The first part of the program-controlled switching equipment engineering installation construction specification
I. Installation process
1 rack equipment
1.1 The location of the rack equipment in the server room is installed correctly, in line with the requirements of the installation engineering design plan.
1.2 Measured by hanging pendant, the vertical deviation of rack installation should be no more than 3mm.
1.3 The side of the main aisle of the large column must be aligned into a straight line, with an error of no more than 5mm. neighboring racks should be close together;
The whole column of the machine surface should be in a plane, no concavity or convex phenomenon.
1.4 All kinds of bolts must be tightened, and the length of similar screws exposing the nut should be the same.
1.5 The various parts of the frame shall not fall off or broken, paint should be repainted if peeling. All kinds of words and symbols should be correct, clear and complete.
1.6 racks and columns must be reinforced according to the seismic requirements of the construction drawings.
1.7 alarm display unit installation position is correct and reasonable, alarm sign is clear.
2 machine and peripheral terminal equipment
2.1 machine position should be installed correctly, neatly installed, the edge of the machine should be a straight line, neighboring machines close together, the table surface to maintain the level of each other, the articulation is not obvious high and low phenomenon.
2.2 Terminal equipment should be equipped with complete, installed in place, complete and correct signs.
3 total distribution frame and all kinds of distribution frame
3.1 total distribution frame base position should be corresponding to the cable into the end of the upper line groove or upper line hole. Jumper ring position should be straight and neat.
3.2 the total wiring rack slide installation should be firm and reliable, smooth sliding, slide track splicing, handbrake sensitive.
3.3 the total distribution frame and all kinds of distribution frame (including digital distribution frame, intermediate distribution frame, etc.) the vertical error of the upper and lower ends of the straight column should be no more than 3mm, the base level error per meter is no more than 2mm.
3.4 the distribution frame terminal board installation position should be in line with the design of the construction drawings, a variety of signs are complete and complete.
3.5 Distribution frame must be seismic reinforcement according to the requirements of the construction drawings.
3.6 the total distribution frame inline alarm device and the total alarm device equipment installation is complete.
4 cable aisle and trough
4.1 cable aisle and trough installation position should be in accordance with the provisions of the construction drawings, the left and right deviation shall not exceed 50mm.
4.2 installation of the aisle should be in accordance with the following provisions:
1) horizontal aisle should be kept parallel with the column frame or intersected at right angles, and the level of each meter deviation shall not exceed 2mm;
2) vertical aisle should be kept parallel with the column frame or intersected at right angles, and the level of each meter deviation shall not exceed 2mm. p>2) Vertical aisle should be kept perpendicular to the ground and no tilt phenomenon, vertical deviation does not exceed 3mm.
3) The installation of the aisle hanger should be neat and firm, keep vertical, no skew phenomenon.
4.3 cable aisle through the floor holes or wall holes, should be added sub-port protection. After the cable put tied, there should be a cover plate to seal the hole, sub-port and cover should be flame retardant materials, the paint color should be consistent with the color of the floor or wall.
4.4 Installation of single or bilateral cable walkway along the wall, buried in the wall of the support should be firm and reliable, along the horizontal direction of the spacing distance uniform. After installation, the aisle should be neat and consistent, there shall be no undulation or skewed phenomenon.
4.5 Installation of the aisle should comply with the following provisions:
1) square and firm, and keep vertical with the large column;
2) between the columns of the aisle should be a straight line, from the front to the back of the left and right deviation of not more than 3mm;
3) the two outer aisle splicing the level of deviation of not more than 2mm;
4) the deployment of the cable and the power line of the check.
5 Laying cables
5.1 The specification, routing, cross-section and position of laying cables shall be in accordance with the provisions of the construction drawings, and the cables shall be arranged in a neat manner with no damage to the outer skin.
5.2 AC and DC power feeder cables must be placed separately; power cables, signal cables, user cables and relay cables should be placed separately.
5.3 Cable turns should be uniform and smooth, the radius of curvature of the cable bend should be greater than 60mm.
5.3 The layout of the aisle cable must be tied. After tying the cable should be close to each other, the appearance of straight and neat. Wire buckle spacing is uniform,
Loosening and tightening. Tying with twine must be infested with wax.
5.4 laying groove cable can not tie, the groove cable should be straight, as far as possible, do not cross. In the cable in and out of the groove parts and cable turns should be tied or fixed with plastic card binding.
5.5 in the movable floor under the floor of the cable, should pay attention to straight and not messy, try to avoid cross, and shall not block the air supply channel.
6 plugging inter-shelf cable and wiring
6.1 inter-shelf cable plugging, cable direction and routing are in line with the manufacturer's relevant provisions.
6.2 Inter-shelf cables and wiring must be clearly marked at both ends, and must not be misconnected or omitted.
6.3 Plugging parts should be tight and secure, good contact. Plug terminals are not broken or bent.
6.4 The appearance of inter-frame cables and wiring is straight and neat.
7 laying power lines
7.1 DC power line installation routing, number of routes and placement should be in accordance with the provisions of the construction drawings. The specification of the power line and the capacity of the fuse should meet the design requirements.
7.2 The power line must use the whole section of the wire material, no joints in the middle.
7.3 The AC power cord for the exchange system must have a grounding protection wire.
7.4 DC power line into the end of the successive connection is secure, good contact, voltage drop indicators and potential to ground in line with the design requirements.
7.5 Each DC feeder line of the computer room, together with the connected power lines and racks in the columns of the introduction of the line when the ends are vacated, with a 500V megohmmeter to test the positive and negative wires and the negative line to the ground between the insulation resistance shall not be less than 1MΩ.
7.6 Switching system using the AC power supply line when the ends of the line when the ends are vacated, with a 500V megohmmeter to test the insulation resistance between the core wire and the core wire to the ground shall not be less than 1MΩ.
7.6 Exchange system using AC power lines, with 500V megohmmeter to test the core wire and core wire to the ground insulation resistance shall not be Less than 1MΩ.
7.7 Columns of feeder lines using overhead laying, copper (aluminum) bars should be neat and straight, can not see any obvious unevenness and hammer marks.
The fixing methods and requirements of the conductors shall be in accordance with the provisions of the construction drawings.
7.8 Copper (aluminum) feeder line in the positive line painted with red paint mark, other power lines of different voltages have different colors to distinguish the mark. Paint should be smooth and even, there should be no leakage of paint and flow marks.
7.9 When rubber insulated wires are used as DC feeder wires, each pair of feeder wires should be kept parallel, and there should be uniform red and blue markings on both ends of the positive and negative wires.
The ends of the installed power cables must be capped with tape and other insulators, and the cable cut-outs must be sealed with tape and sheath.
Two, system inspection and testing
1 check before power-on test
1.1 The nominal DC working voltage of program-controlled switching equipment is -48V, and the permissible range of voltage change is -57~-40V.
1.2 Before powering on the equipment, it should be inspected for the following:
1) the number, specification and installation of various circuit boards position in line with the construction documents;
2) equipment marking complete and correct;
3) equipment of various selector switches should be placed in the designated position;
4) equipment at all levels of fuse specifications in line with the requirements;
5) columns of shelves, racks and various wiring racks are well grounded;
6) equipment inside the power supply cabling is not grounding phenomenon.
1.3 Before the switch is powered on, the power supply voltage should be measured on the main power input terminals in the server room to make sure it is normal before the power-on test.
2 Hardware Inspection and Testing
2.1 Hardware equipment at all levels should be added to the power supply level by level according to the operating procedures provided by the manufacturer.
2.2 After the equipment is energized, check that the output voltages of all converters should comply with the regulations.
2.3 All kinds of peripheral terminals should be fully equipped and self-tested normally. The fan device in the equipment should run well.
2.4 check the switch, distribution frame and other levels of audible and visible alarm signaling devices should work properly, alarm accurate.
2.5 switching system configuration of the clock synchronization device should work properly. All levels of switching centers equipped with clock level and performance parameters should be in line with relevant national standards and regulations.
2.6 Load the test program, test and check the equipment through human-machine commands or self-test, confirm that the hardware system is free from faults, and provide the test report.
3 System Inspection and Testing
3.1 The inspection and testing of the switching system shall include the following major items:
1) System establishment function
(1) system initialization;
(2) automatic/manual reloading of the system;
(3) automatic/manual restarting of the system.
2) Switching functions of the system
(1) local and incoming/outgoing calls of municipal telephone (including mobile bureaus);
(2) municipal telephone exchange calls;
(3) incoming and outgoing calls to and from various subscriber exchanges;
(4) incoming and outgoing calls to and from domestic and international long-distance calls (manually, semi-automatically, and automatically);
(5) municipal-long-distance calls;
(6) automatic/manual re-loading;
(7) automatic/manual re-starting of the system. p>(5) City-long and long-city inter-office trunk circuit calls;
(6) billing functions;
(7) non-telephony services;
(8) special service calls;
(9) new service performance;
(10) intelligent network functions;
(11) ISDN features.
3) Maintenance and management functions of the system
(1) Software version checking for compliance with the contract;
(2) Verification of man-machine commands;
(3) Testing of the alarm system;
(4) Observation of and statistics on voice services;
(5) Routine testing;
(6) Trunks and subscriber line manual testing;
(7) standardized inspection and management of subscriber data and bureau data generation;
(8) troubleshooting;
(9) automatic reversal of redundant equipment;
(10) performance testing of input and output equipment.
4) Signal mode and network support of the system
(1) Signal mode of the user (analog, digital);
(2) Signal mode between bureaus (follow-me, ****-me);
(3) Net-synchronization function of the system;
(4) Net-management function of the system;
(5) 112 automatic acceptance, automatic test function.
3.2 equipment after rigorous system checking and testing, that the stability has reached the initial inspection requirements, you can test the inspection records complete handover to the engineering acceptance team, ready for the initial inspection test.
Part II Transmission Equipment Engineering Installation and Construction Specifications
I. Preparation before construction
1 Requirements for the equipment room
1.1 Before the start of the project must be inspected before the start of the construction of the equipment room building conditions, with the following conditions:
1) the interior of the equipment room renovation has been fully completed. Indoor has been fully dry, the ground, walls, ceiling and other places of the reserved holes, buried parts of the specifications, dimensions, location, quantity, etc. should be in line with the design requirements of the construction drawings;
2) groove routing, specifications should be in line with the design requirements of the construction drawings, the cover plate should be tight, solid, the groove does not seepage;
3) the utility has been introduced into the server room, the server room lighting can be used normally;
4) ventilation, ventilation, air-conditioning and other conditions. ) ventilation and ambient, air conditioning and other facilities have been installed and can provide use. Indoor temperature and humidity should meet the requirements of the equipment;
5) The lightning protection grounding and protection grounding of the computer room building, the working grounding body and leads have been completed and accepted, and the grounding resistance must be in accordance with the requirements of the design of the construction drawings;
1.2 There must be effective fire-fighting facilities in the computer room. The storage of flammable and explosive and other dangerous goods is strictly prohibited in and near the equipment room.
2 the inspection of equipment.
2.1 before the start of the construction unit, material supply units, construction units and maintenance units should form a joint inspection team to arrive at the construction site of the equipment, the main material varieties, specifications, quantities of unpacking inventory and appearance check, with the following conditions before starting:
1) racks, sub-frame frames, reinforcements and the impact of cabling, wiring of the machine tray must be all in all, the specifications meet the design requirements of the construction drawings. Specifications and models in line with the design requirements of the construction drawings, the appearance of no damage phenomenon;
2) cable channel or cable walkway and other iron parts must be all together, specifications and programs in line with the design requirements of the construction drawings. On the beam, even fixed iron, aisle flat iron, between the columns of bracing iron and other iron should be straight;
3) copper or aluminum row specifications program work, the number should be in line with the requirements of the construction drawings design, no obvious distortion phenomenon;
3) RF coaxial cables, audio wiring cables, power cables, protective ground cables, data cables and other major cable specifications program, the number of design should be in line with the requirements of the construction drawings; a variety of cables, Line material outer skin intact, meet the factory insulation index requirements.
2.2 The Joint Inspection Unit shall make detailed records when opening and inspecting the equipment and materials of the Bureau (station), and shall contact the relevant units by the material supply unit in time to solve the problem when shortages, dampness and damages are found.
2.3 Unqualified materials shall not be used in construction. When the specification of the main materials does not meet the requirements of the construction plan design and other materials are needed instead, prior consent must be obtained from the design unit and the necessary procedures must be carried out before use.
Two, equipment installation
1 channel, column cabinet installation
1.1 channel installation should comply with the following requirements:
1)The installation position of the channel should be in line with the plan design of the construction drawings, and the deviation should not be more than 50mm.
2)Column channel should be in a straight line, and the deviation should not be more than 30mm.
1.2 Connectivity Iron and upper beam, channel and upper beam connection should be firm, straight, no obvious bending; cable bracket installation should be square, distance uniform.
1.3 columns of grooves on both sides of the board should be respectively with the top of the rack before and after the panel, the gap between the side of the board should be uniform, the cover, the parts are fully installed.
1.4 main channel cover, side panels, bottom plate installation should be complete, parts should be complete, gap uniform.
1.5 The installation of the bracing iron between columns should be in a straight line, and the reinforcement of the two ends to the wall should be in accordance with the design requirements of the construction drawings.
1.7 Iron paint should be intact, such as the need to fill the paint color and the original paint color should be basically the same.
2 rack installation
2.1 The installation position of the rack should be in accordance with the design requirements of the construction drawings.
2.2 The installation of the rack should be upright and firm, vertical deviation should not be greater than 1 ‰ of the height of the rack.
2.3 Columns of racks should be close to each other, rack clearance shall not be greater than 3mm, columns of machine surface flush, no obvious jagged phenomenon.
2.4 racks should be used expansion bolts (or wood bolts) to the ground reinforcement, the top of the racks should be used plywood and column channel (column aisle) on the sorghum reinforcement.
2.5 All fasteners must be tightened, the same type of screws exposed nut length should be consistent.
2.6 Optical fiber distribution frame (ODF), digital distribution frame (DDF) terminal board location, installation arrangement and various signs should be in line with the design requirements. flange on the ODF frame should be installed in the correct position, firm, consistent direction.
2.7 The seismic reinforcement of the equipment shall comply with the requirements of seismic reinforcement of communication equipment installation of the Ministry of Posts and Telecommunications, and the reinforcement method shall comply with the design requirements of the construction drawings.
2.8 Installation of subracks
1) The safety of subracks shall comply with the following requirements;
2) The panel arrangement shall comply with the design requirements;
3) The reinforcement of subracks and racks shall comply with the requirements for the assembly of the equipment;
4) The installation of subracks shall be firm, neatly arranged, and the inserts shall have good contact;
5) The installation of the network management equipment shall conform to the design requirements of the construction drawings.
3 cable placement and end
3.1 laying cable and fiber optic connecting line
1) fiber optic connecting line specifications, programming should be in line with the design provisions, technical indicators should be in line with the requirements of the design documents and technical specifications.
2)Fiber optic connection line routing should be consistent with the provisions of the construction design documents.
3)The remaining length of the two ends of the fiber optic connection line should be uniform and meet the process requirements.
4)The radius of curvature of the fiber optic connection line in the channel at the corner is not less than 38 ~ 40mm.
3.2 Fiber optic connection line
1)Fiber optic connection line in the channel should be added to protect the sleeve or groove. No sleeve to protect the part should be tied with a live buckle tie, tie should not be tied too tight.
2)After braiding fiber optic connection line in the channel should be straight, no obvious twisting.
3.3 Placement of digital distribution frame patch cords
1) Patch cable specifications should be in line with the requirements of the design documents or technical specifications.
2)The direction and routing of the patch cables should be in accordance with the design regulations.
3) Patch cables should be placed straight, firmly bundled, loose and tight.
3.4 cable into the end and protection
1) RF coaxial cable end processing should be in line with the following provisions:
(1) cable residual length should be uniform, coaxial cable peeling dimensions of each layer should be suitable for the corresponding part of the cable plug;
(2) core wire soldering is correct, firm, the right amount of solder, weld smooth, not with a tip, no tumor shape. When assembling coaxial cable plugs, accessories should be complete, correct position, assembly firm.
2) Shielded wire end processing: the length of the cut head should be consistent, and coaxial terminals with good contact with the outer conductor.
3)Cutting head outside the need for heat shrinkable sleeve, heat shrinkable sleeve length should be uniform and moderate, uniform heat shrinkage.
4 Equipment inspection and native testing
4.1 Power supply and alarm function inspection
1)The power supply conditions should be in accordance with the following provisions:
(1) the power supply voltage range should meet the requirements of the equipment use;
(2) power supply protection switching should be in accordance with the technical provisions of the equipment.
Part III Power Equipment Engineering Installation and Construction Specifications
This specification is drafted in accordance with the "Design Code for the Installation of Telecommunications Power Equipment", "Technical Specification for the Construction and Acceptance of Telecommunications Power Equipment Installation Engineering", and the "Telecommunications Air Conditioning Equipment Maintenance Manual".
I. According to the project built to support the power supply project.
Second, according to the planning and site survey, to determine the power supply program, involving the power supply bureau reported to the power supply bureau for approval.
Three, calculate the equipment power consumption, heat generation, and based on this equipment selection and commercial negotiations, the selected equipment must be in line with the provincial selection range.
Four, commissioned design (high and low voltage system commissioned by the power supply bureau for construction design).
V. Upon arrival of the equipment, the qualified installation company will be organized to carry out the installation.
1, pre-construction inspection and opening inspection
1.1 civil engineering of the power plant room has been completed, the ground is flat and dry, doors and windows are fully installed, and the walls are painted.
1.2 Lighting, power supply, ventilation should have construction conditions.
1.3 reserved holes, wire channel, frame, electrostatic flooring, pre-buried steel pipe, pre-buried hanging bolts, the location of the wire frame should be in line with the design provisions; reserved holes frame installation is complete, straight and neat; the floor groove cover plate is flat, evenly painted; pre-buried steel pipe of the right caliber, smooth mouth, bending radius in line with the design provisions, the pipe is dry and no stagnant water; the wire frame is firm and straight.
1.4 equipment unpacking should be carried out by the manufacturer, the construction unit, the construction unit **** with a detailed record and meet the following requirements:
1) no damage to the equipment;
2) equipment attachments and technical information is complete.
2, equipment installation
2.1 Distribution screen and various converter equipment between the front of the main walkway net width should not be less than 2m;
2.2 Distribution screen and various converter equipment between the front and side of the maintenance of the net width of the walkway should not be less than 1.2m;
2.3 Distribution screen and various converter equipment between the back of the front of the maintenance walkway should not be less than 1.5m. The net width should not be less than 1.5m;
2.4 The net width of the maintenance aisle between the back of the distribution panel and various converter equipment should not be less than 1~1.2m;
2.5 The distribution panel and various converter equipment can be installed in the same row with the communication equipment; the main aisle between the front of the distribution panel and various converter equipment and the front or back of the communication equipment should not be less than 2m;
2.6 The net width between the back of the distribution panel and various converter equipment and the front or back of the communication equipment shall be determined in accordance with the corresponding arrangement requirements of the communication equipment.
2.7 The net width of the main aisle between the front and the wall of the distribution panel and various converter equipment shall not be less than 1.5m;
2.8 The net width of the secondary aisle between the back of the distribution panel and various converter equipment and the wall shall not be less than 0.8m;
If it is the main aisle, the net width of the aisle shall not be less than 1m;
2.9 The equipment mounting position shall be consistent with the Design provisions, the deviation should not be more than 10mm;
2.10 racks reinforced firmly, the reinforcement should be in line with the design provisions. The machine surface of a row of racks should be straight,
the deviation should be no more than 3mm per meter, and the deviation of the whole row should be no more than 15mm, the top surface of the racks should be flush, and the racks should be close to each other.
2.11 rack installation should be straight, the deviation should not be more than 2 mm;
2.12 rack grounding resistance should be in line with the design;
2.13 wiring is correct, no touching the ground, short-circuit and so on, the insulation resistance to the ground should be not less than 2 megohms.
3, the layout of the battery pack
3.1 The ground is flat and dry, doors and windows are fully installed, the walls are painted.
3.2 Standing battery group between the net width of the aisle should not be less than 1.5 times the width of the battery, the minimum should not be less than 8m;
3.3 Standing double-layer arrangement of the battery group, the headroom between the upper and lower layers of the distance between the battery height of the total of 1.2 ~ 1.5 times.
3.4 Standing double-layer arrangement of battery packs, a group of batteries between the two columns of the net width should meet the structural requirements of the electrical seismic frame.
3.5 Standing battery group side and the wall of the secondary walkway between the net width should not be less than 0.8m; such as the main walkway, the net width is generally not less than 1.5 times the width of the battery, the minimum should not be less than 1m; standing single-layer column arrangement of the battery group can be set up along the wall, and its side and the wall between the net width of the general is 0.1m;
3.6 Standing battery group end against the wall When set up, the net width between the batteries at the end of the column and the wall is generally not less than 0.2m;
3.7 One end of the vertical storage battery group near the entrance and exit of the machine room, there should be a main aisle, the net width is generally 1.2 ~ 1.5m, the minimum should be 1m.
3.8 The net width between the side of the lying valve-regulated storage battery group should not be less than 0.2m;
3.9 The net width of the aisle between the front, or between the front and the side or back of the horizontal valve-regulated battery pack should not be less than 1.5 times the total height of the battery, and the minimum should not be less than 1.2m.
3.10 The net width of the aisle between the front and the wall of the horizontal valve-regulated battery pack should not be less than 1.5 times the total height of the battery, and the minimum should not be less than 1m;
3.11 Horizontal discharge valve-regulated The battery pack is set up against the wall, the net width between the back and the wall is generally 0.1m;
3.12 The net width between the side and the wall of the horizontal valve-regulated battery pack should not be less than 0.2m.
3.13 Valve-regulated battery packs can be installed in the same machine room with communications equipment, power distribution panels and various converter equipment, the use of battery cabinets, but also with the same equipment;
3.14 vertical put valve-regulated battery pack side or column end battery and communication equipment and power distribution panels and a variety of converter equipment between the front of the main aisle net width, should not be less than 2m; put valve-regulated battery pack side and communication equipment, power distribution panels and a variety of converter equipment between the side or back of the maintenance of the net width of the aisle should not be less than 0.8m;
3.15 horizontal put valve-regulated battery pack front The net width of the main aisle between the front of communication equipment, power distribution panel and various converter equipment should not be less than 2m; the net width of the maintenance aisle between the side or back of the lying valve-regulated battery pack and the communication equipment, power distribution panel and various converter equipment should not be less than 0.8m, and it can be tightened when installed in the same row.
4, diesel generator sets
4.1 Pre-construction inspection and opening inspection:
1) the civil construction of the oil engine room has been completed, the ground is flat and dry, the doors and windows are fully installed, the walls painted, the water and sewage pipes have been delivered to the use of well ventilated, well-lighted, and construction of electricity, fire-fighting facilities;
the location of the foundation, the size of the reserved holes, ground Slot, cover, etc. should be in line with the design provisions;
3) oil machine foundation should be level, clean and firm;
4) oil grade and type should be in line with the manufacturer's instructions;
5) equipment unpacking should be carried out by the manufacturer, the construction unit, the construction unit **** the same, to make a detailed record and comply with the following requirements:
(1) no damage to the equipment;
(2) the equipment is not damaged;
(3) the equipment is not damaged;
(4) the equipment is not damaged;
5) the equipment is not damaged. p>
(2) equipment accessories and technical information is complete.
4.2 Pipe type, diameter, wall thickness should be in accordance with the design provisions, pipe surface smooth and clean, no deformation, cracks.
4.3 piping system installation location and assembly method should be consistent with the design, assembly straight and secure, the connection screws should be tightened, no water, gas and oil leakage.
4.4 buried in the ground steel pipe, should not pass through other equipment and the foundation of the building, and should be coated with asphalt or anticorrosion paint outside the steel pipe.
4.5 Pipe painting should be in accordance with the design provisions. When there is no regulation, the paint color is as follows:
Gas pipe: sky blue;
Oil pipe: fuel pipe brown-red;
Exhaust pipe: silver pink.
5, feeder bus
5.1 pre-construction inspection:
1) according to the DC distribution screen and the location of the reserved cavity, check the bus line routing is reasonable;
2) bus material specifications, the number of bus materials should be in line with the design provisions;
3) bus materials should be polished surface, there shall be no cracks, pockmarks and air holes;
4) the specifications, quality and quantity of steel, through-wall partition, support insulators should be in accordance with the design;
5.2 busbar processing:
1) the surface of the busbar can not be seen obvious hammer marks, cut flush burr-free;
2) busbar turn shall not have cracks and obvious wrinkles, the turn of the bending radius of the same;
3) the striped Busbar processing shall not be carried out in the case of heating;
5.3 busbar assembly connection:
1) busbar and busbar and busbar and equipment terminal connection, the contact surface should be flat, close contact, terminal should not be subject to external stress.
2) bus installation position and distance should be in accordance with the design provisions, installation of secure, maintain vertical and horizontal; but the bus flat, through the screws should be threaded from the bottom upwards, the rest of the nut should be installed to facilitate the maintenance of the side;
3) bus screws on both sides should be installed with a flat washer, in the side of the nut should be fitted with a spring washer;
4) washer appearance should be smooth, there are more than one screws When there are more than one screws, there should be more than 3 millimeters of clearance between the washers;
5) Screws are tightened, the wire buckle exposed not less than 2 wire buckle;
6) Battery room of the copper bus used to reinforce the screws should be coated with a thin layer of neutral Vantulin in the penetration of the fastening;
7) There shall be no joints in the hole over the wall;
8) All should be painted bus should be brushed two, even paint, no wrinkles, no flow marks; connection of the bus should not have any joints;
8) All should be brushed twice, paint uniform, no The connecting part and the section within 5mm on both sides of the joints shall not be painted;
9) The positive pole of DC system shall be painted in red, and the negative pole shall be painted in blue;
10) The color of the busbars of each phase of the AC system shall be painted as follows:
The first phase (A): yellow; the second phase (B): green;
The third phase (C): red; the neutral (N): purple;
The third phase (C): red; and the neutral (N): purple;
11) The third phase (C): red. ): purple;
Earth (E): black;
11) busbar installation is completed, in the relative humidity is not greater than 80%, with 500 volts megohmmeter test between the lines and to the ground insulation resistance should be greater than 1 ohm.
12) under full load, the voltage drop should be in accordance with the design provisions.
6, laying power lines
6.1 power line specifications, program, the number should be consistent with the design.
6.2 copper nose, screws and other major materials specifications, the number should be consistent with the design.
6.3 power line routing and cross-section should be consistent with the design. DC power lines and AC lines should be laid separately to avoid bundling in the same bundle.
6.4 cable laid along the ground should not be directly in contact with the concrete floor.
6.5 laying power lines should be straight and close, neat, there shall be no sharp bends and uneven phenomenon; in the alignment frame laying power line tie interval should be in line with the design provisions, tie the line buckle neat, loose and tight appropriate, buckle in the center line of the two cables, twine in the cross iron under the non-crossing, twine nodes hidden but not exposed to the outside.
6.6 power line turn, the bending radius should be in accordance with the design provisions, the cable shall not be less than 6 times its radius.
6.7 power line through the steel pipe should be consistent with the design
1) the steel pipe should be smooth, clean, dry, tight joints, no screw joints;
2) the diameter of the steel pipe and the location of the steel pipe should be consistent with the design;
3) the power line into the pipe shall not have a connector, threading the pipe should be threaded according to the design provisions of the pipe mouth sealing;
4) not the same voltage power cables shall not be worn in the same tube.
5) outdoor direct burial cable should be treated as hidden works. In the event of obstacles or cross the road should be laid through the steel pipe, in the middle of the joints or terminals should be left 2-3 meters of residual length.
6.8 power cord and equipment connection
1) power cord part of the head are wrapped with plastic tape wrapping thickness and insulation outside the same batch, each power cord
wrapping length should be the same;
2) cross-section of 10 square millimeters and the following single-core power cord to hit the joint circle connection, the direction of the wire bending should be the same as the direction of the screws fastening, and the conductor and the nuts Between the installation of washers, each terminal allows up to two core wires, and in the two core wires between the installation of washers, all wiring screws should be tightened;
3) cross-section of 10 square millimeters and above the multi-stranded power cord should be installed with a copper nose, whose dimensions should be matched with the conductor;
4) the contact part of the wire nose and the equipment should be smooth and clean; contact with the coating of a thin layer of neutral Vantulin, installation of a flat and straight The screws are tightened;
5) When the power cord is connected to the terminal of the equipment, the terminal should not be subjected to mechanical stress.
6.9 power check
1) power line deployment is completed, in the relative humidity is not greater than 80%, with a 500-volt megohm meter to test the insulation resistance between the lines and to the ground should be greater than 1 megohm.
2) test the voltage drop of the power line should be in accordance with the design provisions.
3) 1 hour after power on to check the power cord nose, power cord connection, power cord and equipment connection temperature should not be greater than 65 degrees.
7, grounding device
7.1 pre-construction inspection
1) according to the design of the location of the ground line to verify that there is no overlap with the underground obstacles, cross, etc.;
2) the specifications of the main materials, quality, quantity should be able to meet the needs of construction.
7.2 laying grounding device
1) the location of the grounding device, the depth of the grounding body buried and grounding body and the size of the grounding wire should be in accordance with the design provisions. Flat steel joint lap length should be greater than twice the width; flat steel and flat steel or flat steel and ground body connection at least three sides of the full weld, welded firmly, welded joints coated with asphalt.
2) Introduce flat steel coated with asphalt and wrapped with burlap strips, then outside the burlap strips coated with asphalt to protect.
3) If there is a manhole device at the ground line lead-in line, the lead-in line should have a spare length in the manhole.
4) grounding device convergence equipment should be installed in accordance with the design provisions of the installation of square and firm and have obvious signs.
5) grounding device should be handled according to the hidden works, before returning to the soil should be in accordance with the representative of the construction unit **** with the test grounding resistance and both sides to sign, after passing the test before returning to the soil.
7.3 back to the earth
1) back to the earth, shall not be stones, messy bricks, garbage and other debris filled into the trench.
2) Back to the soil should be layered tamping, such as soil dry tamping should be watered.
7.4 new bureau (station) should be used joint grounding.
7.5 various types of communication bureaus (stations) joint grounding device grounding resistance value (provisional):