Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 6758-1993
Paper Insulated Enameled Transposed Conductor
Published on August 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on October 1, 1993
Mechanical Industry Standard of the People's Republic of China
Paper Insulated Enameled Transposed Conductor
Subject Content and Applicable Scope
JB/T6758-1993
This standard specifies the model, specification, technical requirements, test methods, inspection rules and packaging marks of paper insulated enameled transposed conductor. This standard is applicable to paper-insulated enameled transposed conductor (referred to as transposed conductor) formed by transposing acetal enameled copper rectangular wire with the outer layer wrapped with insulating paper. The transposed conductor is used to manufacture oil-immersed transformers or other electrical windings. Cited standards
GB7095
GB7969
GB10334
GB4005
GB/T3048.14
ZBY32020
ZBY32018
3 Terms, codes and symbols
3.1 Terms
3.1.1 Transposed conductor
Enameled fan winding wire
Power cable paper|| tt||Telephone paper
Wire and cable delivery tray
Wire and cable DC voltage test method
500kV transformer spacing insulation paper
110~330kV high-voltage cable paper
Refers to a winding wire that is composed of a certain number of enameled copper flat wires or enameled aluminum flat wires into two rows with wide faces touching each other, and the same direction of transposition is made along the narrow face above and below the two rows of enameled fan wires as required, and the electrical insulating paper tape is used to make multiple layers of continuous and tight wrapping. 3.1.2 Transposition pitch
The quotient of the axial length of a certain enameled flat wire in the transposed conductor after a complete transposition cycle and the number of enameled fan wires that make up the transposed conductor, that is, the axial length between the starting points of two adjacent transpositions. 3.1.3 Overlapping wrapping
The wrapping form in which the edges of adjacent paper tapes of the same wrapping layer are pressed against each other. 3.1.4 Overlap width
The width of the overlapping part of the paper tape edge during overlapping wrapping. 3.1.5 Spacing wrapping
The wrapping form in which the edges of adjacent paper tapes of the same wrapping layer do not overlap each other but leave a certain spacing. 3.1.6 Spacing width
The distance between the edges of adjacent paper tapes of the same wrapping layer during spacing wrapping. 3.1.7 Gap overlap
The overlap of the gaps of adjacent wrapping layers during gap wrapping. 3.1.8 Transposed core
The combination of enameled fan wires after transposition.
.3.2 Code
Approved by the Ministry of Machinery Industry on August 21, 1993
Implemented on October 1, 1993
3.2.1 Series code
Transposed conductor
3.2.2 Material code
Insulating paper
Acetal enameled copper rectangular wire
Other materials
3.3 Symbol
QQB (B can be omitted)
JB/T 6758-1993
The dimension symbols of the transposed conductor are shown in the figure, where: H,-height of the transposed conductor, mm;
W,-width of the transposed conductor, mm
H,-height of the transposed wire core, mm;
W,-width of the transposed wire core, mm;
A-narrow side dimension of the enameled flat wire, mm;
-wide side dimension of the fan wire, mm;
-maximum overall dimension of the narrow side of the enameled fan wire, mm: Aar
-maximum overall dimension of the wide side of the enameled fan wire , mm; nominal size of narrow side of enameled fan wire conductor, mm; b--nominal size of wide side of enameled fan wire conductor, mmt---allowable deviation of enameled starter wire conductor, mni; 8--paint film thickness of enameled flat wire, mm;
△--the sum of paper insulation thickness on both sides of the wire core, mm; Anax
the maximum value of the sum of paper insulation thickness on both sides of a wire core, mm: C. Middle lining paper thickness, mm
C Middle paper width, mm;
K-correction value of transposed conductor height, mm;
K. Transposed conductor height calculation parameters, mm; n--the number of transposed enameled flat wires;
S-transposition pitch.
3.4 Model
The model of paper insulated acetal enameled transposed conductor is HZQQ. CA
3.5 Product representation method
JB/T6758-1993
3.5.1 Products are represented by model, specification, number of wires, nominal thickness of paper insulation and number of this standard. 3.5.2 Example
The conductor specification of sock-wrapped flat wire is a×b, 1.60mm×6.30mm, the number of enameled flat wires is 17, and the paper insulation nominal thickness is 1.35mm. The paper insulation acetal enameled transposed conductor is represented as: HZQQ
4 Technical requirements
4.1 Materials
1.60×6.30×17-1.35
4.1.1 Enameled copper fan wire
Paint film thickness: Level 1
Width-to-thickness ratio: 2≤6/a5
Other properties shall comply with the corresponding provisions of GB7G95. The thickness of the second-level paint film is under consideration.
4.1.2 Insulation paper
JB 6758-93
The power seam paper, telephone paper, 500kV transformer inter-turn insulation paper and 110~330kV high-voltage cable paper for transposed conductors shall comply with the provisions of GB7969, GB10334, ZBY32020 and ZBY32018 respectively. The thickness of the insulation paper for transposed conductors shall be within the range of 0.045~0.13mm, and the intermediate lining paper shall use power cable paper with a nominal thickness of 0.13mm.
4.1.3 Other materials and technical requirements are to be determined. 4.2 Structure
4.2.1 The size of the enameled flat wire shall comply with the provisions of Articles 7 and 8 of GB7095.1. 4.2.2 The number of enameled flat wires in the transposed conductor shall be an odd number of 5~41. 4.2.3 The external dimensions of the transposed wire core are as follows: W, ≤28mm
H, ≤65mm
4.2.4 When the height dimension H of the transposed wire core is 10mm or above, a layer of cable paper with a nominal thickness of 0.13mm should be added between the two rows of enameled flat wires. The lining paper width C is calculated according to formula 1, nl×Aa
The allowable deviation is ±1mm.
4.2.5 The transposition pitch should not exceed 6 yuanb, and the specific pitch value shall be determined by negotiation between the supply and demand parties. 4.2.6 The enameled flat wire after transposition shall not have any defects that affect the performance. 4.2.7 Even-numbered columns are under consideration.
4.3 Insulation
4.3.1 The nominal thickness and allowable deviation of the transposed conductor paper insulation shall comply with the provisions of Table 1. 3
Nominal insulation thickness
0.45,0.60
0.75,0.95
1.20,1.35,1.60,1.95
2.45, 2.95
3. 15, 3. 55,4. 00
JB/T67581993
Allow deviation
4.3.2 The paper insulation layer of the transposed conductor shall be wrapped with a blue layer or above of paper tape. The structural composition of the paper tape is generally determined by the manufacturer. When the user proposes the number of wrapping layers and the thickness of each layer of paper, the thickness deviation of the paper insulation layer and the maximum overall dimensions are allowed to be negotiated between the supply and demand parties. 4.3.3 The paper tape should be wrapped tightly, evenly and smoothly on the transposed core. The paper tape should not be missing layers, wrinkled or cracked, and the overlapping paper tape should not be exposed.
4.4 Wrapping method
4.4.1 Each layer of insulation paper is generally wrapped in a double-layer manner. The overlapping width of the paper tape should not be less than 2mm. The overlapping parts of the adjacent two layers of paper should be evenly staggered. The width of the paper tape should not exceed 1.5 times the sum of the transposed core H, and W, and its maximum width is 35mm. 4.4.2 According to user requirements, part or all of the gap wrapping can be used in the middle instead of overlapping wrapping. The gap width should not be greater than 2mm, and the gaps should be evenly staggered. The number of gap overlaps should not exceed 1 time every 8 layers. 4.4.3 Wrapping direction
4.4.3.1 When each layer is wrapped in an overlapping manner, wrapping in different directions is allowed. 4.4.3.2 When wrapping in gaps, wrapping should be done in the same direction, but the number of paper layers should not exceed 8. If it exceeds 8 layers, the wrapping direction should be changed. 4.4.4 Paper tape joints or repairs are allowed, and the size of the repaired area should not exceed the maximum outer dimensions of the finished product. 4.5 The maximum dimension of the transposed conductor Hz, Wm should not be greater than the value calculated by formula 2 and formula 3 (mm). Himte
(a+a+m)+x+K
(Ax)+Am+K
W22(b+a+mx)+x+C,
=2 Bmx+n+0. 13
When H,<10mm, C,=0
When H,≥10mm, C,=0.13
△ is the maximum thickness of the paper insulation layer.
When the maximum dimension of the transposed conductor does not exceed Hmx and W2mz, the positive deviation of its insulation thickness is allowed to exceed the provisions of Table 1. K value calculation,
aK. Value
When a≤2.00mm, K=0.5mm
When a>2.00mm, K. =0.8mm
When a≤2.0mm, K=K+×0.04=0.52+0.02n2
When a>2.00mm, K=1.5K,+x0.04=1.22+0.02n2
When 812
a≤2.00mm, K=0.5K.+1
X0.04=0.27+0.02n
JB/T6758-1993
When a>2.00mm, K=K+×0.04=0.82+0.02n2
4.6 Welding
Welding of the enameled flat wire in the transposed conductor is allowed, and the welding point should be firm and reliable. The distance between the welding points of two adjacent enameled flat wires shall be no less than 500mm. The welding points shall be repaired, and the size after repair shall not be less than the nominal size of the conductor, and the positive deviation shall not be greater than 2 times the specified deviation. Heat-resistant electrical latex glue shall be applied to the welding points and the conductors without paint film, and a layer of insulating paper with a thickness of not less than 0.075mm shall be wrapped, and the overlapping width shall be 40% to 55% of the width of the paper tape. The welding points shall be clearly marked in a way that has no effect on the performance. 4.7 Withstand voltage
The adjacent enameled fan wires in the transposed conductor shall be subjected to a DC 500V voltage test, and no breakdown shall occur during the test. 4.8 Wire path
When a single enameled flat wire in the transposed conductor is measured with a multimeter, there shall be no circuit breakage. 4.9 Delivery length
The delivery reel specifications and delivery length shall be specified according to the agreement between the supply and demand parties. The error shall not exceed 0.5%. 5 Test method
5.1 Dimension measurement
5.1.1 Measurement of paper insulation thickness of transposed conductor
On a sample with a length of not less than 300mm, cut at least 100mm of insulation layer with a sharp blade, remove the transposed wire core without affecting the position of the paper insulation layers, and flatten the paper insulation sleeve, then measure the thickness △ of the paper insulation layer with a precision of not less than 0.01mm, a measuring pressure of 75~125Pa, and a measuring rod and a measuring seat diameter of 5~8mm. Measure three points and take the average value as the measurement result. 5.1.2 Measurement of external dimensions of transposed conductor
Take a straight sample with a length of about 1000mm, and measure the height H and width W of the sample at three locations at least 100mm apart with a measuring tool that meets the requirements of Article 5.1.1, and take the average value of the three measured values as the measurement result. 5.1.3 Transposition pitch measurement
Remove a sufficient length of paper insulation layer at one end of the entire transposition conductor, and then use a steel tape measure with an accuracy of 1mm to continuously measure 5 transposition pitches, and take the average value, accurate to 1mm. 5.1.4 Gap width and overlap width measurement
Take a sample of about 500mm in length, and use a vernier caliper with an accuracy of not less than 0.1mm to directly measure the gap width or overlap width of the wrapping layer layer by layer, and measure each layer accurately to 1mm. 5.2 DC voltage resistance test
5.2.1 The test voltage is 500V DC, and the ripple factor is not more than 5%. 5.2.2 The test equipment consists of components such as a transformer of not less than 500VA, a rectifier element, a filter capacitor, a voltmeter, a breakdown indicator, and connecting wires. The test equipment should comply with the relevant provisions of GB3048.15, and when the breakdown current is greater than or equal to 20mA, the equipment should indicate a breakdown.
5.2.3 Apply 500V DC voltage between adjacent enameled fan wires at one end of the whole reel of transposed conductor for not less than 5s, and no breakdown should occur between the wires. Measure two adjacent enameled braided wires in turn according to the above method until all enameled flat wires are measured. 5.3 Wire Path Test
Select the multimeter selector switch to the ×1 or ×10 position within the resistance "0" range, adjust the pointer scale, and then use the measuring rod to measure the two ends of the same enameled shoulder wire of the transposed conductor in turn until all enameled flat wires are measured. 5.4 Delivery Length.
The length is measured with a meter.
Inspection Rules
JB/T6758-1993
The product shall be inspected and qualified by the technical inspection department of the manufacturer before it can be shipped, and the shipped product shall be accompanied by a product quality certificate. 6.1
The product shall be inspected according to the provisions of Table 2.
1 Size
Project name
Acetal enameled steel flat wire size
Number and thickness of paper insulation layers
Width and thickness of intermediate lining paper
Overall dimensions of transposed conductor
Transposition of ball-wrapped fan wire
Transposition pitch
Appearance and defects of transposed wire core
Wrapping quality
Gap width, overlapping width
Wrapping method and direction
DC voltage withstand test
Conductor passage test
Delivery length|| tt||8 Packaging
Technical requirements
Comply with Article 4.2.1 of this standard
Comply with Article 4.3.1 and 4.3.2 of this standardComply with Article 4.2.4 of this standard
Comply with Article 4.5 of this standard
Comply with Article 4.2.5 of this standard
Comply with Article 4.2.6 of this standard
Comply with Article 4.3.3 of this standard
Comply with Article 4.4.1 and 4.4.2 of this standardComply with Article 4. Article 4.3
Comply with Article 4.6 of this standard
Comply with Article 4.7 of this standard
Comply with Article 4.8 of this standard
Comply with Article 4.9 of this standard
Comply with Article 7.1 of this standard
Test type
Test method
Article 5.1.1 of this standard
Measured with a steel ruler with an accuracy of 1mm
Article 5.1.2 of this standard
Article 5.1.3 of this standard
Correct Regular vision check
Normal vision check
Article 5.1.4 of this standard
Normal vision check
Normal vision check, micrometer and steel tape with an accuracy of 0.01mm
Article 5.2 of this standard
Article 5.3 of this standard
Article 5.4 of this standard
Direct measurement and normal vision check
6.3 For random inspection items, if the first test fails, double sampling shall be conducted for the second test. If it still fails, 100% test shall be conducted. If the user does not make any requirements, the sampling quantity for each batch shall be 10%, but shall not be less than 2 plates. 6.4
Packaging, marking
7.1 Packaging
7.1.1 The transposed conductors shall be delivered in drums. The finished products shall be tightly, evenly and neatly wound on the drums. Each layer shall be separated by a whole sheet of cable paper. The distance from the outermost layer to the edge of the drum shall not be less than 30mm. 7.1.2 The drums containing the finished products shall be wrapped with moisture-proof and anti-ballast magnetic materials. Both ends of the transposed conductors shall be fastened to the drums. Only one wire segment is allowed for each drum of finished products.
7.2 Marking
Each drum of finished products shall be attached with a label indicating:
Manufacturer name, trademark or certification mark;
Product model, specification, number of roots, nominal thickness of paper insulation and standard number; product dimensions and transposition pitch;
Length,
Net weight and gross weight (kg);
Manufacture date.
JB/T6758-1993
Heat-resistant electrical latex glue
(Supplement)
The performance of heat-resistant electrical latex glue for transposed conductors shall comply with the provisions of Table A1. Table A1
Content of surrounding components
3. Viscosity (rotational type 20±0.5C)
5. Ash content
6. Bonding strength (normal state)
7. Bonding strength (110)
8. Volume resistivity
9. Surface resistivity
10. Dielectric constant
11. Dielectric loss tangent (tg8)
12.Breakdown voltage
Additional instructions:
Not less than
Not less than
Not less than
Not less than
Not less than
Not less than
Not less than
Not less than
This standard is proposed and managed by Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafters of this standard are Chen Huimin, Li Deming and Chen Zhiwen. 7
Specified value
Milky white viscous liquid, without coarse particles and foreign matter 40wwW.bzxz.Net
1x10*6
1x1016
People's Republic of China!
Mechanical Industry Standard
Paper Insulated Enameled Transposed Conductor
JB/T 67581993
Published and Distributed by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Word Count xxX,xXx
Format 880×1230
Print Sheet X/X
Edition X, XX, 19XX
Printing Edition X, XX, 19XX
Print Quantity 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://wwwJB.ac.cn661_89
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