Standards

DL/T 2852-2024 Active

DL/T 2852-2024 Power Internet of Things edge communication technology requirements

This document specifies the system architecture, local communication technology requirements, and northbound communication technology requirements for power IoT edge-end communication. This document is applicable to the design and development of power IoT edge-end communication.

Publish Date: 2024-12-25

DL/T 2851-2024 Active

DL/T 2851-2024 Electricity 5G terminal testing specification

This document specifies the testing requirements, functional testing, performance testing, security testing, adaptability testing, electrical performance testing, and marking and labeling testing methods for power 5G terminals. This document is applicable to the selection of power 5G terminals for network deployment, equipment spot checks, and pre-commissioning acceptance testing.

Publish Date: 2024-12-25

DL/T 2850-2024 Active

DL/T 2850-2024 Guidelines for monitoring and locating the breakdown and discharge of gas-insulated metal-enclosed transmission lines

This document specifies the monitoring system for breakdown and discharge of gas-insulated transmission lines (GILs), technical requirements, on-site deployment, monitoring and positioning, and detection and maintenance. This document is applicable to the monitoring and positioning of breakdown and discharge in AC GILs with a rated voltage of 72.5kV to 1100kV. GILs of other voltage levels should refer to this document for implementation.

Publish Date: 2024-12-25

DL/T 2849-2024 Active

DL/T 2849-2024 Performance Test Specification for Gas Turbine Air Filter

This document specifies the test requirements, test equipment, test procedures, and test results for the performance testing of air filter units used in gas turbines. This document is applicable to the performance testing, grading, and evaluation of static and dynamic air filter units used in gas turbines.

Publish Date: 2024-12-25

DL/T 2848-2024 Active

DL/T 2848-2024 Guidelines for inspection and testing of transform station insulators

This document specifies the maintenance and testing requirements for converter station bushings. This document applies to DC wall-penetrating bushings of various voltage levels used in converter stations, valve side bushings and grid side bushings used in converter transformers (hereinafter referred to as converter station bushings). This document does not apply to bushings used in flexible direct current converter stations.

Publish Date: 2024-12-25

DL/T 2847-2024 Active

DL/T 2847-2024 Acceptance and Handover Technical Guidelines for Hard Polymer Insulators Used in High Voltage Aerial Lines

This document specifies the technical requirements, factory acceptance, arrival acceptance, and handover acceptance for rigid polymer insulators used in high-voltage overhead lines. This document applies to rigid polymer insulators (hereinafter referred to as insulators) used in AC systems with a nominal voltage higher than 1000V.

Publish Date: 2024-12-25

DL/T 2846-2024 Active

DL/T 2846-2024 AC System Bushing Voltage and Current Simultaneous Test Method (DL/T 2846-2024)

This document specifies the test voltage, test current, and test time for the combined voltage and current tests of bushings used in AC systems, as well as the test specimens, specimen arrangements, test methods, test records, and related information. This document is applicable to capacitor transformer bushings and reactance bushings used in AC systems with voltage levels of 500 kV to 1000 kV. Transformer bushings, reactance bushings, and grid-side bushings of transformers in other voltage levels can refer to this document for implementation.

Publish Date: 2024-12-25

DL/T 2845-2024 Active

DL/T 2845-2024 Guidelines for categorizing and controlling the coverage of insulator algae

This document specifies the general requirements for the classification of algae coverage on insulators in the field and prevention and control technologies, including classification standards and prevention and control measures. This document is applicable to the classification of algae on the surfaces of power equipment operating at voltages of 1,000V or higher in AC systems, and 1,500V or higher in DC systems.

Publish Date: 2024-12-25

DL/T 2844-2024 Active

DL/T 2844-2024 Intelligent maintenance guidelines for relay protection operation and maintenance

This document specifies the general requirements for intelligent operation and maintenance of relay protection, the functional requirements of the technical support system for relay protection design digitalization, commissioning and acceptance, operation and maintenance, decommissioning, and other business and technical support systems, as well as the technical requirements of intelligent operation and maintenance for relay protection equipment. This document applies to all types of protection devices, merging units, intelligent terminals, comprehensive recording and intelligent operation and maintenance devices for relay protection, process layer switches, and other equipment of power plants with voltages of 35kV and above, as well as their secondary circuits. It also applies to the design, manufacture, construction, modification, acceptance, operation, and maintenance of intelligent operation and maintenance technical support systems. Safety automatic devices can be implemented in accordance with this document.

Publish Date: 2024-12-25

DL/T 2843-2024 Active

DL/T 2843-2024 DL/T 2843-2024 Guidelines for Evaluation of Relay Protection Device Status

This document specifies the general requirements, evaluation indicators, and evaluation methods for the status evaluation of relay protection devices. This document is applicable to the status evaluation of microcomputer-based relay protection devices, secondary circuits, and auxiliary devices (hereinafter referred to as relay protection devices) in conventional and intelligent substations of AC systems. Power plants and other stations may refer to and implement it accordingly.

Publish Date: 2024-12-25

DL/T 2842-2024 Active

DL/T 2842-2024 Guidelines for the technology of load-switched tap-changer used in converter transformers

This document specifies the usage conditions, technical requirements, selection principles, vacuum circuit breaker tests, on-load tap-changer tests, overall tests, marking, packaging, transportation, and storage requirements for on-load tap-changers used in converter transformers for high-voltage direct current (HVDC) transmission projects. This document is applicable to on-load tap-changers used in converter transformers for HVDC transmission projects. For other transformers, the requirements in this document can be used as a reference for implementation.

Publish Date: 2024-12-25

DL/T 2841-2024 Active

DL/T 2841-2024 Guidelines for protecting electromagnetic interference on buried oil and gas pipelines due to power transmission engineering

This document specifies the control values for electromagnetic effects of power transmission and transformation projects on buried steel oil and gas pipelines, electromagnetic impact calculations, and protection requirements. This document is applicable to AC 110kV to 1000kV, DC ±100kV to ±1100kV overhead transmission lines and DC grounding electrodes, which are used to prevent corrosion of buried steel oil and gas pipelines with anti-corrosion layers adjacent to them, and to ensure personal safety and pipeline safety during design.

Publish Date: 2024-12-25