Answer the door line installation of overhead line
1 scope
This process is suitable for below 1 kv overhead distribution lines from the pole to building external wall of the first support line installation project.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials should comply with the regulations of the state technical standards on the current, and shall have the quality certificate.
2.1.2 insulated wires:
2.1.2.1 should not be twisted, bent, broken and damaged the death of defects.
2.1.2.2 minimum wire section should not be less than: copper wire was a 4; Aluminum conductor is a - 10 was; Rated voltage should be not less than 450 v / 750 v.
2.1.3 Angle steel, round steel:
Cross arm, support the use of Angle steel specifications should not be less than 50 * 50 * 5, TAB using the round steel specifications shall not be less than phi 12.
2.1.4 and groove clamp, the clamp pressure pipe:
1. The surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.5 clamp and wire interface should comply with the requirements.
2.1.6 pull type cushion plate, music:
2.1.6.1 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.6.2 should be hot dip galvanized, zinc in case of partial skin peeled, should besmear after derusting red ZhangDan and paint.
2.1.6.3 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.7 bolt
2.1.7.1 bolt surface should not have crack, sand holes, zinc skin peeling and corrosion phenomena, such as screw and nut should cooperate well.
2.1.7.2 the various coupling bolts should be locking device on the hardware, the locking device shall be galvanized, good elasticity, thickness of the right within the rules.
2.1.8 other materials: rubber waterproof elbow, insulation cable tie, cloth, and black tape, cement, sand, anticorrosive paint, etc.
2.2 the main equipment:
2.2.1 bench drill, bench clamp, hydraulic pliers, welding machine, hammer and chisel, hacksaw, adjustable wrench.
2.2.2 box feet, feet, steel ruler, ash bucket, grey shovel, bucket, climbers, seat belts and high stool, etc.
2.3 operation conditions:
2.3.1 overhead distribution lines and the structure of the power supply into the household plumbing installation is complete.
2.3.2 frame construction work outside has been demolished.
3 operation process
3.1 process:
Cross arm, support production, installation and erection - wire connection
Cross arm, support production, installation of 3.2:
3.2.1 cross arm, support production: according to the way into the line determine the type of cross arm, support, after calculating length of Angle steel, sawing. Draw lines to simmer Angle and hole, hole, according to simmer horn line saw the gouges where whole pieces were missing, caught in the vise on heat type. Then counterpart seam welded gouges where whole pieces were missing. Using buried note fixed cross arm, support and bolt, buried note side should make a dovetail TAB. Finally, the cross arm, support after cleaning brush anti-rust paint, grey paint along two (embedded brick wall only brush anti-rust paint).
3.2.2 cross arm, support installation: after waiting for paint dry root bear, stents, buried note, fixed. When the cross arm, bracket is brick wall, embedded advisable to over the wall.
Meet the household 3.2.2.1 line into the door end fixed point to ground distance should not be less than 2.7 m, and meet the household should satisfy line under the condition of maximum sag, the vertical distance to the center of the road should be not less than the following provisions:
Traffic street: 6 m;
Traffic difficult street, alley: 3 m.
3.2.2.2 embedment depth of the cross arm, support shall be determined according to the stress distribution, but should not be less than 120 mm; Using bolt should not be less than M12; Note with high strength cement mortar.
Meet the household 3.2.2.3 line pole cross arm should be installed in the next layer below the line.
3.3 answer the door line construction shall meet the following requirements:
Meet the household 3.3.1 line set up, in the biggest swing, should not have contact with the trees and other buildings.
There should be no joint in 3.3.2 rainfall distribution on 10-12 span.
3.3.3 should not through between high voltage fuses, should not cross the railway.
We meet the household introduced two different power supply line is unfavorable with stem erect.
Meet the household 3.4 wire fixed end using bound and fixed, the binding length should comply with the values shown in table 3-80.
Tie length table 3-80
Conductor cross-section (was) binding length (mm) lead section (was) binding length (mm)
10 and the following
16 and the following > 50
> 80 25 ~ 50
70 ~ 120 > 120
> 200
3.5 the door line and device of lightning protection and grounding should meet the design requirements.
3.6 wire connection: first measured the length of the wire, cut wire core, to find, after the phase sequence of wire connection. Then joints with rubber cloth and black tape wrap half range overlap each layer. Finally, tidy up "one word" type connector, make neat rows.
3.6.1 track meet and into the structure of the wire should be adopted in the first support the "one word" joint type, general connection method is as follows:
3.6.1.1 aluminum wires can be used between the clamp pressure pipe pressure;
3.6.1.2 copper wires can be used between the coil after soldering;
3.6.1.3 between copper and aluminum wire steel wire can be after rinse tin on the aluminium wire winding.
3.6.2 pick up and the dominant lines on the pole and groove clamp should be used to connect; Copper, aluminum wire should be used between the transition of copper and aluminum wire clip.
4 quality standards
4.1 ensure projects:
Hardware specifications, models, quality must meet the design requirements. Wire connection must be closely and firmly, joint are strictly forbidden to have broken stocks and injury.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 black metal anti-corrosion protection complete hardware parts.
Inspection method: to observe the examination.
4.2.2 cross arm, stents, insulator installation should level off, firm.
Test method: observation, the lever to check.
Holdings conductor and insulator fixed reliable, no broken wire strands of bending, twisting, and death.
Inspection method: to observe the inspection and check the installation records.
4.2.4 between conductor and wire of the minimum safety distance between conform to the requirements of the construction specifications.
Test method: observation or measurement inspection.
4.2.5 earthing wire routing to reasonable, compact connection, strong, choose correct ground wire section, anticorrosive parts of the paint evenly without omission, and do not pollute the building after painting.
Inspection method: to observe the examination.
5 finished product protection
5.1 cross arm, support buried after injection should be avoided to hit.
Should be paid attention to meet the household 5.2 line installed, don't throw things down from a high-level, so as not to break bad conductor and insulator.
5.3 electrical installation construction, attention should be paid to avoid damage or contamination buildings.
6 should pay attention to quality problems
6.1 cross arm, support uneven, fixed unstable. Buried on the cross arm, bracket, leveling carefully, cement mortar should be full.
Meet the household 6.2 line protection and electric tube into the homes of distance is too large or too small, the location is not corresponding. Into the door wire and pipe installation position should be buried with the cross arm, support type and note position into account.
7 quality records
7.1 insulation wire, and wire clip, clamp pressure pipe type, drawing board, MATS and other hardware product factory qualified certification.
7.2 overhead line by line installation project engineering, self-inspection record.
7.3 design changes regarding the record, record drawings.
1 scope
This process is suitable for below 1 kv overhead distribution lines from the pole to building external wall of the first support line installation project.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials should comply with the regulations of the state technical standards on the current, and shall have the quality certificate.
2.1.2 insulated wires:
2.1.2.1 should not be twisted, bent, broken and damaged the death of defects.
2.1.2.2 minimum wire section should not be less than: copper wire was a 4; Aluminum conductor is a - 10 was; Rated voltage should be not less than 450 v / 750 v.
2.1.3 Angle steel, round steel:
Cross arm, support the use of Angle steel specifications should not be less than 50 * 50 * 5, TAB using the round steel specifications shall not be less than phi 12.
2.1.4 and groove clamp, the clamp pressure pipe:
1. The surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.5 clamp and wire interface should comply with the requirements.
2.1.6 pull type cushion plate, music:
2.1.6.1 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.6.2 should be hot dip galvanized, zinc in case of partial skin peeled, should besmear after derusting red ZhangDan and paint.
2.1.6.3 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.7 bolt
2.1.7.1 bolt surface should not have crack, sand holes, zinc skin peeling and corrosion phenomena, such as screw and nut should cooperate well.
2.1.7.2 the various coupling bolts should be locking device on the hardware, the locking device shall be galvanized, good elasticity, thickness of the right within the rules.
2.1.8 other materials: rubber waterproof elbow, insulation cable tie, cloth, and black tape, cement, sand, anticorrosive paint, etc.
2.2 the main equipment:
2.2.1 bench drill, bench clamp, hydraulic pliers, welding machine, hammer and chisel, hacksaw, adjustable wrench.
2.2.2 box feet, feet, steel ruler, ash bucket, grey shovel, bucket, climbers, seat belts and high stool, etc.
2.3 operation conditions:
2.3.1 overhead distribution lines and the structure of the power supply into the household plumbing installation is complete.
2.3.2 frame construction work outside has been demolished.
3 operation process
3.1 process:
Cross arm, support production, installation and erection - wire connection
Cross arm, support production, installation of 3.2:
3.2.1 cross arm, support production: according to the way into the line determine the type of cross arm, support, after calculating length of Angle steel, sawing. Draw lines to simmer Angle and hole, hole, according to simmer horn line saw the gouges where whole pieces were missing, caught in the vise on heat type. Then counterpart seam welded gouges where whole pieces were missing. Using buried note fixed cross arm, support and bolt, buried note side should make a dovetail TAB. Finally, the cross arm, support after cleaning brush anti-rust paint, grey paint along two (embedded brick wall only brush anti-rust paint).
3.2.2 cross arm, support installation: after waiting for paint dry root bear, stents, buried note, fixed. When the cross arm, bracket is brick wall, embedded advisable to over the wall.
Meet the household 3.2.2.1 line into the door end fixed point to ground distance should not be less than 2.7 m, and meet the household should satisfy line under the condition of maximum sag, the vertical distance to the center of the road should be not less than the following provisions:
Traffic street: 6 m;
Traffic difficult street, alley: 3 m.
3.2.2.2 embedment depth of the cross arm, support shall be determined according to the stress distribution, but should not be less than 120 mm; Using bolt should not be less than M12; Note with high strength cement mortar.
Meet the household 3.2.2.3 line pole cross arm should be installed in the next layer below the line.
3.3 answer the door line construction shall meet the following requirements:
Meet the household 3.3.1 line set up, in the biggest swing, should not have contact with the trees and other buildings.
There should be no joint in 3.3.2 rainfall distribution on 10-12 span.
3.3.3 should not through between high voltage fuses, should not cross the railway.
We meet the household introduced two different power supply line is unfavorable with stem erect.
Meet the household 3.4 wire fixed end using bound and fixed, the binding length should comply with the values shown in table 3-80.
Tie length table 3-80
Conductor cross-section (was) binding length (mm) lead section (was) binding length (mm)
10 and the following
16 and the following > 50
> 80 25 ~ 50
70 ~ 120 > 120
> 200
3.5 the door line and device of lightning protection and grounding should meet the design requirements.
3.6 wire connection: first measured the length of the wire, cut wire core, to find, after the phase sequence of wire connection. Then joints with rubber cloth and black tape wrap half range overlap each layer. Finally, tidy up "one word" type connector, make neat rows.
3.6.1 track meet and into the structure of the wire should be adopted in the first support the "one word" joint type, general connection method is as follows:
3.6.1.1 aluminum wires can be used between the clamp pressure pipe pressure;
3.6.1.2 copper wires can be used between the coil after soldering;
3.6.1.3 between copper and aluminum wire steel wire can be after rinse tin on the aluminium wire winding.
3.6.2 pick up and the dominant lines on the pole and groove clamp should be used to connect; Copper, aluminum wire should be used between the transition of copper and aluminum wire clip.
4 quality standards
4.1 ensure projects:
Hardware specifications, models, quality must meet the design requirements. Wire connection must be closely and firmly, joint are strictly forbidden to have broken stocks and injury.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 black metal anti-corrosion protection complete hardware parts.
Inspection method: to observe the examination.
4.2.2 cross arm, stents, insulator installation should level off, firm.
Test method: observation, the lever to check.
Holdings conductor and insulator fixed reliable, no broken wire strands of bending, twisting, and death.
Inspection method: to observe the inspection and check the installation records.
4.2.4 between conductor and wire of the minimum safety distance between conform to the requirements of the construction specifications.
Test method: observation or measurement inspection.
4.2.5 earthing wire routing to reasonable, compact connection, strong, choose correct ground wire section, anticorrosive parts of the paint evenly without omission, and do not pollute the building after painting.
Inspection method: to observe the examination.
5 finished product protection
5.1 cross arm, support buried after injection should be avoided to hit.
Should be paid attention to meet the household 5.2 line installed, don't throw things down from a high-level, so as not to break bad conductor and insulator.
5.3 electrical installation construction, attention should be paid to avoid damage or contamination buildings.
6 should pay attention to quality problems
6.1 cross arm, support uneven, fixed unstable. Buried on the cross arm, bracket, leveling carefully, cement mortar should be full.
Meet the household 6.2 line protection and electric tube into the homes of distance is too large or too small, the location is not corresponding. Into the door wire and pipe installation position should be buried with the cross arm, support type and note position into account.
7 quality records
7.1 insulation wire, and wire clip, clamp pressure pipe type, drawing board, MATS and other hardware product factory qualified certification.
7.2 overhead line by line installation project engineering, self-inspection record.
7.3 design changes regarding the record, record drawings.
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