Machinery installation requirement for fiber-optical communication equipment of statuionary ground
Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL5850
SJ20048-—92
Mechanical and electrical installation of optical fiber communication equipment
Technical requirements
Performance requirement for machineryelectrification installation of fiber-opticalcommunication equipment
Published on February 1, 1992
China Electronics Industry Corporation
Implementation on May 1, 1992
Military Standard of the Electronic Industry of the People's Republic of China Technical requirements for machineryelectrification installation of optical fiber communication equipment Mechanical installation requirements for stationary ground optical fiber communication equipment Performance requirementformachineryelectrificationinstallationofiber-opticalcommunicationequipmentMachinery installation requirement for Fiber-opticalcommunication equipment of stationary ground1 Subject content and scope of application
This standard specifies the basic technical requirements for the mechanical installation of stationary ground optical fiber communication equipment. This standard applies to the mechanical installation of stationary ground optical fiber communication equipment. 2 Reference standards
SJ20048—92
SJ20049 Technical requirements for mechanical and electrical installation of optical fiber communication equipment Requirements for electrical installation of ground-fixed optical fiber communication equipment.
3 Terminology
3.1 Optical fiber distribution frame
An optical fiber connection frame used to connect or connect distribution optical fiber and jumper optical fiber to optical transmission unit and optical receiving unit, usually with one jumper per optical fiber.
3.2 Wireway
A channel specially used to lay and protect optical cables, cables, and wires. 3.3 Cabinet
An independent, self-contained housing for electronic equipment used alone or in conjunction with other equipment. 3.4 Row spacing
The distance between a row of cabinets and the row of cabinets in front or behind it. 3.5 Maintenance channel
The distance between the row end and the wall, or between the racks (cabinets) at the left and right ends of a double row arrangement. According to their use requirements, they are divided into two types: main and secondary channels.
4 General requirements
4.1 The installation should ensure that the installed optical fiber communication equipment (hereinafter referred to as equipment) is consistent with the construction drawings, installation drawings and process documents.
SJ20048--92
issued by China Electronics Industry Corporation on February 1, 1992 and implemented on May 1, 1992. Changes and replacements of materials, parts and processes used must be approved through the prescribed procedures. 4.2 All materials, parts and purchased parts submitted for installation should have factory qualification certificates and should comply with the requirements of current standards and design documents.
4.3 The installation operation method should be determined according to the requirements of the equipment product standards. During the installation process, any damage to the installed parts should be avoided and their performance should not be reduced.
4.4 The structure that requires complete fixation should be firmly assembled, and no skew, swing, shake, rotation, displacement, etc. are allowed. 4.5 For structures that are required to be detachable, they should be easy to disassemble after installation and should not be completely fixed. 4.6 Parts with locking and positioning devices should be locked freely after installation and adjustment. All kinds of gaskets should be close to the assembly parts, and no wrinkles or breaks are allowed. 4.7
After installation, no residual metal chips and other debris are allowed. 4.8
5 Outdoor installation
51 The outdoor installation form of equipment can be divided into overhead installation, ground installation and underground entry hole installation. 5.2 The installation should be concealed and camouflaged, and no light should leak out. 5.3 The installation should be compact and leave appropriate space for easy maintenance. 5.4 The support body of the overhead equipment should fully consider its supporting force, and the structure should be stable and firm. 5.5 During installation, the protection conditions of the equipment such as rainproof, moisture-proof, mildew-proof, and rodent-proof should be fully considered according to the installation environment, and the thermal design and antifreeze facilities of the equipment should work normally. 5.6 The lightning protection requirements shall be in accordance with Article 8.4 of SJ20049. 6 Computer room
6.1 General requirements
6.1.1 The net height, effective area, ground load, location of cable and optical cable access holes, location and size of doors and windows, interior decoration, temperature, humidity and lighting of the computer room should be determined according to the technical requirements of the equipment for the computer room. 6.1.2 The ceiling, walls, doors, windows, floors, etc. of the computer room should be able to prevent dust and sand from intruding, and the roof should strictly prevent rain leakage and dust falling. 6.1.3 The computer room should have a special building or a part of the building should be separated to form an independent unit. The computer room should meet the second-level fire protection standard.
6.1.4 If the computer room is in the same building as the oil engine generator room, other factory buildings, office buildings, etc., sound insulation measures should be taken as appropriate.
6.1.5 The seismic resistance of the computer room should be considered according to the highest seismic intensity level of the unit. 6.1.6 The grounding requirements shall be in accordance with Article 8.2 of SJ20049 and the equipment product standards. 6.1.7 The floor of the computer room shall be flat, with an allowable deviation of no more than 2mm per 1000mm in any direction, and the maximum deviation of the entire computer room floor shall be no more than 30mm.
6.1.8 Unless otherwise specified, the ratio of natural lighting area to floor area of a newly built computer room is generally 1:6, and artificial lighting is used in underground or semi-underground computer rooms.
6.1.9 No part of the computer room is allowed to be used as a passage to enter a room other than the computer room. 6.2 Computer room environment
6.2.1 General requirements
When the temperature and relative humidity of the computer room cannot meet the requirements of the equipment product standards, the computer room should be heated or air-conditioned. 6.2.2 Heating
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6.2.2.1 Areas that meet the following conditions should have heating measures: The number of days with daily average temperature equal to or lower than 5℃ is more than 60 days on average over the years: a.
The number of days with daily average temperature equal to or lower than 5℃ is 45 to 60 days on average over the years, and the average relative humidity in January is equal to or greater than 75% and the average sunshine rate in winter is equal to or lower than 25%. 6.2.2.2 When centralized heating is used, the temperature of the computer room should not be lower than 16℃. 6.2.3 Air conditioning
6.2.3.1 Air conditioning includes heating and cooling with air conditioners. 6.2.3.2 When air conditioning is used, the temperature of the computer room should be adjusted between 16 and 30℃, and the relative humidity should be lower than 60%. 6.2.4 Fire Fighting
6.2.4.1 The following fire extinguishing agents are recommended: a.
Carbon dioxide;
Difluoromonochloromonobromomethane (1211"). 6.2.4.2 Fire extinguishing agents prohibited from use in the machine room: a.
Foam;
b.Dry powder.
7 Equipment Layout
7.1 General Requirements
7.1.1 The equipment layout should be convenient for maintenance and construction, with emphasis on the convenience and safety of maintenance work. , strive for coordination and beauty.
7.1.2 Reasonably save housing area and installation materials (such as cables, optical cables, iron frames, etc.). 7.1.3 Suitable for current installation requirements, taking into account future development needs. 7.2 Column racks
7.2.1 The height and span of the column racks should be determined according to the requirements of the equipment product standards. 7.2.2 The arrangement of the column racks should meet the requirements of the column spacing and maintenance channels. 7.3 Column spacing
7.3.1 When adjacent machine rows are arranged face to face, the column spacing should be 1300~1500 7.3.2 When adjacent machine rows are arranged back to back, the row spacing should be 700-800mm; when arranged back to back, the row spacing between adjacent machine rows shall comply with the provisions of 7.3.1. 7.3.3 When adjacent machine rows are arranged face to back, the row spacing should be 1000-1200mm. 7.3.4 The distance between the machine row face and the wall should be no less than 1000mm; the distance between the back and the wall should be no less than 800mm. In a double row arrangement, the row spacing on the left and right sides should be as close as possible. 7.4 Maintenance channel
Main The width of the main channel should be 1300~1400mm, and the width of the secondary channel should be 800~900mm. 7.5 Relative position
7.5.1 The optical terminal should be as close to the optical fiber distribution frame as possible. 7.5.2 The upper and lower level machines should be close to each other. Try to avoid the cross-column optical cable (cable) crossing the rack. All racks with cross-column cables should be arranged in adjacent positions and in the same row as much as possible. 8 Chassis, cabinets, racks
8.1 General requirements
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8.1.1 Appropriate space should be left outside the ventilation holes and windows of the equipment, and protective measures should be taken according to the requirements of the equipment product standards when necessary. When using the ground trench for ventilation, the trench should be clean and the ventilation channel should be unobstructed. 8.1.2 Equipment in the machine room with a seismic design intensity of 7 degrees or above should be seismically reinforced. The racks and frames should meet the following requirements when they are fixed:
Connecting irons and side tie irons should not be reinforced on brick walls, and they must be reinforced with room columns: a.
Racks, cabinets, columns and the ground must be reinforced, and bolts should be used to reinforce the upper beams, or other effective measures that have passed the test should be used. b.
8.2 Chassis
The chassis can be placed freely or fixed on the installation surface as needed. 8.2.1
The installation of the chassis inside the cabinet should follow the following principles: Heavy chassis should be installed at the bottom of the cabinet;
Chassis with high heat generation should be installed on both sides or above the cabinet: c.
Chassis that are sensitive to electromagnetic interference should be kept at a distance. 8.2.3 When several smaller chassis are assembled according to a certain chassis specification space, buffer sheets such as rubber should be placed between the chassis. 8.2.4 After the chassis is fixedly installed, it should be ensured that there is no displacement or jitter under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference plane after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-in boxes can be inserted flexibly, and the fastening device is reliable. 8.4 Rack
The recommended values of the verticality of the installed strip rack to the bottom reference plane and the parallelism tolerance between racks are shown in Table 2.8.4.1
Rack height mm
Tolerance value m
8.4.2 Requirements Racks with fixed bases or installed on column racks should be installed firmly. 8.4.3 After the rack is installed, the plug-ins and plug-ins should be inserted flexibly and the fastening device should be reliable. 9 Fiber optic patch panels and wiring ducts
9.1 General requirements
Fiber optic patch panels and wiring ducts should be coordinated with the equipment and allow optical cables, cables and wires to take the shortest route. 9.2 Fiber optic patch panels
, 9.2.1 The color of the fiber optic patch panel should be consistent with the parallel equipment. The installation form and appearance of the patch panel should be as consistent as possible with the parallel equipment.
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9.2.2 The patch panel should be stable and firm after installation. If necessary, a shock-absorbing device should be installed. 9.3 Wire Trough
9.3.1 The shortest route should be selected for the installation of the wire trough, and the vertical and horizontal directions should be perpendicular to each other. The corners should at least accommodate the minimum bending radius of the optical cable used.
9.3.2 The top wire trough can be installed close to or away from the top of the equipment. When the wire trough is installed close to the top of the equipment, the height of the equipment should not be less than 2000mm; when the wire trough is installed away from the top of the equipment, if the height of the equipment is not more than 2000mm, the distance should be 100mm. If the height of the equipment is less than 2000mm, the height of the wire trough from the ground should not be less than 2000mm. 9.3.3 The width of the top wire trough should be consistent with the width of the rack and fixed relative to the wall, rack, roof or ground. 10 Removable connection
10.1 Threaded connection
10.1.1 Anti-loosening measures should be taken for tightening screws and nuts. When spring washers are used, the tightening degree shall be based on the flattening of the cut of the spring washers. It is not allowed to directly pad spring washers on parts with long holes or brittle materials (such as paper-coated boards, porcelain parts, etc.). 10.1.2 When tightening parts, they should be carried out symmetrically and cross-step to avoid deformation of components and poor contact. 10.1.3 The length of the end of the screw or bolt protruding from the nut shall generally not be greater than the diameter of the screw or bolt and shall not be less than two pitches. The effective length of the screw and bolt connection shall generally not be less than 3 pitches. 10.1.4 After the countersunk screw is tightened, its head shall remain flat with the surface of the fastened part, and it is allowed to be slightly lower than the surface of the part. Screws smaller than M4 shall not be lower than the surface of the part by 0.3mm, and screws larger than M5 shall not be lower than the surface of the part by 0.5mm. 10.2 Pin connection
10.2.1 The positioning and fixing of the pin should be carried out after the relevant parts are adjusted appropriately. The protruding or sinking length of the two end faces of the cylindrical pin and the conical pin after assembly should be roughly symmetrical. The length of the protruding surface of the conical pin shall not exceed the diameter of the small end. 10.2.2 After the cotter pin is assembled, the end opening angle should be greater than 90.11 Non-detachable connection
11.1 Riveting
11.1.1 When riveting, it should be carried out symmetrically and crosswise in steps. After riveting, the rivet rod should not be loose. 11.1.2 When riveting semicircular head and cylindrical head rivets, the rivet head should be completely flat on the riveted part, and the riveted end should be consistent with the shape of the rivet pot. No depression, notch and obvious cracking are allowed. When the rivet end is required to be flat with the surface of the part, it is allowed to be leveled. 11.1.3 When riveting countersunk rivets, it should be kept flat with the riveted surface, and a slight depression is allowed. The rivet head shall not be more than 0.2mm below the surface of the part. The countersunk rivet with a diameter greater than 4mm shall not be more than 0.4mm below the surface of the part. 11.1.4 For hollow rivet riveting, there shall be no more than three cracks on the riveted edge, and the depth of the cracks shall not exceed 1/2 of the riveted edge. 11.1.5 For riveted nuts and other parts that need to be expanded, the rivet shall not crack, damage the thread or cause looseness after expansion. Punching, chiseling and wire recovery are allowed when necessary.
11.1.6 The surface of the riveted parts around the rivet head (within the range of d + 5mm, d is the rivet diameter) is allowed to have a slight depression, the depth of which shall not exceed 1/5 of the minimum thickness of the riveted parts, but the number of rivets with such defects shall not exceed 30% of the total number of rivets. 11.1.7 After riveting, appropriate remedial measures should be taken at the damaged coating. 11.2 Welding
11.2.1 Before welding, the weldment should be cleaned, and after welding, impurities such as welding slag, flux and oxide scale should be removed. 11.2.2 The welding process should be carried out in a symmetrical and cross-sequence to avoid harmful deformation. 11.2.3 The welding should be firm and without false welding. The weld should be continuous, uniform and smooth, without defects such as leakage, cracks, slag inclusions and material burn-through. 5
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When there are defects such as slag inclusions and pores in the weld, repair welding is allowed. 11.3 Bonding
Bonding should be based on the use conditions of the equipment, and the adhesive should be correctly selected and prepared. Bonding should be carried out according to the process specifications, and there should be no adhesive on the non-bonding surface.
Transmission mechanism
The transmission mechanism should be flexible, precise, smooth, and well meshed, without sticking, stringing, jumping and other phenomena. 12.2 The guide parts (guide rails, sliders, guide posts, etc.) should ensure smooth movement in the forward and reverse directions without jamming, stagnation, jumping, etc. 12.3 The two sprockets should be installed on the same plane, and the deviation value should be less than 0.2% of the center distance between the two sprockets. 13 Inspection and acceptance
13.1 Inspection
After the equipment is installed, the following items should be inspected: a.
Whether all required technical documents are complete; whether all fixed parts are firm and reliable: b.
Whether all moving parts are flexible;
Whether all fastening devices are positioned and reliable; e
Whether obstacles to ventilation and heat dissipation parts are eliminated; whether all protective facilities are complete and installed correctly. 13.2 Acceptance
Acceptance shall comply with the following provisions:
Acceptance shall be carried out after commissioning is completed and the equipment has been put into operation for one week: the installer shall submit relevant information to the user; the user and the installer shall carry out the acceptance in accordance with the provisions of this standard and the equipment product standard; if any parts that do not meet the requirements are found, the responsible party shall be responsible for taking measures to solve them; the user and the installer shall sign for the acceptance. SJ20048-—92
Appendix A
Maximum dimensions of ground optical fiber communication equipment
(reference)
This appendix is for reference when installing ground optical fiber communication equipment. Cabinet-type equipment
Maximum height: generally not more than 2600mm; maximum width:--generally not more than 1000mm; maximum depth: generally not more than 600mm.
A2 rack-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm.
A3 console table equipment
Height of table from ground: 750~800mm;
Width of legroom under table: not less than 450mm; Height of legroom under table from ground: not less than 600mm; Maximum height of equipment: generally not more than 1300mm. Additional remarks:
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard is drafted by the 34th Institute of the Ministry of Machinery and Electronics Industry and China Electronics Technology Standardization Institute. The main drafters of this standard are Shi Liangliu, Mo Jinwen and Wang Ping. Project code: B93020.2 Equipment in computer rooms with a seismic design intensity of 7 degrees or above should be seismically reinforced. The following requirements should be met when fixing racks and columns:
Connecting irons and side tie irons should not be reinforced on brick walls, and must be reinforced with room columns: a.
Racks, cabinets, columns and the ground must be reinforced, and bolts should be used to reinforce the upper beams, or other effective measures that have passed the test should be used. b.
8.2 Chassis
The chassis can be placed freely or fixed on the installation surface as needed. 8.2.1
The installation of the chassis inside the cabinet should follow the following principles: Heavy chassis are installed at the bottom of the cabinet;
Chassis with high heat generation are installed on both sides or above the cabinet: c.
Chassis that are sensitive to electromagnetic interference should be kept away. 8.2.3 When several smaller chassis are assembled according to a certain chassis specification space, buffer sheets such as rubber should be placed between the chassis. 8.2.4 After the chassis is fixedly installed, it should be ensured that there is no displacement or shaking under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference plane after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-ins can be inserted flexibly, and the tightening device is reliable. 8.4 Rack
The recommended values of the verticality tolerance of the installed strip rack to the bottom reference plane and the parallelism tolerance between the racks are shown in Table 2.8.4.1
Rack height mm
Tolerance value m
8.4.2 Racks that require the base to be fixed or installed on the column rack should be installed firmly. 8.4.3 After the rack is installed, the plug-in and plug-in box should be inserted flexibly and the fastening device should be reliable. 9 Fiber Optic Distribution Frame and Wireway
9.1 General requirements
Fiber optic distribution frame and wireway should be coordinated with the equipment and make the optical cables, cables and wires take the shortest route. 9.2 Fiber Optic Distribution Frame
, 9.2.1 The color of the fiber optic distribution frame should be consistent with the parallel equipment. The installation form and appearance of the distribution frame should be as consistent as possible with the parallel equipment.
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9.2.2 After the distribution frame is installed, it should be stable and firm. If necessary, a shock-absorbing device should be provided. 9.3 Wireway
9.3.1 The shortest route should be selected for the installation of the wireway, and the vertical and horizontal directions should be perpendicular to each other. The corners should at least accommodate the minimum bending radius of the optical cable used.
9.3.2 The top wireway can be installed close to or away from the top of the equipment. When the wiring trough is installed close to the top of the equipment, the height of the equipment should not be less than 2000mm; when the wiring trough is installed away from the top of the equipment, if the height of the equipment is not more than 2000mm, the distance should be 100mm; if the height of the equipment is less than 2000mm, the height of the wiring trough from the ground should not be less than 2000mm. 9.3.3 The width of the top wiring trough should be consistent with the width of the rack and fixed relatively to the wall, rack, roof or ground. 10 Removable connection
10.1 Threaded connection
10.1.1 Anti-loosening measures should be taken for tightening screws and nuts. When spring washers are used, the tightening degree shall be based on the flattening of the cut of the spring washer. It is not allowed to directly pad spring washers on parts with long holes or brittle materials (such as paper board, porcelain parts, etc.). 10.1.2 When tightening parts, they should be done symmetrically and cross-step to avoid deformation of components and poor contact. 10.1.3 The length of the end of the screw or bolt protruding from the nut shall generally not be greater than the diameter of the screw or bolt and shall not be less than two pitches. The effective length of the screw or bolt connection shall generally not be less than 3 pitches. 10.1.4 After the countersunk screw is tightened, its head shall remain flat with the surface of the fastened part and may be slightly lower than the surface of the part. Screws smaller than M4 shall not be lower than the surface of the part by 0.3mm, and screws larger than M5 shall not be lower than the surface of the part by 0.5mm. 10.2 Pin connection
10.2.1 The positioning and fixing of the pin shall be carried out after the relevant parts are adjusted appropriately. The protruding or sinking length of the two end faces of the cylindrical pin and the conical pin after assembly shall be roughly uniform. The length of the protruding surface of the conical pin shall not exceed the diameter of the small end. 10.2.2 After the cotter pin is assembled, the end opening angle shall be greater than 90.11 Non-detachable connection
11.1 Riveting
11.1.1 When riveting, it should be carried out symmetrically and step by step. After riveting, the rivet rod should not be loose. 11.1.2 When riveting semi-circular head and cylindrical head rivets, the rivet head should be completely flat on the riveted part, and the riveted end should be consistent with the shape of the rivet pot. No depression, notch or obvious cracking is allowed. When the rivet end is required to be flat with the surface of the part, it is allowed to be flattened. 11.1.3 When riveting with countersunk rivets, it should be kept flat with the riveted surface, and a slight depression is allowed. The rivet head shall not be more than 0.2mm below the surface of the part. The countersunk rivet with a diameter greater than 4mm shall not be more than 0.4mm below the surface of the part. 11.1.4 When riveting with hollow rivets, there shall be no more than three cracks on the riveted edge, and the depth of the cracks shall not exceed 1/2 of the riveted edge. 11.1.5 For parts that need to be expanded, such as riveted nuts, the rivet shall not crack, damage the thread or cause looseness after expansion. Punching, chiseling and thread recovery are allowed when necessary.
11.1.6 The surface of the riveted parts around the rivet head (within the range of d + 5mm, d is the rivet diameter) is allowed to have a slight depression, the depth of which shall not exceed 1/5 of the minimum thickness of the riveted parts, but the number of rivets with such defects shall not exceed 30% of the total number of rivets. 11.1.7 After riveting, appropriate remedial measures should be taken at the damaged coating. 11.2 Welding
11.2.1 The weldment should be cleaned before welding, and impurities such as welding slag, flux and oxide scale should be removed after welding. 11.2.2 The welding process should be carried out in a symmetrical and cross-sequence to avoid harmful deformation. 11.2.3 The welding should be firm and free of false welding. The weld should be continuous, uniform and smooth, without defects such as leaking welding, cracks, slag inclusions and material burn-through. 5
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When there are defects such as slag inclusions and pores in the weld, repair welding is allowed. 11.3 Bonding
Bonding should be done according to the use conditions of the equipment, and the adhesive should be correctly selected and prepared. Bonding should be carried out according to the process specifications, and there should be no adhesive on the non-bonding surface.
Transmission mechanism
The transmission mechanism should be flexible, precise, smooth, and well meshed, without sticking, stringing, jumping, etc. 12.2 The guide parts (guide rails, sliders, guide pillars, etc.) should ensure smooth movement in the forward and reverse directions without sticking, stagnation, jumping, etc. 12.3 The two sprockets should be installed on the same plane, and the deviation value should be less than 0.2% of the center distance between the two sprockets. 13 Inspection and Acceptance
13.1 Inspection
After the equipment is installed, the following items should be inspected: a.
Whether all required technical documents are complete; whether all fixed parts are firm and reliable; b.
Whether all moving parts are flexible;
Whether all fastening devices are positioned and reliable; e
Whether obstacles to ventilation and heat dissipation parts are removed; whether all protective facilities are complete and correctly installed. 13.2 Acceptance
Acceptance should comply with the following provisions:
Acceptance should be carried out after commissioning is completed and one week of operation: The installer should submit relevant information to the user; The user and the installer shall conduct the acceptance in accordance with the provisions of this standard and the equipment product standard; If any parts that do not meet the requirements are found, the responsible party shall be responsible for taking measures to solve them; The user and the installer shall sign for qualified acceptance. SJ20048--92
Appendix A
Maximum dimensions of ground optical fiber communication equipment
(reference)
This appendix is for reference when installing ground optical fiber communication equipment. Cabinet-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm; maximum depth: generally not more than 600mm.
A2 Rack-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm.
A3 Console-type equipment
Height of table from ground: 750~800mm;
Width of legroom under table: not less than 450mm; Height of legroom under table from ground: not less than 600mm; Maximum height of equipment: generally not more than 1300mm. Additional Notes:
This standard was proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 34th Institute of the Ministry of Machinery and Electronics Industry and China Electronics Technology Standardization Institute. The main drafters of this standard are Shi Liangliu, Mo Jinwen and Wang Ping. Project code: B93020.2 Equipment in computer rooms with a seismic design intensity of 7 degrees or above should be seismically reinforced. The following requirements should be met when fixing racks and columns:
Connecting irons and side tie irons should not be reinforced on brick walls, and must be reinforced with room columns: a.
Racks, cabinets, columns and the ground must be reinforced, and bolts should be used to reinforce the upper beams, or other effective measures that have passed the test should be used. b.
8.2 Chassis
The chassis can be placed freely or fixed on the installation surface as needed. 8.2.1
The installation of the chassis inside the cabinet should follow the following principles: Heavy chassis are installed at the bottom of the cabinet;
Chassis with high heat generation are installed on both sides or above the cabinet: c.
Chassis that are sensitive to electromagnetic interference should be kept away. 8.2.3 When several smaller chassis are assembled according to a certain chassis specification space, buffer sheets such as rubber should be placed between the chassis. 8.2.4 After the chassis is fixedly installed, it should be ensured that there is no displacement or shaking under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference plane after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-ins can be inserted flexibly, and the tightening device is reliable. 8.4 Rack
The recommended values of the verticality tolerance of the installed strip rack to the bottom reference plane and the parallelism tolerance between the racks are shown in Table 2.8.4.1
Rack height mm
Tolerance value m
8.4.2 Racks that require the base to be fixed or installed on the column rack should be installed firmly. 8.4.3 After the rack is installed, the plug-in and plug-in box should be inserted flexibly and the fastening device should be reliable. 9 Fiber Optic Distribution Frame and Wireway
9.1 General requirements
Fiber optic distribution frame and wireway should be coordinated with the equipment and make the optical cables, cables and wires take the shortest route. 9.2 Fiber Optic Distribution Frame
, 9.2.1 The color of the fiber optic distribution frame should be consistent with the parallel equipment. The installation form and appearance of the distribution frame should be as consistent as possible with the parallel equipment.
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9.2.2 After the distribution frame is installed, it should be stable and firm. If necessary, a shock-absorbing device should be provided. 9.3 Wireway
9.3.1 The shortest route should be selected for the installation of the wireway, and the vertical and horizontal directions should be perpendicular to each other. The corners should at least accommodate the minimum bending radius of the optical cable used.
9.3.2 The top wireway can be installed close to or away from the top of the equipment. When the wiring trough is installed close to the top of the equipment, the height of the equipment should not be less than 2000mm; when the wiring trough is installed away from the top of the equipment, if the height of the equipment is not more than 2000mm, the distance should be 100mm; if the height of the equipment is less than 2000mm, the height of the wiring trough from the ground should not be less than 2000mm. 9.3.3 The width of the top wiring trough should be consistent with the width of the rack and fixed relatively to the wall, rack, roof or ground. 10 Removable connection
10.1 Threaded connection
10.1.1 Anti-loosening measures should be taken for tightening screws and nuts. When spring washers are used, the tightening degree shall be based on the flattening of the cut of the spring washer. It is not allowed to directly pad spring washers on parts with long holes or brittle materials (such as paper board, porcelain parts, etc.). 10.1.2 When tightening parts, they should be done symmetrically and cross-step to avoid deformation of components and poor contact. 10.1.3 The length of the end of the screw or bolt protruding from the nut shall generally not be greater than the diameter of the screw or bolt and shall not be less than two pitches. The effective length of the screw or bolt connection shall generally not be less than 3 pitches. 10.1.4 After the countersunk screw is tightened, its head shall remain flat with the surface of the fastened part and may be slightly lower than the surface of the part. Screws smaller than M4 shall not be lower than the surface of the part by 0.3mm, and screws larger than M5 shall not be lower than the surface of the part by 0.5mm. 10.2 Pin connection
10.2.1 The positioning and fixing of the pin shall be carried out after the relevant parts are adjusted appropriately. The protruding or sinking length of the two end faces of the cylindrical pin and the conical pin after assembly shall be roughly uniform. The length of the protruding surface of the conical pin shall not exceed the diameter of the small end. 10.2.2 After the cotter pin is assembled, the end opening angle shall be greater than 90.11 Non-detachable connection
11.1 Riveting
11.1.1 When riveting, it should be carried out symmetrically and step by step. After riveting, the rivet rod should not be loose. 11.1.2 When riveting semi-circular head and cylindrical head rivets, the rivet head should be completely flat on the riveted part, and the riveted end should be consistent with the shape of the rivet pot. No depression, notch or obvious cracking is allowed. When the rivet end is required to be flat with the surface of the part, it is allowed to be flattened. 11.1.3 When riveting with countersunk rivets, it should be kept flat with the riveted surface, and a slight depression is allowed. The rivet head shall not be more than 0.2mm below the surface of the part. The countersunk rivet with a diameter greater than 4mm shall not be more than 0.4mm below the surface of the part. 11.1.4 When riveting with hollow rivets, there shall be no more than three cracks on the riveted edge, and the depth of the cracks shall not exceed 1/2 of the riveted edge. 11.1.5 For parts that need to be expanded, such as riveted nuts, the rivet shall not crack, damage the thread or cause looseness after expansion. Punching, chiseling and thread recovery are allowed when necessary.
11.1.6 The surface of the riveted parts around the rivet head (within the range of d + 5mm, d is the rivet diameter) is allowed to have a slight depression, the depth of which shall not exceed 1/5 of the minimum thickness of the riveted parts, but the number of rivets with such defects shall not exceed 30% of the total number of rivets. 11.1.7 After riveting, appropriate remedial measures should be taken at the damaged coating. 11.2 Welding
11.2.1 The weldment should be cleaned before welding, and impurities such as welding slag, flux and oxide scale should be removed after welding. 11.2.2 The welding process should be carried out in a symmetrical and cross-sequence to avoid harmful deformation. 11.2.3 The welding should be firm and free of false welding. The weld should be continuous, uniform and smooth, without defects such as leaking welding, cracks, slag inclusions and material burn-through. 5
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When there are defects such as slag inclusions and pores in the weld, repair welding is allowed. 11.3 Bonding
Bonding should be done according to the use conditions of the equipment, and the adhesive should be correctly selected and prepared. Bonding should be carried out according to the process specifications, and there should be no adhesive on the non-bonding surface.
Transmission mechanism
The transmission mechanism should be flexible, precise, smooth, and well meshed, without sticking, stringing, jumping, etc. 12.2 The guide parts (guide rails, sliders, guide pillars, etc.) should ensure smooth movement in the forward and reverse directions without sticking, stagnation, jumping, etc. 12.3 The two sprockets should be installed on the same plane, and the deviation value should be less than 0.2% of the center distance between the two sprockets. 13 Inspection and Acceptance
13.1 Inspection
After the equipment is installed, the following items should be inspected: a.
Whether all required technical documents are complete; whether all fixed parts are firm and reliable; b.
Whether all moving parts are flexible;
Whether all fastening devices are positioned and reliable; e
Whether obstacles to ventilation and heat dissipation parts are removed; whether all protective facilities are complete and correctly installed. 13.2 Acceptance
Acceptance should comply with the following provisions:
Acceptance should be carried out after commissioning is completed and one week of operation: The installer should submit relevant information to the user; The user and the installer shall conduct the acceptance in accordance with the provisions of this standard and the equipment product standard; If any parts that do not meet the requirements are found, the responsible party shall be responsible for taking measures to solve them; The user and the installer shall sign for qualified acceptance. SJ20048--92
Appendix A
Maximum dimensions of ground optical fiber communication equipment
(reference)
This appendix is for reference when installing ground optical fiber communication equipment. Cabinet-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm; maximum depth: generally not more than 600mm.
A2 Rack-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm.
A3 Console-type equipment
Height of table from ground: 750~800mm;
Width of legroom under table: not less than 450mm; Height of legroom under table from ground: not less than 600mm; Maximum height of equipment: generally not more than 1300mm. Additional Notes:
This standard was proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 34th Institute of the Ministry of Machinery and Electronics Industry and China Electronics Technology Standardization Institute. The main drafters of this standard are Shi Liangliu, Mo Jinwen and Wang Ping. Project code: B93020.
The rack, cabinet, column and ground must be reinforced, and the upper beam should be reinforced with bolts, or other effective measures that have passed the test should be adopted.
8.2 Chassis
The chassis can be placed freely or fixed on the installation surface as needed. 8.2.1
The installation of the chassis inside the cabinet should follow the following principles: The heavy chassis is installed at the bottom of the cabinet;
Chassis with high heat generation is installed on both sides or above the cabinet: c.
Chassis that are sensitive to electromagnetic interference should be kept away. 8.2.3 When several smaller chassis are assembled according to a certain chassis specification space, buffer sheets such as rubber should be placed between the chassis. 8.2.4 After the chassis is fixedly installed, it should be ensured that no displacement or shaking occurs under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference surface after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-in boxes can be inserted flexibly, and the fastening device is reliable. 8.4 Rack
The recommended values of the verticality of the installed strip rack to the bottom reference surface and the parallelism tolerance between the racks are shown in Table 2.8.4.1
Rack height mm
Tolerance value m
8.4.2 Requirements Racks with fixed bases or installed on column racks should be installed firmly. 8.4.3 After the rack is installed, the plug-ins and plug-in boxes should be inserted flexibly, and the fastening device should be reliable. 9 Fiber optic patch panels and wiring ducts
9.1 General requirements
Fiber optic patch panels and wiring ducts should be coordinated with the equipment and allow optical cables, electrical cables, and wires to take the shortest route. 9.2 Fiber Optic Distribution Frame
, 9.2.1 The color of the fiber optic distribution frame should be consistent with the parallel equipment. The installation form and appearance of the distribution frame should be as consistent as possible with the parallel equipment.
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9.2.2 The distribution frame should be stable and firm after installation. If necessary, a shock-absorbing device should be provided. 9.3 Wiring Duct
9.3.1 The wiring trough should be installed along the shortest route, with the vertical and horizontal directions perpendicular to each other, and the corners should at least accommodate the minimum bending radius of the optical cable used.
9.3.2 The top wiring trough can be installed close to or away from the top of the equipment. When the wiring trough is installed close to the top of the equipment, the height of the equipment should not be less than 2000mm; when the wiring trough is installed away from the top of the equipment, if the height of the equipment is not more than 2000mm, the distance should be 100mm, and if the height of the equipment is less than 2000mm, the height of the wiring trough from the ground should not be less than 2000mm. 9.3.3 The width of the top wiring trough should be consistent with the width of the rack and fixed relatively to the wall, rack, roof or ground. 10 Removable connection
10.1 Threaded connection
10.1.1 Anti-loosening measures should be taken for tightening screws and nuts. When spring washers are used, the tightening degree is based on the flattening of the cut of the spring washers. It is not allowed to directly pad spring washers on parts with long holes or brittle materials (such as paper-coated boards, porcelain parts, etc.). 10.1.2 When tightening parts, symmetrical cross-stepping should be carried out to avoid deformation of components and poor contact. 10.1.3 The length of the end of the screw or bolt protruding from the nut shall generally not be greater than the diameter of the screw or bolt and shall not be less than two pitches. The effective length of the screw and bolt connection shall generally not be less than 3 pitches. 10.1.4 After the countersunk screw is tightened, its head shall remain flat with the surface of the fastened part, and it is allowed to be slightly lower than the surface of the part. Screws smaller than M4 shall not be lower than 0.3mm from the surface of the part, and screws larger than M5 shall not be lower than 0.5mm from the surface of the part. 10.2 Pin connection
10.2.1 The positioning and fixing of the pin shall be carried out after the relevant parts are adjusted appropriately. The protruding or sinking length of the two end faces of the cylindrical pin and the conical pin after assembly shall be roughly symmetrical. The length of the protruding surface of the conical pin shall not exceed the diameter of the small end. 10.2.2 After the cotter pin is assembled, the end opening angle shall be greater than 90.11 Non-detachable connection
11.1 Riveting
11.1.1 When riveting, it should be carried out symmetrically and crosswise in steps. After riveting, the rivet rod should not be loose. 11.1.2 When riveting semicircular head and cylindrical head rivets, the rivet head shall be completely flat on the riveted part, and the riveted end shall be consistent with the shape of the rivet pot. No depression, notch and obvious cracking are allowed. When the rivet end is required to be flat with the surface of the part, flattening is allowed. 11.1.3 When riveting with countersunk rivets, they should be kept flat with the riveted surface, and a slight depression is allowed. The rivet head shall not be more than 0.2mm below the surface of the part, and the countersunk rivet with a diameter greater than 4mm shall not be more than 0.4mm below the surface of the part. 11.1.4 When riveting with hollow rivets, there shall be no more than three cracks on the riveted edge, and the depth of the cracks shall not exceed 1/2 of the riveted edge. 11.1.5 For parts that need to be expanded, such as riveted nuts, after expansion, the rivets shall not crack, damage the threads, or cause looseness. Punching, chiseling and wire recovery are allowed when necessary.
11.1.6 The surface of the riveted parts around the rivet head (within the range of d + 5mm, d is the rivet diameter) is allowed to have a slight depression, and its depth shall not exceed 1/5 of the minimum thickness of the riveted parts, but the number of rivets with such defects shall not exceed 30% of the total number of rivets. 11.1.7 After riveting, appropriate remedial measures shall be taken at the damaged coating. 11.2 Welding
11.2.1 Before welding, the weldment should be cleaned, and after welding, impurities such as welding slag, flux and oxide scale should be removed. 11.2.2 The welding process should be carried out in a symmetrical and cross-sequence to avoid harmful deformation. 11.2.3 The welding should be firm and without false welding. The weld should be continuous, uniform and smooth, without defects such as leakage, cracks, slag inclusions and material burn-through. 5
SJ20048-92
When there are defects such as slag inclusions and pores in the weld, repair welding is allowed. 11.3 Bonding
Bonding should be based on the use conditions of the equipment, and the adhesive should be correctly selected and prepared. Bonding should be carried out according to the process specifications, and there should be no adhesive on the non-bonding surface.
Transmission mechanism
The transmission mechanism should be flexible, precise, smooth, and well meshed, without sticking, stringing, jumping and other phenomena. 12.2 The guide parts (guide rails, sliders, guide posts, etc.) should ensure smooth movement in the forward and reverse directions without jamming, stagnation, jumping, etc. 12.3 The two sprockets should be installed on the same plane, and the deviation value should be less than 0.2% of the center distance between the two sprockets. 13 Inspection and acceptance
13.1 InspectionWww.bzxZ.net
After the equipment is installed, the following items should be inspected: a.
Whether all required technical documents are complete; whether all fixed parts are firm and reliable: b.
Whether all moving parts are flexible;
Whether all fastening devices are positioned and reliable; e
Whether obstacles to ventilation and heat dissipation parts are eliminated; whether all protective facilities are complete and installed correctly. 13.2 Acceptance
Acceptance shall comply with the following provisions:
Acceptance shall be carried out after commissioning is completed and the equipment has been put into operation for one week: the installer shall submit relevant information to the user; the user and the installer shall carry out the acceptance in accordance with the provisions of this standard and the equipment product standard; if any parts that do not meet the requirements are found, the responsible party shall be responsible for taking measures to solve them; the user and the installer shall sign for the acceptance. SJ20048-—92
Appendix A
Maximum dimensions of ground optical fiber communication equipment
(reference)
This appendix is for reference when installing ground optical fiber communication equipment. Cabinet-type equipment
Maximum height: generally not more than 2600mm; maximum width:--generally not more than 1000mm; maximum depth: generally not more than 600mm.
A2 rack-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm.
A3 console table equipment
Height of table from ground: 750~800mm;
Width of legroom under table: not less than 450mm; Height of legroom under table from ground: not less than 600mm; Maximum height of equipment: generally not more than 1300mm. Additional remarks:
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard is drafted by the 34th Institute of the Ministry of Machinery and Electronics Industry and China Electronics Technology Standardization Institute. The main drafters of this standard are Shi Liangliu, Mo Jinwen and Wang Ping. Project code: B93020.
The rack, cabinet, column and ground must be reinforced, and the upper beam should be reinforced with bolts, or other effective measures that have passed the test should be adopted.
8.2 Chassis
The chassis can be placed freely or fixed on the installation surface as needed. 8.2.1
The installation of the chassis inside the cabinet should follow the following principles: The heavy chassis is installed at the bottom of the cabinet;
Chassis with high heat generation is installed on both sides or above the cabinet: c.
Chassis that are sensitive to electromagnetic interference should be kept away. 8.2.3 When several smaller chassis are assembled according to a certain chassis specification space, buffer sheets such as rubber should be placed between the chassis. 8.2.4 After the chassis is fixedly installed, it should be ensured that no displacement or shaking occurs under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference surface after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-in boxes can be inserted flexibly, and the fastening device is reliable. 8.4 Rack
The recommended values of the verticality of the installed strip rack to the bottom reference surface and the parallelism tolerance between the racks are shown in Table 2.8.4.1
Rack height mm
Tolerance value m
8.4.2 Requirements Racks with fixed bases or installed on column racks should be installed firmly. 8.4.3 After the rack is installed, the plug-ins and plug-in boxes should be inserted flexibly, and the fastening device should be reliable. 9 Fiber optic patch panels and wiring ducts
9.1 General requirements
Fiber optic patch panels and wiring ducts should be coordinated with the equipment and allow optical cables, electrical cables, and wires to take the shortest route. 9.2 Fiber Optic Distribution Frame
, 9.2.1 The color of the fiber optic distribution frame should be consistent with the parallel equipment. The installation form and appearance of the distribution frame should be as consistent as possible with the parallel equipment.
SJ20048-92
9.2.2 The distribution frame should be stable and firm after installation. If necessary, a shock-absorbing device should be provided. 9.3 Wiring Duct
9.3.1 The wiring trough should be installed along the shortest route, with the vertical and horizontal directions perpendicular to each other, and the corners should at least accommodate the minimum bending radius of the optical cable used.
9.3.2 The top wiring trough can be installed close to or away from the top of the equipment. When the wiring trough is installed close to the top of the equipment, the height of the equipment should not be less than 2000mm; when the wiring trough is installed away from the top of the equipment, if the height of the equipment is not more than 2000mm, the distance should be 100mm, and if the height of the equipment is less than 2000mm, the height of the wiring trough from the ground should not be less than 2000mm. 9.3.3 The width of the top wiring trough should be consistent with the width of the rack and fixed relatively to the wall, rack, roof or ground. 10 Removable connection
10.1 Threaded connection
10.1.1 Anti-loosening measures should be taken for tightening screws and nuts. When spring washers are used, the tightening degree is based on the flattening of the cut of the spring washers. It is not allowed to directly pad spring washers on parts with long holes or brittle materials (such as paper-coated boards, porcelain parts, etc.). 10.1.2 When tightening parts, symmetrical cross-stepping should be carried out to avoid deformation of components and poor contact. 10.1.3 The length of the end of the screw or bolt protruding from the nut shall generally not be greater than the diameter of the screw or bolt and shall not be less than two pitches. The effective length of the screw and bolt connection shall generally not be less than 3 pitches. 10.1.4 After the countersunk screw is tightened, its head shall remain flat with the surface of the fastened part, and it is allowed to be slightly lower than the surface of the part. Screws smaller than M4 shall not be lower than 0.3mm from the surface of the part, and screws larger than M5 shall not be lower than 0.5mm from the surface of the part. 10.2 Pin connection
10.2.1 The positioning and fixing of the pin shall be carried out after the relevant parts are adjusted appropriately. The protruding or sinking length of the two end faces of the cylindrical pin and the conical pin after assembly shall be roughly symmetrical. The length of the protruding surface of the conical pin shall not exceed the diameter of the small end. 10.2.2 After the cotter pin is assembled, the end opening angle shall be greater than 90.11 Non-detachable connection
11.1 Riveting
11.1.1 When riveting, it should be carried out symmetrically and crosswise in steps. After riveting, the rivet rod should not be loose. 11.1.2 When riveting semicircular head and cylindrical head rivets, the rivet head shall be completely flat on the riveted part, and the riveted end shall be consistent with the shape of the rivet pot. No depression, notch and obvious cracking are allowed. When the rivet end is required to be flat with the surface of the part, flattening is allowed. 11.1.3 When riveting with countersunk rivets, they should be kept flat with the riveted surface, and a slight depression is allowed. The rivet head shall not be more than 0.2mm below the surface of the part, and the countersunk rivet with a diameter greater than 4mm shall not be more than 0.4mm below the surface of the part. 11.1.4 When riveting with hollow rivets, there shall be no more than three cracks on the riveted edge, and the depth of the cracks shall not exceed 1/2 of the riveted edge. 11.1.5 For parts that need to be expanded, such as riveted nuts, after expansion, the rivets shall not crack, damage the threads, or cause looseness. Punching, chiseling and wire recovery are allowed when necessary.
11.1.6 The surface of the riveted parts around the rivet head (within the range of d + 5mm, d is the rivet diameter) is allowed to have a slight depression, and its depth shall not exceed 1/5 of the minimum thickness of the riveted parts, but the number of rivets with such defects shall not exceed 30% of the total number of rivets. 11.1.7 After riveting, appropriate remedial measures shall be taken at the damaged coating. 11.2 Welding
11.2.1 Before welding, the weldment should be cleaned, and after welding, impurities such as welding slag, flux and oxide scale should be removed. 11.2.2 The welding process should be carried out in a symmetrical and cross-sequence to avoid harmful deformation. 11.2.3 The welding should be firm and without false welding. The weld should be continuous, uniform and smooth, without defects such as leakage, cracks, slag inclusions and material burn-through. 5
SJ20048-92
When there are defects such as slag inclusions and pores in the weld, repair welding is allowed. 11.3 Bonding
Bonding should be based on the use conditions of the equipment, and the adhesive should be correctly selected and prepared. Bonding should be carried out according to the process specifications, and there should be no adhesive on the non-bonding surface.
Transmission mechanism
The transmission mechanism should be flexible, precise, smooth, and well meshed, without sticking, stringing, jumping and other phenomena. 12.2 The guide parts (guide rails, sliders, guide posts, etc.) should ensure smooth movement in the forward and reverse directions without jamming, stagnation, jumping, etc. 12.3 The two sprockets should be installed on the same plane, and the deviation value should be less than 0.2% of the center distance between the two sprockets. 13 Inspection and acceptance
13.1 Inspection
After the equipment is installed, the following items should be inspected: a.
Whether all required technical documents are complete; whether all fixed parts are firm and reliable: b.
Whether all moving parts are flexible;
Whether all fastening devices are positioned and reliable; e
Whether obstacles to ventilation and heat dissipation parts are eliminated; whether all protective facilities are complete and installed correctly. 13.2 Acceptance
Acceptance shall comply with the following provisions:
Acceptance shall be carried out after commissioning is completed and the equipment has been put into operation for one week: the installer shall submit relevant information to the user; the user and the installer shall carry out the acceptance in accordance with the provisions of this standard and the equipment product standard; if any parts that do not meet the requirements are found, the responsible party shall be responsible for taking measures to solve them; the user and the installer shall sign for the acceptance. SJ20048-—92
Appendix A
Maximum dimensions of ground optical fiber communication equipment
(reference)
This appendix is for reference when installing ground optical fiber communication equipment. Cabinet-type equipment
Maximum height: generally not more than 2600mm; maximum width:--generally not more than 1000mm; maximum depth: generally not more than 600mm.
A2 rack-type equipment
Maximum height: generally not more than 2600mm; maximum width: generally not more than 1000mm.
A3 console table equipment
Height of table from ground: 750~800mm;
Width of legroom under table: not less than 450mm; Height of legroom under table from ground: not less than 600mm; Maximum height of equipment: generally not more than 1300mm. Additional remarks:
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard is drafted by the 34th Institute of the Ministry of Machinery and Electronics Industry and China Electronics Technology Standardization Institute. The main drafters of this standard are Shi Liangliu, Mo Jinwen and Wang Ping. Project code: B93020.4 After the chassis is fixed and installed, it should be ensured that there is no displacement or shaking under normal working conditions. 8.3 Cabinet
8.3.1 The recommended values of the verticality tolerance of the cabinet frame to the bottom reference plane after installation are shown in Table 1. Table 1
Cabinet height
Tolerance value
8.3.2 After the cabinet is installed, there should be no deformation, the doors and windows can be opened and closed freely, the plug-ins and plug-in boxes can be inserted flexibly, and the tightening device is reliable. 8.4 Rack
The recommended values of the verticality tolerance of the installed strip rack to the bottom reference plane and the parallelism tolerance between the racks are shown in Table 2. 8.4.1
Rack height mm
Tolerance value m
8.4.2 Racks that require the base to be fixed or installed on the column rack should be installed firmly. 8.4.3 After the rack is installed, the plug-ins and plug-in boxes should be inserted flexibly, and the tightening device should be reliable. 9 Fiber Optic Distribution Frame and Wire Duct
9.1 General Requirements
Fiber optic distribution frame and wire duct shall be coordinated with the equipment and make the optical cables, electric cables and wires take the shortest route. 9.2 Fiber Optic Distribution Frame
, 9.2.1 The color of the fiber optic distribution frame shall
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