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GB/T 16895.10-2021 English PDF

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US$834.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 16895.10-2021: Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances
Status: Valid

GB/T 16895.10: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16895.10-2021	834	Add to Cart	6 days	Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances	Valid
GB/T 16895.10-2010	RFQ	ASK	7 days	Low-voltage electrical installations -- Part 4-44: Protection for safety -- Protection against voltage disturbances and electromagnetic disturbances	Obsolete
GB/T 16895.10-2001	199	Add to Cart	3 days	Electrical installations of buildings -- Part 4: Protection for safety -- Chapter 45: Protection against undervoltage	Obsolete

Similar standards

GB 17625.1 GB/T 17618 GB/Z 17624.2 GB/T 16895.3 GB/T 16895.13 GB/T 16895.7

Basic data

Standard ID: GB/T 16895.10-2021 (GB/T16895.10-2021)
Description (Translated English): Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L06;L05;P63
Word Count Estimation: 46,453
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16895.10-2021: Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances

---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.
Low-voltage electrical installations - Part 4-44.Protection for safety - Protection against voltage disturbances and electromagnetic disturbances ICS 33.100.10;33.100.20;91.140.50 CCSL06;L05;P63 National Standards of People's Republic of China Replace GB/T 16895.10-2010 Low-voltage electrical installations Part 4-44.Safety protection Voltage disturbance and electromagnetic disturbance protection (IEC 60364-4-44.2018, IDT) Released on 2021-10-11 2022-05-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Preface Ⅴ Introduction Ⅶ 1 Scope 1 2 Normative references 1 441 (empty) 3 442 Protection against temporary overvoltages of low-voltage installations caused by high-voltage system ground faults and low-voltage system faults 3 442.1 Scope of application 3 442.1.1 General Rule 3 442.1.2 Symbol 3 442.2 Overvoltage of low-voltage system during high-voltage ground fault 4 442.2.1 Power frequency fault voltage amplitude and duration 5 44 2.2.2 Power frequency stress voltage amplitude and duration 6 44 2.2.3 Requirements for voltage limit calculation 6 442.3 Power frequency stress voltage when the neutral conductor of TN and TT system is interrupted 7 442.4 Power frequency stress voltage when a ground fault occurs in an IT system with a neutral conductor 7 442.5 Power frequency stress voltage when a short circuit occurs between a line conductor and a neutral conductor 7 443 Atmospheric transient overvoltage or operating overvoltage protection 7 443.1 General rules 7 443.2 (temporarily empty) 8 443.3 Terms and definitions 8 443.4 Overvoltage suppression 8 443.5 Risk Assessment Method 9 443.6 Classification of rated impulse voltage (overvoltage category) 10 443.6.1 Purpose of the classification of rated impulse voltage (overvoltage category) 10 443.6.2 Equipment rated impulse voltage and overvoltage category 10 444 Measures to prevent electromagnetic influence 11 444.1 General rules 11 444.2 (temporarily empty) 11 444.3 Definition 11 444.4 Reduce electromagnetic interference (EMI) 12 444.4.1 Sources of Electromagnetic Interference (EMI) 12 444.4.2.Measures to reduce electromagnetic interference (EMI) 13 444.4.3 TN system 14 444.4.4 TT system 17 444.4.5 IT system 18 444.4.6 Multiple power supply 19 444.4.7 Power Conversion 21 444.4.8 Various types of supply lines entering the building 22 444.4.9 Separate buildings 23 444.4.10 Inside the building 23 444.4.11 Protecting electrical appliances 24 444.4.12 Signal cable 25 444.5 Grounding and equipotential bonding 25 444.5.1 Interconnection of earth electrodes 25 444.5.2 Incoming network and grounding configuration are interconnected 25 444.5.3 Equipotential bonding conductors and grounding conductor networks of different construction types 25 444.5.4 Equipotential bonding network for multi-storey buildings 27 444.5.5 Functional ground conductor 28 444.5.6 Commercial or industrial buildings with large amounts of information technology equipment 28 444.5.7 Grounding and equipotential bonding of information technology equipment for functional purposes 28 444.6 Separation between circuits 29 444.6.1 General rules 29 444.6.2 Design requirements 29 444.6.3 No separation condition 30 444.7 Cable Management System 30 444.7.1 General rules 30 444.7.2 Design Guidelines 30 444.7.3 Installation guidelines 31 445 Undervoltage protection 32 445.1 Basic requirements 32 Appendix A (informative) Example of calculating the risk level (CRL) when using SPD 33 Appendix B (informative) Guidelines for the use of SPD overvoltage suppression on overhead lines 35 Reference 36 Figure 44.A1 Substation and low-voltage equipment may be connected to the ground and a typical schematic diagram of overvoltage in the event of a fault 4 Figure 44.Allowable fault voltage value when a ground fault occurs on the high-voltage side of the A2 substation 6 Figure 443.1 Illustration of electrical installation considering length 9 Figure 44.R1 reinforced shielding bypass conductor provides a common equipotential bonding system 13 Figure 44.Example of replacing or bypassing equipotential bonding conductor in R2 TT system 14 Figure 44.R3A uses the TN-S system to avoid connecting components from the public power supply point to the terminal circuit including the building Neutral conductor current in 15 Figure 44.The load side of the R3B user-used power supply transformer adopts the TN-S system to avoid the neutral conductor current in the connected components 16 Figure 44.TN-CS system in R4 building installation 17 Figure 44.TT system 18 in the R5 building installation Figure 44.IT system in R6 building installation 19 Figure 44.TN system multi-power supply with improper multi-point connection between R7A PEN conductor and ground 19 Figure 44.When the R7B multi-power TN system supplies power to an electrical device, its star points can only be grounded at the same point 20 Figure 44.When the R8 multi-power TT system supplies power to an electrical device, its star points can only be grounded at the same point 21 Figure 44.R9A three-phase conversion power supply with four-pole switch 21 Figure 44.R9B neutral current flows in a three-phase switching power supply with improper three-pole switching 22 Figure 44.R9C single-phase switching power supply 22 with two-pole switch Figure 44.R10 armored cables and metal pipes enter the building (example) 23 Figure 44.Examples of measures in R11 existing buildings 24 Figure 44.R12 grounding poles connected to each other 25 Figure 44.Example of R13 star network protective conductor 26 Figure 44.Example of R14 multi-mesh star network 26 Figure 44.Example of a meshed star network shared by R15 27 Figure 44.Example of the equipotential bonding network in a building where R16 is not equipped with a lightning protection system 27 Figure 44.Example of R17 cable separation pitch 30 Figure 44.Arrangement of cables in R18 metal cable tray 31 Figure 44.Conductivity continuity of R19 metal system components 31 Figure 44.Cable position in R20 metal part 31 Figure 44.R21 disconnected metal part connection 32 Table 44.A1 Power frequency stress voltage and power frequency fault voltage in low voltage system 5 Table 44.A2 Allowable power frequency stress voltage 6 Table 443.1 fenv calculation 9 Table 443.2 Rated impulse voltage value UW 11 required by equipment Table 444.1 Summary of the minimum separation distance when the regulations and/or intended use of information and communication technology cables are not specified 29

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 of Standardization Documents" Drafting. GB/T 16895 "Low-Voltage Electrical Installations" is divided into 5 parts, and each part is divided into multiple sub-parts. ---Part 1.Evaluation and definition of basic principles, general characteristics; ---Part 4.Security Protection; ---Part 5.Selection and installation of electrical equipment; ---Part 6.Inspection; ---Part 7.Requirements for special devices or places. This document is the 4-44 subpart of GB/T 16895 "Low-voltage electrical installations Part 4.Safety protection". Number 4 of GB/T 16895 The following parts have been released. --- Part 4-41 of low-voltage electrical installations. safety protection and electric shock protection (GB/T 16895.21); --- Part 4-42 of low-voltage electrical installations. safety protection thermal effect protection (GB/T 16895.2); --- Part 4-43 of low-voltage electrical installations. safety protection overcurrent protection (GB/T 16895.5); --- Part 4-44 of Low-Voltage Electrical Equipment. Safety Protection Voltage Disturbance and Electromagnetic Disturbance Protection (GB/T 16895.10). This document replaces GB/T 16895.10-2010 "Low-Voltage Electrical Installations Part 4-44.Safety Protection against Voltage Disturbance and Electromagnetic Disturbance Protection. Compared with GB/T 16895.10-2010, in addition to structural adjustments and editorial changes, the main technical changes of this document are as follows. --- The general rules for atmospheric transient overvoltage or operating overvoltage protection in part 443.1 have been changed (see 443.1, 443.1 in the.2010 edition); ---The lightning risk assessment method using the calculated risk length (CRL) instead of the original agreed length d (see 443.5,.2010 edition 443.3.2.2); ---Changed the separation between 444.6 circuits (see 444.6, 444.6 in the.2010 edition); ---The content of Appendix A has been changed, and SPD is used to calculate the risk level (CRL) example (see Appendix A,.2010 edition). Record A); --- Deleted Table B.1 in Appendix B (see Appendix B of the.2010 edition); --- Deleted Appendix C (see Appendix C of the.2010 edition). The translation method used in this document is equivalent to IEC 60364-4-44.2018 ``Low-voltage electrical installations Part 4-44.Safety protection voltage Harassment and electromagnetic harassment protection. The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows. ---GB/T 156-2017 standard voltage (IEC 60038.2009, MOD) ---GB/T 2900.57-2008 electrotechnical terminology power generation, transmission and distribution operation (IEC 60050-604.1987, MOD) ---GB 4943.1-2011 Information Technology Equipment Safety Part 1.General Requirements (IEC 60950-1.2005, MOD) ---GB/T 16895.1-2008 Low-voltage electrical installations Part 1.Basic principles, general characteristics assessment and definitions (IEC 60364-1.2005, IDT) ---GB/T 17799.1-2017 General Standard for Electromagnetic Compatibility Immunity in residential, commercial and light industrial environments (IEC 61000-6-1.2005, MOD) ---GB/T 17799.2-2003 Electromagnetic compatibility general standard industrial environment immunity test (IEC 61000-6-2. 1999, IDT) ---GB/T 17799.3-2012 EMC general standard for emissions in residential, commercial and light industrial environments (IEC 61000- 6-3.2011, IDT) ---GB 17799.4-2012 EMC general standard emission in industrial environment (IEC 61000-6-4.2011, IDT) ---GB/T 18802 (all parts) low voltage surge protector [IEC 61643 (all parts)] ---GB/T 19212.2-2012 Safety of power transformers, power supplies, reactors and similar products Part 2.General purpose Special requirements and tests for isolation transformers and power supplies with built-in isolation transformers (IEC 61558-2-1.2007, IDT) ---GB/T 19212.5-2011 transformers, reactors, power supply devices and similar products with a power supply voltage of 1100V and below Safety Part 5.Special requirements and tests for isolation transformers and power supply units with built-in isolation transformers (IEC 61558-2- 4.2009, IDT) ---GB/T 19212.7-2012 transformers, reactors, power supply devices and similar products with a power supply voltage of 1100V and below Safety Part 7.Special requirements and tests for safety isolating transformers and power supply devices with built-in safety isolating transformers (IEC 61558-2-6.2009, IDT) ---GB/T 19212.16-2017 Safety of transformers, reactors, power supply units and their combinations Part 16.Medical facilities Special requirements and tests for electrical isolation transformers (IEC 61558-2-15.2011, MOD) ---GB/T 21714.1-2015 Lightning Protection Part 1.General (IEC 62305-1.2010, IDT) ---GB/T 21714.3-2015 Lightning Protection Part 3.Physical damage and danger to life of buildings (IEC 62305-3. 2010, IDT) ---GB/T 21714.4-2015 Lightning Protection Part 4.Electrical and Electronic Systems in Buildings (IEC 62305-4.2010, IDT) ---GB/T 34961.2-2017 Realization and operation of cabling for information technology user building group Part 2.Planning and installation (ISO /IEC 14763-2.2012, IDT) This document has made the following editorial changes. --- The informative Appendix C "List of Notes by Countries" has been deleted. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Standardization Technical Committee for Building Electrical Installations (SAC/TC205). Drafting organizations of this document. China National Aviation Planning, Design and Research Institute Co., Ltd., CMC Design and Research Institute Co., Ltd., China Municipal Administration Engineering Northwest Design and Research Institute Co., Ltd., China Power Engineering Co., Ltd., Yuyao Jiarong Electronic Appliance Co., Ltd., Siemens (China) Co., Ltd., Schneider Electric (China) Co., Ltd. The main drafters of this document. Liu Pingzhou, Su Biping, Chen Tong, Yang Bin, Qian Zhongyang, Jiao Jianlei, Qian Jiacan, Hu Hongyu, Tang Ying, Du Kuiting, Qian Chubing. The previous versions of this document and the documents replaced are as follows. ---First published in.2001 as GB/T 16895.10-2001, first revised in.2010; ---This is the second revision.

Introduction

GB/T 16895 (all parts) on the safety protection of low-voltage electrical installations, the selection and installation and inspection of electrical equipment, as well as special installations The safety requirements of the home or site play a guiding role. The published standard of GB/T 16895 consists of 5 parts. ---Part 1.Basic principles, general characteristics assessment and definitions. The purpose is to confirm the design, installation and inspection of low-voltage electrical installations. Establish safety rules to avoid risks and dangers to personnel, livestock, and property that may occur to 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 devices 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 sub-parts, the purpose is to follow According to the basic requirements of safety protection, establish the functional requirements that meet the expected use of electrical devices and the general requirements for external influences. Rules, as well as the establishment of wiring systems, isolation, switching and control equipment, grounding arrangements and protective conductors, low-voltage power The requirements for the selection and installation of electrical equipment such as auxiliary equipment, safety facilities and their power supply systems. ---Part 6.Inspection. The purpose is to establish requirements for preliminary inspection and periodic inspection of electrical installations. ---Part 7.Requirements for special devices or places. Contains 7-701, 7-702, 7-703, 7-704, 7-705, 7-706, 7-710, Established, there is no relevant connection. The above Part 1, Part 4, Part 5, and Part 6 are general requirements and regulations (general parts), which are also applicable under normal circumstances. Used in Part 7 (cited without date), but in special installations and places, Part 7 proposes to supplement, modify or replace GB/T 16895 Some regulations and requirements of Part 1, Part 4, Part 5 and Part 6. This part of GB/T 16895 contains protection measures for electrical installations and voltage disturbances and electromagnetic disturbances. The detailed rules are listed in the following four clauses. 442 Protection against temporary overvoltages of low-voltage installations caused by high-voltage system ground faults and low-voltage system faults; 443 Atmospheric transient overvoltage or operation overvoltage protection; 444 Measures to prevent electromagnetic influence; 445 Undervoltage protection. Low-voltage electrical installations Part 4-44.Safety protection Voltage disturbance and electromagnetic disturbance protection

1 Scope

This document specifies the voltage disturbance and electromagnetic disturbance due to various reasons, and the requirements for the safety of electrical installations. This document does not apply to systems that generate, transmit and distribute electricity to the public grid (see the scope of IEC 60364-1), although this harassment can be carried out in electrical installations. Conduction through the power supply system inside or between electrical devices.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 13870.1-2008 Effect of electric current on humans and livestock Part 1.General part (IEC /T S60479-1.2005, IDT) GB/T 16895.3-2017 Low-voltage electrical installations Part 5-54.Selection and installation of electrical equipment, grounding configuration and protective conductor Body (IEC 60364-5-54.2011, IDT) GB/T 16895.21-2020 Low-voltage electrical installations Part 4-41.Safety protection and 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) ISO /IEC 11801-1 General Cabling for Information Technology User Buildings Part 1.General Requirements (Informationtech- nology-Genericcablingforcustomerpremises-Part 1.Generalrequirements) ISO /IEC 14763-2.2012/AMD1.20151) Realization and operation of cabling for information technology user buildings-Part 2.Regulation Planning and installation (Informationtechnology-Implementation and operationofcustomerpremisescabling-Part 2.Planningandinstalation) 1) ISO /IEC 14763-2.2012 has been replaced by ISO /IEC 14763-2.2019. 2) IEC 60050-604.1987 has been replaced by IEC 60050-614.2016. ISO /IEC TR29106 Information Technology General Cabling Introduction MICE Environmental Classification (Informationtechnology-Ge- nericcabling-IntroductiontotheMICEenvironmentalclassification) IEC 60038.2009 standard voltage (IEC standardvoltages) IEC 60050-604.19872) Electrotechnical terminology power generation, transmission and distribution operation (InternationalElectrotechnicalVo- cabulary-Chapter604.Generation,transmissionanddistributionofelectricity-Operation) IEC 60364-1 Low-voltage electrical installations Part 1.Basic principles, evaluation and definition of general characteristics (Low-voltage electrical instalations-Part 1.Fundamentalprinciples,assessmentofgeneralcharacteristics,definitions) IEC 60364-5-52 Low-voltage electrical installations Part 5-52.Selection and installation of electrical equipment wiring system (Low-voltage electricalinstalations-Part 5-52.Selectionanderectionofelectricalequipment-Wiringsystems) ......

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Question 1: How long will the true-PDF of GB/T 16895.10-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 16895.10-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 16895.10-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 16895.10-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 16895.10-2021?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 16895.10-2021 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.