equipotential Bonding in Indoor Broadcast Control Equipment Room
Appendix D (Normative) Materials and Minimum Cross-sectional Area of Equipotential Bonding Conductors
Appendix F (Normative) Selection and Parameters of SPD for Signal Lines

1 Scope

This document specifies the basic requirements, lightning protection levels, direct lightning strike protection measures, protection against contact voltage, and protection against step lightning strikes for outdoor electronic display systems.

Requirements for voltage protection measures, surge protection measures, and maintenance and management of lightning protection devices are described, along with corresponding testing methods.

This document applies to the lightning protection design, construction, and maintenance of newly built, renovated, or expanded outdoor electronic display systems.

This document does not apply to outdoor electronic display systems installed on mobile carriers.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 18802.352 Low-voltage surge protection components - Part 352.Surge isolation transformers (SITs) for telecommunications and signaling networks

Selection and Use Guidelines

GB/T 21431 Technical Specification for Testing Lightning Protection Devices of Buildings

GB 50057-2010 Code for Design of Lightning Protection of Buildings

GB 50601 Code for Construction and Quality Acceptance of Lightning Protection Engineering for Buildings

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1

The system consists of an outdoor electronic display screen, indoor broadcast control facilities, a signal transmission system, and a low-voltage power distribution system.

Note 1.Outdoor electronic displays are divided into freestanding and attached types. See Appendix A for a schematic diagram. The corresponding outdoor electronic display systems are freestanding outdoor electronic displays...

Display system and attached outdoor electronic display system.

Note 2.Common outdoor electronic display systems include electronic information release systems for tourist attractions, electronic advertising systems for buildings, and variable message signs for highways.

Etc.

3.2

Electrical appliances used to limit transient overvoltages and discharge inrush currents.

Note 1.A surge protector contains at least one non-linear element.

Note 2.The SPD has appropriate connecting devices and is a complete assembly component.

[Source. GB/T 18802.11-2020, 3.1.1]

3.3 Class I test

The test was conducted with a peak value equal to 8/20 of the impulse discharge current Iimp and a peak voltage equal to 1.2/50 of the impulse voltage.

[Source. GB/T 18802.11-2020, 3.1.34.1] […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.

Referenced standards

Normative references

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