The overhead line wires erection
1 scope
The technology standard is applicable to 10 kv and below wire of overhead distribution line construction installation engineering.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials shall comply with the terms of home with the current technical standards, and shall have the manufacturer's certificate.
2.1.2 wire:
2.1.2.1 there should be no loose strands of the conductor, cross, folding, fracture and damage defects, such as naked aluminium conductor should not have serious corrosion phenomena.
2.1.2.2 should not have serious corrosion phenomena.
2.1.2.3 insulated wire table and should level off, smooth, colour and lustre is uniform, insulating layer thickness should comply with the rules. Insulation should be extruded close together, and easy to peel, insulated wire end should be sealed.
2.1.2.4 conductor minimum cross section should comply with the values shown in table 3-76.
Conductor minimum cross section (was) table 3-76
Wire type 10 kv
Residential area of residential areas below 1 kv
Aluminium conductor
Steel core aluminum stranded wire
Copper conductor, 35
25
16 to 25
16 and 25
16 16 to 25
16 and 25
3.2 ~ 4.0 mm in diameter
2.1.3 suspension insulator, butterfly insulator
2.1.3.1 porcelain and iron combination no askew phenomenon, and combine closely, galvanized iron well.
2.1.3.2 porcelain glaze is smooth, no cracks, lack of glaze, spots, burn mark and defects such as bubble or enamel burn out.
2.1.3.3 spring pin, the elastic cushion is suitable for.
2.1.3.4 ac withstand voltage test on high voltage insulator must conform to the norms of construction.
2.1.4 tie line: bare wire cable tie should be chosen with wire metal single strand, should not be less than 2.0 mm in diameter, insulated wires should choose insulation cable tie.
2.1.5 strain clamp, and groove clamp, pipe clamp pressure, aluminum belt
2.1.5.1 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.5.2 clamp flexible rotation, and wire interface meets the requirements.
2.1.5.3 bowl head hangs Taiwan, parallel hangs Taiwan, rectangular hangs Taiwan, u-shaped ring, ball lost ring type, drawing board, even pull, mat, etc.
2.1.5.4 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
Good 2.1.5.5 should be hot dip galvanized, galvanized, galvanized layer without peeling, corrosion phenomenon.
2.1.6 bolts:
2.1.6.1 bolt surface should not have crack, sand holes, zinc skin peeling and corrosion phenomena.
2.1.6.2 the matching of the screw and nut should be good, to increase the size of the internal thread with a coating of the external thread, the tolerance should be consistent with existing national standards "common thread 1 ~ 300 mm diameter tolerance of coarse thread level 3 standards.
2.1.6.3 bolt should have a locking device, locking device elastic should be appropriate, thickness should comply with the rules.
2.1.7 other materials: electric power compound, abrasive paper, paint, etc.
2.2 the main machine;
2.2.1 tightener, chain hoist, openings of pulleys, motorized, adjustable wrench, hydraulic pliers, hammer, hacksaw, inadvertently, fine steel wire brush, etc.
2.2.2 axes, iron wire, nylon rope size, ram, bamboo ladder, thermometer, telescope, climbers, seat belts, trolleys, etc.
2.3 operation conditions:
2.3.1 guy has been installed.
2.3.2 line obstacles on the processed, pay-off by other lines cross the line protection during the erection.
2.3.3 conductor cross section in 150 was above or line is longer, the line head end (tight) play tight line with anchor drill.
3 operation process
3.1 process:
Pay-off to tie tight line - insulator, took the lead, down lead
3.2 pay-off: will lead to the line head end (line), with a steel frame bobbin, then pay-off.
General steel has two ways: one way is to traverse along the pole roots after let go, then wires on the electric pole; Another method is a good opening roller at the cross arm, while taking in reverse wire condole is placed within the pulley forward.
3.2.1 the feeding process, appearance inspection should be made for wire should not be gall, broken strands, the phenomenon such as distortion, gold hook, beheaded. When the conductor in the following situation, corresponding measures should be taken.
3.2.1.1 when the conductor damage in the same place, at the same time meet the following conditions, the lesions should be sharp edges and burrs with 0 sand, can be mended:
A single strand damage depth of not less than 1/2 in diameter.
B steel core aluminum stranded wire and steel core aluminum stranded wire cross-sectional area below the conductive part of the cross-sectional area of 5%, and the strength loss is less than 4%.
C single metal wire damage area is less than 4%.
3.2.1.2 damage condition when the conductor in the same place more than the above range, shall be for the repair. The repair practice should comply with the construction and acceptance of norms.
3.2.2 lead straight to avoid joint, when the inevitable, joints shall meet the following requirements:
3.2.2.1 in the same way, the same joint on the wire should not be more than one. Wire connector position and distance should be greater than 0.5 m wire fixed place, when a shockproof device should be installed in earthquake outside.
3.2.2.2 different metals, different specifications, different direction of stranding wire are strictly prohibited within the block from the connection.
3.2.2.3 when wire winding method, the connection part of the wire strands should be good, should not have broken stocks, such problems as loose strands.
3.2.2.4 when using clamp pressure tube connecting wire surface shall be removed and the tube wall of dirt. Connection parts of the aluminum contact surface should be coated a layer of electricity compound, with fine steel wire brush to clean the surface oxidation film, retain paint, pressure welding. Pressure port number and the position and depth should comply with the rules.
3.2.2.5 below 1 kv lines using insulated wire erection, pay-off should not damage wire insulation layer and in the process of torsion, bending, etc.
Tight line 3.3:
3.3.1 wires in the end of the line card is fixed on the strain clamp or tied back on the butterfly insulator.
Bare aluminum wire clip on online or when it is fixed on the butterfly insulator, should be wrapped package aluminum belt, winding direction should be the same as that of the outer stranded wires, winding should be beyond the contact part of 30 mm length.
Bare aluminum wire binding on butterfly insulator length are shown in table 3-77.
Tie length value table 3-77
Conductor cross-section (was) tied to plunge into the length (mm)
LJ - 50, LGJ - 50, and the following
LJ - 70, 150
200
3.3.2 rainfall distribution on 10-12 lacing tie line, should choose the single strand with wire metal, its diameter should not less than 2 mm.
3.3.3 insulator installation shall meet the following requirements:
3.3.3.1 installation should be solid, reliable connection and prevent water.
3.3.3.2 when installation should be cleared surface gray scale, attachments, and should not have the coating.
3.3.3.3 insulator skirt edge and electric parts clearance should not be less than 50 mm.
3.3.4 suspension insulator installation, should also meet the following requirements:
3.3.4.1 and pole, wire hardware connection, no conformity phenomenon.
3.3.4.2 tension on the spring pin, bolt, and nail should be wear down.
3.3.4.3 hanging string on the spring pin, bolts and needle should be through to the electrical side. Two edges should be outside introversion, line should be from left to right through.
3.3.5 on head end bar, hang up tightener or tied down on the anchor chain. First two edges with human initial tension, and then use tightener or chain tight line. After observation has met the requirement of the wire sag, the wire card is fixed on the strain clamp or set on the butterfly insulator tied back (bare aluminum conductor shall be wrapped steel belt), finally, balance the tension on the other wire, pay attention to adjust the wire sag, and leveling.
3.3.5.1 wire after erection, lead to ground and cross cross distance, should comply with the design requirements.
3.3.5.2 wire tightly, sag error should not exceed 15% of the design sag. Each equal to the line sag in the class should be consistent, in meet the sag and the provisions of the permissible error and the relative error of sag, should not exceed 200 mm.
3.4 insulator binding: straight rod wire fixed banding on pin insulator, rod or intermediate rod should be by line Angle, then one by one to tie at both ends.
Tie pin type insulator shall meet the following requirements:
3.4.1 track line Angle bar wire should be fixed outer insulator Angle of the lateral grooves.
3.4.2 straight across the bar wire should use fixed double insulator, conductor should not appear in a fixed place of ontology Angle.
Rule 3.4.3 high-voltage lines straight rod wire should be fixed on the top of the pin insulator groove, and tied the double cross; Low voltage line straight rod wires can be fixed in the groove on the side of the pin insulator, can be tied to a single cross.
3.5 after taking the lead, set down lead: the tension bar, Angle bar, branch pole, pole terminal took the lead or down lead.
After taking the lead, take down lead shall meet the following requirements:
3.5.1 track of lead should be homogeneously radian, without hard curved; Add insulator when necessary.
3.5.2 took the lead, downlead, should be connected to the main line, with insulator shall not turn back tie together; Aluminum conductor connections between general and groove clamp should be adopted, but 70 was the following wire can be connected by binding, binding length should not be less than shown in table 3-78.
A wire tie length value table 3-78
Conductor cross section
(was) binding length
(mm) lead section
(was) binding length
(mm)
LJ - 35 and under
LJ - 50
LJ - 70, 150
200
TJ - 250 and the following 6
TJ - 25 ~ 35
TJ - 50 ~ 95, 100
150
200
Note: different cross-section wire connection, the tie with small cross-section wire length.
3.5.3 copper, aluminum wire connection transition should use copper and aluminum wire clip, or the transition of reliable measures.
3.5.4 10 kv line using transition and groove clamp connection wire, wire clip quantity should not be less than 2: junction surface should be smooth, bright and clean, conductor and and groove clamp slot should be removing oxidation film, with electricity compound.
2.6.2 l ~ 10 kv lines each phase lead, down lead to lead, downlead of adjacent phase or between wires, after installation clearance distance should be not less than 300 mm; 1 kv lines below should not be less than 150 mm.
3.6 line of wire and wire, electric pole or after installation clearance distance between architecture, l ~ 10 kv, should not be less than 200 mm; 1 kv, should not be less than 100 mm.
Below 3.7 1 kv lines using insulated wires, joint specification should be consistent with existing national regulation, and should be insulation bandaging.
3.8 overhead distribution lines of lightning protection and grounding should comply with the regulations of design and specification.
4 quality requirements
4.1 ensure projects:
4.4.1 hardware specifications, models, quality must meet the design requirements. Ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
Methods: to observe the inspection, pressure test record check factory certification and insulator.
High voltage porcelain surface is strictly forbidden to 4.1.2 defects such as cracks, defects, enamel burn out. Review the insulator of bearing bar.
Inspection method: to observe the inspection and check the installation records.
4.1.3 wire connection must be closely and firmly, joint are strictly forbidden to have to break and damage; Of wires in the pipe after the crimping or straightening crack in it is strictly prohibited.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 conductor and insulator fixed and reliable, and no broken wire strands, twisting and bending of death; Excessive wear of line and line segment with other defects repair intact.
Inspection method: to observe the inspection and check the installation records.
4.2.2 fuses, down lead wires and wire accords with a requirement of the minimum safety distance between; Wire layout reasonable, neat, line to line connection to clear, to identify the convenient.
Test method: observation or measurement inspection.
Holdings circuit grounding (zero) line equipped to reasonable, compact connection, strong, choose correct wire section, anticorrosive parts of the paint evenly without omission.
Inspection method: to observe the examination.
4.3 allowable deviation (table 3-79) of the project:
Wire sag allowable deviation table 3-79
Will project allowable deviation inspection method
1
Actual value is 2
Within the same wire sag difference between 5%
200 mm feet quantity check
5 finished product protection
5.1 wire in the feeding process, should prevent chafing, broken strands, the phenomenon such as twisting, bending.
5.2 wire after erection, such as construction site is more close, don't drop things online should be paid attention to the road.
5.3 distribution circuit in case of cross with other lines, must build the line frame, avoid friction and collision between the lines.
6 should pay attention to quality problems
6.1 pay-off, wire twisting, back button, broken stocks, chafing. Protective measures should be taken to protect good conductor.
6.2 wire after erection, sag error. Set up a wire, should pay attention to the temperature and the requirement of sag, careful observation and adjustment.
6.3 insulator tie is not correct, look back tie is not tight, length is not enough. Should be seriously tie, according to the requirement in the process of binding, often should use pliers to tighten cable tie.
7 quality records
7.1 wire, strain clamp and groove clamp, pipe clamp pressure, aluminum belt, all kinds of hardware such as hangs Taiwan should have product quality certificate.
7.2 suspension insulator, butterfly insulator due and product quality certificate, and the ac withstand voltage test report.
7.3 overhead line conductors construction project engineering, self-inspection record.
7.4 design changes regarding the record, record drawings.
7.5 overhead line and rod breakdown electric equipment installation engineering quality inspection records.
1 scope
The technology standard is applicable to 10 kv and below wire of overhead distribution line construction installation engineering.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials shall comply with the terms of home with the current technical standards, and shall have the manufacturer's certificate.
2.1.2 wire:
2.1.2.1 there should be no loose strands of the conductor, cross, folding, fracture and damage defects, such as naked aluminium conductor should not have serious corrosion phenomena.
2.1.2.2 should not have serious corrosion phenomena.
2.1.2.3 insulated wire table and should level off, smooth, colour and lustre is uniform, insulating layer thickness should comply with the rules. Insulation should be extruded close together, and easy to peel, insulated wire end should be sealed.
2.1.2.4 conductor minimum cross section should comply with the values shown in table 3-76.
Conductor minimum cross section (was) table 3-76
Wire type 10 kv
Residential area of residential areas below 1 kv
Aluminium conductor
Steel core aluminum stranded wire
Copper conductor, 35
25
16 to 25
16 and 25
16 16 to 25
16 and 25
3.2 ~ 4.0 mm in diameter
2.1.3 suspension insulator, butterfly insulator
2.1.3.1 porcelain and iron combination no askew phenomenon, and combine closely, galvanized iron well.
2.1.3.2 porcelain glaze is smooth, no cracks, lack of glaze, spots, burn mark and defects such as bubble or enamel burn out.
2.1.3.3 spring pin, the elastic cushion is suitable for.
2.1.3.4 ac withstand voltage test on high voltage insulator must conform to the norms of construction.
2.1.4 tie line: bare wire cable tie should be chosen with wire metal single strand, should not be less than 2.0 mm in diameter, insulated wires should choose insulation cable tie.
2.1.5 strain clamp, and groove clamp, pipe clamp pressure, aluminum belt
2.1.5.1 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
2.1.5.2 clamp flexible rotation, and wire interface meets the requirements.
2.1.5.3 bowl head hangs Taiwan, parallel hangs Taiwan, rectangular hangs Taiwan, u-shaped ring, ball lost ring type, drawing board, even pull, mat, etc.
2.1.5.4 surface should be smooth, no crack, burr, flash, sand holes, such as bubble defects.
Good 2.1.5.5 should be hot dip galvanized, galvanized, galvanized layer without peeling, corrosion phenomenon.
2.1.6 bolts:
2.1.6.1 bolt surface should not have crack, sand holes, zinc skin peeling and corrosion phenomena.
2.1.6.2 the matching of the screw and nut should be good, to increase the size of the internal thread with a coating of the external thread, the tolerance should be consistent with existing national standards "common thread 1 ~ 300 mm diameter tolerance of coarse thread level 3 standards.
2.1.6.3 bolt should have a locking device, locking device elastic should be appropriate, thickness should comply with the rules.
2.1.7 other materials: electric power compound, abrasive paper, paint, etc.
2.2 the main machine;
2.2.1 tightener, chain hoist, openings of pulleys, motorized, adjustable wrench, hydraulic pliers, hammer, hacksaw, inadvertently, fine steel wire brush, etc.
2.2.2 axes, iron wire, nylon rope size, ram, bamboo ladder, thermometer, telescope, climbers, seat belts, trolleys, etc.
2.3 operation conditions:
2.3.1 guy has been installed.
2.3.2 line obstacles on the processed, pay-off by other lines cross the line protection during the erection.
2.3.3 conductor cross section in 150 was above or line is longer, the line head end (tight) play tight line with anchor drill.
3 operation process
3.1 process:
Pay-off to tie tight line - insulator, took the lead, down lead
3.2 pay-off: will lead to the line head end (line), with a steel frame bobbin, then pay-off.
General steel has two ways: one way is to traverse along the pole roots after let go, then wires on the electric pole; Another method is a good opening roller at the cross arm, while taking in reverse wire condole is placed within the pulley forward.
3.2.1 the feeding process, appearance inspection should be made for wire should not be gall, broken strands, the phenomenon such as distortion, gold hook, beheaded. When the conductor in the following situation, corresponding measures should be taken.
3.2.1.1 when the conductor damage in the same place, at the same time meet the following conditions, the lesions should be sharp edges and burrs with 0 sand, can be mended:
A single strand damage depth of not less than 1/2 in diameter.
B steel core aluminum stranded wire and steel core aluminum stranded wire cross-sectional area below the conductive part of the cross-sectional area of 5%, and the strength loss is less than 4%.
C single metal wire damage area is less than 4%.
3.2.1.2 damage condition when the conductor in the same place more than the above range, shall be for the repair. The repair practice should comply with the construction and acceptance of norms.
3.2.2 lead straight to avoid joint, when the inevitable, joints shall meet the following requirements:
3.2.2.1 in the same way, the same joint on the wire should not be more than one. Wire connector position and distance should be greater than 0.5 m wire fixed place, when a shockproof device should be installed in earthquake outside.
3.2.2.2 different metals, different specifications, different direction of stranding wire are strictly prohibited within the block from the connection.
3.2.2.3 when wire winding method, the connection part of the wire strands should be good, should not have broken stocks, such problems as loose strands.
3.2.2.4 when using clamp pressure tube connecting wire surface shall be removed and the tube wall of dirt. Connection parts of the aluminum contact surface should be coated a layer of electricity compound, with fine steel wire brush to clean the surface oxidation film, retain paint, pressure welding. Pressure port number and the position and depth should comply with the rules.
3.2.2.5 below 1 kv lines using insulated wire erection, pay-off should not damage wire insulation layer and in the process of torsion, bending, etc.
Tight line 3.3:
3.3.1 wires in the end of the line card is fixed on the strain clamp or tied back on the butterfly insulator.
Bare aluminum wire clip on online or when it is fixed on the butterfly insulator, should be wrapped package aluminum belt, winding direction should be the same as that of the outer stranded wires, winding should be beyond the contact part of 30 mm length.
Bare aluminum wire binding on butterfly insulator length are shown in table 3-77.
Tie length value table 3-77
Conductor cross-section (was) tied to plunge into the length (mm)
LJ - 50, LGJ - 50, and the following
LJ - 70, 150
200
3.3.2 rainfall distribution on 10-12 lacing tie line, should choose the single strand with wire metal, its diameter should not less than 2 mm.
3.3.3 insulator installation shall meet the following requirements:
3.3.3.1 installation should be solid, reliable connection and prevent water.
3.3.3.2 when installation should be cleared surface gray scale, attachments, and should not have the coating.
3.3.3.3 insulator skirt edge and electric parts clearance should not be less than 50 mm.
3.3.4 suspension insulator installation, should also meet the following requirements:
3.3.4.1 and pole, wire hardware connection, no conformity phenomenon.
3.3.4.2 tension on the spring pin, bolt, and nail should be wear down.
3.3.4.3 hanging string on the spring pin, bolts and needle should be through to the electrical side. Two edges should be outside introversion, line should be from left to right through.
3.3.5 on head end bar, hang up tightener or tied down on the anchor chain. First two edges with human initial tension, and then use tightener or chain tight line. After observation has met the requirement of the wire sag, the wire card is fixed on the strain clamp or set on the butterfly insulator tied back (bare aluminum conductor shall be wrapped steel belt), finally, balance the tension on the other wire, pay attention to adjust the wire sag, and leveling.
3.3.5.1 wire after erection, lead to ground and cross cross distance, should comply with the design requirements.
3.3.5.2 wire tightly, sag error should not exceed 15% of the design sag. Each equal to the line sag in the class should be consistent, in meet the sag and the provisions of the permissible error and the relative error of sag, should not exceed 200 mm.
3.4 insulator binding: straight rod wire fixed banding on pin insulator, rod or intermediate rod should be by line Angle, then one by one to tie at both ends.
Tie pin type insulator shall meet the following requirements:
3.4.1 track line Angle bar wire should be fixed outer insulator Angle of the lateral grooves.
3.4.2 straight across the bar wire should use fixed double insulator, conductor should not appear in a fixed place of ontology Angle.
Rule 3.4.3 high-voltage lines straight rod wire should be fixed on the top of the pin insulator groove, and tied the double cross; Low voltage line straight rod wires can be fixed in the groove on the side of the pin insulator, can be tied to a single cross.
3.5 after taking the lead, set down lead: the tension bar, Angle bar, branch pole, pole terminal took the lead or down lead.
After taking the lead, take down lead shall meet the following requirements:
3.5.1 track of lead should be homogeneously radian, without hard curved; Add insulator when necessary.
3.5.2 took the lead, downlead, should be connected to the main line, with insulator shall not turn back tie together; Aluminum conductor connections between general and groove clamp should be adopted, but 70 was the following wire can be connected by binding, binding length should not be less than shown in table 3-78.
A wire tie length value table 3-78
Conductor cross section
(was) binding length
(mm) lead section
(was) binding length
(mm)
LJ - 35 and under
LJ - 50
LJ - 70, 150
200
TJ - 250 and the following 6
TJ - 25 ~ 35
TJ - 50 ~ 95, 100
150
200
Note: different cross-section wire connection, the tie with small cross-section wire length.
3.5.3 copper, aluminum wire connection transition should use copper and aluminum wire clip, or the transition of reliable measures.
3.5.4 10 kv line using transition and groove clamp connection wire, wire clip quantity should not be less than 2: junction surface should be smooth, bright and clean, conductor and and groove clamp slot should be removing oxidation film, with electricity compound.
2.6.2 l ~ 10 kv lines each phase lead, down lead to lead, downlead of adjacent phase or between wires, after installation clearance distance should be not less than 300 mm; 1 kv lines below should not be less than 150 mm.
3.6 line of wire and wire, electric pole or after installation clearance distance between architecture, l ~ 10 kv, should not be less than 200 mm; 1 kv, should not be less than 100 mm.
Below 3.7 1 kv lines using insulated wires, joint specification should be consistent with existing national regulation, and should be insulation bandaging.
3.8 overhead distribution lines of lightning protection and grounding should comply with the regulations of design and specification.
4 quality requirements
4.1 ensure projects:
4.4.1 hardware specifications, models, quality must meet the design requirements. Ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
Methods: to observe the inspection, pressure test record check factory certification and insulator.
High voltage porcelain surface is strictly forbidden to 4.1.2 defects such as cracks, defects, enamel burn out. Review the insulator of bearing bar.
Inspection method: to observe the inspection and check the installation records.
4.1.3 wire connection must be closely and firmly, joint are strictly forbidden to have to break and damage; Of wires in the pipe after the crimping or straightening crack in it is strictly prohibited.
Inspection method: to observe the inspection and check the installation records.
4.2 the basic items:
2 conductor and insulator fixed and reliable, and no broken wire strands, twisting and bending of death; Excessive wear of line and line segment with other defects repair intact.
Inspection method: to observe the inspection and check the installation records.
4.2.2 fuses, down lead wires and wire accords with a requirement of the minimum safety distance between; Wire layout reasonable, neat, line to line connection to clear, to identify the convenient.
Test method: observation or measurement inspection.
Holdings circuit grounding (zero) line equipped to reasonable, compact connection, strong, choose correct wire section, anticorrosive parts of the paint evenly without omission.
Inspection method: to observe the examination.
4.3 allowable deviation (table 3-79) of the project:
Wire sag allowable deviation table 3-79
Will project allowable deviation inspection method
1
Actual value is 2
Within the same wire sag difference between 5%
200 mm feet quantity check
5 finished product protection
5.1 wire in the feeding process, should prevent chafing, broken strands, the phenomenon such as twisting, bending.
5.2 wire after erection, such as construction site is more close, don't drop things online should be paid attention to the road.
5.3 distribution circuit in case of cross with other lines, must build the line frame, avoid friction and collision between the lines.
6 should pay attention to quality problems
6.1 pay-off, wire twisting, back button, broken stocks, chafing. Protective measures should be taken to protect good conductor.
6.2 wire after erection, sag error. Set up a wire, should pay attention to the temperature and the requirement of sag, careful observation and adjustment.
6.3 insulator tie is not correct, look back tie is not tight, length is not enough. Should be seriously tie, according to the requirement in the process of binding, often should use pliers to tighten cable tie.
7 quality records
7.1 wire, strain clamp and groove clamp, pipe clamp pressure, aluminum belt, all kinds of hardware such as hangs Taiwan should have product quality certificate.
7.2 suspension insulator, butterfly insulator due and product quality certificate, and the ac withstand voltage test report.
7.3 overhead line conductors construction project engineering, self-inspection record.
7.4 design changes regarding the record, record drawings.
7.5 overhead line and rod breakdown electric equipment installation engineering quality inspection records.
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