Standard No.:	DL/T 5222-2005
English Name:	Design technical rule for selecting conductor and electrical equi
Chinese Name:	导体和电器选择设计技术规定
Chinese Classification:	P62    Power transmission and transformation engineering
Professional Classification:	DL    Professional Standard - Electricity
Issued by:	NDRC
Issued on:	2005-02-14
Implemented on:	2005-6-1
Status:	superseded
Superseded by:	DL/T 5222-2021 Code for design of the conductor and electrical equipment selection
Superseded on:	2022-6-22
Superseding:	SDGJ 14-1986 Design technical regulations for selecting conductor and electrical equipment
Language:	English
File Format:	PDF
Word Count:	31000 words
Price(USD):	400.0
Delivery:	via email in 1 business day

1.0.1 This Rule prescribes the basic requirements for power plants and transformer substations newly-built project selecting (3-500) kV conductor and electrical equipment. 1.0.2 This Rule is suitable for power plants and transformer substations newly-built project selecting (3-500) kV conductor and electrical equipment. For expanded project and reconstructed project, it can refer to use. 1.0.3 Foreign projects will take the country of supply party or buyer into consideration. This Rule is referred to in combination with the physical circumstance of the project.

1 Scope 2. Normative References 3 General principles 4. Terms and Definitions 5 Fundamental Rule 6 Environmental Condition 7 Conductor 7.1 Fundamental rule 7.2 Flexible circuit conductor 7.3 Hard conductor 7.4 Isolated- phase enclosed bus bar 7.5 Enclosed bus bar in one tank 7.6 Cable bus bar 7.7 SF6 gas insulation bus bar 7.8 Power supply cable 8. Power Transformer 9. High-voltage Switching Equipment 9.1 Basic Provisions 9.2 High-voltage breaker 9.3 Generator Breaker 10. Load Switch 10.1 Basic Provisions 10.2 High-voltage load switch 10.3 Recloser 10.4 Sectionalizer 10.5 Vacuum contactor 11. High-voltage Isolation Switch 12. 72.5kV and above Switching Equipment with Gas Insulation Metal Seal 13. AC Switching Equipment with Metal Seal 14. Reactor 14.1 Basic Provisions 14.2 Current limiting reactor 14.3 Parallel Reactor 14.4 Small reactor of neutral point of parallel reactor 15. Current Transformer 16. Voltage Transformer 17 High-voltage Fuse Protector 18. Neutral Point Grounding Equipment 18.1 Extinction Coil 18.2 Grounding Resistance 18.3 Grounding Transformer 19. Frequency Varied Device 20. Overvoltage Protective Device 20.1 Lightning Arrester 20.2 Resistance Capacitance Absorber 21 Insulators and Wall Bushing Annex A (Normative) Wording explanation Annex B (Normative) Insulation Level of High-voltage Power Transmission and Transform Equipment Annex C (Normative) Standard for Classification of Pollutions in Circuits, Power Plants and Transformer Substations Annex D (Informative) Long-term Permissible Current-carrying Capacity and Compensation Factors of Naked Conductors Annex E (Informative) Economic Current Density of Conductor Annex F (Normative) Practical Calculation of Short-circuit Current Annex G (Informative) Name, Symbol and Conversion of Legal Metrological Unit