What are the basic requirements of the GB 14048.2 whitch is same as the IEC60947.2

Promulgator : TAIXIDate : 2018-05-05Views : 149

1 basic requirements
This standard is equivalent to the use of the International Electrotechnical Commission IEC60947-2:1995 "Low-voltage switchgear and control equipment - Part 2: Low-voltage circuit breakers." GB/T 14048.1-2000 (Low-voltage switchgear and control equipment General Provisions) provisions apply to this standard, where the standard cited in the general provisions of the article, table, drawing and appendix are marked with "see GB/T 14048.1-200. Medium XXX",
1.1 Scope of application
This standard applies to circuit breakers whose main contacts are used to connect persons whose rated voltage does not exceed the AC 10 00V or DC 15 00V circuit. This standard also specifies supplementary requirements for circuit breakers with fuses.
This standard applies to any rated current, circuit breakers of various types or various intended uses. The requirements for circuit breakers used for ground protection are included in Appendix B. Additional requirements for electronic over-current protection circuit breakers are included in Appendix F.
Additional requirements for IT system breakers are included in Appendix H.
Supplementary requirements for circuit breaker as direct starters are specified in GB 1 4048.4.
The requirements for Circuit Breaker designed for conductor protection in buildings and similar places and for use by unskilled personnel are specified in GB 10963.
The requirements for circuit breaker for equipment (such as electrical equipment) are specified in GB 17701.
For certain circuit breakers for specific applications (such as traction, rolling mills and ships), the necessary special provisions and supplementary requirements may be made.
Note: The circuit breakers referred to in this standard may be equipped with devices that can be automatically disconnected under predetermined conditions other than overload and undervoltage, such as reverse power or reverse current disconnect devices. This standard does not involve verification of actions under this predetermined condition.
The purpose of this standard is to provide:
1) Characteristics of residual current devices;
2) Conditions that the residual current devices should meet in the following cases:
a) Action and performance during normal operation;
b) Actions and performance under overload conditions and actions and performance including short-circuit conditions in conjunction with operation (eg, selective and backup protection combinations);
c) Dielectric properties;
3) Tests and test methods used to demonstrate the achievement of the above conditions;
4) The parameters indicated or given on the residual current devices.
1.2 Reference Standard
The provisions contained in the following standards are incorporated into this standard and constitute the provisions of this standard. At the time of publication, the editions indicated were valid. All standards will be revised and all parties using this standard should explore the possibility of using the latest version of the following standards.
GB/T 2423.4-1993 Basic environmental test procedures for electric and electronic products Test Db: Alternating heat and humidity test method (eqvI EC60 06 8-2-30: 1 98 0)
GB/T 2900.18-1992 Electrotechnical terminology Low-voltage apparatus (eqvI EC 60050(441): 1984)
GB/T 4207-1984 Method for the determination of tracking index and leakage tracking index of solid insulation materials under wet conditions (eqv IEC 60112 :1199)
GB 4824-2001 Industrial, scientific, and medical (methods and limits for electromagnetic disturbance characteristics of (ISM) radio frequency equipment ((neqCI SP R I I: 19 9 0)
GB 6829-1995 General requirements for residual current operated protectors (eqv IEC 60755:1 983)
GB 7251.1-1997 Low-voltage switchgear and control equipment Part 1: Type test and part type test equipment (id t I E C 60 43 9- 1: 19 92)
GB/T 7676.1 ---7676.9- 1998 Direct acting analogue indicating electrical measuring instruments and their accessories (idtIE C 60051-1.60051-9: 1984 )
GB 9254-1998 Radio disturbance limits and measurement methods for information technology equipment (idtC ISPR22: 1997)
GB 10963-1999 Overcurrent protection circuit breakers for household and similar applications (idt IEC 60898:1995)
GB 13539.1-1992 Low-voltage fuses Basic requirements (neq IEC 60269-1:1986)
GB 13539.2--1992 Supplementary requirements for fuses for use by full-time personnel in low-voltage fuses (neq IEC 60269-2:1986)
GB 13539.3-1999 Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (mainly for household and similar fuses) (idt IEC 60269-3-.1987)
GB/T 14048.1-2000 Low-voltage switchgear and control equipment General (eqv IEC 60947-1:1999)
GB 14048.4-1993 Low-voltage switchgear and control equipment Low-voltage electromechanical contactors and motor starters (eqv IEC60947-4-1: 1990)
GB 14821.1-1993 Electrical installations of buildings Protection against electric shock (eqvI EC 60364-4-41:1992)
GB 16916.1-1997 Residual current operated circuit-breakers without overcurrent protection for household and similar uses (RCCB) Part 1: General rules (id t I E C 61 00 8-1 : 1 99 0)
GB 16917.1-1997 Residual current operated circuit-breakers with overcurrent protection (RCBO) for household and similar use Part 1: General rules (i dt I E C 61 0 09 -1 :1 99 1)
GB/T 17626.2-1998 Electromagnetic compatibility Testing and measurement techniques Electrostatic discharge immunity test (idt IEC 61000-4-2:1995 )
GB/T 17626.3 -1998 Electromagnetic compatibility Testing and measurement technology Radio-frequency electromagnetic field radiation immunity test (idt IEC61000-4-3 :1995)
GB/T 17626.4 -1998 Electromagnetic compatibility Testing and measurement techniques Electrical fast transient burst immunity test (idt IEC61000- 4-4 : 1995)
GB/T 17626.5-1999 Electromagnetic compatibility Testing and measurement techniques Surge (impact) immunity test (idt IEC 61000-4-5:1995)
GB/T 17626.6 -1998 Electromagnetic compatibility Testing and measurement techniques Radiated field induced conducted disturbance immunity (idt IEC61000- 4-6 : 1996)
GB/T 17626.11-1999 Electromagnetic compatibility Testing and measurement techniques Voltage sag, short interruptions and voltage variations immunity test (idt IEC 61000- 4-11 : 1994)
GB 17701-1999 Circuit Breaker for Equipment (idt IEC 60934.1993)