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GB/T 16895.22-2022: Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Devices for protection for safety, isolation, switching, control and monitoring
Status: Valid GB/T 16895.22: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 16895.22-2022 | English | 1479 |
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Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Devices for protection for safety, isolation, switching, control and monitoring
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GB/T 16895.22-2022
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| GB 16895.22-2004 | English | 599 |
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[GB/T 16895.22-2004] Electrical installations of buildings -- Part 5-53: Selection and erection of electrical equipment -- Isolation, switching and control -- Section 534: Devices for protection against over-voltage
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GB 16895.22-2004
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PDF similar to GB/T 16895.22-2022
Basic data | Standard ID | GB/T 16895.22-2022 (GB/T16895.22-2022) | | Description (Translated English) | Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Devices for protection for safety, isolation, switching, control and monitoring | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F12;P63 | | Classification of International Standard | 91.140.50; 29.130.01 | | Word Count Estimation | 73,782 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-07-01 | | Older Standard (superseded by this standard) | GB/T 16895.4-1997, GB/T 16895.22-2004 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 16895.22-2022: Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Devices for protection for safety, isolation, switching, control and monitoring
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 91.140.50;29.130.01
CCSP63;K31;K32
National Standards of People's Republic of China
Replacing GB/T 16895.4-1997, GB/T 16895.22-2004
Low-voltage electrical installations
Part 5-53.Selection and installation of electrical equipment
For safety protection, isolation, switching, control and monitoring
electrical appliance
control and monitoring
Released on 2022-12-30 and implemented on 2023-07-01
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface V
Introduction VII
530.1 Scope 1
530.2 Normative references 1
530.3 Terms and Definitions 6
530.4 General and General Requirements 9
530.5 Installation of equipment 9
531 Protective equipment against electric shock 9
531.1 General requirements 9
531.2 Electrical appliances for automatic disconnection from the supply of electricity 9
531.2.1 General requirements 9
531.2.2 Overcurrent protective devices 10
531.2.3 Residual current operated protective device (RCD) 11
531.3 Equipment protected by double insulation or reinforced insulation 14
531.4 Equipment for protection against electrical separation 15
531.5 Equipment for SELV and PELV extra-low voltage protection 15
531.5.1 Power supplies for SELV and PELV systems 15
531.5.2 Selection of plugs and socket-outlets 15
531.6 Appliances for providing additional protection 15
531.7 Monitor 16
532 Thermal protection appliances and precautions 16
532.1 General requirements 16
532.2 Locations with specific fire risks16
532.2.1 General requirements 16
532.2.2 Establishments with external influences classified as BD2, BD3 or BD416
532.2.3 Sites with external influences classified as BE2 16
532.3 Selection of Arc Fault Protective Devices (AFDD) 17
533 Overcurrent protection device 17
533.1 General requirements 17
533.1.1 General Rule 17
533.1.2 Applicable standard 17
533.1.3 Fuses 18
533.2 Selection of overload protective devices 18
533.2.1 General requirements 18
533.2.2 Harmonic currents 19
533.2.3 Unbalanced shunting between parallel conductors 19
533.3 Selection of short-circuit protective devices 19
533.3.1 Thermal stress 19
533.3.2 Breaking capacity 20
533.4 Installation location of overcurrent protective device 20
533.4.1 General requirements 20
533.4.2 Mounting location of overload protective devices 20
533.4.3 Installation location of short-circuit protective device 21
533.5 Coordination of overload and short-circuit protection functions 21
533.5.1 Protection provided by a single appliance 21
533.5.2 Protection provided by dissimilar appliances 21
534 Transient overvoltage protective device 21
534.1 General requirements 21
534.2 Blank 22
534.3 Blank 22
534.4 Selection and installation of SPDs 22
534.4.1 SPD installation location and test category 22
534.4.2 Transient overvoltage protection requirements 23
534.4.3 Connection type 23
534.4.4 Selection of SPDs 24
534.4.5 SPD overcurrent protection 28
534.4.6 Failsafe 30
534.4.7 SPDs installed in conjunction with RCDs 30
534.4.8 SPD connection 30
534.4.9 SPD effective protection distance 32
534.4.10 SPD connecting conductors 32
535 Coordination of protective electrical appliances 33
535.1 Selectivity among overcurrent protective devices 33
535.1.1 General requirements 33
535.1.2 Local selectivity 33
535.1.3 Sufficient selectivity 33
535.1.4 Fully selective 33
535.1.5 Enhanced selectivity 34
535.1.6 Coordination of RCD and OCPD 34
535.2 Selectivity between RCDs 34
535.3 Selectivity between RCD and OCPD 34
535.4 OCPD with short circuit protection 34
536 Isolation and switching 35
536.1 Isolation 35
536.1.1 General requirements 35
536.1.2 Isolating appliances 36
536.2 Disconnection during mechanical maintenance 36
536.2.1 General requirements 36
536.2.2 Breakers for mechanical maintenance 37
536.3 Emergency switch 37
536.3.1 General requirements 37
536.3.2 Appliances for emergency breaking 37
536.3.3 Emergency stop devices 38
536.4 Function switch (control) 38
536.4.1 General requirements 38
536.4.2 Function switching appliances 38
537 Monitoring 38
537.1 General requirements 38
537.1.1 Monitors 38
537.1.2 Selection of Insulation Monitors (IMDs) 38
537.1.3 Selection of residual current monitor (RCM) 38
537.2 IT system power supply continuity 38
537.3 IT public power distribution system 39
537.4 Off-line monitoring system for TN, TT and IT systems 39
Appendix A (informative) Installation position of overload protective device 40
A.1 General requirements 40
A.2 The starting point of the branch circuit does not need to install the overload protection device 40
Appendix B (informative) Installation position of short-circuit protective device 41
B.1 General requirements 41
B.2 Situations where short-circuit protective devices do not need to be installed at the starting point of the branch circuit 41
Appendix C (informative) Installation of SPD --- installation example according to system characteristics Figure 43
C.1 TT system - three-phase with neutral 43
C.2 TN-C and TN-S systems - three-phase power supply 47
C.3 TN-S system - three-phase with neutral line 51
C.4 IT systems - three-phase with or without neutral 53
Appendix D (informative) Installations powered by overhead lines 56
Appendix E (Normative) Electrical Reference Standards for Isolation and Switching 57
Appendix F (empty) 59
Appendix G (informative) Different types of residual current protective devices (RCD) 60
G.1 Description of the RCD type 60
G.2 Examples of the use of different types of RCDs 60
Reference 64
Figure 1 Installation examples of SPDs passing the tests of types Ⅰ, Ⅱ, and Ⅲ23
Figure 2 CT1 type connection (4 0 configuration) for a three-phase system with neutral wire 23
Figure 3 CT1 type connection for three-phase system (3 0 configuration) 24
Figure 4 CT2 type connection for three-phase system with neutral (eg 3 1 configuration) 24
Figure 5 Connection point 28 of the SPD assembly
Figure 6 An example of using a dedicated external overcurrent protection device for overcurrent protection in the SPD branch circuit 29
Figure 7 Protective device as part of the device and used to protect the SPD 29
Figure 8 Connection of SPD 31
Figure 9 Installation example for reducing the conductor length on the power supply side of the SPD 32
Figure 10 Selective example 33
Figure 11 Example of current and its selectivity relationship 34
Figure 12 Example of OCPD with short circuit protection 35
Figure A.1 Overload protection device P2 is not set at the starting point of branch B 40
Figure A.2 The overload protection device P2 is set at a place not exceeding 3m from the starting point of branch B 40
Figure B.1 Limited change in the position of branch short-circuit protective device (P2) 41
Figure B.2 The short-circuit protection device P2 is installed at a point on the power supply side of the starting point of the branch 41
Figure C.1 Example of SPD assembly with CT2 type connection installed on the RCD power supply side (upstream) in a TT system 43
Figure C.2 Example of SPD with CT2 type connection installed on the RCD power supply side (upstream) in a TT system 44
Figure C.3 Example of SPD assembly with CT2 type connection installed on the RCD load side (downstream) in a TT system 45
Figure C.4 Example of SPD with CT2 type connection installed on the RCD load side (downstream) in a TT system 46
Figure C.5 Example of SPD component installation in TN-C system 47
Figure C.6 Example of SPD installation for CT1 type connection in TN-C system 48
Figure C.7 Example of SPD installation when PEN is divided into PE and N at the inlet end of the device in TN-CS system 49
Figure C.8 Example of installation of different switchboard SPDs in TN-CS system 50
Figure C.9 Installation example of SPD components in TN-S system 51
Figure C.10 Example of SPD installation in TN-S system 52
Figure C.11 Example of installation of SPD components in IT systems with N conductors 53
Figure C.12 Example of SPD installation in IT systems without N conductors 54
Figure C.13 Example of SPD installation in IT systems with N conductors 55
Figure G.1 Possible ground fault currents in systems with semiconductors 61
Table 1 Equipment Rated Impulse Voltage 25
Table 2 Determining Uc 26 of SPD according to power supply system configuration
Table 3 Determine the nominal discharge current (In) according to the power supply system and connection type 26
Table 4 Selection of Impulse Discharge Current (Iimp) When Buildings Are Protected Against Direct Lightning 27
Table 5 SPD connection depending on power supply system30
Table D.1 Selection of Impulse Discharge Current (Iimp) 56
Table E.1 Isolation and switching devices 57
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.
GB/T 16895 "Low-voltage electrical installations" is divided into 5 parts, and each part is divided into several sub-parts.
--- Part 1.Basic principles, general characteristics assessment and definition;
--- Part 4.Safety protection;
--- Part 5.Selection and installation of electrical equipment;
--- Part 6.Inspection;
--- Part 7.Requirements for special installations or locations.
This document is part 5-53 of GB/T 16895 "Low Voltage Electrical Installations". Part 5 of GB/T 16895 has issued the following
subsection.
--- Building electrical installations Part 5-51.General rules for the selection and installation of electrical equipment;
--- Low-voltage electrical installations Part 5-52.Selection and installation of electrical equipment and wiring systems;
--- Low-voltage electrical installations Part 5-53.Selection and installation of electrical equipment for safety protection, isolation, switching, control and monitoring
electrical appliances tested;
--- Low-voltage electrical installations Part 5-54.Selection and installation of electrical equipment Grounding configuration and protective conductor;
--- Low-voltage electrical installations Part 5-55.Selection of electrical equipment and installation of other equipment;
--- Low-voltage electrical installations Part 5-56.Selection and installation of electrical equipment safety features.
This document replaces GB/T 16895.4-1997 "Electrical Installations of Buildings - Part 5.Selection and Installation of Electrical Equipment
Chapter 53.Switchgear and Controlgear" and GB/T 16895.22-2004 "Electrical installations of buildings - Part 5-53.Electrical equipment
Selection and Installation of Isolation, Switching and Control Equipment Section 534.Overvoltage Protective Appliances", and GB/T 16895.4-1997,
Compared with GB/T 16895.22-2004, the main technical changes are as follows.
--- Added all normative references, terms and definitions in Chapter 530 (see 530.2 and 530.3);
---Changed all clauses except chapters 531 and 534 (see 531 and 534 of the.2004 edition);
--- Increased section 537 monitoring (see Chapter 537).
This document is modified to adopt IEC 60364-5-53.2020 "Low-voltage electrical installations - Part 5-53.Use for the selection and installation of electrical equipment
Electrical appliances for safety protection, isolation, switching, control and monitoring".
The technical differences between this document and IEC 60364-5-53.2020 and their reasons are as follows.
--- Modify the requirements of 531.2.3.4.1, according to the application situation of the Chinese market, increase the RCD whose action function is related to the power supply voltage
applicability.
The following editorial changes were made to this document.
---Replace IEC 60947-2.2016, IEC 60947-
2.2019 includes the content of Amendment No. 1 of IEC 60947-2.2016, and the referenced content has no technical difference;
---In order to facilitate the use of the standard, the source reference information in the terminology part of 530.3 is replaced by GB/T 18802.11-2020
IEC 61643-11.2011, the quoted content has no technical difference;
---According to the provisions of GB/T 1.1, change the title of the clauses at the same level as 531.3.1 to a unified format, and delete the clauses of 531.3.1
title;
---Correct the clerical error in the document, change the last paragraph of 531.2.2.3b) to a column item;
---Delete Note 1 of 534.4.5.2;
---Because the number of clause 536.1 is missing, the number of 536.2 is changed to 536.1, and the number of subsequent clauses is adjusted accordingly;
---Appendix F of IEC 60364-5-53.2020 is the relevant requirements of other countries and has nothing to do with my country, so it is deleted in this document.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed and managed by the National Building Electrical Installation Standardization Technical Committee (SAC/TC205).
This document is drafted by. Siemens (China) Co., Ltd., China Petroleum Engineering & Construction Co., Ltd. Beijing Design Branch, Shanghai Electric
Scientific Research Institute, China Machinery and Electronics Design and Research Institute Co., Ltd., Beijing Xingdian International Engineering Management Co., Ltd., Fujian Agu Electric Data Technology Co., Ltd.
Co., Ltd., Shanghai Liangxin Electric Co., Ltd., Schneider Electric (China) Co., Ltd., MCC South City Construction Engineering Technology Co., Ltd.
company.
The main drafters of this document. Li Hui, Hu Hongyu, Huang Jingye, Ma Kun, Chen Tong, Hu Jianping, Liu Zhongmin, Zhang Tieming, Zhen Zhuo, Guo Changhua,
Wang Jingui, Tang Ying, Zhao Haoyi, Li Bai.
The release status of previous versions of this document and the documents it replaces are as follows.
---First published as GB/T 16895.4-1997 in.1997;
---First published as GB/T 16895.22-2004 in.2004;
--- This is the first revision.
Introduction
GB/T 16895 (all parts) Safety protection of low-voltage electrical installations, selection, installation and inspection of electrical equipment, and special equipment
The safety requirements of the location or place play a guiding role. GB/T 16895 is proposed to consist of six parts.
--- Part 1.Basic principles, general characteristics assessment and definition. The purpose is to ensure the design, installation and inspection of low-voltage electrical installations
Establish safety rules to avoid possible dangers and risks to persons, livestock and property caused by low-voltage electrical installations in reasonable use
damage, and ensure the normal operation of electrical installations.
--- Part 4.Safety protection. Contains 4-41, 4-42, 4-43, 4-44 sub-parts, the purpose is to establish the electric shock of low-voltage electrical installations
Basic requirements for protection, thermal effect protection, overcurrent protection, voltage disturbance and electromagnetic disturbance protection.
--- Part 5.Selection and installation of electrical equipment. Contains 5-51, 5-52, 5-53, 5-54, 5-55, 5-56 subsections, the purpose is to follow
According to the basic requirements for safety protection, establish the general requirements that meet the functional requirements for the intended use of electrical devices and the requirements for external influences.
rules, as well as establishing requirements for wiring systems, isolation, switching and control equipment, grounding arrangements and protective conductors, low-voltage generating equipment and auxiliary
Requirements for the selection and installation of electrical equipment in terms of auxiliary equipment, safety facilities, and power supply systems.
--- Part 6.Inspection. The purpose is to establish the requirements for preliminary inspection and periodic inspection of electrical installations.
--- Part 7.Requirements for special installations or locations. Including 7-701, 7-702, 7-703, 7-704, 7-705, 7-706, 7-710,
Standing, there is no relevant connection.
--- Part 8.Functional aspects. Contains 8-1 subpart, the purpose is to design, install and operate the energy efficiency of the electrical installation
The evaluation of (EE) presents requirements, recommendations and methods.
The above-mentioned Parts 1, 4, 5 and 6 are general requirements and regulations (general parts), and generally apply to
Used in Part 7 (undated reference), but in special installations and places, Part 7 proposes to supplement, modify or replace GB/T 16895
Some provisions and requirements of Part 1, Part 4, Part 5 and Part 6.
This document contains electrical appliances involved in safety protection, isolation, switching, control and monitoring in the selection and installation of electrical installations. Details column
Within the following terms.
530.4 General and General Requirements
530.5 Installation of equipment
531 Electric shock protective equipment
532 Thermal protection appliances and precautions
533 Overcurrent protection device
534 Transient overvoltage protective device
535 Coordination of protective appliances
536 Isolation and switching
537 monitoring
Low-voltage electrical installations
Part 5-53.Selection and installation of electrical equipment
For safety protection, isolation, switching, control and monitoring
electrical appliance
530.1 Scope
This document specifies requirements for the following matters.
a) isolation, switching, control, monitoring; and
b) Selection and installation of the following electrical appliances.
1) Isolation, switching, control, monitoring electrical appliances; and
2) Electrical appliances complying with safety protection measures.
530.2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 14048.2-2020 Low-voltage switchgear and controlgear Part 2.Circuit breakers (IEC 60947-2.2019, MOD)
Note. There is no technical difference between the referenced content of GB/T 14048.2-2020 and the referenced content of IEC 60947-2.2016.
GB/T 16895.2-2017 Low-voltage electrical installations Part 4-42.Safety protection Thermal effect protection (IEC 60364-4-42.
2010, IDT)
GB/T 16895.5-2012 Low-voltage electrical installations Part 4-43.Safety protection Overcurrent protection (IEC 60364-4-43.
2008, IDT)
GB/T 16895.21-2020 Low-voltage electrical installations Part 4-41.Safety protection Electric shock protection (IEC 60364-4-41.
2017, IDT)
GB/T 16935.1-2008 Insulation coordination of equipment in low-voltage systems - Part 1.Principles, requirements and tests (IEC 60664-1.
2007, IDT)
GB/T 16916 (all parts) Residual current operated circuit breakers (RCCB) without overcurrent protection for household and similar purposes
[IEC 61008 (all parts)]
Note. GB/T 16916.1-2014 Residual current operated circuit breakers (RCCB) without overcurrent protection for household and similar purposes - Part 1.General
Rules (IEC 61008-1.2012, MOD)
Note. GB/T 16916.21-2008 Residual current operated circuit breakers (RCCB) without overcurrent protection for household and similar purposes - Part 21.General
Applicability of the rules to RCCBs whose operating functions are independent of the supply voltage (IEC 61008-2-1.1990, IDT)
Note. GB/T 16916.22-2008 Residual current operated circuit breakers (RCCB) without overcurrent protection for household and similar purposes - Part 22.General
Applicability of the rules to RCCBs whose operating functions depend on the supply voltage (IEC 61008-2-2.1990, IDT)
GB/T 16917 (all parts) Residual current operated circuit breakers (RCBO) with overcurrent protection for household and similar purposes
[IEC 61009 (all parts)]
Note. GB/T 16917.1-2014 Residual current operated circuit breakers (RCBO) with overcurrent protection for household and similar purposes - Part 1.General specifications
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