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GB/T 21711.1-2023 English PDF

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US$1704.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21711.1-2023: Electromechanical elementary relays - Part 1: General and safety requirements
Status: Valid

GB/T 21711.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21711.1-2023	1704	Add to Cart	8 days	Electromechanical elementary relays - Part 1: General and safety requirements	Valid
GB/T 21711.1-2008	150	Add to Cart	Auto, < 3 mins	Electromechanical elementary relays -- Part 1: General and safety requirements	Obsolete

Similar standards

GB/T 17737.104 GB/T 17738.2 GB/T 21711.10 GB/T 21711.3 GB/T 21711.2

Basic data

Standard ID: GB/T 21711.1-2023 (GB/T21711.1-2023)
Description (Translated English): Electromechanical elementary relays - Part 1: General and safety requirements
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L25
Classification of International Standard: 29.120.70, 31.220.99
Word Count Estimation: 94,981
Date of Issue: 2023-03-17
Date of Implementation: 2023-10-01
Older Standard (superseded by this standard): GB/T 21711.1-2008
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 21711.1-2023: Electromechanical elementary relays - Part 1: General and safety requirements

---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.
ICS29:120:70;31:220:99 CCSL25 National Standards of People's Republic of China GB/T 21711:1-2023/IEC 61810-1:2015 Replace GB/T 21711:1-2008 Basic Electromechanical Relays Part 1: General principles and safety requirements (IEC 61810-1:2015, IDT) Released on 2023-03-17 2023-10-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface VII Introduction IX 1 Scope 1 2 Normative references 1 3 Terms and Definitions 3 3:1 General terms and definitions 3 3:2 Terms and definitions of relay types 4 3:3 Terms and definitions related to status and work5 3:4 Terms and definitions of working values 7 3:5 Terms and definitions related to contacts 7 3:6 Terms and Definitions Related to Annexes 10 3:7 Terms and definitions related to insulation 10 4 Amount of influence 12 5 rating 12 5:1 General 12 5:2 Coil rated voltage/coil rated voltage range 12 5:3 Operating value range 13 5:4 Release 13 5:5 Reversion 13 5:6 Electrical durability 13 5:7 Working rate 13 5:8 Contact load 13 5:9 Ambient temperature 14 5:10 Environmental Protection Category 14 5:11 Duty Cycle 14 6 Test general rules 14 7 Documentation and marking 16 7:1 Information 16 7:2 Additional information 17 7:3 Sign 17 7:4 Symbol 18 8 temperature rise 18 8:1 Requirement 18 8:2 Test device 19 8:3 Test procedure 20 8:4 Terminal 20 9 Basic working functions 22 9:1 General test conditions 22 9:2 Action (mono-stable relay) 22 9:3 Action/Reset (Bistable Relay) 24 10 dielectric withstand voltage 24 10:1 Preprocessing 24 10:2 Dielectric withstand voltage test 24 10:3 Special case of test procedure B 26 11 Electrical Durability 27 11:1 General 27 11:2 Overload and Endurance Test 28 11:3 Failure and failure criteria 28 11:4 Final dielectric withstand voltage test 28 12 Mechanical Durability 30 13 Clearances, creepage distances and solid insulation 31 13:1 General 31 13:2 Clearances and creepage distances 31 13:3 Solid insulation 35 13:4 Accessible surfaces 36 13:5 Solid Insulation of Coil Assemblies of Insulation Coordination Parts 36 14 Terminal 36 14:1 General 36 14:2 Threaded and unthreaded terminals 36 14:3 Flat quick-connect terminal 36 14:4 Welded terminals 36 14:5 Socket 37 14:6 Alternative terminal types 37 15 seal 37 16 Heat and fire resistance 38 Appendix A (Informative) Related Explanations of Relays 39 Appendix B (informative) contact inductive load 42 Appendix C (Normative) Test Device 45 C:1 Test circuit 45 C:2 Description and requirements 47 C:3 Test circuit diagram 47 C:4 Contact Load Category (CC) 47 C:5 Special loads 48 Appendix D (informative) special load 49 D:1 Special equipment application test and test sequence 49 D:2 Specific loads for telecommunication and signaling relays 55 D:3 Inrush current dedicated load 55 Appendix E (Normative) Temperature rise test configuration 58 Appendix F (Normative) Measurement of Clearance and Creepage Distance 59 Appendix G (Normative) Relationship between rated impulse voltage, rated voltage and overvoltage category 64 Appendix H (Normative) Pollution Degree 65 Appendix I (Normative) Tracking Resistance Test 66 Appendix J (Informative) Diagram of terminal series 67 Appendix K (Normative) Glow Wire Test 68 Appendix L (Normative) Ball Pressure Test 69 Appendix M (Informative) Needle Flame Test 70 Appendix N (informative) Standard welding process tolerance 71 N:1 General 71 N:2 Dual wave soldering process 71 N:3 Surface mount (SMT) process and through-hole reflow (THR) process 72 N:4 Assessment 72 Appendix O (Normative) Risk Assessment 73 O:1 General 73 O:2 Risk assessment procedure 73 O:3 Reduction to tolerable risk 73 O:4 Application of risk assessment procedures (advice to users) 75 Glossary 77 Reference 81 Figure A:1 Explanation of terminology of monostable relay Figure 39 Figure A:2 Example of Explanation of Terms Related to Contacts 40 Figure A:3 Relevant instructions for the range of coil voltage operating values 40 Figure A:4 5:3:1 (Level 1) and 9:2 Relevant instructions for operating voltage pretreatment and testing 41 Figure A:5 Relevant instructions for operating voltage preprocessing and testing specified in 5:3:2 and 9:2 41 Figure C:1 Standard test circuit 45 Figure C:2 Functional block diagram 46 Figure C:3 Contact load category 48 Figure D:1 Typical test circuit Figure 54 Figure D:2 Waveform of integrated measurement of pulse width and peak current 54 Figure D:3 Cable load test circuit 55 Figure D:4 Surge current load (such as capacitive load and simulated tungsten lamp load) test circuit---AC circuit 56 Figure D:5 Tungsten lamp test example of 10A/100A/250V~/2:5ms relay with rated value 56 Figure D:6 Surge current load (such as capacitive load and simulated lamp load) test circuit --- DC circuit 57 Figure D:7 Test circuit for surge current loads with power factor compensation (such as simulated fluorescent lamp loads) 57 Figure E:1 Test configuration 58 Figure F:1 Example 1 59 Figure F:2 Example 2 59 Figure F:3 Example 3 60 Figure F:4 Example 4 60 Figure F:5 Examples 5a and 5b 60 Figure F:6 Examples 6a and 6b 61 Figure F:7 Examples 7a and 7b 61 Figure F:8 Examples 8a and 8b 62 Figure F:9 Example 9 62 Figure F:10 Example 10 63 Figure F:11 Example 11 63 Figure J:1 Diagram of terminal series 67 Figure L:1 Ball pressure test device 69 Figure N:1 Double wave soldering temperature-time curve 71 Figure N:2 Surface mount process (SMT) and through-hole reflow soldering process temperature-time curve 72 Figure O:1 Interaction process of risk assessment and risk reduction 73 Figure O:2 Risk Reduction 74 Table 1 Baseline value of influence quantity12 Table 2 Protection category 14 Table 3 Type inspection (type test) 15 Table 4 Process Inspection 15 Table 5 Number of samples tested16 Table 6 Required Relay Information 16 Table 7 Symbol 18 Table 8 Rating value marking example 18 Table 9 Temperature class 19 Table 10 The cross-sectional area and length of the wire determined by the current carried by the terminal 21 Table 11 Action and release at constant coil voltage 23 Table 12 Actions using PWM and/or other action methods 24 Table 13 dielectric withstand voltage --- AC 25 Table 14 dielectric withstand voltage --- DC 26 Table 15 Electrical durability test procedure 27 Table 16 Contact Load Test Circuit Diagram 28 Table 17 Size selection rules for clearances and creepage distances 32 Table 18 Minimum electrical clearances for insulation fits in air 33 Table 19 Material Group 33 Table 20 Minimum creepage distances for equipment subject to long-term stress34 Table 21 Rated insulation voltage according to power system voltage 35 Table 22 Test conditions for test Tb 37 Table B:1 Verification of closing and breaking capabilities (abnormal conditions) 42 Table B:2 Verification of Closing and Breaking Capabilities (Normal Conditions) 43 Table B:3 Electrical durability test 43 Table B:4 Contact rating code and corresponding use category 44 Table C:1 Characteristics of contact load power supply 46 Table C:2 Characteristics of standard contact loads 46 Table D:1 Standard values for overload test 49 Table D:2 Durability test standard value 50 Table D:3 Rated power in horsepower, equipment full load current (AC) 51 Table D:4 Equipment current (DC) with rated power in horsepower 51 Table D:5 Overload and endurance test voltage 52 Table D:6 Large-capacity energy storage capacitor capacity 53 Table D:7 Peak current requirements 53 Table G:1 In the case of overvoltage protection provided by the surge arrester specified in IEC 60099-1, the rated voltage of the power supply system and the rated voltage of the equipment Correspondence between impulse voltages 64 Table O:1 Example of relationship between failure modes, effects and hazards 75 Table O:2 Severity of damage 75 Table O:3 Possibility of damage 76 Table O:4 Risk categories 76

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 1 of GB/T 21711 "Basic Electromechanical Relays": GB/T 21711 has issued the following parts: --- Part 1: General principles and safety requirements; --- Part 7: Test and measurement procedures: This document replaces GB/T 21711:1-2008 "Basic Electromechanical Relays Part 1: General Rules and Safety Requirements", and Compared with GB/T 21711:1-2008, except for structural adjustment and editorial changes, the main technical changes are as follows: --- Increase the coil excitation requirements in the case of using the method of reducing the coil power to make the relay operate (see 5:3:3); --- Increased the priority test items of process inspection items (see Table 4); --- Increased the test under a single installation condition (see Table 5, Table 6, 8:2, Table 11, Table 12, Table 15); --- Added the requirements for the number of test samples for each inspection batch for type inspection (see Chapter 6 and Table 5); ---In the required relay information, the coil rated power item is deleted, and the deviation between insulation data and standard size, finalized inspection Items of the test procedures used in the test (see Table 6, Table 4 of the:2008 edition); --- Added additional information requirements (see 7:2); --- Increased the provisions of the basic safety requirements (see Chapter 8 ~ Chapter 15, Appendix F); --- The temperature rise requirement increases the option of the ball pressure test (see 8:1); --- Increased temperature rise test device requirements (see 8:2); --- Added test procedure B, and the original test procedure A constitutes the two main test procedures of this document (see 8:2, Table 13, Table 14, 10:3, 11:4); --- The requirement for the use of sockets is added to the terminal (8:4:6); --- Added basic work function requirements using PWM and other action methods (see 9:2:2); --- Added the requirements for dielectric withstand voltage in special cases of test procedure B (see 10:3); --- Changed the electrical durability (see Chapter 11, Chapter 14 of the:2008 edition); --- Changed the insulation coordination in accordance with the basic safety standards IEC 60664-3, IEC 60664-4 and IEC 60664-5 (see Chapter 13); --- Change Appendix B "Contact Inductive Load" from "Normative" to "Informative" (see Appendix B, Appendix K of the:2008 edition); --- Increased test equipment (see Appendix C): This document is equivalent to IEC 61810-1:2015 "Basic Electromechanical Relays Part 1: General Rules and Safety Requirements": The following editorial changes have been made to this document: --- Incorporates the technical corrigenda of IEC 61810-1:2015/COR1:2017 and IEC 61810-1:2015/COR2:2018, The position of the outer margin of the clause involved is marked with a vertical double line (‖); ---Incorporated the amendments to IEC 61810-1:2015/AMD1:2019, and the outer margins of the terms involved are marked with vertical double lines (‖); --- Changed the list of normative references in Chapter 2; ---Corrected the version number and corresponding article number of the document cited in the source of the term "functional insulation" in 3:7:1 (corrected from 1:3:17:1 to 3:17:1); --- A note to explain the footnote number "k" has been added to Table 14; --- Corrected the nature of Appendix A and Appendix O according to the reference method in the text; ---Increased the English equivalent word index: 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 by the Ministry of Industry and Information Technology of the People's Republic of China: This document is under the jurisdiction of the National Standardization Technical Committee (SAC/TC217) with or without electrical relays: This document is drafted by: Xiamen Hongfa Acoustics Co:, Ltd:, Zhangzhou Hongfa Acoustics Co:, Ltd:, China Electronics Standardization Institute: The main drafters of this document: Li Huiping, Lin Weilin, Zhang Desheng, Wang Jue: The release status of previous versions of this document and the documents it replaces are as follows: ---This document was first published as GB/T 21711:1-2008 in:2008; --- This is the first revision:

Introduction

In order to standardize the development, testing, quality assessment and use of relay products in my country, and promote the steady and coordinated development of the relay industry: GB/T 21711 "Basic Electromechanical Relays" is the basic product specification for various basic electromechanical relays, and it is proposed to be composed of seven parts: --- Part 1: General and safety requirements: The purpose is to determine the fundamentals of basic electromechanical relays used in various fields of electrical or electronic engineering Functional and safety requirements and safety-related characteristics: --- Part 2: Reliability: The purpose is to standardize the requirements for reliability assessment of basic electromechanical relays: --- Part 2-1: Reliability B10 value verification procedure: The purpose is to standardize the reliability index assessment and evaluation of basic electromechanical relays: Reliability growth requirements assessment requirements: --- Part 3: Forced positioning (mechanical interlock) contact relays: The purpose is to increase the applicable requirements based on the general requirements of Part 1: Particular requirements for relays with positively positioned (mechanical interlock) contacts: --- Part 4: General rules and safety requirements for reed relays: The purpose is to be suitable for reed relays in general control circuits Establish basic functional and security requirements: --- Part 7: Test and measurement procedures: The purpose is to specify test and measurement procedures applicable to basic electromechanical relays: --- Part 10: Additional functional characteristics and safety requirements for large-capacity relays: The purpose is to base on the general requirements of Part 1, Add additional functional features and safety requirements applicable to large-capacity relays: Basic Electromechanical Relays Part 1: General principles and safety requirements

1 Scope

This document applies to basic electromechanical relays (non-timed with or without relays) for low-voltage (maximum 1000V AC or 1500V DC circuits) equipment, Specifies the basic functional and safety requirements and safety-related characteristics of basic electromechanical relays used in various fields of electrical or electronic engineering: These application areas are: --- General industrial equipment; --- Electrical facilities; ---Electrical machinery; ---Household and similar electrical appliances; ---Information technology and business equipment; ---Building automation equipment; ---Automation equipment; ---Electrical installation equipment; ---Medical equipment; ---controlling device; ---Telecommunications equipment; --- Vehicles; --- Means of transportation (for example, railways): Compliance with the requirements of this document is verified by the specified type tests: If requirements beyond the scope of this document are specified due to the use of the relay, the relay shall comply with the corresponding IEC standard according to the use: (such as IEC 60730-1, IEC 60335-1, IEC 60950-1) for assessment:

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, Only the version corresponding to the date applies to this document; for undated references, the latest version (including all amendments) applies to this document: GB/T 2900:63-2003 Electrotechnical Terminology Basic Relay (IEC 60050-444:2002, 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 21711:7-2018 Basic electromechanical relays Part 7: Test and measurement procedures (IEC 61810-7:2006, IDT) IEC 60038 IEC standard voltages (IEC standard voltages) Note: GB/T 156-2017 standard voltage (IEC 60038:2009, MOD) Part 2-2:Tests-TestB:Dryheat) Note: GB/T 2423:2-2008 Environmental testing for electrical and electronic products Part 2: Test method Test B: High temperature (IEC 60068-2-2:2007, IDT) IEC 60068-2-17 Basic environmental testing procedures Part 2-17: Test method Test Q: Sealing Note: GB/T 2423:23-2013 Environmental testing Part 2: Test method Test Q: Sealing (IEC 60068-2-17:1994, IDT) IEC 60068-2-20:2008 Environmental testing Part 2-20: Test method Test T: Solderability of leaded components ......

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Question 1: How long will the true-PDF of GB/T 21711.1-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21711.1-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21711.1-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21711.1-2023_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 21711.1-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21711.1-2023 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.