Current Category: CN-DL - Electricity
This standard applies to the design of new construction, renovation, and expansion projects for underground substations independently built with a voltage rating of 35kV to 500kV.
This standard applies to the design of the main body of new, renovated, and expanded power cable tunnels.
This document specifies the acceptance test requirements for equipment such as converter transformers, thyristor converter valves, primary equipment of DC substations, AC filters, DC lines, and grounding electrodes in ±800kV high-voltage direct current (HVDC) transmission projects. This document is applicable to ±800kV HVDC transmission projects. Other voltage-level HVDC transmission projects may refer to and implement it as appropriate.
This document stipulates the technical principles and requirements for helicopter inspections of overhead transmission lines, including general requirements, preparation before inspection, inspection methods, inspection approaches, inspection requirements, safety requirements, and the organization and transfer of inspection data. This standard applies to helicopter inspections of AC and DC overhead transmission lines with voltages of 110 (66) kV and above. Helicopter inspections of overhead power lines with voltages of 35 kV and below can be implemented with reference to this standard.
This document specifies the test items, technical requirements, and judgment criteria for the on-site acceptance and commissioning of gas-insulated metal-enclosed transmission lines (GILs). This document applies to on-site acceptance and commissioning tests before the commissioning of new and expanded AC GILs with a rated voltage of 72.5 kV and above and a frequency of 50 Hz, installed in various laying modes. The disassembly and overhaul of GILs can be implemented with reference to this document. Other frequencies and DC GILs can be implemented with reference to this document. The relevant requirements for 1100 kV GILs are included in DL/T 5846.
This document stipulates the general requirements for the operation of 1000kV AC overhead transmission lines, component requirements, operational requirements, special section requirements, maintenance requirements for the line protection zone, environmental protection, and technical documentation. This document is applicable to the operation and maintenance of 1000kV AC overhead transmission lines.
This document specifies the general requirements, preparation for maintenance, maintenance requirements, acceptance requirements, and commissioning tests for 1100kV gas-insulated metal-enclosed switchgear (hereinafter referred to as GIS). This document is applicable to AC GIS with a rated voltage of 1100kV (including HGIS).
This document specifies the general requirements, preparation for maintenance, maintenance requirements, acceptance requirements, and commissioning monitoring for the maintenance of 1000kV capacitive voltage transformers. This document is applicable to the on-site maintenance of 1000kV capacitive voltage transformers.
This document specifies the general requirements for on-site inspection of 1000kV power transformers, testing equipment, accuracy testing of voltage transformers, accuracy testing of current transformers, and the processing of inspection results. This document is applicable to on-site inspection of the measurement accuracy of 1000kV power transformers.
This document specifies the data transmission format and universal instruction set used by the dam safety monitoring automation system. This document is applicable to the data communication of dam safety monitoring automation system equipment that uses EIA-485/422, Ethernet (TCP/IP), or other communication interfaces that comply with international standards, and is networked in a master-slave response mode.
This document specifies the altitude correction requirements for the uniform creepage distance of insulators used in transmission lines. This document is applicable to transmission lines in areas with an altitude of 1000m to 5500m, and for insulators used in AC 1000V and DC ±1500V and higher systems. The altitude correction method for the uniform creepage distance of insulators and bushings used in substations under high-altitude pollution conditions can be referred to this document for implementation.
This document specifies the requirements for the design, testing, operation and maintenance of high-voltage DC grounding electrodes, as well as the assessment and protection against the impact on surrounding facilities. This document is applicable to grounding electrodes used in high-voltage DC transmission systems.