Cabinets for Low-voltage Switchgear — Part 2: Series of Dimensions
1 Scope
This part specifies the basic information of module selection, module sequence and cabinet examples and matching dimensions of cabinets for low-voltage switchgear.
Note: In general, dimensions refer to basic parameters rather than tolerances or clearances used in manufacturing.
This part is applicable to cabinets for low-voltage switchgear.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 22764. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 3100 The International System of Units and its Application (GB 3100-1993, eqv ISO 1000:1992);
GB 3101 General Principles Concerning Quantities, Units and Symbols (GB 3101-1993, eqv ISO 31-0:1992)
GB/T 19520.2 Mechanical Structures for Electronic Equipment Dimensions of Mechanical Structures of the 482.6mm (19in) Series — Part 2: Cabinets and Pitches of Rack Structures (GB/T 19520.2-2007, IEC 60297-2:1982, IDT)
IEC Guide 103 Guide on Dimensional Co-ordination
3 Basic Information of Module Selection
3.1 General
The reason for choosing module of cabinets for low-voltage switchgear is that it shall be compatible with the dimensions of mechanical interfaces for related engineering applications (such as components, equipment, rooms, buildings, etc.). In addition, information on interfaces with other technical fields and advanced processes and designs is included. Technical and economic benefits can be gained from using this rule.
Foreword II
1 Scope
2 Normative References
3 Basic Information of Module Selection
4 Modular Sequence
5 Cabinet Example and Coordinate Dimension
