GB 50060-1992 3~110kV high voltage distribution equipment design specification
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
50060-92
3~110KV High Voltage Distribution Equipment
Design Code
Design code for high voltageelectrical installationlation
(3~110kv）
1992—09—25 Issued
1993—05—01 Implementation
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
3~110KV High Voltage Distribution Equipment
Design Code
GB50060-92
Editor Department: Ministry of Energy of the People's Republic of China Approval Department: Ministry of Construction of the People's Republic of China Implementation date: May 1, 1993
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the release of the national standard "3~110KV High Voltage Distribution Equipment Design Specification"
Construction Standards (1992] No. 652
According to the requirements of the State Planning Commission's [1986] No. 2630 document, the "3110KV High Voltage Distribution Equipment Design Specification" revised by the Ministry of Energy and relevant departments has been reviewed by relevant departments. The "3~110KV High Voltage Distribution Equipment Design Specification" GB50060-92 is now approved as a mandatory national standard and will be implemented on May 1, 1993. The original "Industrial and Civil Engineering Standards" "35 kV High Voltage Distribution Equipment Design Code" GBJ60-83 is abolished and revised at the same time.
This code is managed by the Ministry of Energy, and its specific interpretation and other work is the responsibility of the Northwest Electric Power Design Institute of the Ministry of Energy. The publication and distribution is organized by the Standard and Norms Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
September 25, 1992
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Revision Notes
This code is compiled by the Northwest Electric Power Design Institute of the Ministry of Energy and relevant units in accordance with the requirements of the State Planning Commission's Document No. 2630 [1986]. During the revision process, the code group conducted After extensive investigation and research, we carefully summarized the experience since the implementation of the original specification, absorbed some scientific research results, and widely solicited opinions from relevant units across the country. Finally, our department reviewed and finalized it together with relevant departments. This specification is divided into six chapters and three appendices. The main contents of this revision are: general principles, general provisions, environmental conditions, conductors and electrical appliances, safe clearance, selection of distribution device types, passages and fences, fire prevention and oil storage facilities, and requirements for buildings and structures of distribution devices.
During the implementation of this specification, if you find that there is a need for modification or supplementation, please send your opinions and relevant materials to Xi'an Northwest Electric Power Design Institute (postal code: 710032), and copy to our Electric Power Planning and Design Institute for reference in future revisions. Source
June 1991bzxZ.net
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1 General
Chapter 2
Chapter 3
Chapter 4
Chapter 5
General Provisions
Environmental Conditions
Conductors and Electrical Appliances
Layout of Distribution Equipment
Section 1
Section 2
Section 3
Safety Clearance
Type Selection
Passages and Fences
Section 4
Fire Prevention and Oil Storage Facilities
Chapter 6| |tt||Appendix 1
Appendix 2
Appendix 3
Requirements of distribution equipment for buildings and structures Long-term allowable current carrying capacity of bare conductors
Comprehensive correction coefficient of current carrying capacity of bare conductors at different altitudes and ambient temperatures
Terms used in this specification
Additional explanation
Engineering construction standard full text information system
Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This specification is formulated to implement my country's technical and economic policies in the design of high-voltage distribution equipment (hereinafter referred to as distribution equipment) and achieve safety, reliability, advanced technology, economic rationality and convenient maintenance.
Article 1.0.2 This specification applies to the design of new and expanded 3~110KV distribution equipment projects.
Article 1.0.3 The design of the distribution device shall reasonably select equipment and formulate layout plans based on the nature and capacity of the power load, environmental conditions and requirements for operation, installation and maintenance, and shall adopt effective new technologies, new equipment, new layouts and new materials. Article 1.0.4 The design of the distribution device shall be based on the characteristics, scale and development plan of the project, combining long-term and short-term, focusing on the short-term, and appropriately considering the possibility of expansion. Article 1.0.5 The design of the distribution device must adhere to the principle of land conservation. Article 1.0.6 In addition to implementing the provisions of this specification, the design of the distribution device shall also comply with the provisions of the relevant current national standards and specifications. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
General Provisions
Chapter II
Article 2.0.1 The layout of the distribution device and the selection of conductors, electrical appliances and structures shall meet the requirements of normal operation, installation and maintenance, short circuit and overvoltage conditions under local environmental conditions.
Article 2.0.2 The phase sequence of each circuit of the distribution device should be consistent and should be marked with phase color.
For distribution devices with voltages of 63KV and 110KV, a grounding knife switch or grounding device should be installed on each busbar. A grounding knife switch should be installed on the circuit breaker side of the disconnector on both sides of the circuit breaker and the line side of the line disconnector. Contact surfaces and connection terminals should be left on the hard conductors and grounding wires in the compartment of the indoor distribution device.
Article 2.0.4
A locking device should be installed between the disconnector of the indoor and outdoor distribution devices and the corresponding circuit breaker and grounding knife switch. The indoor distribution device should also be equipped with a group lock device to prevent accidental entry into the live compartment.
Article 2.0.5 The layout of oil-filled electrical equipment should meet the safety and convenience requirements for observing the oil level and oil temperature when energized, and it should be convenient to extract oil samples. Engineering 2 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Heavy Environmental Conditions
Chapter 3
Article 3.0.1 Electrical equipment and insulators in outdoor power distribution devices should adopt corresponding external insulation standards and other dust and corrosion prevention measures according to the degree of pollution, and should be easy to clean.
Article 3.0.2
Regulations.
The ambient temperature for selecting bare conductors and electrical appliances shall comply with Table 3.0.2. The ambient temperature for selecting bare conductors and electrical appliances
Ambient temperature (℃)
Installation location
Bare conductor
Indoor reactor
Other locations in the house
Average maximum temperature in the hottest month
Ventilation design temperature at this location
Annual maximum temperature
Ventilation design maximum wind temperature at this location
Ventilation design temperature at this location
Annual minimum temperature
Note: ①The annual maximum (or minimum) temperature is the multi-year average of the highest (or lowest) temperature measured in a year.
②The average maximum temperature in the hottest month is the monthly average of the daily maximum temperature in the hottest month, and the multi-year average is taken. ③Select the ambient temperature for indoor bare conductors and other electrical appliances. If there is no ventilation design temperature data for this location, the average maximum temperature in the hottest month plus 5℃ can be taken. Article 3.0.3 The relative humidity of conductors and electrical appliances should be selected based on the average relative humidity of the highest humidity month in the local area. In humid tropical areas, humid tropical electrical appliances should be used. In subhumid tropical areas, ordinary electrical appliances can be used, but protective measures should be taken based on local operating experience. Article 3.0.4 When the ambient temperature is lower than the minimum allowable temperature of electrical equipment, instruments and relays, heating devices should be installed or insulation measures should be taken. In areas with severe snow and ice accumulation, measures should be taken to prevent accidents caused by ice and snow. The ice breaking thickness of the disconnector should not be less than the designed maximum ice thickness. Article 3.0.5 When designing distribution equipment and selecting conductors and electrical appliances, the maximum wind speed can be 10 meters above the ground and the average maximum wind speed of 10 minutes once in 30 years. In areas where the designed maximum wind speed exceeds 35m/s, in the layout of outdoor distribution equipment, measures such as lowering the installation height of electrical equipment and strengthening the fixation of equipment and foundation should be taken. Section 3.0.Article 6 The seismic design of the distribution equipment shall comply with the provisions of the current national standard "Code for Seismic Design of Power Facilities". Article 3.0.7 In areas with an altitude of more than 1000m, the distribution equipment shall select electrical appliances and insulators suitable for the altitude, and the impact and power frequency test voltages of their external insulation shall comply with the relevant provisions of the current national standards. Article 3.0.8 For electrical appliances and hardware with a voltage of 110KV, no visible corona should appear on a clear night at 1.1 times the maximum working phase voltage. The critical corona voltage of a 110kV conductor should be greater than the maximum working voltage at the conductor installation location.
Article 3.0.9 For distribution equipment arranged in residential and industrial areas, the noise shall comply with the provisions of the current national standards "Design Specifications for Noise Control of Industrial Enterprises" and "Environmental Noise Standards for Urban Areas".
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 4 Conductors and Electrical Appliances
Article 4.0.1 The maximum allowable working voltage of the electrical appliances selected for design shall not be lower than the maximum operating voltage of the circuit.
The long-term allowable current of the conductors and electrical appliances selected for design shall not be less than the maximum continuous working current of the circuit; the influence of sunshine on the current carrying capacity of outdoor conductors and electrical appliances shall also be taken into account.
Article 4.0.2 Copper conductors shall not be used for the busbars and leads of the distribution device. Article 4.0.3 The insulation level of the distribution device shall comply with the provisions of the current national standard "Design Specifications for Overvoltage Protection of Power Devices". Article 4.0.4 The short-circuit current used to verify the dynamic stability, thermal stability and breaking current of conductors and electrical appliances shall be calculated according to the design planning capacity, and the long-term development plan of the power system shall be considered.
When determining the short-circuit current, it shall be calculated according to the normal wiring method where the maximum short-circuit current may occur.
Article 4.0.5 The short-circuit current for conductors and electrical appliances shall be calculated according to the following conditions:
1. Except for calculating the decay time constant of the short-circuit current, the resistance of the components can be ignored.
2. The influence of asynchronous motors with feedback and the discharge current of capacitor compensation devices shall be taken into account in the electrically connected network. Article 4.0.6 The dynamic stability and thermal stability of conductors and electrical appliances and the short-circuit breaking current of electrical appliances can be verified according to three-phase short circuit. When the single-phase and two-phase ground short circuit is more serious than the three-phase short circuit, it shall be verified according to the serious situation. Article 4.0.7 The calculation time for verifying the thermal effect of conductor short circuit shall be the main protection action time plus the corresponding circuit breaker full opening time. When the main protection has a dead zone, the backup protection action time that acts on the dead zone shall be used, and the corresponding short-circuit current value shall be used.
When checking electrical appliances, it is advisable to use the backup protection action time plus the corresponding circuit breaker full opening time.
Article 4.0.8 For voltage transformer circuits protected by fuses, dynamic stability and thermal stability do not need to be checked.
Conductors and electrical appliances protected by high-voltage current-limiting fuses can have their dynamic stability and thermal stability checked according to the characteristics of the current-limiting fuses.
Article 4.0.9 When checking the current-breaking capacity of the circuit breaker, the short-circuit current of the actual breaking time of the circuit breaker should be taken as the verification condition. For circuit breakers equipped with automatic reclosing devices, the influence of reclosing on the rated breaking current should be taken into account.
Article 4.0.10 Circuit breakers used to cut in parallel compensation capacitor groups should be selected with excellent breaking performance.
Article 4.0.11 The normal maximum operating temperature of a bare conductor should not be greater than +70°C. When considering the influence of sunlight, the steel core aluminum wire and tubular conductor should not be greater than +80°C. When there is a reliable coating of tin plating (sugar) on the contact surface of the bare conductor, its maximum operating temperature can be increased to +85°C.
Article 4.0.12 When verifying the short-circuit thermal stability, the maximum allowable temperature of the bare conductor can be +200°C for hard aluminum and aluminum-manganese alloy, and +300°C for hard copper. The conductor temperature before short circuit should be the operating temperature under rated load. Article 4.0.13 When selecting the cross-section of the bare conductor according to the normal operating current of the circuit, the long-term allowable current carrying capacity of the conductor should be corrected according to the altitude and ambient temperature of the area.
The long-term allowable current carrying capacity of the bare conductor and its correction factor can be implemented in accordance with Appendix 1 and Appendix 2.
When the conductor adopts a multi-conductor structure, the influence of proximity effect and thermal shielding on the current carrying capacity should be taken into account.
Article 4.0.14 For 320KV outdoor post insulators and wall bushings in power plants, products with a higher voltage level can be used. For 3-6KV outdoor post insulators and wall bushings, products with a two-level voltage increase can also be used. Article 4.0.15 During normal operation and short circuit, the maximum force acting on the electrical lead should not be greater than the allowable load of the electrical terminal. The conductors, bushings, insulators and hardware of outdoor power distribution devices should be mechanically calculated according to local meteorological conditions and different stress states. Its safety factor should not be less than the provisions of Table 4.0.15. Safety factors of conductors and insulators
Bushing, support insulators and their hardware
Suspension insulators and their hardware
Soft conductors
Hard conductors
When the load acts for a long time
Table 4.0.15
When the load acts for a short time
Note: ①The safety factor of the suspension insulator corresponds to the breaking load. If it corresponds to the 1h electromechanical test load, the safety factors should be 4 and 2.5 respectively.
②The safety factor of the hard conductor corresponds to the breaking stress. If it corresponds to the service point stress, the safety factors should be 1.6 and 1.4 respectively.
Article 4.0.16 When calculating the short-circuit dynamic stability, the maximum allowable stress of the hard conductor shall comply with the provisions of Table 4.0.16.
Maximum allowable stress of hard conductors
Conductor materials
Maximum allowable stress (MPa)
Table 4.0.16
LF21 aluminum-manganese alloy tube
The stress calculation of hard conductors in important circuits should also take into account the influence of dynamic effects. Article 4.0.17 The connection between conductors and conductors, and conductors and electrical appliances should have reliable connection joints.
The connection between hard conductors should be welded. Joints and conductors and electrical appliances that need to be disconnected Full text information system of engineering construction standardsArticle 7 When calculating the short-circuit thermal effect of a conductor, the main protection action time plus the corresponding circuit breaker full opening time should be used. When the main protection has a dead zone, the backup protection action time that acts on the dead zone should be used, and the corresponding short-circuit current value should be used.
When calculating electrical appliances, the backup protection action time plus the corresponding circuit breaker full opening time should be used.
Article 4.0.8 For voltage transformer circuits protected by fuses, dynamic stability and thermal stability do not need to be calculated.
Conductors and electrical appliances protected by high-voltage current-limiting fuses can have their dynamic stability and thermal stability calculated based on the characteristics of the current-limiting fuses.
Article 4.0.9 When checking the breaking capacity of the circuit breaker, the short-circuit current of the actual breaking time of the circuit breaker should be used as the verification condition. For circuit breakers equipped with automatic reclosing devices, the influence of reclosing on the rated breaking current should be taken into account.
Article 4.0.10 Circuit breakers used to cut in parallel compensation capacitor groups should be selected with excellent breaking performance.
Article 4.0.11 The normal maximum operating temperature of bare conductors should not be greater than +70°C. When considering the influence of sunlight, the steel core aluminum wire and tubular conductor should not be greater than +80°C. When there is a reliable covering layer of (sugar) tin plating on the contact surface of the bare conductor, its maximum operating temperature can be increased to +85°C.
Article 4.0.12 When calculating the short-circuit thermal stability, the maximum allowable temperature of the bare conductor can be +200°C for hard aluminum and aluminum-manganese alloy, and +300°C for hard copper. The conductor temperature before short circuit should adopt the operating temperature under rated load. Article 4.0.13 When selecting the cross-section of bare conductors according to the normal operating current of the circuit, the long-term allowable current carrying capacity of the conductor shall be corrected according to the altitude and ambient temperature of the area.
The long-term allowable current carrying capacity of bare conductors and their correction factors can be implemented according to Appendix 1 and Appendix 2.
When the conductor adopts a multi-conductor structure, the influence of proximity effect and thermal shielding on the current carrying capacity shall be taken into account.
Article 4.0.14 For 320KV outdoor post insulators and wall bushings of power plants, products with a higher voltage level can be used. Products with a two-level voltage increase can also be used for 3-6KV outdoor post insulators and wall bushings. Article 4.0.15 During normal operation and short circuit, the maximum force of the electrical lead should not be greater than the allowable load of the electrical terminal. The conductors, bushings, insulators and hardware of outdoor power distribution equipment shall be mechanically calculated according to local meteorological conditions and different stress states. Its safety factor shall not be less than that specified in Table 4.0.15. Safety factor of conductors and insulators
Bushing, support insulators and their hardware
Suspension insulators and their hardware
Soft conductor
Hard conductor
When the load acts for a long time
Table 4.0.15
When the load acts for a short time
Note: ①The safety factor of the suspension insulator corresponds to the breaking load. If it corresponds to the 1h electromechanical test load, the safety factor shall be 4 and 2.5 respectively.
②The safety factor of the hard conductor corresponds to the breaking stress. If it corresponds to the service point stress, the safety factor shall be 1.6 and 1.4 respectively.
Article 4.0.16 When calculating the short-circuit dynamic stability, the maximum allowable stress of the hard conductor shall comply with the provisions of Table 4.0.16.
Maximum allowable stress of hard conductors
Conductor materials
Maximum allowable stress (MPa)
Table 4.0.16
LF21 aluminum-manganese alloy tube
The stress calculation of hard conductors in important circuits should also take into account the influence of dynamic effects. Article 4.0.17 The connection between conductors and conductors, and conductors and electrical appliances should have reliable connection joints.
The connection between hard conductors should be welded. Joints and conductors and electrical appliances that need to be disconnected Full text information system of engineering construction standardsArticle 7 When calculating the short-circuit thermal effect of a conductor, the main protection action time plus the corresponding circuit breaker full opening time should be used. When the main protection has a dead zone, the backup protection action time that acts on the dead zone should be used, and the corresponding short-circuit current value should be used.
When calculating electrical appliances, the backup protection action time plus the corresponding circuit breaker full opening time should be used.
Article 4.0.8 For voltage transformer circuits protected by fuses, dynamic stability and thermal stability do not need to be calculated.
Conductors and electrical appliances protected by high-voltage current-limiting fuses can have their dynamic stability and thermal stability calculated based on the characteristics of the current-limiting fuses.
Article 4.0.9 When checking the breaking capacity of the circuit breaker, the short-circuit current of the actual breaking time of the circuit breaker should be used as the verification condition. For circuit breakers equipped with automatic reclosing devices, the influence of reclosing on the rated breaking current should be taken into account.
Article 4.0.10 Circuit breakers used to cut in parallel compensation capacitor groups should be selected with excellent breaking performance.
Article 4.0.11 The normal maximum operating temperature of bare conductors should not be greater than +70°C. When considering the influence of sunlight, the steel core aluminum wire and tubular conductor should not be greater than +80°C. When there is a reliable covering layer of (sugar) tin plating on the contact surface of the bare conductor, its maximum operating temperature can be increased to +85°C.
Article 4.0.12 When calculating the short-circuit thermal stability, the maximum allowable temperature of the bare conductor can be +200°C for hard aluminum and aluminum-manganese alloy, and +300°C for hard copper. The conductor temperature before short circuit should adopt the operating temperature under rated load. Article 4.0.13 When selecting the cross-section of bare conductors according to the normal operating current of the circuit, the long-term allowable current carrying capacity of the conductor shall be corrected according to the altitude and ambient temperature of the area.
The long-term allowable current carrying capacity of bare conductors and their correction factors can be implemented according to Appendix 1 and Appendix 2.
When the conductor adopts a multi-conductor structure, the influence of proximity effect and thermal shielding on the current carrying capacity shall be taken into account.
Article 4.0.14 For 320KV outdoor post insulators and wall bushings of power plants, products with a higher voltage level can be used. Products with a two-level voltage increase can also be used for 3-6KV outdoor post insulators and wall bushings. Article 4.0.15 During normal operation and short circuit, the maximum force of the electrical lead should not be greater than the allowable load of the electrical terminal. The conductors, bushings, insulators and hardware of outdoor power distribution equipment shall be mechanically calculated according to local meteorological conditions and different stress states. Its safety factor shall not be less than that specified in Table 4.0.15. Safety factor of conductors and insulators
Bushing, support insulators and their hardware
Suspension insulators and their hardware
Soft conductor
Hard conductor
When the load acts for a long time
Table 4.0.15
When the load acts for a short time
Note: ①The safety factor of the suspension insulator corresponds to the breaking load. If it corresponds to the 1h electromechanical test load, the safety factor shall be 4 and 2.5 respectively.
②The safety factor of the hard conductor corresponds to the breaking stress. If it corresponds to the service point stress, the safety factor shall be 1.6 and 1.4 respectively.
Article 4.0.16 When calculating the short-circuit dynamic stability, the maximum allowable stress of the hard conductor shall comply with the provisions of Table 4.0.16.
Maximum allowable stress of hard conductors
Conductor materials
Maximum allowable stress (MPa)
Table 4.0.16
LF21 aluminum-manganese alloy tube
The stress calculation of hard conductors in important circuits should also take into account the influence of dynamic effects. Article 4.0.17 The connection between conductors and conductors, and conductors and electrical appliances should have reliable connection joints.
The connection between hard conductors should be welded. Joints and conductors and electrical appliances that need to be disconnected Full text information system of engineering construction standards
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