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GB/T 21711.10-2025Electromechanical elementary relays - Part 10: Additional functional aspects and safety requirements for high-capacity relays (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 30, 2025

Implementation date

May 30, 2025

Scope

GB/T 21711.10-2025 (Electromechanical elementary relays - Part 10: Additional functional aspects and safety requirements for high-capacity relays) is available as an English-translated PDF.

GB/T 21711.10-2025 — The additional functional and safety requirements in this document apply to basic electromechanical relays (non-definite time all or nothing relays) with high capacity requirements, Large capacity requirements such as breaking or short-circuiting capabilities, similar to low voltage electrical equipment.

These relays incorporate a specific design (such as magnetic arc blowing) Used to extinguish the arc between contacts, or use insulation coordination not covered by GB/T 21711.1-2023 (such as using gas to fill the contact cavity).

(fill), or safety assessment requirements not covered by GB/T 21711.1-2023 (such as higher loads).

This document defines additional requirements for high capacity relays with general performance that can be used in smart grids, electric vehicles and Other applications, such as switching for battery charge/discharge, include. a) Electrical energy storage systems; b) Photovoltaic energy systems; c) electric road vehicles and electric construction vehicles; d) power electronic systems and equipment; e) cells and batteries; f) Road vehicles.

Compliance with the requirements of this document is verified by specified type tests.

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Document preview — GB/T 21711.10-2025

National Standard of the People's Republic of China

ICS: 29.120.70; 31.220.99
Classification: L 25

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
3.5 Terms and definitions related to contacts
4 Influence
5 Rated value
5.6 Electrical durability
5.7 Working speed
5.8 Contact load
6 General test rules
7 Documents and logos
8 Temperature rise
8.4.4 Threaded and unthreaded terminals
8.4.5 Alternative terminal types
8.4.6 Socket
9 Basic working functions
10 Dielectric withstand voltage
11 Electrical durability
11.1 General
11.2 Overload test
11.3 Severity Level
12 Mechanical durability
13 Clearances, creepage distances and solid insulation
13.1 General
13.2 Clearance and creepage distances
13.3 Solid insulation
13.3.1 General
13.3.2 Partial discharge
13.6 System Insulation Coordination Assessment
13.6.1 General
13.6.2 Specific procedures
13.6.3 Condition
13.6.4 Test Procedure
13.6.5 Data evaluation
14 Lead terminal
14.1 General
14.2 Threaded and unthreaded terminals
15 Seal
16 Heat and fire resistance
17 Special Test
Appendix A (Normative) Interpretation of relays
Appendix B (Informative) Test Device
Appendix C (Normative) Test Device
Appendix D (Informative) Special loads
Appendix E (Normative) Temperature rise test configuration
Appendix F (Normative) Measurement of electrical clearance and creepage distance
Appendix G (Normative) Relationship between rated impulse voltage, rated voltage and overvoltage category
Appendix H (Normative) Pollution Degree
Appendix I (Normative) Tracking resistance test
Appendix J (Informative) Terminal Series Diagram
Appendix K (Normative) Glow-wire test
Appendix L (Normative) Ball Pressure Test
Appendix M (Informative) Needle flame test
Appendix N (Informative) Standard welding process resistance
Appendix O (Informative) Risk Assessment
Appendix P (Informative) Mechanical properties of lead terminals
P.1 General
P.2 Mechanical strength of lead terminals
P.2.1 General
P.2.2 Test procedure
P.2.3 Requirement
P.3 Bending test (conductor damage and accidental loosening test)
P.3.1 General
P.3.2 Test procedure
P.3.3 Requirement
P.4 Pull-out test
P.4.1 General Principles
P.4.2 Test procedure
P.4.3 Requirement
Appendix Q (Normative) Long-term stability of seals (leakage rate evaluation)
Q.1 General
Q.2 Test procedure
Q.2.1 Preprocessing
Q.2.2 Evaluation
Q.2.3 Requirement
Appendix R (Informative) Short-circuit capacity
R.1 General
R.2 Test procedure
R.2.1 General
R.2.2 Pretreatment
R.2.3 Test circuit setting
R.2.4 Test procedure and/or sequence
R.3 Requirement
R.4 Test conditions
Appendix S (Informative) Special Application Test Photovoltaic System
S.1 General
S.2 Insulation coordination
S.3 Product marking
S.4 Performance requirements---Electrical durability
S.5 Type test
S.5.1 Overview
S.5.2 Short circuit test
S.5.3 Critical DC load current test
S.5.4 Climate test
S.5.5 Special tests - salt spray, vibration and shock
Appendix T (informative) Special application test road vehicles
T.1 General
T.2 Road vehicles
T.2.1 General requirements
T.2.2 Instantaneous drop in supply voltage
T.2.3 Reset behavior when coil voltage drops
T.2.4 Coil overvoltage
T.2.5 Slow drop and rise of supply voltage
T.2.6 Electrical durability
T.2.7 Noise
T.2.8 Vibration
T.2.9 Impact
References
Figure 1 Test procedure for system evaluation
Figure P.1 Bending test equipment
Figure Q.1 Temperature cycle
Figure R.1 Short-circuit current capability test circuit
Figure T.1 Instantaneous voltage drop of the system nominal voltage
Figure T.2 Reset test supply voltage
Figure T.3 PSD of acceleration vs. frequency
Figure T.4 PSD of acceleration vs. frequency
Table 1 Type test
Table 2 Required relay information
Table 3 Test wires with test current greater than 400A and not exceeding 800A determined by the current carried by the lead-out terminals
Table 4 Test copper busbar with test current greater than 400A and not exceeding 1000A determined by the current carried by the lead-out terminal
Table 5 Dielectric Withstand Voltage --- AC
Table 6 Dielectric Withstand Voltage --- DC
Table 7 Minimum electrical clearance in air for insulation coordination
Table B.1 Verification of closing and opening capabilities (abnormal conditions)
Table B.2 Verification of closing and opening capabilities (normal conditions)
Table B.3 Electrical durability test
Table G.1 Rated voltage of power supply system and equipment when overvoltage protection is provided by the arrester specified in GB/T 21711.1
The corresponding relationship between the rated impulse voltage
Table P.1 Tightening torque for verifying the mechanical strength of threaded terminals
Table P.2 Round copper conductor pull-out and bending test values
Table P.3 Flat copper conductor pull-out test values
Table S.1 Specific tests for photovoltaic systems
Table S.2 Action cycle times
Table S.3 Special test
Table T.1 Special tests for road vehicles
Table T.2 Un=12V system supply voltage
Table T.3 Un=24V system supply voltage
Table T.4 PSD vs. frequency
Table T.5 PSD vs. frequency
Table T.6 PSD vs. frequency, additional test when the natural frequency fn of the device under test is less than 30 Hz

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 10 of GB/T 21711 "Basic electromechanical relays". GB/T 21711 has been published in the following parts.

--- Part 1: General and safety requirements;

--- Part 2: Reliability;

--- Part 2-1.Reliability B10 value verification procedure;

--- Part 3: Forced positioning (mechanical interlocking) contact relays;

--- Part 7: Test and measurement procedures.

--- Part 10: Additional functional characteristics and safety requirements for large capacity relays.

This document is equivalent to IEC 61810-10:2019 "Basic electromechanical relays - Part 10: Additional functional characteristics of large capacity relays and Safety Requirements.

The following minimal editorial changes were made to this document.

--- According to the content of 14.2, the additional reference of the test items of "threaded terminal and non-threaded terminal (when applicable)" in Table 1 is increased "IEC 60999-2";

--- Added Note 2 to Table 4.

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, this GB/T 21711 "Basic Electromechanical Relays". GB/T 21711 is the basic product specification for various basic electromechanical relays. It is planned to consist of seven parts.

composition.

--- Part 1: General and safety requirements. The purpose is to determine the 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 of basic electromechanical relays and reliability growth requirements assessment requirements.

--- Part 3: Forced positioning (mechanical interlocking) contact relays. The purpose is to add applicable Special requirements for forced positioning (mechanical interlocking) contact relays.

--- Part 4: General and safety requirements for reed relays. The purpose is to provide reed relays suitable for general control circuits.

Establish basic functional and safety requirements.

--- Part 7: Test and measurement procedures. The purpose is to specify the 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 Add additional functional characteristics and safety requirements applicable to large-capacity relays.

Basic Electromechanical Relays Part 10: Additional functional characteristics and features of large capacity relays Security Requirements

1 Scope

The additional functional and safety requirements in this document apply to basic electromechanical relays (non-definite time all or nothing relays) with high capacity requirements, Large capacity requirements such as breaking or short-circuiting capabilities, similar to low voltage electrical equipment. These relays incorporate a specific design (such as magnetic arc blowing) Used to extinguish the arc between contacts, or use insulation coordination not covered by GB/T 21711.1-2023 (such as using gas to fill the contact cavity).

(fill), or safety assessment requirements not covered by GB/T 21711.1-2023 (such as higher loads).

a) Electrical energy storage systems;

b) Photovoltaic energy systems;

c) electric road vehicles and electric construction vehicles;

d) power electronic systems and equipment;

e) cells and batteries;

f) Road vehicles.

Compliance with the requirements of this document is verified by specified type tests.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 16935.1-2023 Insulation coordination for equipment in low voltage systems Part 1: Principles, requirements and tests (IEC 60664-1.

2020, IDT)

Note. There is no technical difference between the referenced content of GB/T 16935.1-2023 and the referenced content of IEC 60664-1:2007.

GB/T 21711.1-2023 Basic electromechanical relays Part 1: General and safety requirements (IEC 61810-1:2015, IDT) GB/T 21711.7-2018 Basic electromechanical relays Part 7: Test and measurement procedures (IEC 61810-7:2006, IDT) IEC 60060-1:2010 High-voltage test technology Part 1: General definitions and test requirements (High-voltagetesttech-Note. GB/T 16927.1-2011 High voltage test technology Part 1: General definitions and test requirements (IEC 60060-1:2010, MOD) Part 2-14.Tests-TestN.Changeoftemperature) Note. GB/T 2423.22-2012 Environmental testing Part 2: Test method Test N. Temperature change (IEC 60068-2-14:2009, IDT) cedures-Part 2-17.Tests-TestQ.Sealing) Note. GB/T 2423.23-2013 Environmental testing Part 2: Test methods Test Q. Sealing (IEC 60068-2-17:1994, IDT)

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 54 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60664 · IEC 61810 · IEC 60060 · IEC 60068

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