1 Scope
This part of GB 7251 defines the specific requirements of power switchgear and controlgear assemblies (PSC-ASSEMBLIES) as follows:
- ASSEMBLIES for which the rated voltage does not exceed 1000V in case of a.c. or 1500V in case of d.c.;
- stationary or movable ASSEMBLIES with or without enclosure;
- ASSEMBLIES intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment;
- ASSEMBLIES designed for use under special service conditions, for example in ships and in rail vehicles provided that the other relevant specific requirements are complied with;
- ASSEMBLIES designed for electrical equipment of machines. Supplementary requirements for ASSEMBLIES forming part of a machine are covered by the IEC 60204 series.
This standard applies to all ASSEMBLIES whether they are designed, manufactured and verified on a one-off basis or fully standardized and manufactured in quantity.
The manufacture and/or assembly may be carried out other than by the original manufacturer (see 3.10.1).
This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant product standards. This standard does not apply to the specific types of ASSEMBLIES covered by other parts of GB 7251. For ASSEMBLIES not covered by other parts this part applies.
Note 1: throughout this part, the abbreviation PSC-ASSEMBLY (see 3.1.101) is used for a power switchgear and controlgear ASSEMBLY.
Note 2: supplementary requirements for ASSEMBLIES in ships are covered by IEC 60092-302.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
This clause of Part 2 is applicable except as follows.
Addition:
GB 14048.3-2008 Low-voltage Switchgear and Controlgear - Part 3: Switches Disconnectors Switch-disconnectors and Fuse-combination Units (IEC 60947-3:2005, IDT)
GB 7251.1-2013 Low-voltage Switchgear and Controlgear Assemblies - Part 1: General Rules (GB 7251.1-2013, IEC 61439-1:2011, IDT)
IEC 61140 Protection against Electric Shock - Common Aspects for Installation and Equipment
3 Terms and Definitions
This terms and definitions of GB 7251.1 are applicable except as follows.
3.1 General terms
Additional definitions:
3.1.101
Power switchgear and controlgear assembly (PSC-ASSEMBLY)
Low-voltage switchgear and controlgear assembly used to distribute and control energy for all types of loads, intended for industrial, commercial and similar applications where operation by ordinary persons is not intended
Note: it is not excluded for a PSC-ASSEMBLY to be located in an area accessible to ordinary persons.
Foreword i
Introduction iii
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols and Abbreviations
5 Interface Characteristics
6 Information
7 Service Conditions
8 Constructional Requirements
9 Performance Requirements
10 Design Verification
11 Routine Verification
Appendixes
Appendix AA (Informative) Forms of Internal Separation (See 8.101)
Appendix BB (Informative) Items Subject to Agreement between the ASSEMBLY Manufacturer and the User
Bibliography
Figure AA.1 Symbols Used in Figures AA.2 and AA
Figure AA.2 Forms 1 and
Figure AA.3 Forms 3 and
Table 101 Values of Assumed Loading
Table 102 Test voltages Across the Open Contacts of Equipment Suitable for Isolation
Table 103 Electrical Conditions for the Different Positions of Withdrawable Parts
Table 104 Forms of Internal Separation
Table BB.1 Items Subject to Agreement between the ASSEMBLY Manufacturer and the User
Standard
GB 7251.12-2013 Low-voltage Switchgear and Controlgear Assemblies - Part 2: Power Switchgear and Controlgear Assemblies (English Version)
Standard No.
GB 7251.12-2013
Status
superseded
Language
English
File Format
PDF
Word Count
8000 words
Price(USD)
200.0
Implemented on
2015-1-13
Delivery
via email in 1 business day
Detail of GB 7251.12-2013
Standard No.
GB 7251.12-2013
English Name
Low-voltage Switchgear and Controlgear Assemblies - Part 2: Power Switchgear and Controlgear Assemblies
1 Scope
This part of GB 7251 defines the specific requirements of power switchgear and controlgear assemblies (PSC-ASSEMBLIES) as follows:
- ASSEMBLIES for which the rated voltage does not exceed 1000V in case of a.c. or 1500V in case of d.c.;
- stationary or movable ASSEMBLIES with or without enclosure;
- ASSEMBLIES intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment;
- ASSEMBLIES designed for use under special service conditions, for example in ships and in rail vehicles provided that the other relevant specific requirements are complied with;
- ASSEMBLIES designed for electrical equipment of machines. Supplementary requirements for ASSEMBLIES forming part of a machine are covered by the IEC 60204 series.
This standard applies to all ASSEMBLIES whether they are designed, manufactured and verified on a one-off basis or fully standardized and manufactured in quantity.
The manufacture and/or assembly may be carried out other than by the original manufacturer (see 3.10.1).
This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant product standards. This standard does not apply to the specific types of ASSEMBLIES covered by other parts of GB 7251. For ASSEMBLIES not covered by other parts this part applies.
Note 1: throughout this part, the abbreviation PSC-ASSEMBLY (see 3.1.101) is used for a power switchgear and controlgear ASSEMBLY.
Note 2: supplementary requirements for ASSEMBLIES in ships are covered by IEC 60092-302.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
This clause of Part 2 is applicable except as follows.
Addition:
GB 14048.3-2008 Low-voltage Switchgear and Controlgear - Part 3: Switches Disconnectors Switch-disconnectors and Fuse-combination Units (IEC 60947-3:2005, IDT)
GB 7251.1-2013 Low-voltage Switchgear and Controlgear Assemblies - Part 1: General Rules (GB 7251.1-2013, IEC 61439-1:2011, IDT)
IEC 61140 Protection against Electric Shock - Common Aspects for Installation and Equipment
3 Terms and Definitions
This terms and definitions of GB 7251.1 are applicable except as follows.
3.1 General terms
Additional definitions:
3.1.101
Power switchgear and controlgear assembly (PSC-ASSEMBLY)
Low-voltage switchgear and controlgear assembly used to distribute and control energy for all types of loads, intended for industrial, commercial and similar applications where operation by ordinary persons is not intended
Note: it is not excluded for a PSC-ASSEMBLY to be located in an area accessible to ordinary persons.
Contents of GB 7251.12-2013
Foreword i
Introduction iii
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols and Abbreviations
5 Interface Characteristics
6 Information
7 Service Conditions
8 Constructional Requirements
9 Performance Requirements
10 Design Verification
11 Routine Verification
Appendixes
Appendix AA (Informative) Forms of Internal Separation (See 8.101)
Appendix BB (Informative) Items Subject to Agreement between the ASSEMBLY Manufacturer and the User
Bibliography
Figure AA.1 Symbols Used in Figures AA.2 and AA
Figure AA.2 Forms 1 and
Figure AA.3 Forms 3 and
Table 101 Values of Assumed Loading
Table 102 Test voltages Across the Open Contacts of Equipment Suitable for Isolation
Table 103 Electrical Conditions for the Different Positions of Withdrawable Parts
Table 104 Forms of Internal Separation
Table BB.1 Items Subject to Agreement between the ASSEMBLY Manufacturer and the User
