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GB/T 21711.1-2023: Electromechanical elementary relays - Part 1: General and safety requirements
Status: Valid GB/T 21711.1: Evolution and historical versions
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Electromechanical elementary relays - Part 1: General and safety requirements
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GB/T 21711.1-2023
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| GB/T 21711.1-2008 | English | 150 |
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Electromechanical elementary relays -- Part 1: General and safety requirements
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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Count Estimation | 94,981 | | Date of Issue | 2023-03-17 | | Date of Implementation | 2023-10-01 | | Older Standard (superseded by this standard) | GB/T 21711.1-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |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
table of contents
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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