GB 10963.1-2005
Electrical accessories-Circuit-breakers for overcurrent protection for household and similar installation Part 1:Circuit-breakers for a.c.operation (English Version)

Standard No.

GB 10963.1-2005

Language

Chinese, Available in English version

Release Date

2005

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2021-06

Replace By

GB/T 10963.1-2020

Latest

GB/T 10963.1-2020

Replace

GB 10963-1999

Scope

This part of GB 10963 applies to AC air circuit breakers with AC 50 Hz or 60 Hz, rated voltage not exceeding 440 V (phase-to-phase), rated current not exceeding 125 A, and rated short-circuit capacity not exceeding 25 000 A. This part is as consistent as possible with the technical requirements in GB 14048.2. These circuit breakers are used to protect the wiring installations of buildings from overcurrent and similar purposes. They are designed for use by untrained personnel and require no maintenance. The circuit breakers in this section are intended for use in Class 2 environments. The circuit breakers in this section are suitable for isolation. Except for circuit breakers with a rated voltage of 120V/240V (see Table 1), as long as they meet the requirements of IEC 60364-4-473-1997+AL-1998, the circuit breakers in this part are suitable for use in IT systems. This standard also applies to circuit-breakers of several rated currents, provided that the appliance changing from one rated value to another in normal operation is not accessible and the rating cannot be changed without a tool. This standard does not apply to: - circuit breakers for the protection of motors: - circuit breakers whose rated current can be adjusted by means accessible to the user. For circuit breakers with a protection level higher than IP 20 in GB4208, and often used in places with severe environmental conditions (such as over humidity, overheating, overcooling or dust deposition) and in hazardous places (such as places prone to explosion), special requirements may be required. Structure. For the technical requirements of AC and DC circuit breakers, see GB10963.2. See GB 16917.1; GB 16917.21 and GB 16917.22 for technical requirements for circuit breakers equipped with residual current tripping devices. Under short-circuit conditions, see Appendix D for guidelines on coordination between circuit breakers and other short-circuit protective devices (SCPDs). Note 1: For more severe overvoltage conditions, it is advisable to use circuit breakers conforming to other standards (such as GB 14048.2). Note 2: For environments with higher pollution levels, enclosures with appropriate protection levels should be used. Note 3: According to its tripping characteristics and device performance, the circuit breakers within the applicable scope of this part can also be used for electric shock protection under fault conditions, and the applicable scope for electric shock protection is specified by the installation regulations. And more severe overvoltage conditions, it is advisable to use circuit breakers that meet other standards (such as GB 14048.2). This standard contains all the technical requirements necessary to ensure compliance with the operating characteristics required by the type tests for the characteristics of such devices. This standard also includes details about test requirements and test methods necessary to ensure the reproducibility of test results. This part 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 in normal operation; 2) The operation and working conditions of the circuit breaker in overload; 3 ) The operation and working conditions of the circuit breaker at the rated short-circuit capacity and below; 4) The dielectric performance of the circuit breaker; c) The test used to confirm that these conditions are met and the method used for the test; d) The marks on the circuit breaker Data, e) the test procedures executed during certification and the number of test items submitted (see Appendix C); f) under short-circuit conditions, the coordination of the circuit breaker with other short-circuit protective devices (SCPD) connected in the same circuit (see Appendix D ); g) Routine tests are carried out on each circuit-breaker in order to reveal impermissible changes in material or manufacture which could affect safety.

GB 10963.1-2005 Referenced Document

• GB 156-1993 Standard voltages
• GB/T 2900.18-1992 Electrotechnical terminology--Low voltage apparatus
• GB/T 3956-1997 Conductors of insulated cables
• GB/T 4208-1993 Classification of enclosure protection class

GB 10963.1-2005 history

• 2020 GB/T 10963.1-2020 Electrical accessories—Circuit-breakers for overcurrent protection for household and similar installations—Part 1: Circuit-breakers for a.c. operation
• 2005 GB 10963.1-2005 Electrical accessories-Circuit-breakers for overcurrent protection for household and similar installation Part 1:Circuit-breakers for a.c.operation
• 1999 GB 10963-1999 Circuit-breakers for overcurrent protection for household and similar installation

GB 10963.1-2005 -All Parts