GB/T 18802.12: Evolution and historical versions
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Low-voltage surge protective device (SPD) - Part 12: Surge protective devices connected to low-voltage power systems - Selection and application principles
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Low-voltage surge protective devices -- Part 12: Surge protective devices connected to low-voltage power distribution systems -- Selection and application principles
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Part 12 of the low-voltage distribution system surge protection device (SPD): the selection and use of guidelines
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PDF similar to GB/T 18802.12-2024
Basic data | Standard ID | GB/T 18802.12-2024 (GB/T18802.12-2024) | | Description (Translated English) | Low-voltage surge protective device (SPD) - Part 12: Surge protective devices connected to low-voltage power systems - Selection and application principles | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Word Count Estimation | 158,167 | | Date of Issue | 2024-05-28 | | Date of Implementation | 2024-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18802.12-2024: Low-voltage surge protective device (SPD) - Part 12: Surge protective devices connected to low-voltage power systems - Selection and application principles
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ICS 29.240.10
CCSK30
National Standards of People's Republic of China
Replaces GB/T 18802.12-2014
Low voltage surge protective devices (SPD) Part 12.Low voltage
Guidelines for selection and use of surge protectors for power supply systems
Released on May 28, 2024, implemented on September 1, 2024
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface VII
Introduction IX
1 Scope 1
2 Normative references 1
3 Terms, definitions and abbreviations 2
3.1 Terms and Definitions 2
3.2 List of abbreviations and acronyms in this document (see Table 1 and Table 2) 13
4 Protection needs15
5 Protected Systems and Devices 15
5.1 General Principles 15
5.2 Low voltage power supply system 15
5.3 Characteristics of protected equipment 18
6 Surge protector18
6.1 Basic functions of SPD 18
6.2 Supplementary requirements 18
6.3 SPD classification 19
6.4 SPD characteristics 20
6.5 Supplementary information on SPD characteristics 21
7 Application of SPD in low voltage power supply system 26
7.1 Overview 26
7.2 Determine the SPD installation location according to the test category 27
7.3 SPD protection mode and installation 27
7.4 Factors that need to be considered when affecting the protection effect of SPD 29
7.5 Selection of SPD characteristics 34
7.6 Characteristics of auxiliary devices 42
Appendix A (Informative) Structural changes of this document compared with IEC 61643-12.2020 44
Appendix B (Informative) Main technical differences between this document and IEC 61643-12.2020 and their causes 45
Appendix C (Normative) Typical data and explanation of test procedures for selecting SPD 46
Appendix D (Informative) Examples of the relationship between UC and the system nominal voltage and the relationship between the metal oxide varistor (MOV) UP and
Example of relationship between UC54
Appendix E (Informative) Environment - Surge voltage in low voltage system (LV) 56
Appendix F (Informative) Partial Lightning Current Calculation 61
Appendix G (informative) TOV of the low voltage system caused by a fault between the high voltage system and earth 63
Appendix H (Informative) Coordination Rules and Principles 77
Appendix I (Informative) Application Examples 87
Appendix J (Informative) Risk Assessment Methods and Application Examples 96
Appendix K (Informative) System Electrical Stress 103
Appendix L (Informative) Application of SPD 105
Appendix M (Informative) Immunity and Rated Impulse Voltage Withstand Capability 120
Appendix N (Informative) Coordination when the equipment has both signal ports and power ports 125
Appendix O (Informative) Short-circuit backup protection and surge withstand 130
Appendix P (Informative) Practical Method for Testing System Level Immunity Under Lightning Discharge Conditions 136
Appendix Q (Informative) Guidelines for testing SPDs containing multiple components 138
References 142
Figure 1 Example of a one-port SPD 5
Figure 2 Example of a two-port SPD 6
Figure 3 Response waveforms of one-port and two-port SPDs to composite wave impact 7
Figure 4 Component and assembly examples 20
Figure 5 Typical Ures-I curve of metal oxide varistor (MOV) 24
Figure 6 Typical curve of gap discharge 25
Figure 7 Flowchart of SPD application 27
Figure 8 Example of connection type 1 (CT1) 28
Figure 9 Example of connection type 2 (CT2) 28
Figure 10 Effect of SPD connection wire length 31
Figure 11 When the lead length exceeds 50cm, the installation scheme of partial connection row may be used 32
Figure 12 Example of when additional SPD is required when the length of the connecting lead is less than 50 cm 33
Figure 13 Flowchart for selecting SPD 34
Figure 14 UT and UTOV 36
Figure 15 Coordination of SPD and external disconnector to ensure power supply continuity 38
Figure 16 SPD and external disconnector coordination to ensure protection continuity 38
Figure 17 Selectivity of OCPD and SPD external disconnectors in short circuit conditions 39
Figure 18 Typical application circuit diagram of two-stage SPD 41
Figure C.1 Test setup for action load test 49
Figure C.2 Test sequence diagram for 15 impacts 49
Figure C.3 Test timing diagram for additional 5 shocks 50
Figure F.1 Simple calculation of the total lightning current entering the distribution system 61
Figure G.1 Typical schematic diagram of possible earth connections in distribution substations and low-voltage installations and the resulting overvoltages in the event of a fault 65
Figure G.2 Schematic diagram of combined grounding consisting of substation RE and LV midpoint grounding (neutral point grounding) RB in TT system 65
Figure G.3 TN system 69
Figure G.4 TT system 70
Figure G.5 IT system, example a 71
Figure G.6 IT system, example b (GB/T 16895.10-2021, Figure 44F) 72
Figure G.7 IT system, example c1 (Figure 44E of GB/T 16895.10-2021) 73
Figure H.1 Two metal oxide varistors with the same nominal discharge current 78
Figure H.2 Two metal oxide varistors with different nominal discharge currents 79
Figure H.3 Example of coordination between gap-based SPD and metal oxide varistor-based SPD 81
Figure H.4 LTE-Standard Impact Parameter Coordination Method 82
Figure H.5 Arrangement of SPD coordination test 85
Figure I.1 Home installation 88
Figure I.2 Industrial installation 90
Figure I.3 Industrial installation circuit 90
Figure I.4 Example of a lightning protection system 91
Figure I.5 Configuration of DFIG wind turbine generator set 92
Figure I.6 PWM voltage between generator and converter in rotor circuit 92
Figure I.7 Converter and generator locations 93
Figure I.8 The converter tested by the testing organization and its L-PE voltage waveform 94
Figure J.1 Example of parts of a power supply line 97
Figure J.2 Example of electric vehicle power supply equipment 98
Figure J.3 Example of a chemical plant facility 99
Figure L.1 Installation of SPD in TN system 106
Figure L.2 Installation of SPD in TT system (SPD installed on the load side of RCD) 107
Figure L.3 Installation of SPD in TT system (SPD installed on the power supply side of RCD) 108
Figure L.4 Installation of SPD in IT systems without neutral conductor 109
Figure L.5 Typical installation mode of SPD at the power supply entrance of the device in the TN-CS system 110
Figure L.6 General method of installing a port SPD 110
Figure L.7 Examples of acceptable and unacceptable installations of SPDs when considering EMC aspects111
Figure L.8 Physical and electrical equivalent diagram of SPD and protected equipment 112
Figure L.9 Possible oscillation between a metal oxide varistor (MOV) type SPD and the protected equipment 112
Figure L.10 Example of doubling the voltage 113
Figure L.11 Subdivision of protective zones within a building 113
Figure L.12 Coordination of two metal oxide varistors 115
Figure N.1 Example of a PC with a modem in a power and communication system 125
Figure N.2 Schematic diagram of the circuit used for the test 126
Figure N.3 Voltage recorded between PC/modem reference points when surge current is applied (voltage and current vs. time, μs) 127
Figure N.4 Typical TT system for simulation 127
Figure N.5 Voltage and current waveforms measured when a surge is applied to the building shown in Figure N.1 after a multi-purpose SPD is installed 129
Figure O.1 Schematic diagram of SPD disconnector and MOV coordination 134
Figure O.2 Example of time-operation characteristics of an SPD external disconnector 135
Figure P.1 Example of a circuit for a discharge current test under normal use conditions 137
Figure P.2 Example of test circuit for induced current caused by lightning current 137
Figure Q.1 Example of multiple series discharge gaps with resistive/capacitive trigger control 138
Figure Q.2 Two series discharge gaps with capacitive trigger control 139
Figure Q.3 Three-pole GDT with parallel MOV bypass/trigger control 139
Figure Q.4 Four-electrode discharge gap with GDT MOV trigger control 140
Figure Q.5 Discharge gap of parallel branch with GDT in series with MOV 140
Figure Q.6 Three-electrode discharge gap with trigger transformer 141
Table 1 List of symbols 13
Table 2 List of abbreviations 14
Table 3 Maximum TOV values given in GB/T 16895.10-2021 17
Table 4 Optimal values of Iimp 23
Table 5 Protection modes of various low voltage systems 29
Table 6 Minimum recommended values of UC for SPD in various power supply systems 35
Table A.1 Comparison of chapter and clause numbers between this document and IEC 61643-12.202044
Table B.1 Main technical differences between this document and IEC 61643-12.2020 and their causes 45
Table D.1 Relationship between UC and system nominal voltage 54
Table D.2 Relationship between UP/UC of metal oxide varistors 55
Table G.1 Permissible temporary power frequency overvoltage according to GB/T 16895.10-2021 64
Table G.2 Power frequency stress overvoltage and power frequency fault overvoltage in low voltage system during high voltage ground fault 67
Table G.3 TOV test values for low voltage power supply systems that comply with GB/T 16895 (all parts) 74
Table G.4 Reference test voltage values for systems conforming to GB/T 16895 (all parts) 75
Table H.1 Voltage and current normalization calculation method 83
Table H.2 CWG voltage and current normalization coefficients at 1V 83
Table H.3 Normalized conversion factors of voltage and current relative to CWG 83
Table H.4 Test procedure for coordination 86
Table I.1 Example of PWM voltage and du/dt peak value at two terminals 93
Table I.2 Examples of characteristics of alternator excitation circuits and associated SPDs 94
Table I.3 Comparison of wind power generation system and low voltage distribution system 95
Table J.1 Calculation of CRL 96
Table J.2 Simplified method 99
Table J.3 Table GB/T 21714.2 Method 100
Table L.1 Calculation of Lrmp value 117
Table L.2 Number of conductors in common low voltage power supply systems 118
Table M.1 Typical rated impulse withstand voltage (derived from GB/T 16935.1-2023) 120
Table M.2 Selection of immunity test level (depending on installation situation) 123
Table M.3 Immunity level for AC input 123
Table N.1 Simulation results 128
Table O.1 Example of ratio between single impact withstand test and complete preconditioning/action load test 131
Table O.2 Performance of external disconnector technology 132
Table O.3 SFD rated current-surge withstand capability example 133
Table O.4 SSD operating current example 133
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 12 of GB/T 18802.GB/T 18802 has been published in the following parts.
--- Low voltage surge protective devices (SPD) Part 11.Performance requirements and test methods for surge protective devices for low voltage power supply systems;
--- Low voltage surge protective devices (SPD) Part 12.Guidelines for the selection and use of surge protective devices for low voltage distribution systems;
--- Low voltage surge protective devices Part 21.Surge protective devices (SPD) for telecommunication and signalling networks Performance requirements and test methods;
--- Low voltage surge protective devices Part 22.Guidelines for the selection and use of surge protective devices for telecommunication and signalling networks;
--- Low voltage surge protective devices Part 31.Performance requirements and test methods for surge protective devices for photovoltaic systems;
--- Low voltage surge protective devices Part 32.Guidelines for the selection and use of surge protective devices for photovoltaic systems;
--- Low voltage surge protective device components Part 311.Performance requirements and test circuits for gas discharge tubes (GDT);
--- Low voltage surge protective device components Part 312.Guidelines for the selection and use of gas discharge tubes (GDTs);
--- Low voltage surge protective device components Part 321.Avalanche breakdown diode (ABD) specification;
--- Low voltage surge protective device components Part 331.Specification for Metal Oxide Varistors (MOV);
--- Low voltage surge protective device components Part 341.Surge suppression thyristor (TSS) specification;
--- Low voltage surge protective device components Part 351.Performance requirements and specifications for surge isolation transformers (SIT) for telecommunication and signalling networks
experiment method;
--- Low voltage surge protective device components Part 352.Selection and use of surge isolation transformers (SIT) for telecommunication and signalling networks
Guidelines.
This document replaces GB/T 18802.12-2014 "Low voltage surge protective devices (SPD) Part 12.Surge protection devices for low voltage power distribution systems"
Guidelines for the selection and use of protective devices.
Compared with GB/T 18802.12-2014, the main technical changes of this document are as follows.
--- Changed the scope (see Chapter 1, Chapter 1 of the.2014 edition);
--- Added terms and definitions "impact voltage rating", "overvoltage category", "effective voltage protection level", "short-circuit SPD", "state
"State indicator", "open circuit voltage", "short circuit current of composite wave generator", "(alarm) output terminal", "multi-mode SPD", "total discharge
Current”, “Reference test voltage”, “Rated switching surge current of short-circuit type SPD”, “Determine electrical clearance voltage”, “Varistor voltage”
(See 3.1.43, 3.1.44, 3.1.46, 3.1.47, 3.1.48, 3.1.49, 3.1.50, 3.1.51, 3.1.52, 3.1.53, 3.1.54, 3.1.55,
3.1.56, 3.1.57);
--- Changed the terms and definitions "voltage protection level", "compound wave", "SPD disconnector", "type test", "rated short-circuit current", "overcurrent...compound wave", "compound wave
Current protection" (see 3.1.4, 3.1.11, 3.1.15, 3.1.16, 3.1.20, 3.1.45,.2014 edition 3.1.4, 3.1.11, 3.1.16,
3.1.17, 3.1.24, 3.1.38);
--- Deleted the terms and definitions "thermal breakdown", "routine test", "acceptance test" and "insertion loss" (see 3.1.14,.2014 edition
3.1.18, 3.1.19, 3.1.22);
--- Added abbreviations and acronyms "short-circuit current ICW of composite wave generator", "rated short-circuit current ISCCR", "multi-mode SPD
Total discharge current ITotal”, “Rated switching surge current Itrans of short-circuit type SPD”, “TOV application time tT during test”
"Probability of equipment damage PSPD" "Effective voltage protection level Up/f" "Specific energy W/R" "Varisto voltage Vv" "Double-fed induction power generation
DFIG”, “DUT”, “Equipotential Bonding Strip EB”, “Insulated Gate Bipolar Transistor IGB T”, “Lightning Electromagnetic Impact
LEMP”, “Pulse Width Modulation PWM”, “Surge Protection Component SPC”, “SPD Special Protection Device SSD” (see 3.2);
--- Deleted the abbreviations and acronyms "impact current peak value Ipeak", "CWG short-circuit current Isc", "limit voltage Um", "high voltage A
(Medium voltage, < 50kV) HVA "Zinc Oxide ZnO" (see 3.2 of the.2014 edition);
--- Increased protection requirements (see Chapter 4);
--- Deleted the maximum value diagram of UTOV according to GB/T 16895.10-2010 (see Figure 4 of the.2014 edition);
---Changed the selection of SPD parameters, temporary overvoltage characteristics, Iimp preferred value table, ISCCR. rated short-circuit current, Ifi. rated disconnection
Continued flow (see 6.4.2, 6.5.1.2, Table 4, 6.5.5, 5.4.2, 5.5.1.2, Table 2, 5.5.5 of the.2014 edition);
--- Delete the relationship diagram between UP, U0, UC and UCS (see Figure 6 of the.2014 edition);
--- Changed the flow chart of SPD application and the flow chart of SPD selection (see Figure 7, Figure 13, Figure 9, Figure 14 of the.2014 edition);
--- Deleted the fault status (see 6.2.4.2 of the.2014 edition);
---Increased the influence of the internal induced voltage of the device, the voltage protection level, the coordination and separation of the SPD and the expected short-circuit current of the installation location
Device information (see 7.4.3, 7.4.5, 7.5.2.4, 7.6.1).
This document is modified to adopt IEC 61643-12.2020 "Low-voltage surge protective devices Part 12.Surge protective devices for low-voltage power supply systems"
Guidelines for selection and use.
Compared with IEC 61643-12.2020, this document has a structural adjustment. Appendix A lists the differences between this document and IEC 61643-12.
Comparison table of changes in chapter and article numbers in 2020.
This document has technical differences compared to IEC 61643-12.2020.Appendix B provides the corresponding technical differences and their reasons.
List.
The following editorial changes were made to this document.
--- Deleted E.7, E.8.2, E.8.3, Appendix L and Appendix Q which are not relevant to my country's use;
--- Added notes on grounding of buildings in I.2;
--- Figure I.3 and Figure L.11 have been revised;
--- In reference number F of Figures L.1 to L.4, SSD is added to the backup protector example.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee for Standardization of Lightning Arrester (SAC/TC81).
This document was drafted by. Shanghai University, Xi'an High Voltage Electric Appliance Research Institute Co., Ltd., Shanghai Electric Science Research Institute, Sichuan Zhongguang Defense
Lei Technology Co., Ltd., Shenzhen Putai Electric Co., Ltd., Shanghai Meteorological Disaster Prevention Technology Center, Schneider Wanco (Tianjin) Electric
Equipment Co., Ltd., Xiamen Celtech Electronics Co., Ltd., Beijing ABB Low Voltage Electrical Appliance Co., Ltd., Shenzhen Haipengxin Electronics Co., Ltd.
Shanghai Xidaer Electronics Co., Ltd., Shanghai University of Electric Power, Vertiv Technologies Co., Ltd., Shanghai Dianke Zhenhe Intelligent Technology Co., Ltd.,
Suzhou Leikaipu Protection Equipment Co., Ltd., China Southern Power Grid Co., Ltd. Ultra-high Voltage Transmission Company Electric Power Research Institute, Goldwind Science & Technology Co., Ltd.
Co., Ltd., Tianjin Zhongli Lightning Protection Technology Co., Ltd., Beijing Lightning Protection Device Test Center, Xi'an Shendian Electric Co., Ltd., Nanyang Jin
Niu Electric Co., Ltd. and Hainan Electric Power Industry Development Co., Ltd.
The main drafters of this document are. Zhou Qibin, Zhu Zewei, Huang Yong, Zhong Xiangmin, Lei Chengyong, Shi Bingyu, Huang Jingye, Sun Quan, Li Yuan, Lin Yi, Zhang Xianggui,
Xu He, Xue Yonggang, Bian Xiaoyan, Meng Qi, Li Zhengyuan, Tian Qi, Sun Yong, Li Rui, Zhang Xu, Zhang Lihua, Jia Dongxu, Wang Guoqun, Huang Jun.
The previous versions of this document and the documents it replaces are as follows.
---This document was first published in.2006 and revised for the first time in.2014;
---This is the second revision.
Introduction
0.1 Overview
GB/T 18802 aims to establish the performance requirements, test methods and selection of low-voltage surge protectors and low-voltage surge protector components.
Thirteen parts.
--- Low voltage surge protective devices (SPD) Part 11.Performance requirements and test methods for surge protective devices for low voltage power supply systems;
--- Low voltage surge protective devices (SPD) Part 12.Guidelines for the selection and use of surge protective devices for low voltage distribution systems;
--- Low voltage surge protective devices Part 21.Surge protective devices (SPD) for telecommunication and signalling networks Performance requirements and test methods;
--- Low voltage surge protective devices Part 22.Guidelines for the selection and use of surge protective devices for telecommunication and signalling networks;
--- Low voltage surge protective devices Part 31.Performance requirements and test methods for surge protective devices for photovoltaic systems;
--- Low voltage surge protective devices Part 32.Guidelines for the selection and use of surge protective devices for photovoltaic systems;
--- Low voltage surge protective device components Part 311.Performance requirements and test circuits for gas discharge tubes (GDT);
--- Low voltage surge protective device components Part 312.Guidelines for the selection and use of gas discharge tubes (GDTs);
--- Low voltage surge protective device components Part 321.Avalanche breakdown diode (ABD) specification;
--- Low voltage surge protective device components Part 331.Specification for Metal Oxide Varistors (MOV);
--- Low voltage surge protective device components Part 341.Surge suppression thyristor (TSS) specification;
--- Low voltage surge protective device components Part 351.Performance requirements and specifications for surge isolation transformers (SIT) for telecommunication and signalling networks
experiment method;
--- Low voltage surge protective device components Part 352.Selection and use of surge isolation transformers (SIT) for telecommunication and signalling networks
Guidelines.
Surge protective devices (SPDs) are used to protect power systems and equipment from various types of surges such as lightning surges and operating surges under specified conditions.
A protective device against damage from overvoltage and surge current.
Select an SPD based on environmental conditions and the acceptable failure rates of the equipment and the SPD.
This document provides users with information on the selection and use of SPDs.
This document refers to GB/T 21714.1~21714.4 and GB/T 16895 (all parts) and is provided for evaluating the use of low voltage systems.
Information on the necessity of SPDs. These standards provide information on the selection and coordination of SPDs, taking into account all environmental conditions in which they are used.
Such as. performance of the equipment and system being protected, insulation level, overvoltage, installation method, SPD installation location, SPD coordination, failure mode and
Consequences of equipment damage.
GB/T 21714.2 provides a general method for assessing surge and lightning risks. GB/T 16895.10-2021 provides a
A simplified approach to assessing risk in electrical installations.
GB/T 16935 (all parts) provides guidance on product insulation coordination. GB/T 16895 (all parts) provides safety
(fire, overcurrent and electric shock) and installation requirements.
GB/T 16895 (all parts) provides direct information to SPD installers. IEC TR62066 provides more information on surge protection.
Scientific background information.
0.2 Instructions for understanding the contents of this document
The following is the organization of the document and provides a summary of the material contained in each chapter and appendix. The main chapters provide a selection and
Basic information on SPD elements. Readers who need more detailed information on the information provided in Chapters 4 to 7 can refer to the corresponding
appendix.
Chapter 1 sets out the scope of this document.
Chapter 2 lists the normative references in this document where additional information can be found.
Chapter 3 provides definitions used to understand this document.
Chapter 4 is an introduction to risk analysis (considering when the use of an SPD is beneficial).
Chapter 5 introduces the system and equipment parameters related to SPD selection. It also introduces the electrical stresses caused by lightning and the
Electrical stress caused by temporary overvoltage and operational overvoltage generated by the power grid itself.
Chapter 6 lists the electrical parameters used in selecting SPD and their related instructions. The data involved in these parameters are in GB/T 18802.11-
Given in 2020.
Chapter 7 is the core of this document and describes the relationship between electrical stress from the grid (discussed in Chapter 5) and SPD characteristics (discussed in Chapter 6).
It describes how the installation mode of the SPD affects its protection performance and gives different steps for selecting an SPD, including
Coordination issues between multiple SPDs used in the device.
Appendix A gives the structural changes of this document compared with IEC 61643-12.2020.
Appendix B gives the main technical differences between this document and IEC 61643-12.2020 and their reasons.
Appendix C provides the query information and explains the test procedures adopted in GB/T 18802.11-2020.
Appendix D provides an example of the relationship between two important parameters UC and UP for metal oxide (MOV) type SPDs, and also lists
Example of the relationship between UC and grid nominal voltage.
Appendix E supplements the information on surge voltages in low-voltage systems given in Chapter 5.
Annex F describes the methods used to determine the direct lightning current distribution between different grounding systems.
Annex G describes temporary overvoltages caused by faults in high voltage systems.
Appendix H supplements the information in Chapter 7 regarding coordination principles when multiple SPDs are used in a system.
Appendix I provides additional examples of using this document.
Appendix J supplements Chapter 4 with specific examples of the application of risk analysis.
Appendix K supplements the information on system electrical stress in Chapter 5.
Appendix L supplements the information in Chapter 7 on the application of SPDs in various low-voltage systems.
Annex M discusses the difference between immunity levels and insulation withstand levels for electrical equipment.
Appendix N discusses the coordination issues when the equipment has both signal ports and power ports.
Appendix O provides additional information on the withstand capability of fuses under surge conditions.
Appendix P provides a practical approach to testing system-level immunity.
Annex Q provides guidance for testing SPDs containing multiple components.
Low voltage surge protective devices (SPD) Part 12.Low voltage
Guidelines for selection and use of surge protectors for power supply systems
1 Scope
This document specifies the selection, operation, installation location and coordination principles of SPDs.
This document applies to SPDs connected to circuits and equipment with a rated AC voltage not exceeding 1000V (rms), 50/60Hz.
Some SPDs contain at least one nonlinear element for limiting surge voltage and discharging surge current.
NOTE. This document only covers SPDs and not surge protective components (SPCs) integrated into equipment.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 4208 Degrees of protection provided by enclosures (IP code) (GB/T 4208-2017, IEC 60529.2013, IDT)
GB/T 7251 (all parts) Low voltage switchgear and control equipment
Note. GB/T 7251.1-2023 Low-voltage switchgear and controlgear Part 1.General (IEC 61439-1.2020, IDT)
GB/T 7251.2-2023 Low-voltage switchgear and controlgear Part 2.Power switchgear and controlgear
(IEC 61439-2.2020,IDT)
GB/T 7251.3-2017 Low-voltage switchgear and controlgear Part 3.Distribution boards operated by general personnel (DBO)
(IEC 61439-3.2012,IDT)
GB/T 7251.4-2023 Low-voltage switchgear and controlgear Part 4.Particular requirements for construction site complete sets (ACS)
(IEC 61439-4.2012,IDT)
GB/T 7251.5-2017 Low-voltage switchgear and controlgear Part 5.Public grid power distribution equipment (IEC 61439-5.
2014, IDT)
GB/T 7251.6-2015 Low-voltage switchgear and controlgear Part 6.Busbar trunk system (bus duct)
GB/T 7251.7-2015 Low-voltage switchgear and controlgear Part 7.Complete sets of equipment for specific applications - such as docks, camping sites,
Market square, electric vehicle charging station (IEC /T S61439-7.2014, IDT)
GB/T 7251.8-2020 Low-voltage switchgear and controlgear Part 8.General technical requirements for intelligent complete sets of equipment
GB/T 7251.10-2014 Low-voltage switchgear and controlgear Part 10.Guidelines for specifying complete sets of equipment
(IEC /T R61439-0.2013,IDT)
GB/T 10963.1 Electrical accessories - Circuit breakers for overcurrent protection for household and similar use - Part 1.Circuit breakers for alternating current
(GB/T 10963.1-2020,IEC 60898-1.2015,IDT)
GB/T 13539 (all parts) Low voltage fuses
Note. GB/T 13539.1-2015 Low-voltage fuses Part 1.Basic requirements (IEC 60269-1.2009, IDT)
GB/T 13539.2-2015 Low-voltage fuses Part 2.Supplementary requirements for fuses used by full-time personnel (mainly used in industry)
Examples of standardized fuse systems A to K (IEC 60269-2.2013, IDT)
GB/T 13539.3-2017 Low-voltage fuses Part 3.Supplementary requirements for fuses used by unskilled personnel (mainly for household and similar
Standardized fuse system examples A to F (IEC 60269-3.2013, IDT)
GB/T 13539.4-2016 Low-voltage fuses Part 4.Supplementary requirements for fuse-links for protection of semiconductor equipment (IEC 60269-4.2012,
IDT)
GB/T 13539.5-2020 Low-voltage fuses Part 5.Application guide for low-voltage fuses (IEC /T R60269-5.2014, IDT)
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