GB/T 10963.1-2020Electrical accessories. Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a. c. operation (English PDF)

Foreword

GB/T 10963 "Overcurrent protective circuit breakers for electrical accessories household and similar places" is divided into the following three parts:

---Part 1: Circuit breakers used for AC;

---Part 2: Circuit breakers for AC and DC;

---Part 3: Circuit breakers for DC:

This part is Part 1 of GB/T 10963:

This section was drafted in accordance with the rules given in GB/T 1:1-2009:

This part replaces GB/T 10963:1-2005 "Electrical accessories for household and similar places with overcurrent protective circuit breakers-Part 1:

Compared with GB/T 10963:1-2005, the main technical changes are as follows:

---Added 5:2:5 Single-pole rated making and breaking capacity (Icn1) rated value requirements (see 5:2:5);

---Added the single-pole rated making and breaking capacity (Icn1) marking requirements (see Chapter 6);

---Increase the electrical clearance between the live parts of different poles and the live parts and some non-contact surfaces after installation can be reduced

Small, but need corresponding test verification (see 8:1:3);

---Added a description between the live parts of different poles "The electrical clearance of the metal parts in the arc extinguishing chamber can be less than 1mm, and the total distance is large:

The provisions of item 1 in Table 4" (see Table 4);

---The rated voltage in the third column under "Minimum Electrical Clearance" is modified to "230/400V, 230V, 400V" (see Table 4);

---Added a description, when ferroalloy or suitably coated ferroalloy is used, it is verified by the test of 9:16 (see 8:1:4:4);

---Added that the circuit breaker should also have the wiring terminals specified in Appendix L (see 8:1:5:2);

---The power consumption requirements are added to the structure and performance requirements (see 8:13);

--- It is stipulated that various forms of wires, hard wires (single core or stranded) and soft wires, shall be tested, and the type of wires shall be specified

The cross-sectional area range of the corresponding test wire (see 9:5:2);

---Added the insulation resistance measurement of the specified auxiliary circuit, and modified the test voltage requirements (see 9:7:4);

--- The 9:7:5 test voltage value is deleted, and its content is specified in 9:7:3 and 9:7:4 respectively (see 9:7:3, 9:7:4,:2005 edition

9:7:5);

---Adjust the structure of 9:7:5, including test general requirements, impulse withstand voltage, leakage current between open contacts and insulation of open contacts

The impulse voltage withstand capability of the edge and basic insulation (see 9:7:5);

--- The number of impulse withstand voltage applications is modified to "5 positive impacts and 5 negative impacts" (see 9:7:5:1);

--- If only one breakdown occurs, the number of additional shocks is modified to "10 additional shocks can be applied" (see 9:7:5:2);

---Verification of the leakage current between the open contacts has been added to verify the leakage current requirements after the test of 9:12:11:4:4 (see 9:7:5:3);

---Increase the requirement to verify the free trip function; for different trip types of circuit breakers, the upper limit value is for each pole current, and the lower limit value is for

All poles connected in series conduct current (see 9:10:3);

---Add 9:12:11:4:4 "Multi-pole circuit breaker single-pole making and breaking capacity test" in the short-circuit test (see 9:12);

---For circuit breakers with rated voltage of 120V or 120/240V, the resistance of the resistor R'is changed from "7:5ohm" to "0:75ohm"

(See 9:12:9:2);

--- In the resistance to abnormal heat and flame test, the parts that do not need to be tested and the parts where the glow wire cannot be directly applied are added

(See 9:15);

---Updated the short circuit test circuit diagram (see Figure 3, Figure 4 and Figure 5);

---Added the graphic logo in Figure 17 (see Figure 17);

---Updated Appendix B (see Appendix B);

--- 9:15 Abnormal heat resistance and flame resistance test are independent of program A2, update test program B according to the latest 9:7, add E3 multi-pole disconnect

The single-pole making and breaking capacity test of the device (see Appendix C):

The translation method used in this section is equivalent to the IEC 60898-1:2015 ``Overcurrent protective circuit breakers for electrical accessories household and similar places

Part 1: Circuit Breakers Used for AC":

The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows:

---GB/T 2900 (all parts) Electrical terminology [IEC 60050 (all parts)];

---GB/T 4208-2017 enclosure protection level (IP code) (IEC 60529:2013, IDT);

---GB/T 5023 (all parts) PVC insulated cables with rated voltages of 450/750V and below [IEC 60227 (all parts)

Minute)];

---GB/T 5169:10-2017 Fire hazard test for electric and electronic products Part 10: Glow wire/hot wire basic test method

Method glow wire device and general test method (IEC 60695-2-10:2013, IDT);

---GB/T 5169:11-2017 Fire hazard test for electrical and electronic products Part 11: Glow wire/hot wire basic test method

Method of Glow Wire Flammability Test Method (GWEPT) (IEC 60695-2-11:2014, IDT) of finished products;

---GB/T 5465:1-2009 Graphical symbols for electrical equipment Part 1: Overview and classification (IEC 60417Database:

2007-01, MOD);

---GB/T 13539 (all parts) low voltage fuse [IEC 60269 (all parts)];

---GB/T 14048:1-2012 Low-voltage switchgear and control equipment Part 1: General (IEC 60947-1:2011,

MOD);

---GB/T 32499-2016 Aluminium wire for connecting devices for clamping parts of any material and copper wires for aluminum-based clamping parts

Connection device (IEC 61545:1996, MOD):

This section has made the following editorial changes:

--- Delete the notes in 5:2:5 that are irrelevant to this part;

--- 9:10:2:2 The disconnection time is consistent with Table 7;

--- Revise Figure 6, the original Figure 6 is missing some content;

---Deleted the abolished international standard numbers in J:10 and updated the references:

This part was proposed by China Electrical Equipment Industry Association:

This part is under the jurisdiction of the National Low Voltage Apparatus Standardization Technical Committee (SAC/TC189):

Drafting organizations of this section: Shanghai Institute of Electrical Apparatus, Zhejiang Chint Electric Co:, Ltd:, Shanghai Liangxin Electric Co:, Ltd:,

Huanyu Group Zhejiang Hi-Tech Co:, Ltd:, Huatong Electromechanical Co:, Ltd:, Garcia Electronics Co:, Ltd:, Shanghai Noak

Electric Co:, Ltd:, Schneider Electric (China) Co:, Ltd: Shanghai Branch, Beijing ABB Low Voltage Electric Co:, Ltd:, Shanghai Siemens Line

Protection System Co:, Ltd:, Zhejiang Tianzheng Electric Co:, Ltd:, Hangzhou Qianlong Electric Co:, Ltd:, Zhejiang Pepsibao Electric Co:, Ltd:

Company, Meigao Electric Technology Co:, Ltd:, Delixi Electric Co:, Ltd:, Sanxin International Electric Shanghai Co:, Ltd:, Zhejiang Renmin Electric Co:, Ltd:

Company, Shanghai Electric Appliance Co:, Ltd: People's Electric Appliance Factory, Shanghai Jialan Intelligent Technology Co:, Ltd:, Wenzhou Huajia Electric Appliance Co:, Ltd:, Gao Neng Gele

Electric Co:, Ltd:, Bull Group Co:, Ltd:

1 Scope

This part of GB/T 10963 applies to AC 50Hz, 60Hz or 50/60Hz, rated voltage does not exceed 440V (phase to phase), rated

AC air circuit breaker with current not exceeding 125A and rated short-circuit capacity not exceeding 25000A:

This part is as consistent as possible with the technical requirements in GB/T 14048:2-2008:

These circuit breakers are used to protect building wiring facilities from overcurrent and similar purposes; they are designed for use by untrained personnel,

And no maintenance is required:

The circuit breakers in this section are expected to be used in pollution degree 2 environments:

The circuit breakers in this section are suitable for isolation:

Except for circuit breakers with rated voltages of 120V or 120/240V (see Table 1), the circuit breakers in this section are suitable for use in IT systems

use:

This section also applies to circuit breakers with several rated currents, as long as they change from one rated value to another during normal operation:

The value of the appliance is inaccessible, and its rated value cannot be changed without tools:

This section does not apply to:

---The circuit breaker to protect the motor;

---The circuit breaker whose setting current can be adjusted by the appliance that the user can touch:

For protection levels higher than IP20 in IEC 60529, and often in places with harsh environmental conditions (such as excessive humidity, excessive heat, excessive cold or dust

Deposition) and circuit breakers used in hazardous locations (such as explosion-prone locations) may require special structures:

For the technical requirements for AC and DC circuit breakers, see GB/T 10963:2-2020:

For the technical requirements of circuit breakers equipped with residual current trip devices, see IEC 61009-1, IEC 61009-2-1, IEC 61009-2-2:

Under short-circuit conditions, see Appendix D for guidelines for coordination between circuit breakers and other short-circuit protection devices (SCPD): For the harsher

For voltage conditions, circuit breakers that meet other standards should be used (such as GB/T 14048:2-2008):

For environments with higher pollution levels, a housing with a suitable protection level should be used:

Note: According to its tripping characteristics and device performance, the circuit breaker within the scope of this section can also be used for electric shock protection under fault conditions: For electric shock protection

The scope of application is stipulated by the installation regulations:

This section contains all the requirements necessary to ensure compliance with the operating characteristics required by the type test for the characteristics of such devices:

This section also includes relevant details necessary to ensure the repeatability of the test results:

This section stipulates:

a) The characteristics of the circuit breaker;

b) The conditions that the circuit breaker should meet in the following aspects:

1) The operation and working conditions of the circuit breaker during normal operation;

2) The operation and working conditions of the circuit breaker when overloaded;

3) The operation and working condition of the circuit breaker in a short circuit with rated short-circuit capacity and below;

4) The dielectric performance of the circuit breaker;