1 Scope
This standard specifies the basic requirements for designing 3kV~500kV high voltage electrical switchgear in constructed projects of power plant and substation.
This standard is applicable to the design for AC 3kV~500kV constructed electrical switchgear in power plant and substation projects. The design for extended or renovated electrical switchgear may be carried out referring to this standard.
The foreign project shall be carried out by considering the local national condition and combining the specific circumstance of project.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent modification to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 General Provisions
5 Basic Requirements
5.1 Open Electrical Switchgear
5.2 GIS Electrical Switchgear
6 Environmental Conditions
7 Selection of Conductor and Electrical Equipment
7.1 General Provisions
7.2 Selection of Conductor
7.3 Selection of Electrical Equipment
8 Type and Layout of Electrical Switchgear
8.1 Minimum Safe Clear Space
8.2 Type Selection
8.3 Layout
8.4 Channel and Fence
8.5 Fireproofing and Oil Storage Facilities
9 Requirements of Electrical Switchgear for Building and Structure
9.1 Construction Requirements of Indoor Electrical Switchgear
9.2 Load Condition Requirements of Outdoor Electrical Switchgear Frame
9.3 Requirements of Gas Insulated Switchgear (GIS) Electrical Switchgear for Civil Work
Appendix A (Informative) Pollution Grade Standard of Line, Power Plant and Substation/ Creepage Distance Grade Value under Each Pollution Grade
Appendix B (Informative) Correction of A Value with Altitude Larger than 1080m
Appendix C (Informative) Table of Fire Hazard Type and Lowest Fire Resistance Grade during Building and Structure Production Process
Appendix D (Informative) Minimum Spacing of Building and Structure
Appendix E (Informative) Minimum Safe Clear Space of 750kV Outdoor Electrical Switchgear
