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

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.

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)