HG/T 20666-1999 Design code for electrical power in corrosive environments of chemical enterprises (with clause explanation)
Some standard content:
Document of the State Administration of Petroleum and Chemical Industry
State Petrochemical Administration (1999) No. 517
Notice on the approval of 25 chemical industry standards including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes" China Chemical Engineering Survey and Design Association:
The draft of 25 chemical industry standards including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes" submitted by your association for approval has been approved by our bureau and is now published. The name and number of the standard are: Mandatory Standard
Standard Number
HG21594—1999
HG21595-1999
HG21596-1999
HG21597-1999
HG21598-1999
HG21599-1 999
HG21600-1999
HG21601-1999
HG21602—1999
HG21603-1999
HG21604-1999
Recommended standard
HG/T20579.1-1999||tt ||HG/T20579.2—1999
HG/T20579.3-1999
Standard Name
Classification and Technical Conditions of Stainless Steel Manholes and Handholes (Replace HGJ503—86) Normal Pressure Stainless Steel Manhole (Replace HGJ504—86) Rotating Cover Stainless Steel Manhole (Replace HGJ505-86) Rotating Arch Cover Quick Opening Stainless Steel Manhole (Replace HGJ506-86) Horizontal Lifting Cover Stainless Steel Manhole (Replace HGJ507--86) Vertical Lifting Cover Stainless Steel Manhole (Replace HGJ508-86) Elliptical Quick Opening Stainless Steel Manhole (Replace HGJ509-86) Normal Pressure Quick Opening Stainless Steel Handhole (Replace HGJ510-86) Flat Cover Stainless Steel Handhole (Replace HGJ511-86) Rotating Cover Quick Opening Stainless Steel Man ... Stainless steel hand hole (replace HGJ512-86) Rotary handle quick-open stainless steel hand ball (replace HGJ513-86) Process equipment model design regulations (replace CD43A1-86) Process equipment pipeline model quality acceptance standard model design finished product packaging and transportation technical regulations HG/T20661-1999
HG/T20662-1999
HG/T20663-1999
HG/T20664-1999
HG/T20665-1999
HG/T22814-1999
HG/T20666-1999
HG/T20646-1999
HG/T216 29-1999
HG/T20696-1999
Technical conditions for masonry of sulfuric acid boiling furnace
Technical regulations for mechanical conveying design of chemical powder materialsDesign regulations for metering, packaging and stacking systems of chemical powder and granular productsTechnical regulations for power supply design of chemical enterprises (replacing CD90A5-85)Classification standardization of anti-glare defense of chemical buildings and structuresDesign specification for mine shaft and tunnel engineering
Design code for power supply in corrosive environment of chemical enterprises (replacing CD90A6-85)Design regulations for piping materials of chemical plants
Standard drawings of pipe racks (replacing HGJ524-91)
Design regulations for glass fiber reinforced plastic chemical equipment
.The above standards shall be implemented from April 1, 2000, and the replaced standards shall be abolished at the same time. State Administration of Petroleum and Chemical Industry
December 10, 1999
China Chemical Exploration and Design Association
China Chemical Exploration and Design Association [No. 20003023
Notice on Entrusting the Editing, Publishing and Issuing of Chemical Industry Standards National Chemical Engineering Construction Standard Editing Center: The State Administration of Petroleum and Chemical Industry's Notice on Approving 25 Chemical Industry Standards Including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes" (No. Guo Shihua Zhengfa (1999) 517.) approved the 25 chemical industry standards compiled by our association (the approval document is attached). After research, these 25 chemical industry standards are entrusted to your center to be responsible for editing, publishing and issuing. Attachment: Notice on Approving 25 Chemical Industry Standards Including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes". China Chemical Exploration and Design Association
January 31, 2000
Industry Standards of the People's Republic of China
Code of Electrical Design for Chemical Enterprises in Corrosion Environments
r Chemical Enterprises in Corrosion Environments Atmosphereor
HG/T20666-1999
Editor: Sinopec Nanhua Design Institute Approval Department: State Petroleum and Chemical Industry Bureau Implementation Date: April 1, 2000 National Chemical Engineering Construction Standard Editing Center (formerly the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry) 2000 Beijing
This regulation is based on the requirements of the design basic work project (project contract number HDX-9002) issued by the former Ministry of Chemical Industry Electrical Design Technology Center in May 1990, and was revised by Sinopec Nanhua Design Institute on the basis of the original "Technical Regulations for Electrical Design in Corrosive Environments of Chemical Enterprises" (CD90A6-85). This regulation has six chapters, eleven appendices and clause explanations, and its contents include: general principles, terminology, release of chemical corrosive substances, harsh Degree classification and classification of corrosion environments, general regulations, selection of electrical equipment, anti-corrosion measures for distribution lines and lightning protection and grounding devices, etc.
During the revision process, the regulations group conducted extensive investigations and studies, carefully summarized the experience since the implementation of the "Technical Regulations for Electrical Design in Corrosive Environments of Chemical Enterprises", absorbed some scientific research results, and widely solicited opinions from relevant units across the country. Finally, it was reviewed and finalized by the central station.
, During the implementation of this regulation, if any modification or supplement is found, please send your opinions and relevant information to Sinopec Nanhua Design Institute (address: No. 268, Geguan Road, Dachang Town, Nanjing, Postal Code: 210048), and copy it to the National Chemical Electrical Design Technology Center for reference in future revisions. List of the proposing units, chief editors and main drafters of this regulation: Proposing unit: National Chemical Electrical Design Technology Center Station Editor-in-Chief: Sinopec Nanhua Design Institute Main Drafters: Huang Xinhua, Mao Fuxing, Chang Xiuping, Li Yingwei, Chen Hongzhong, Miao Jiguo, Sun Zhencheng, Ren Songbai, Jin Guoren 1
3: Release severity classification of chemical corrosive substances and general provisions for classification of corrosive environments
5. Selection of electrical equipment
6 Anti-corrosion measures for distribution lines, lightning protection and grounding devices Explanation of symbols for applicable environmental categories of anti-corrosion electrical products: Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Corrosion resistance of plastics and rubber
Selection of surface protection treatment methods for steel cable trays Selection of other types of cable trays|| tt||Corrosion resistance of different metal materials
Performance of sealing gasket materials
Uses of corrosion inhibitors and anti-rust greases for metal anti-corrosion oil seals. Performance of anti-corrosion sealing materials
Example of painting scheme for electrical products for corrosive environments Appendix
Appendix K. Example of painting scheme for electrical products for outdoor environments Explanation of terms used in this regulation
Appendix L
Explanation of clauses
(3)）
(24）
(27）
1.0.1 The electrical design of chemical enterprises for indoor or outdoor chemical corrosion environments (hereinafter referred to as corrosion environments) must conscientiously implement the national technical and economic policies, implement the principle of prevention first, take measures according to local conditions, ensure the safety of life and property of the state and the people, and ensure advanced, reliable and economically reasonable technology. This code classifies the corrosive environment of chemical enterprises according to the severity of the release and the relative humidity of the region during the production, processing, storage and transportation of corrosive substances in the corrosive environment, so as to guide the design, correctly select electrical equipment and materials, and propose anti-corrosion measures for power distribution facilities, distribution lines, lightning protection and grounding. 1.0.2 This code is applicable to the power design of the corrosive environment of newly built, rebuilt or expanded chemical enterprises. This code does not apply to the following:
1 Power design of cathodic protection and anodic protection 2 Protection design of underground stray current;
3 Design of electrolytic cells and their accessories.
1.0.3. For the design of power supply in corrosive environment, electrical professionals shall coordinate and cooperate with professionals such as process, equipment, general plan, civil engineering, environmental protection, heating and ventilation, and take comprehensive considerations and the following anti-corrosion measures: 1. Chemical process equipment should be arranged in an open-air or scattered shed style, and equipment that may release corrosive substances should be arranged on the leeward side of the factory's dominant wind direction throughout the year or in summer; 2. Eliminate or reduce the release and accumulation of corrosive substances during the production process; 3. During operation and maintenance, corrosive substances should be confined to closed containers and pipelines to prevent leakage; 4. Select anti-corrosion electrical products according to the type of corrosive environment. 1.0.4 In addition to complying with this regulation, the design of power supply in corrosive environment shall also comply with the provisions of the relevant mandatory standards, specifications and regulations currently in force in the country.
2 Terms
chemical corrosion
2.0.1 "Chemical corrosion
The process in which materials are gradually destroyed or deteriorated under the chemical or electrochemical action of environmental media (such as gas, mist, liquid, dust, soil, etc.) is called chemical corrosion of materials. For example: the phenomenon that electrical equipment, components, members, and parts are damaged or their insulation performance deteriorates under the chemical or electrochemical action of environmental media is called chemical corrosion of electrical facilities. Chemical corrosion is relative to the destruction or deterioration caused by mechanical, physical or microbial action. chemical corrosion atmosphere 2.0.2 Chemical corrosion environment
The place or place where equipment or materials are damaged or deteriorated due to the presence of chemical corrosive substances and moisture in the atmosphere is called a chemical corrosion environment, which can be referred to as a corrosive environment. 2.0.3 Release source of chemical corrosive substances: release source with chemical corrosive medium A specific part where chemical corrosive substances escape or are discharged to form a corrosive environment in the atmosphere or soil is called a chemical corrosive substance release source.
electric Installation seal
2.0.4 Sealing of electrical equipment
In order to avoid the infiltration of chemically corrosive substances, the gaps between the joints of the shell of electrical equipment, the inlet of the shell, and the gaps between the joints of the pipeline are blocked, which is called "sealing" measures. "Electric installation paintcast2.0.5 Coating of electrical equipment
In order to avoid chemical corrosion of the metal shell of electrical facilities and its accessories, the surface of the shell and its accessories (including the inner and outer surfaces) is coated (including painting and spraying powder coating) to isolate the metal from chemically corrosive substances. This practice is called coating.
Weather-protected locations
2.0.6 Weather-protected locations
Weather-protected locations refer to places where direct weather effects can be completely or partially excluded for electrical products. For example: inside a factory building, indoors, under a pavilion (with a roof but no walls or without walls in some directions). Non-weather-protected locations2.0.7 Non-weather-protected locations
Non-weather-protected locations refer to places where there is no protection against weather effects on electrical products. For example: outdoor open-air places or under pipe corridors.
fanti-corrosivedistance
2.0.8 Anti-corrosion distance
The distance between self-contained power stations, main substations, central distribution stations and 35~110kV overhead transmission lines and various types of corrosive environments. 3
Release severity classification of chemical corrosive substances and classification of corrosive environments 3.0.1. The release severity of chemical corrosive substances in corrosive environments is divided into three levels, see Table 3.0.1. 3.0.2 The corrosive environment is divided into three categories, and the main basis for the division is shown in Table 3.0.2. The two bases in the table should be considered at the same time. 3.0.3 When there is a lack of release data for chemical corrosive substances, the environment category can be divided according to the reference basis listed in Table 3.0.3. These bases for qualitative judgments may not be available at the same time. 3.0.4 The classification of corrosive environment categories shall be determined by the electrical profession in accordance with the release concentration of corrosive substances provided by the process profession, combined with the average maximum relative humidity of the wettest month in the region, in coordination with the environmental protection, heating and ventilation professions, etc. at the basic design (preliminary design) stage. The classification results shall be indicated in drawings, tables or texts in the basic design documents. gorT
000/0000
--01X1~*-01XI
0000/000
（%）
（/10
（HND2
(ON）
Gases and their release are
上%98
（）0
General provisions
4.0.1 Self-provided power stations, main substations, central distribution stations, etc. should be located on the upwind side of the factory's dominant wind direction throughout the year or in summer, or on the leeward side of the minimum wind frequency, and should not be located on the leeward side of production equipment with corrosive substances. 4:0.2 Self-provided power stations, main substations, central distribution stations and 35~110kV overhead transmission lines should be far away from the release source of chemical corrosive substances ( Referred to as release source). Its distance from various types of corrosive environments (referred to as anti-corrosion distance) should not be less than the data in Table 4.0.2. Minimum anti-corrosion distance (m) for self-supplied power stations, main substations, central distribution stations, and 35~110kV overhead transmission lines Table 4.0.2 Day
Self-supplied power station
Main substation
Central distribution station
35~110kV overhead transmission lines
Class 1 (medium corrosive environment)
Class 2 (strong corrosive environment)
50~100
Note; The distance from the indoor corrosive environment is measured from the nearest door or window; the outdoor corrosive environment is measured from the release port of the release source. 4.0.3 When the anti-corrosion distance is less than that specified in Table 4.0.2, the following measures should be taken: 1. Indoor layout is adopted;
2. For dust-proof environment, the main transformer is arranged in semi-open air style, and anti-corrosion transformer is selected; 3. The building shape should not be designed as "Ⅱ" shape. 4.0.4. The workshop transformer and substation should not be attached to the factory building of Class 2 corrosive environment. When adjacent to the corrosive environment, it is not advisable to open doors or windows to Class 1 or Class 2 corrosive environment (fixed windows for mining light can be used); if the door must be opened, it is advisable to separate it with a suite or corridor, and use a spring door.
4.0.5. Chemical equipment that may drip should not be installed above the workshop transformer and substation, and it is strictly forbidden for pipelines unrelated to the transformer and substation to pass through the transformer and substation.
4.0.6. The electrical control room in the corrosive factory building should be arranged in a suitable location with good natural ventilation conditions and away from the release source. The electrical control room adjacent to the corrosive plant should be arranged in the upwind direction. 4.0.7 In areas where the average annual precipitation is more than 1000mm or where surface water is easy to accumulate, the indoor floor of the substation or distribution station and control room should be 0.6m higher than the outdoor leveled floor, and the cable trench should be waterproofed. 4.0.8 The cables from the distribution station or control room to the outdoors or corrosive plants should be sealed with anti-corrosion and fireproof at the wall penetration. The gaps in the cable wall protection pipes of the distribution station or control room (including the pipe openings of the reserved or pre-prepared protection pipes) should also be sealed with anti-corrosion and fireproof.
4.0.9 In the main substation and central distribution station in the humid tropical zone, when the environment where the complete set of high-voltage distribution equipment is located is humid and there are no moisture-proof measures, a space heater must be installed in the high-voltage switch cabinet. 4.0.10 The distribution equipment for motors in corrosive environments should be installed in the distribution room in a centralized manner isolated from the site. On-site control electrical appliances and other electrical facilities (such as control boxes, maintenance power boxes, connectors, junction boxes, lamps, etc.) should be installed in accordance with the corrosion environment class 6.2 Chemical corrosive environment
A place or location where equipment or materials are damaged or deteriorated due to the presence of chemical corrosive substances and moisture in the atmosphere is called a chemical corrosive environment, which can be referred to as a corrosive environment. 2.0.3 Release source of chemical corrosive medium: A specific part where the atmosphere or soil forms a corrosive environment due to the escape or discharge of chemical corrosive substances is called a release source of chemical corrosive substances.
electric installation seal
2.0.4 Sealing of electrical equipment
In order to avoid the infiltration of chemical corrosive substances, the gaps in the joints of the shell of the electrical equipment, the shell inlet, and the gaps in the joints of the pipeline are blocked, which is called a "sealing" measure. ”Electric installation paintcast2.0.5Coating of electrical equipment
In order to prevent the metal casing and its accessories of electrical facilities from chemical corrosion, the surface of the casing and its accessories (including the inner and outer surfaces) is coated (which may include painting and spraying powder coating) to isolate the metal from chemical corrosive substances. This practice is called coating.
weather-protected locations
2.0.6Weather-protected locations
Weather-protected locations refer to places where direct climate influences can be completely or partially excluded for electrical products. For example: inside a factory building, indoors, under a pavilion (with a roof but no walls or without walls in some directions). non-weather-protected locations locations2.0.7 Locations without weather protection
Locations without weather protection refer to locations where there is no protection against weather impacts on electrical products. For example: outdoor open-air locations or under pipe corridors.
fanti-corrosivedistance
2.0.8 Anti-corrosion distance
The distance between self-provided power stations, main substations, central distribution stations and 35-110kV overhead transmission lines and various corrosive environments. 3
Release severity classification and corrosion of chemical corrosive substances 3.0.1. The severity of the release of chemical corrosive substances in the corrosive environment is divided into three levels, see Table 3.0.1. 3.0.2 The corrosive environment is divided into three categories. The main basis for the division is shown in Table 3.0.2. The two bases in the table should be considered at the same time. 3.0.3 When there is a lack of data on the release of chemical corrosive substances, the environment category can be divided according to the reference basis listed in Table 3.0.3. These qualitative judgment bases may not be available at the same time. 3.0.4 The classification of the corrosive environment category is determined by the electrical profession based on the release concentration of corrosive substances provided by the process and other professions, combined with The average maximum relative humidity of the wettest month in the region shall be jointly agreed upon by environmental protection, heating and ventilation and other professionals during the basic design (preliminary design) stage. The division results shall be indicated in drawings, tables or text in the basic design documents. gorT
000/0000
--01X1~*-01XI
0000/000
（%）
（/10
（HND2
(ON）
Gases and their release are
on %98
（）0
General Provisions
4.0.1 Self-provided power stations, main substations, central distribution stations, etc. should be located on the upwind side of the factory's dominant wind direction throughout the year or in summer, or on the downwind side of the minimum wind frequency, and should not be located on the downwind side of production equipment with corrosive substances. 4:0.2 Self-provided power stations, main substations, central distribution stations and 35~110kV overhead transmission lines should be far away from the release source of chemical corrosive substances (referred to as the release source). The distance between them and various corrosive environments (referred to as the anti-corrosion distance) should not be less than the data in Table 4.0.2. Minimum anti-corrosion distance (m) for self-supplied power station, main substation, central distribution station, 35~110kV overhead transmission line Table 4.0.2 day
Self-supplied power station
Main substation
Central distribution station
35~110kV overhead transmission line
Class 1 (medium corrosion environment)
Class 2 (strong corrosion environment)
50~100
Note; The distance from the indoor corrosion environment is calculated from the nearest door or window; the outdoor corrosion environment is calculated from the release port of the release source. 4.0.3 When the anti-corrosion distance is less than that specified in Table 4.0.2, the following measures should be taken: 1 Adopt indoor layout;
2 For dust-proof environment, the main transformer layout adopts semi-open-air type, and anti-corrosion transformer is selected; 3 The building shape should not be designed as "Ⅱ" shape. 4.0.4. The workshop transformer and distribution station should not be attached to the factory building with Class 2 corrosive environment. When adjacent to the corrosive environment, it is not advisable to open doors or windows (fixed windows for mining light) to the Class 1 or Class 2 corrosive environment; if it is necessary to open the door, it is advisable to separate it with a suite or corridor, and use a spring door.
4.0.5 Chemical equipment that may drip should not be installed above the workshop transformer and distribution station, and it is strictly forbidden to pass through the transformer and distribution station without pipelines related to the transformer and distribution station.
4.0.6 The electrical control room in the corrosive factory building should be arranged in a suitable location with good natural ventilation conditions and away from the release source. For the electrical control room adjacent to the corrosive factory building, it should be arranged in the upwind direction. 4.0.7 In areas with an average annual precipitation of more than 1000mm or where surface water is easy to accumulate, the indoor floor of the transformer or distribution station and control room should be 0.6m higher than the outdoor leveled floor, and the cable trench should be waterproofed. 4.0.8 The cables from the substation or control room to the outdoors or corrosive workshops shall be sealed with anti-corrosion and fireproof seals at the wall penetration. The gaps in the cable wall protection pipes of the substation or control room (including the reserved or pre-prepared pipe openings) shall also be sealed with anti-corrosion and fireproof seals.
4.0.9 In the main substation and central substation in the humid tropical region, when the environment of the complete set of high-voltage distribution equipment is humid and there are no moisture-proof measures, a space heater must be installed in the high-voltage switch cabinet. 4.0.10 The distribution equipment for motors in corrosive environments should be isolated from the site and installed in the distribution room. On-site control electrical appliances and other electrical facilities (such as control boxes, maintenance power boxes, connectors, junction boxes, lamps, etc.) should be installed according to the corrosive environment class 62 Chemical corrosive environment
A place or location where equipment or materials are damaged or deteriorated due to the presence of chemical corrosive substances and moisture in the atmosphere is called a chemical corrosive environment, which can be referred to as a corrosive environment. 2.0.3 Release source of chemical corrosive medium: A specific part where the atmosphere or soil forms a corrosive environment due to the escape or discharge of chemical corrosive substances is called a release source of chemical corrosive substances.
electric installation seal
2.0.4 Sealing of electrical equipment
In order to avoid the infiltration of chemical corrosive substances, the gaps in the joints of the shell of the electrical equipment, the shell inlet, and the gaps in the joints of the pipeline are blocked, which is called a "sealing" measure. ”Electric installation paintcast2.0.5Coating of electrical equipment
In order to prevent the metal casing and its accessories of electrical facilities from chemical corrosion, the surface of the casing and its accessories (including the inner and outer surfaces) is coated (which may include painting and spraying powder coating) to isolate the metal from chemical corrosive substances. This practice is called coating.
weather-protected locations
2.0.6Weather-protected locations
Weather-protected locations refer to places where direct climate influences can be completely or partially excluded for electrical products. For example: inside a factory building, indoors, under a pavilion (with a roof but no walls or without walls in some directions). non-weather-protected locations locations2.0.7 Locations without weather protection
Locations without weather protection refer to locations where there is no protection against weather impacts on electrical products. For example: outdoor open-air locations or under pipe corridors.
fanti-corrosivedistance
2.0.8 Anti-corrosion distance
The distance between self-provided power stations, main substations, central distribution stations and 35-110kV overhead transmission lines and various corrosive environments. 3
Release severity classification and corrosion of chemical corrosive substances 3.0.1. The severity of the release of chemical corrosive substances in the corrosive environment is divided into three levels, see Table 3.0.1. 3.0.2 The corrosive environment is divided into three categories. The main basis for the division is shown in Table 3.0.2. The two bases in the table should be considered at the same time. 3.0.3 When there is a lack of data on the release of chemical corrosive substances, the environment category can be divided according to the reference basis listed in Table 3.0.3. These qualitative judgment bases may not be available at the same time. 3.0.4 The classification of the corrosive environment category is determined by the electrical profession based on the release concentration of corrosive substances provided by the process and other professions, combined with The average maximum relative humidity of the wettest month in the region shall be jointly agreed upon by environmental protection, heating and ventilation and other professionals during the basic design (preliminary design) stage. The division results shall be indicated in drawings, tables or text in the basic design documents. gorT
000/0000
--01X1~*-01XI
0000/000
（%）
（/10
（HND2
(ON）
Gases and their release are
on %98
（）0
General Provisions
4.0.1 Self-provided power stations, main substations, central distribution stations, etc. should be located on the upwind side of the factory's dominant wind direction throughout the year or in summer, or on the downwind side of the minimum wind frequency, and should not be located on the downwind side of production equipment with corrosive substances. 4:0.2 Self-provided power stations, main substations, central distribution stations and 35~110kV overhead transmission lines should be far away from the release source of chemical corrosive substances (referred to as the release source). The distance between them and various corrosive environments (referred to as the anti-corrosion distance) should not be less than the data in Table 4.0.2. Minimum anti-corrosion distance (m) for self-supplied power station, main substation, central distribution station, 35~110kV overhead transmission line Table 4.0.2 day
Self-supplied power station
Main substation
Central distribution station
35~110kV overhead transmission line
Class 1 (medium corrosion environment)
Class 2 (strong corrosion environment)
50~100
Note; The distance from the indoor corrosion environment is calculated from the nearest door or window; the outdoor corrosion environment is calculated from the release port of the release source. 4.0.3 When the anti-corrosion distance is less than that specified in Table 4.0.2, the following measures should be taken: 1 Adopt indoor layout;
2 For dust-proof environment, the main transformer layout adopts semi-open-air type, and anti-corrosion transformer is selected; 3 The building shape should not be designed as "Ⅱ" shape. 4.0.4. The workshop transformer and distribution station should not be attached to the factory building with Class 2 corrosive environment. When adjacent to the corrosive environment, it is not advisable to open doors or windows (fixed windows for mining light) to the Class 1 or Class 2 corrosive environment; if it is necessary to open the door, it is advisable to separate it with a suite or corridor, and use a spring door.
4.0.5 Chemical equipment that may drip should not be installed above the workshop transformer and distribution station, and it is strictly forbidden to pass through the transformer and distribution station without pipelines related to the transformer and distribution station.
4.0.6 The electrical control room in the corrosive factory building should be arranged in a suitable location with good natural ventilation conditions and away from the release source. For the electrical control room adjacent to the corrosive factory building, it should be arranged in the upwind direction. 4.0.7 In areas with an average annual precipitation of more than 1000mm or where surface water is easy to accumulate, the indoor floor of the transformer or distribution station and control room should be 0.6m higher than the outdoor leveled floor, and the cable trench should be waterproofed. 4.0.8 The cables from the substation or control room to the outdoors or corrosive workshops shall be sealed with anti-corrosion and fireproof seals at the wall penetration. The gaps in the cable wall protection pipes of the substation or control room (including the reserved or pre-prepared pipe openings) shall also be sealed with anti-corrosion and fireproof seals.
4.0.9 In the main substation and central substation in the humid tropical region, when the environment of the complete set of high-voltage distribution equipment is humid and there are no moisture-proof measures, a space heater must be installed in the high-voltage switch cabinet. 4.0.10 The distribution equipment for motors in corrosive environments should be isolated from the site and installed in the distribution room. On-site control electrical appliances and other electrical facilities (such as control boxes, maintenance power boxes, connectors, junction boxes, lamps, etc.) should be installed according to the corrosive environment class 64 The classification of the corrosive environment category shall be determined by the electrical profession according to the release concentration of corrosive substances provided by the process profession, combined with the average maximum relative humidity of the wettest month in the region, in coordination with the environmental protection, heating and ventilation and other professions in the basic design (preliminary design) stage. The classification results shall be indicated in drawings, tables or texts in the basic design documents. gorTwwW.bzxz.Net
000/0000
--01X1~*-01XI
0000/000
（%）
（/10
（HND2
(ON）
Gases and their release are
上%98
（）0
General provisions
4.0.1 Self-provided power stations, main substations, central distribution stations, etc. should be located on the upwind side of the factory's dominant wind direction throughout the year or in summer, or on the leeward side of the minimum wind frequency, and should not be located on the leeward side of production equipment with corrosive substances. 4:0.2 Self-provided power stations, main substations, central distribution stations and 35~110kV overhead transmission lines should be far away from the release source of chemical corrosive substances ( Referred to as release source). Its distance from various types of corrosive environments (referred to as anti-corrosion distance) should not be less than the data in Table 4.0.2. Minimum anti-corrosion distance (m) for self-supplied power stations, main substations, central distribution stations, and 35~110kV overhead transmission lines Table 4.0.2 Day
Self-supplied power station
Main substation
Central distribution station
35~110kV overhead transmission lines
Class 1 (medium corrosive environment)
Class 2 (strong corrosive environment)
50~100
Note; The distance from the indoor corrosive environment is measured from the nearest door or window; the outdoor corrosive environment is measured from the release port of the release source. 4.0.3 When the anti-corrosion distance is less than that specified in Table 4.0.2, the following measures should be taken: 1. Indoor layout is adopted;
2. For dust-proof environment, the main transformer is arranged in semi-open air style, and anti-corrosion transformer is selected; 3. The building shape should not be designed as "Ⅱ" shape. 4.0.4. The workshop transformer and substation should not be attached to the factory building of Class 2 corrosive environment. When adjacent to the corrosive environment, it is not advisable to open doors or windows to Class 1 or Class 2 corrosive environment (fixed windows for mining light can be used); if the door must be opened, it is advisable to separate it with a suite or corridor, and use a spring door.
4.0.5. Chemical equipment that may drip should not be installed above the workshop transformer and substation, and it is strictly forbidden for pipelines unrelated to the transformer and substation to pass through the transformer and substation.
4.0.6. The electrical control room in the corrosive factory building should be arranged in a suitable location with good natural ventilation conditions and away from the release source. The electrical control room adjacent to the corrosive plant should be arranged in the upwind direction. 4.0.7 In areas where the average annual precipitation is more than 1000mm or where surface water is easy to accumulate, the indoor floor of the substation or distribution station and control room should be 0.6m higher than the outdoor leveled floor, and the cable trench should be waterproofed. 4.0.8 The cables from the distribution station or control room to the outdoors or corrosive plants should be sealed with anti-corrosion and fireproof at the wall penetration. The gaps in the cable wall protection pipes of the distribution station or control room (including the pipe openings of the reserved or pre-prepared protection pipes) should also be sealed with anti-corrosion and fireproof.
4.0.9 In the main substation and central distribution station in the humid tropical zone, when the environment where the complete set of high-voltage distribution equipment is located is humid and there are no moisture-proof measures, a space heater must be installed in the high-voltage switch cabinet. 4.0.10 The distribution equipment for motors in corrosive environments should be installed in the distribution room in a centralized manner isolated from the site. On-site control electrical appliances and other electrical facilities (such as control boxes, maintenance power boxes, connectors, junction boxes, lamps, etc.) should be installed in accordance with the corrosion environment class 6.4 The classification of the corrosive environment category shall be determined by the electrical profession according to the release concentration of corrosive substances provided by the process profession, combined with the average maximum relative humidity of the wettest month in the region, in coordination with the environmental protection, heating and ventilation and other professions in the basic design (preliminary design) stage. The classification results shall be indicated in drawings, tables or texts in the basic design documents. gorT
000/0000
--01X1~*-01XI
0000/000
（%）
（/10
（HND2
(ON）
Gases and their release are
上%98
（）0
General provisions
4.0.1 Self-provided power stations, main substations, central distribution stations, etc. should be located on the upwind side of the factory's dominant wind direction throughout the year or in summer, or on the leeward side of the minimum wind frequency, and should not be located on the leeward side of production equipment with corrosive substances. 4:0.2 Self-provided power stations, main substations, central distribution stations and 35~110kV overhead transmission lines should be far away from the release source of chemical corrosive substances ( Referred to as release source). Its distance from various types of corrosive environments (referred to as anti-corrosion distance) should not be less than the data in Table 4.0.2. Minimum anti-corrosion distance (m) for self-supplied power stations, main substations, central distribution stations, and 35~110kV overhead transmission lines Table 4.0.2 Day
Self-supplied power station
Main substation
Central distribution station
35~110kV overhead transmission lines
Class 1 (medium corrosive environment)
Class 2 (strong corrosive environment)
50~100
Note; The distance from the indoor corrosive environment is measured from the nearest door or window; the outdoor corrosive environment is measured from the release port of the release source. 4.0.3 When the anti-corrosion distance is less than that specified in Table 4.0.2, the following measures should be taken: 1. Indoor layout is adopted;
2. For dust-proof environment, the main transformer is arranged in semi-open air style, and anti-corrosion transformer is selected; 3. The building shape should not be designed as "Ⅱ" shape. 4.0.4. The workshop transformer and distribution station should not be attached to the factory building of Class 2 corrosive environment. When adjacent to the corrosive environment, it is not advisable to open doors or windows to Class 1 or Class 2 corrosive environment (fixed windows for mining light can be used); if the door must be opened, it is advisable to separate it with a suite or corridor, and use a spring door.
4.0.5. Chemical equipment that may drip should not be installed above the workshop transformer and distribution station, and it is strictly forbidden for pipelines unrelated to the transformer and distribution station to pass through the transformer and distribution station.
4.0.6. The electrical control room in the corrosive factory building should be arranged in a suitable location with good natural ventilation conditions and away from the release source. The electrical control room adjacent to the corrosive plant should be arranged in the upwind direction. 4.0.7 In areas where the average annual precipitation is more than 1000mm or where surface water is easy to accumulate, the indoor floor of the substation or distribution station and control room should be 0.6m higher than the outdoor leveled floor, and the cable trench should be waterproofed. 4.0.8 The cables from the distribution station or control room to the outdoors or corrosive plants should be sealed with anti-corrosion and fireproof at the wall penetration. The gaps in the cable wall protection pipes of the distribution station or control room (including the pipe openings of the reserved or pre-prepared protection pipes) should also be sealed with anti-corrosion and fireproof.
4.0.9 In the main substation and central distribution station in the humid tropical zone, when the environment where the complete set of high-voltage distribution equipment is located is humid and there are no moisture-proof measures, a space heater must be installed in the high-voltage switch cabinet. 4.0.10 The distribution equipment for motors in corrosive environments should be installed in the distribution room in a centralized manner isolated from the site. On-site control electrical appliances and other electrical facilities (such as control boxes, maintenance power boxes, connectors, junction boxes, lamps, etc.) should be installed in accordance with the corrosion environment class 6.
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