GBJ 149-1990 Specification for construction and acceptance of busbar installations in electrical installation projects
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Electrical Installation Engineering
Busbar Installation Construction and Acceptance Specification
GBJ149—90
1991 Beijing
Engineering Construction Standard Full-text Information System
W Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Electrical Installation EngineeringbZxz.net
Busbar Installation Construction and Acceptance Specification
GBJ149—90
Editor Department: Former Ministry of Water Resources and Electric Power of the People's Republic of China Approval Department: Ministry of Construction of the People's Republic of China Implementation Date: October 1, 1991
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full Text Information System
Notice on the Release of Three National Standards, including the "Construction and Acceptance Specifications for High Voltage Electrical Equipment in Electrical Installation Engineering"
(90) Jianbiaozi No. 698
According to the requirements of the former State Planning Commission's Document No. [1986] 2630, the three standards, including the "Construction and Acceptance Specifications for High Voltage Electrical Equipment in Electrical Installation Engineering" revised by the former Ministry of Water Resources and Electric Power, have been reviewed by relevant departments. The "Construction and Acceptance Specifications for High Voltage Electrical Equipment in Electrical Installation Engineering" GBJ147-90: "Construction and Acceptance Specifications for Power Transformers, Oil-immersed Reactors, and Transformers in Electrical Installation Engineering" GBJ148-90; and "Construction and Acceptance Specifications for Busbar Installations in Electrical Installation Engineering" GBJ149-90 are now approved as national standards. They will be implemented on October 1, 1991. The high-voltage electrical appliances, power transformers, mutual inductors, and busbar devices in the former national standard "Electrical Installation Engineering Construction and Acceptance Specification" GBJ232
-82 are abolished at the same time.
The three specifications are managed by the Ministry of Energy, and the specific interpretation and other work are the responsibility of the Ministry of Energy's Electric Power Construction Research Institute. The publication and distribution is organized by the Ministry of Construction's Standards and Norms Research Institute.
Ministry of Construction of the People's Republic of China
December 30, 1990
Engineering Construction Standards Full-text Information System
W. Engineering Construction Standards Full-text Information System
Revision Notes
This specification is edited by the former Ministry of Water Resources and Electric Power in accordance with the requirements of the former State Planning Commission's Document No. 2630 [1986], and is specifically compiled by the Ministry of Energy's Electric Power Construction Research Institute in conjunction with relevant units.
During the revision process, the specification group conducted extensive investigations and studies, 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 four chapters and one appendix. The main contents of this revision are: 1. The scope of application is expanded to a voltage of 500kV; 2. The relevant contents of aluminum alloy tubular busbars and enclosed busbars are supplemented; 3. In coordination with the current national standards, the safety clearance of indoor and outdoor distribution devices has been revised;
4. The quality inspection of the lap joint surface of the rigid busbar bolt fastening connection has cancelled the backward method of using a feeler gauge for inspection that has been used for many years, and it is stipulated that the bolts should be tightened with a torque wrench, emphasizing the processing quality requirements of the contact surface;
5. It is clearly stipulated that the "neutral vaseline" that has been used for many years should be replaced by "electric composite grease" with better performance,
6. Some construction methods and construction processes that ensure construction quality have been affirmed, and some relatively backward construction methods and construction processes have been eliminated accordingly, such as: the bending of hard busbars should be cold bending instead of hot bending, and the welding of aluminum and aluminum alloy busbars should be argon arc welding, and oxygen welding and carbon arc welding should not be used; 7. The connection between soft busbars and wire clamps should be hydraulically crimped or bolted, and the construction process of explosive crimping is not recommended in power plant booster stations or substations; 8. Partial modification and supplement of other relevant provisions. If any imperfections are found during the implementation of this specification, please send your opinions and relevant information to the Electric Power Construction Research Institute of the Ministry of Energy (Beijing Liangxiang, Postal Code: 102401) for reference in future revisions.
Ministry of Energy
December 1989
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1
Chapter 2
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 3
Chapter 4
Appendix I
Busbar installation
General provisions
Hard busbar processing
Hard busbar installation
Hard busbar welding
Soft busbar erection
Insulators and wall bushings
Project handover and acceptance
Explanation of terms used in this specification
Additional instructions
Engineering construction standard full text information system
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c000c00000000000000000000000000c0060660006c06 Engineering Construction Standard Full Text Information System
Chapter I General Provisions
Article 1.0.1 This specification is formulated to ensure the installation quality of busbar devices such as hard busbars, soft busbars, insulators, hardware, wall bushings, etc., promote the advancement of installation technology, and ensure the safe operation of equipment.
Article 1.0.2 This specification applies to the construction and acceptance of busbar device installation projects of 500kV and below.
Article 1.0.3 The installation of busbar devices shall be carried out in accordance with the approved design. Article 1.0.4 The transportation and storage of equipment and instruments shall comply with the requirements of this specification. When there are special requirements for the product, they shall also comply with the requirements of the product. Article 1.0.5 The storage period of equipment and instruments before installation shall be one year or less. When long-term storage is required, it shall comply with the special provisions for the storage of equipment and instruments.
Article 1.0.6 The equipment and instruments used shall comply with the provisions of the current national technical standards and shall have qualification certificates. The equipment shall have a nameplate. Article 1.0.7 After the equipment and instruments arrive at the site, the following acceptance inspections shall be carried out in a timely manner:
1. The packaging and sealing shall be in good condition.
2. Unpacking inspection and inventory, the specifications shall meet the design requirements, and the accessories and spare parts shall be complete.
3. The technical documents of the product shall be complete.
4. Make an appearance inspection in accordance with the requirements of this specification. Article 1.0.8 The safety and technical measures during construction shall comply with the provisions of this specification and the current relevant safety and technical standards and the technical documents of the product. For important processes, safety and technical measures shall be formulated in advance.
Article 1.0.9 Construction works related to busbar installation shall comply with the following requirements:
W.1
Engineering Construction Standard Full Text Information System
1. The quality of buildings and structures related to busbar installation shall comply with the relevant provisions of the current national construction and acceptance specifications. When there are special requirements for design and equipment, they shall also meet their requirements. 2. Before installing the busbar device, the construction project shall meet the following conditions: 1. The foundation and frame shall meet the design requirements of the electrical equipment; 2. The construction of the roof and floor slabs is completed and there shall be no leakage; 3. The indoor ground base is completed and the leveling elevation is marked on the wall; 4. The foundation and frame have reached the strength allowed for installation, the quality of the welded components meets the requirements, and the walkway boards, railings and platforms of the high-rise frame are complete and firm; 5. All decoration projects that may damage the installed busbar device or cannot be carried out after installation are completed;
6. The doors and windows are installed and the construction roads are unobstructed; 7. The reserved holes and embedded iron parts of the busbar device should meet the design requirements. 3. Before the busbar device is installed and put into operation, the construction project shall meet the following requirements:
1. The pre-processing, opening, and expansion and other decoration projects are completed: 2. The protective mesh doors, railings and all facilities that are isolated from the power receiving part are complete,
3. The work that cannot be carried out after power is received and affects the safety of operation is completed; 4. The construction facilities should be dismantled and the site should be cleaned. Article 1.0.10 The fasteners used for busbar installation, except for anchor bolts, shall be galvanized products that meet national standards, and fasteners used outdoors shall be hot-dip galvanized products.
Article 1.0.11 The porcelain parts of insulators and wall bushings shall comply with the current national standard "Technical Conditions for High Voltage Insulator Porcelain Parts" and the relevant technical conditions for electric porcelain products. Article 1.0.12 In addition to complying with the provisions of this specification, the construction and acceptance of busbar installations shall also comply with the provisions of the current relevant national standards and specifications. Engineering Construction Standards Full Text Information System
W.Engineering Construction Standard Full Text Information System
Chapter 2
Busbar Installation
Section 1 General Provisions
Article 2.1.1 Equipment and instruments used in busbar installations should be packaged to prevent corrosion by corrosive gases and mechanical damage during transportation and storage. Article 2.1.2 When copper, aluminum busbars, and aluminum alloy tube busbars do not have factory qualification certificates or incomplete information, or when there is doubt about the material, they should be inspected according to the requirements of Table 2.1.2.
Mechanical properties and resistivity of busbar
Busbar name
Copper busbar
Aluminum busbar
Aluminum alloy tube busbar
Busbar model
Minimum tensile strength
(N/mm2)
Minimum elongation
Maximum resistivity at 20℃
(Qmm2/m)
Article 2.1.3 The surface of the busbar should be smooth and flat, and there should be no cracks, wrinkles, inclusions, deformation and distortion.
Article 2.1.4 The sections of the enclosed busbar and plug-in busbar duct supplied as a set should be clearly marked, with complete accessories, no deformation of the outer shell, and no damage inside. The overlapping surface of the busbar fixed with bolts should be flat, and its silver-plated layer should not have pockmarks, peeling and uncovered parts.
Article 2.1.5 The installation screw holes of various metal components shall not be cut by gas welding or blown by electric welding.
Engineering Construction Standard Full Text Information System
W3
Engineering Construction Standard Full Text Information System
Article 2.1.6 The anti-corrosion treatment of metal components and busbars shall meet the following requirements: 1. The rust removal of metal components shall be thorough, and the anti-corrosion paint shall be evenly applied and firmly bonded, without defects such as peeling and wrinkling;
2. The busbar shall be painted evenly without defects such as peeling and wrinkling; 3. In places with salt spray, relative humidity of air close to 100% and corrosive gases, outdoor metal components shall be hot-dip galvanized; 4. In places with salt spray and corrosive gases, the busbar shall be coated with anti-corrosion paint.
Article 2.1.7 Non-electric metal components such as the base of the support insulator, the flange of the bushing, and the protective net (cover) shall be grounded in accordance with the provisions of the current national standard "Construction and Acceptance Specifications for Grounding Devices of Electrical Installation Engineering". The grounding wires should be arranged neatly and in the same direction.
Article 2.1.8 When the busbars are overlapped with the busbars, the busbars with the branch lines, and the busbars with the electrical wiring terminals, the treatment of the overlapped surfaces shall comply with the following provisions: 1. Copper and copper: Outdoor, hot and humid, or indoor with corrosive gases to the busbars, must be tinned, and can be directly connected in dry rooms. 2. Aluminum and aluminum: Direct connection.
3. Steel and steel: Must be tinned or galvanized, and must not be directly connected. 4. Copper and aluminum: In dry rooms, copper conductors should be tinned, and copper-aluminum transition plates should be used outdoors or indoors where the relative air temperature is close to 100%, and the copper ends should be tinned. 5. Steel and copper or aluminum: The steel overlap surface must be tinned. 6. The lap joints of the bolted fixed joints of the closed busbar should be silver-plated. Article 2.1.9 The phase sequence of the busbar should comply with the following provisions when there is no regulation in the design:
, The AC busbars arranged up and down are arranged as A, B, and C phases from top to bottom, and the positive pole of the DC busbar is at the top and the negative pole is at the bottom. 3. The AC busbars arranged horizontally are arranged as A, B, and C phases from the back of the disk to the disk surface, with the positive pole of the DC busbar at the back and the negative pole at the front. 3. The AC busbars of the downlead are arranged as A, B, and C phases from left to right, with the positive pole of the DC busbar at the left and the negative pole at the right.
Article 2.1.10 The color of the busbar paint should comply with the following provisions: 1. Three-phase AC busbar: Phase A is yellow, Phase B is green, and Phase C is red. The single-phase AC busbar has the same color as the lead-out phase. 2. DC busbar: The positive pole is ochre and the negative pole is blue. 3. DC balancing busbar and AC neutral busbar: The ungrounded ones are purple, and the grounded ones are purple with black stripes. 4. Enclosed busbar: The outer surface of the busbar and the inner surface of the shell are painted with matte black paint, and the outer surface of the shell is painted with light-colored paint.
Article 2.1.11 The busbar shall be painted with phase-color paint in accordance with the following requirements: 1. Outdoor soft busbars and enclosed busbars shall be painted with phase-color paint at both ends and appropriate parts in the middle.
2. All surfaces of single-piece busbars and all visible surfaces of multi-piece, trough-shaped, and tubular busbars shall be painted with phase-color paint.
3. All surfaces of steel busbars shall be painted with anti-corrosion phase-color paint. 4. The paint shall be applied evenly, without defects such as delamination and wrinkling, and shall be neat and consistent. Article 2.1.12 The busbar shall not be painted with phase color paint at the following locations: 1. The bolt connection and support connection of the busbar, the connection between the busbar and electrical appliances, and the place within 10mm from all connections. 2. The length of the unpainted part of the contact surface for the portable grounding wire connection shall be the width or diameter of the busbar, and shall not be less than 50mm, and a black marking tape with a width of 10mm shall be painted on both sides.
Article 2.1.13 When installing the busbar, the safe clearance of indoor and outdoor power distribution devices shall comply with the provisions of Table 2.1.13-1 and Table 2.1.13-2. When the voltage value exceeds the voltage of this level, the safe clearance shall adopt the safe clearance value specified for the higher voltage level. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
1. Between live parts and grounded parts
Safety clearance of indoor power distribution equipment (mm) Drawing No.
2. Between the live parts above the mesh and plate-like fences extending upward at a height of 2.3m from the ground
1. Between live parts of different phases
2. Between live parts on both sides of the break of circuit breakers and disconnectors 1. Between the fence and live parts
2. Between crossed live parts without fences that are not shut down for maintenance at the same time
Between mesh fences and live parts
Between bare conductors without fences and the ground (floor) Between parallel bare conductors without fences that are not shut down for maintenance at the same time The bushing leading to the outdoors to the road surface of the outdoor passage 6
2.1.13—1
2. 1.13-1
2.1.13—
Table 2.1.13-1
1015203560110
5150 180300 550850
125150180300550900
900|930 105013001600
250280 400650
52425 2480|260028503150
519501980|2100 2350
365040004000
40004000|4000|40004500
110J, 220J refers to the neutral point directly grounded power grid: when the mesh fence to the live part is a plate fence, its B value can be A: +30mm; 950
From the outdoor outlet bushing to the road surface of the outdoor passage, when the outside of the outlet bushing is an outdoor distribution device, its distance to the outdoor ground should not be less than the C value of the outdoor part listed in Table 2.1.13-2
When the altitude exceeds 1000m, the A value should be corrected according to Figure 2.1.13-6. The values listed in this table are not applicable to the manufacturing and production of complete sets of distribution devices. Engineering Construction Standard Full Text Information System6. The anti-corrosion treatment of metal components and busbars shall meet the following requirements: 1. The rust removal of metal components shall be thorough, and the anti-corrosion paint shall be evenly applied and firmly bonded, without defects such as peeling and wrinkling;
2. The busbar shall be painted evenly without defects such as peeling and wrinkling; 3. In places with salt spray, relative humidity of air close to 100% and corrosive gases, outdoor metal components shall be hot-dip galvanized; 4. In places with salt spray and corrosive gases, the busbar shall be coated with anti-corrosion paint.
Article 2.1.7 Non-electric metal components such as the base of the support insulator, the flange of the bushing, and the protective net (cover) shall be grounded in accordance with the provisions of the current national standard "Construction and Acceptance Specifications for Grounding Devices of Electrical Installation Engineering". The grounding wires should be arranged neatly and in the same direction.
Article 2.1.8 When busbars are overlapped with busbars, busbars with branch lines, or busbars with electrical wiring terminals, the treatment of the overlapped surfaces shall comply with the following provisions: 1. Copper and copper: Outdoors, in hot and humid rooms or rooms with corrosive gases to the busbars, they must be tinned. They can be directly connected in dry rooms. 2. Aluminum and aluminum: Direct connection.
3. Steel and steel: They must be tinned or galvanized, and direct connection is not allowed. 4. Copper and aluminum: In dry rooms, copper conductors should be tinned. Outdoors or rooms with relative air temperature close to 100%, copper-aluminum transition plates should be used, and the copper ends should be tinned. 5. Steel and copper or aluminum: The steel overlapped surface must be tinned. 6. The overlapped surface of the closed busbar bolts should be silver-plated. Article 2.1.9 The phase sequence of the busbars shall comply with the following provisions when there is no regulation in the design:
1. The AC busbars arranged up and down are arranged as A, B, and C phases from top to bottom, and the positive pole of the DC busbar is at the top and the negative pole is at the bottom. 2. The AC busbars arranged horizontally are arranged as A, B, and C phases from the back of the panel to the panel surface, and the positive pole of the DC busbar is at the back and the negative pole is at the front. 3. The AC busbars of the downlead are arranged as A, B, and C phases from left to right, and the positive pole of the DC busbar is on the left and the negative pole is on the right.
Article 2.1.10 The color of the busbar paint shall comply with the following provisions: 1. Three-phase AC busbar: Phase A is yellow, Phase B is green, and Phase C is red. The color of the single-phase AC busbar is the same as the lead-out phase. 2. DC busbar: The positive pole is ochre and the negative pole is blue. 3. DC balanced busbar and AC neutral busbar: purple for ungrounded ones, purple with black stripes for grounded ones. 4. Enclosed busbar: matte black paint is applied to the outer surface of the busbar and the inner surface of the shell, and light-colored paint is applied to the outer surface of the shell.
Article 2.1.11 The phase-color paint of busbars shall meet the following requirements: 1. Outdoor soft busbars and enclosed busbars shall be painted with phase-color paint at both ends and appropriate parts in the middle.
2. All surfaces of single-piece busbars and all visible surfaces of multi-piece, trough-shaped, and tubular busbars shall be painted with phase-color paint.
3. All surfaces of steel busbars shall be painted with anti-corrosion phase-color paint. 4. The paint shall be applied evenly, without defects such as peeling and wrinkling, and shall be neat and consistent. Article 2.1.12 The following places of busbars shall not be painted with phase-color paint: 1. The bolted and supported connections of the busbars, the connections between the busbars and electrical appliances, and the places within 10mm from all connections. 2. On the contact surface for portable grounding wire connection, the length of the unpainted part shall be the width or diameter of the busbar and shall not be less than 50mm, and a black marking tape with a width of 10mm shall be painted on both sides.
Article 2.1.13 When installing the busbar, the safe clearance of indoor and outdoor power distribution devices shall comply with the provisions of Table 2.1.13-1 and Table 2.1.13-2. When the voltage value exceeds the voltage of this level, the safe clearance shall adopt the safe clearance value specified for the higher voltage level. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
1. Between live parts and grounded parts
Safety clearance of indoor power distribution equipment (mm) Drawing No.
2. Between the live parts above the mesh and plate-like fences extending upward at a height of 2.3m from the ground
1. Between live parts of different phases
2. Between live parts on both sides of the break of circuit breakers and disconnectors 1. Between the fence and live parts
2. Between crossed live parts without fences that are not shut down for maintenance at the same time
Between mesh fences and live parts
Between bare conductors without fences and the ground (floor) Between parallel bare conductors without fences that are not shut down for maintenance at the same time The bushing leading to the outdoors to the road surface of the outdoor passage 6
2.1.13—1
2. 1.13-1
2.1.13—
Table 2.1.13-1
1015203560110
5150 180300 550850
125150180300550900
900|930 105013001600
250280 400650
52425 2480|260028503150
519501980|2100 2350
365040004000
40004000|4000|40004500
110J, 220J refers to the neutral point directly grounded power grid: when the mesh fence to the live part is a plate fence, its B value can be A: +30mm; 950
From the outdoor outlet bushing to the road surface of the outdoor passage, when the outside of the outlet bushing is an outdoor distribution device, its distance to the outdoor ground should not be less than the C value of the outdoor part listed in Table 2.1.13-2
When the altitude exceeds 1000m, the A value should be corrected according to Figure 2.1.13-6. The values listed in this table are not applicable to the manufacturing and production of complete sets of distribution devices. Engineering Construction Standard Full Text Information System6. The anti-corrosion treatment of metal components and busbars shall meet the following requirements: 1. The rust removal of metal components shall be thorough, and the anti-corrosion paint shall be evenly applied and firmly bonded, without defects such as peeling and wrinkling;
2. The busbar shall be painted evenly without defects such as peeling and wrinkling; 3. In places with salt spray, relative humidity of air close to 100% and corrosive gases, outdoor metal components shall be hot-dip galvanized; 4. In places with salt spray and corrosive gases, the busbar shall be coated with anti-corrosion paint.
Article 2.1.7 Non-electric metal components such as the base of the support insulator, the flange of the bushing, and the protective net (cover) shall be grounded in accordance with the provisions of the current national standard "Construction and Acceptance Specifications for Grounding Devices of Electrical Installation Engineering". The grounding wires should be arranged neatly and in the same direction.
Article 2.1.8 When busbars are overlapped with busbars, busbars with branch lines, or busbars with electrical wiring terminals, the treatment of the overlapped surfaces shall comply with the following provisions: 1. Copper and copper: Outdoors, in hot and humid rooms or rooms with corrosive gases to the busbars, they must be tinned. They can be directly connected in dry rooms. 2. Aluminum and aluminum: Direct connection.
3. Steel and steel: They must be tinned or galvanized, and direct connection is not allowed. 4. Copper and aluminum: In dry rooms, copper conductors should be tinned. Outdoors or rooms with relative air temperature close to 100%, copper-aluminum transition plates should be used, and the copper ends should be tinned. 5. Steel and copper or aluminum: The steel overlapped surface must be tinned. 6. The overlapped surface of the closed busbar bolts should be silver-plated. Article 2.1.9 The phase sequence of the busbars shall comply with the following provisions when there is no regulation in the design:
1. The AC busbars arranged up and down are arranged as A, B, and C phases from top to bottom, and the positive pole of the DC busbar is at the top and the negative pole is at the bottom. 2. The AC busbars arranged horizontally are arranged as A, B, and C phases from the back of the panel to the panel surface, and the positive pole of the DC busbar is at the back and the negative pole is at the front. 3. The AC busbars of the downlead are arranged as A, B, and C phases from left to right, and the positive pole of the DC busbar is on the left and the negative pole is on the right.
Article 2.1.10 The color of the busbar paint shall comply with the following provisions: 1. Three-phase AC busbar: Phase A is yellow, Phase B is green, and Phase C is red. The color of the single-phase AC busbar is the same as the lead-out phase. 2. DC busbar: The positive pole is ochre and the negative pole is blue. 3. DC balanced busbar and AC neutral busbar: purple for ungrounded ones, purple with black stripes for grounded ones. 4. Enclosed busbar: matte black paint is applied to the outer surface of the busbar and the inner surface of the shell, and light-colored paint is applied to the outer surface of the shell.
Article 2.1.11 The phase-color paint of busbars shall meet the following requirements: 1. Outdoor soft busbars and enclosed busbars shall be painted with phase-color paint at both ends and appropriate parts in the middle.
2. All surfaces of single-piece busbars and all visible surfaces of multi-piece, trough-shaped, and tubular busbars shall be painted with phase-color paint.
3. All surfaces of steel busbars shall be painted with anti-corrosion phase-color paint. 4. The paint shall be applied evenly, without defects such as peeling and wrinkling, and shall be neat and consistent. Article 2.1.12 The following places of busbars shall not be painted with phase-color paint: 1. The bolted and supported connections of the busbars, the connections between the busbars and electrical appliances, and the places within 10mm from all connections. 2. On the contact surface for portable grounding wire connection, the length of the unpainted part shall be the width or diameter of the busbar and shall not be less than 50mm, and a black marking tape with a width of 10mm shall be painted on both sides.
Article 2.1.13 When installing the busbar, the safe clearance of indoor and outdoor power distribution devices shall comply with the provisions of Table 2.1.13-1 and Table 2.1.13-2. When the voltage value exceeds the voltage of this level, the safe clearance shall adopt the safe clearance value specified for the higher voltage level. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
1. Between live parts and grounded parts
Safety clearance of indoor power distribution equipment (mm) Drawing No.
2. Between the live parts above the mesh and plate-like fences extending upward at a height of 2.3m from the ground
1. Between live parts of different phases
2. Between live parts on both sides of the break of circuit breakers and disconnectors 1. Between the fence and live parts
2. Between crossed live parts without fences that are not shut down for maintenance at the same time
Between mesh fences and live parts
Between bare conductors without fences and the ground (floor) Between parallel bare conductors without fences that are not shut down for maintenance at the same time The bushing leading to the outdoors to the road surface of the outdoor passage 6
2.1.13—1
2. 1.13-1
2.1.13—
Table 2.1.13-1
1015203560110
5150 180300 550850
125150180300550900
900|930 105013001600
250280 400650
52425 2480|260028503150
519501980|2100 2350
365040004000
40004000|4000|40004500
110J, 220J refers to the neutral point directly grounded power grid: when the mesh fence to the live part is a plate fence, its B value can be A: +30mm; 950
From the outdoor outlet bushing to the road surface of the outdoor passage, when the outside of the outlet bushing is an outdoor distribution device, its distance to the outdoor ground should not be less than the C value of the outdoor part listed in Table 2.1.13-2
When the altitude exceeds 1000m, the A value should be corrected according to Figure 2.1.13-6. The values listed in this table are not applicable to the manufacturing and production of complete sets of distribution devices. Engineering Construction Standard Full Text Information System12 Busbars should not be painted with phase color paint at the following locations: 1. Bolt connections and support connections of busbars, connections between busbars and electrical appliances, and places within 10mm of all connections. 2. The length of the unpainted portion of the contact surface for portable grounding wire connection should be the width or diameter of the busbar, and should not be less than 50mm, and a black marking tape with a width of 10mm should be painted on both sides.
Article 2.1.13 When installing busbars, the safe clearance distance of indoor and outdoor power distribution devices should comply with the provisions of Table 2.1.13-1 and Table 2.1.13-2. When the voltage value exceeds the voltage of this level, the safe clearance distance should adopt the safe clearance distance specified for the higher voltage level. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
1. Between live parts and grounded parts
Safety clearance of indoor power distribution equipment (mm) Drawing No.
2. Between the live parts above the mesh and plate-like fences extending upward at a height of 2.3m from the ground
1. Between live parts of different phases
2. Between live parts on both sides of the break of circuit breakers and disconnectors 1. Between the fence and live parts
2. Between crossed live parts without fences that are not shut down for maintenance at the same time
Between mesh fences and live parts
Between bare conductors without fences and the ground (floor) Between parallel bare conductors without fences that are not shut down for maintenance at the same time The bushing leading to the outdoors to the road surface of the outdoor passage 6
2.1.13—1
2. 1.13-1
2.1.13—
Table 2.1.13-1
1015203560110
5150 180300 550850
125150180300550900
900|930 105013001600
250280 400650
52425 2480|260028503150
519501980|2100 2350
365040004000
40004000|4000|40004500
110J, 220J refers to the neutral point directly grounded power grid: when the mesh fence to the live part is a plate fence, its B value can be A: +30mm; 950
From the outdoor outlet bushing to the road surface of the outdoor passage, when the outside of the outlet bushing is an outdoor distribution device, its distance to the outdoor ground should not be less than the C value of the outdoor part listed in Table 2.1.13-2
When the altitude exceeds 1000m, the A value should be corrected according to Figure 2.1.13-6. The values listed in this table are not applicable to the manufacturing and production of complete sets of distribution devices. Engineering Construction Standard Full Text Information System12 Busbars should not be painted with phase color paint at the following locations: 1. Bolt connections and support connections of busbars, connections between busbars and electrical appliances, and places within 10mm of all connections. 2. The length of the unpainted portion of the contact surface for portable grounding wire connection should be the width or diameter of the busbar, and should not be less than 50mm, and a black marking tape with a width of 10mm should be painted on both sides.
Article 2.1.13 When installing busbars, the safe clearance distance of indoor and outdoor power distribution devices should comply with the provisions of Table 2.1.13-1 and Table 2.1.13-2. When the voltage value exceeds the voltage of this level, the safe clearance distance should adopt the safe clearance distance specified for the higher voltage level. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
1. Between live parts and grounded parts
Safety clearance of indoor power distribution equipment (mm) Drawing No.
2. Between the live parts above the mesh and plate-like fences extending upward at a height of 2.3m from the ground
1. Between live parts of different phases
2. Between live parts on both sides of the break of circuit breakers and disconnectors 1. Between the fence and live parts
2. Between crossed live parts without fences that are not shut down for maintenance at the same time
Between mesh fences and live parts
Between bare conductors without fences and the ground (floor) Between parallel bare conductors without fences that are not shut down for maintenance at the same time The bushing leading to the outdoors to the road surface of the outdoor passage 6
2.1.13—1
2. 1.13-1
2.1.13—
Table 2.1.13-1
1015203560110
5150 180300 550850
125150180300550900
900|930 105013001600
250280 400650
52425 2480|260028503150
519501980|2100 2350
365040004000
40004000|4000|40004500
110J, 220J refers to the neutral point directly grounded power grid: when the mesh fence to the live part is a plate fence, its B value can be A: +30mm; 950
From the outdoor outlet bushing to the road surface of the outdoor passage, when the outside of the outlet bushing is an outdoor distribution device, its distance to the outdoor ground should not be less than the C value of the outdoor part listed in Table 2.1.13-2
When the altitude exceeds 1000m, the A value should be corrected according to Figure 2.1.13-6. The values listed in this table are not applicable to the manufacturing and production of complete sets of distribution devices. Engineering Construction Standard Full Text Information System
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