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Mechanical Industry Standard of the People's Republic of China
JB/T3172
1999-08-06
Wa Xian Ji Dong
2000-01-01
JB/T31721999
This standard is a revision of JB3172-82 "3520 Ketone-aldehyde Laminated Paper Tube". The main differences between this standard and JB3172-82 are: "According to GB/T1, add Chapter 1 "Specifications", Chapter 2 "Reference Standards" and Chapter 3 "Classification and Nomenclature"; modify the titles of Chapters 4 and 6. In addition, the form of the table, the titles of the columns in the table, various criteria and measurement units, etc. have also been modified according to relevant regulations, and the content originally listed in the "Test Treatment" column (such as Table 5) in the table has been removed from the table and written into the relevant items of Chapter 5 "Test Methods".
2 Technical requirements and test methods
The technical requirements remain unchanged. However, the test method standard GB1304-77 General Test Method for Electrical Insulating Thermosetting Laminated Products cited in the original JB/T3172 has been abolished. Therefore, when revising this standard, GB5132-1985 Test Method for Electrical Insulating Laminated Tubes is quoted instead. For the test methods that are missing in the standard but are required by this standard to maintain consistency with the technical requirements of the original JB/T3172, the names are either directly written into Chapter 5 "Test Methods" of the left standard (such as bending, vertical layer withstand voltage), or supplemented in the form of an appendix (standard appendix) (for example, thermal stability, bending strength and loss factor, etc.). , some test contents (for example, sample electrodes, etc.) are written into the relevant provisions of Chapter 5\Test Methods according to the requirements of the original GB1304-77 or the original JB/3172-82. In addition, the test methods for mechanical processing properties. Since the original referenced test method standards have been terminated, they are now changed to "according to the agreement between the supply and demand parties". Finally, some performance names have also been changed according to the current terminology, for example, "specific gravity" is changed to "density", "dielectric loss tangent" is changed to "loss factor", etc. This standard will take effect from the date of implementation and will replace Appendix A, Appendix B and Appendix 1 of JB3172-82. The attached C are all the requirements of the standard. This standard is proposed and managed by the National Insulation Material Standardization Technical Committee. The drafting units of this standard are Harbin Insulation Material Factory and Guilin Electric Science Research Institute. The drafter of this standard is Gao Binghua.
This standard was first issued on November 26, 1982 and revised for the first time in 1999. This standard is entrusted to the National Insulation Material Standardization Technical Committee for interpretation. I
1 Scope
Technology
JB/T31721999
JB317282
This standard specifies the model, requirements, Test methods, inspection, packaging, marking, storage and transportation: This standard applies to thermosetting phenolic laminated paper tubes made of insulating winding paper as the base material and phenolic resin as the adhesive, which are heated, rolled, pressed, baked and cured.
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1305-1985 Inspection, packaging, transportation and storage rules for electrical insulating thermosetting laminated materials GB/T 1408—1989
GB/5132—1985
JB/T 2197—[996
3 Classification and naming
Test method for power frequency electrical strength of solid insulating materials (e9vIEC60243:1967) Test method for electrical insulation laminated tubes (neqASTMD348:1980) Classification, naming and model compilation of electrical insulating materials products According to the provisions of JB/T2179, the model of this product is 3520, and its characteristics are shown in Table 1. Table 1
4 Requirements
4.1 Appearance
Good performance in dry state, suitable for butterfly environment and transformer agent as the surface of the insulating structural parts of electrical equipment should be flat, without defects such as delamination, bubbles and ridges, but wrinkles and processing and finishing marks that do not exceed the allowable deviation of wall thickness are allowed.
The surface is allowed to have a small amount of impurities, slight color unevenness, scratches and glue flow marks that do not affect its surface withstand voltage. The inner wall is allowed to have slight wrinkles, bubbles and core mold indentations that do not affect the vertical withstand voltage. The end face should be cut neatly. The end face of the wall thickness of more than 13mm is allowed to have slight cracks. 4.2 Color
The surface of the part should be coated with moisture-proof and oil-resistant insulating varnish. Its head color should be natural, generally light brown to reddish brown. 4.3 Dimensions and allowable deviations
4.3,1 The nominal inner diameter, wall thickness range and allowable deviation shall comply with the specifications in Table 2. Wa Extremely Slow 1999-08-06 Tumor
2000-01-01 Small Cable
Nominal Inner Diameter
5~15 (Multiples of 1)
16~50 (Multiples of 1)
51~120 (Multiples of 1)
122~250 (Multiples of 2 or 5)
255~500 (Multiples of 5)
505-B0 (3 Multiples of 10)
810-1000 (multiples of 10)
1010-1200 (multiples of 10)
Nominal thickness:
JB/T3172
Inner diameter allowable deviation
Wall range
Wall thickness allowable deviation
Thickness below 10
When the thickness is 1.0-3.0mm, it is a multiple of 0.5mm: When the thickness is 31~15mm, it is a multiple of /mm: When the wall is 16~30mm, it is a multiple of 2mm; when the thickness is 31~50mm, it is a multiple of 5mml. 2
The original allowable deviation of paper tubes with a thickness greater than 25mm shall be agreed upon by both parties. Specifications other than the nominal size can be produced by agreement between the supply and flow parties. The length and the length tolerance shall comply with the provisions of Table 3. Table 3
Nominal length
450~550
900~[200
1400-1950
Note: When the purchaser does not specify the length requirement, the minimum length shall not be less than 425mm. 4.4
Bending
Bending shall comply with the provisions of Table 4.
5 ~ 25
25 and above
Length tolerance
4.5 After machining such as potting, drilling, turning (excluding threading) and milling, there shall be no delamination or shedding. 5 Physical, mechanical and dielectric properties shall comply with the provisions of Table 5. 4.6
5 Test method
3.1 Appearance and color
Evaluate with eye contact.
Dimensions and allowable deviations
Thickness 10~25
Length, outer diameter, inner diameter and wall thickness shall be in accordance with 3.1, 3.2, 3.3 and 3.4 of GB/T5132-1985 respectively. 2
Water absorption
Thermal stability (24h)
Bending strength
Compression strength
Loss factor (50Hz)
JB/T3172
Inner diameter (5 ~ 25 mm)
Vertical withstand voltage 1) (withstand voltage for 5min in transformer oil at 90±2℃)
Wall sequence: 1.5-2.5mm
2.5 ~ 3.5 mm
3.5 ~ 45mm
4 5 -6 mm
Interlayer withstand voltage (withstand voltage for 5 min in transformer oil at 90±2℃)
Surface withstand voltage (after being damp: withstand voltage for 1 in normal air min)
The test voltage value is calculated according to the actual thickness of the sample and the corresponding withstand voltage index. 2) The sample is taken according to 5.3.4 of this standard, and the inner diameter is 15mm or more. Table 6
Water absorption
Note: For the sample with medium wall thickness, the index of the larger specification shall be implemented. 5.3
Bending
Inner diameter (above 25 mm)
≤ the value in Table 6
Put a 1m long ruler with a graduation value of 11mm parallel to the axis on the laminated tube, and use a ruler with a graduation value of 0.5mm to measure the maximum gap between the 1m long ruler and the laminated tube wall as the bending. When the length of the laminated tube is less than 1m, its bending is converted into the curvature of 11 length based on the actual measurement result.
5.4 Machining performance
According to the agreement between the supply and demand parties.
5.5 Density
According to the provisions of Chapter 7 of GB/T5132-1985, the result is expressed in density, that is, multiply the measured specific gravity value by 0.9982g/cm (density of water at 20℃), unit is m. The water temperature is changed to 20±2℃, 5.6 Water absorption
JB/T31721999
According to the provisions of Chapter 6 of GB/T5132-1985, select laminated tubes with nominal inner diameter of 26~50inm and wall thickness of .5-13imm as samples, and their length is 50±1mm.
5.7 Thermal stability
According to the provisions of Appendix A, but the samples are tubes with wall thickness of 13 mm and below. 5.8 Bending strengthwwW.bzxz.Net
According to the provisions of Appendix B.
5.9 Compression strength (axial)
According to the provisions of Chapter 5 of GB 5132-1985, but the sample size is stipulated as follows: 3mm and above, the sample height is equal to the inner diameter of the pipe: wall thickness is less than 3mm or the inner diameter is less than 10mm or the outer diameter is too large to test, no test. The test speed is 10±2mm/min5.10 Loss factor
According to the provisions of Appendix C,
5.11 Vertical interlayer voltage
According to the relevant provisions of GB/T1408-1989. Among them, there are not less than five samples, and each sample is taken from the original wall thickness of 1.5-9mm. The length of the sample is based on the surface without discharge (generally 100mm). For those with a wall thickness of 5mm or more, it is generally 150~2001mm long. The electrode is made of annealed lead foil or tin-lead with a thickness not exceeding 0.02mm. A very small amount of vaseline (or transformer oil, silicone oil or silicone ester) is pasted on the inner and outer surfaces of the sample. The outer electrode is 25±0.5mm wide and the inner electrode is 50±0.5mm wide. They are symmetrically pasted on the middle part of the tube. A gold display box or a thin wire can be used as the electrode lead. The sample is dried at a temperature of 70±2 for 41°C and placed in a dryer containing color-changing silica gel to cool for no less than 61°C. Then, in 90±2℃ transformer oil, the voltage is continuously and evenly increased to the specified voltage value [see Table 5 to 1] and maintained for 5min. Record the qualified or unqualified conditions. The test result is qualified if each sample does not break down. 5.12 Parallel layer withstand voltage
is carried out according to the relevant provisions of GB/T5132-1985. Among them, there are not less than five samples, and each sample is 100mm long. Take the original wall thickness tube with an inner diameter of more than 15mm and a wall thickness of 13mm or less. The center distance of the pin electrode is 30±1mm. After the sample is dried at a temperature of 70±2℃ for 4b, it is placed in a dryer containing color-changing silica gel and cooled for not less than 6, and then continuously and evenly boosted in 90±2 transformer oil to the voltage value specified in Table 5 and maintained for 5min, and the qualified or unqualified is recorded. The test result is qualified if each sample does not break down.
5.13 Table withstand voltage
is carried out according to the relevant provisions of GB/T5132-1985. Among them, there are not less than five samples, and each test is 15D1 long according to the original tube diameter. After the sample is exposed to moisture at a temperature of 20±2℃ and relative humidity of (95±3)% for 24 lh, it is continuously and evenly pressurized to the voltage value specified in Table 5 in 23±1℃ air and maintained for 1in, and the pass or fail is recorded: the test result is qualified if none of the samples are broken down. 6 Inspection, packaging, marking, storage and transportation 6.1 Factory inspection items are the 4.1, 4.2, 4.3, 4.4 and 4.6 of Table 5 in this standard. Among them, 4.1, 4.2, 4.3 and 4.4 are inspection items one by one.
6.2 Other components comply with the provisions of GB/T1305. JB/T3172
Appendix A
【Appendix to the standard】
Thermal stability
This method is to place the sample at a specified temperature for a certain period of time and then check the appearance to evaluate the stability of the sample to heat. A1 Test specimens
Each group of test specimens shall be no less than three, and the size shall comply with the following provisions: For laminated tube test specimens, take tubes with a wall thickness of 13 mm or less, and take a length of 5D mm according to the original tube diameter. If the tube diameter is too large to be tested, a block sample with a length of 50 mm and a width of 50 mm can be cut from the tube wall. A2 Test equipment and H!
a) A thermostatic box with a controllable temperature of +2°C:
b) A container containing transformer oil;
|) A ruler with a graduation value of 0.5 mm.
A3 Check and record the appearance of the test specimens before testing. A4 Hold the test specimens in the thermostatic box with a thin metal wire, and prevent the test specimens from contacting each other or the box wall. The temperature of the thermostatic box should be adjusted from the temperature of the product standard within 30 minutes, and the holding time should be in accordance with the product standard. If there is no regulation, keep it for 24, then take the sample, cool it in the air at a temperature of 20±5% for 21 and observe it directly. There shall be no cracks and bulges, and fine cracks with the width of a hairline are allowed. If any sample in each group of samples does not meet the above requirements, the test result shall be unqualified. A5
JB/T31721999
Appendix B
(Appendix of the standard)
Bending strength
This method applies a bending load to the sample to destroy it and calculates the bending strength. B1 Sample
Each group of samples shall not be less than five, and the size shall comply with the following regulations: For laminated tube samples with a nominal inner diameter of 200mm or less, take a length of 15±0.2mm according to the original diameter. For samples with a nominal inner diameter of more than 200mm, cut the sample according to the shape and size shown in Figure B1. If the sample cannot be taken according to Figure BI, it shall not be tested. 10±0.2
Figure B1 Bending strength specimen of laminated tube with nominal inner diameter of 200mmB2 Test equipment and tools:
1) Material testing machine with indication error not exceeding 1%, the specimen breaking load should be within the range of 15%~85% of the full scale of the testing machine; 2] Metal bracket with adjustable support distance with rounded corner radius of 5±0.1mm for metal pressure head and rounded corner radius of 2±0.1mm at the support point;
3) Vernier caliper with graduation value not greater than 0.1mm. B3 Measure specimen size
Take the average value of three-point elasticity as the measurement result. B4 Select support distance according to specimen specifications
Laminated tube with nominal inner diameter of 200mm or less shall be placed between flat plates: For tube with nominal inner diameter of more than 200mm, cut long strip specimen (see Figure Bl), and the support distance L shall be 10H±0.5mm (H is nominal length, unit: mm). B Test
For pipes with a nominal inner diameter of 200mm or less, place the specimen on the testing machine platform according to Figure B2: For pipes with a nominal inner diameter of more than 2001mm, place the specimen on the testing machine support according to Figure B3. Then, apply the load at a rate of 1D+2mn/rnin until the specimen is damaged and read the load value. For lath specimens of pipes with a nominal inner diameter of more than 200mm, if the damage is not in the middle part of the three equal parts of the support distance, the result is invalid.
BG Bending strength calculation
JB/T3172
Upper pressure plate
77777777
Lower pressure plate
Figure B2 Bending strength test device for laminated tubes with nominal inner diameter of 200 mm and below
Figure 3 Bending strength test device for laminated tubes with nominal inner diameter of 200 mm and aboveFor tubes with nominal inner diameter of 200 mm and below, calculate the bending strength according to the following formula:T
Where: t
Bending strength, Nimm;
PSpecimen breaking load, N;
LSpecimen length, mm:
ASpecimen outer diameter: mm
dSpecimen inner diameter, mm;
Pi, take 3.14,
3P(D +d)2
xLd(D - d)2
For pipes with a nominal inner diameter of more than 2001mm, the bending strength is calculated according to the following formula: 1.5PL
Wherein: {
-bending strength, Ninm2;
P--specimen damage load, N;
L-support distance, mm;
B-specimen width, mm1:
-specimen thickness, imn.
The test results are expressed as the average value of the sieve method of each group of samples, with three significant digits. JB/T31721999
Appendix C
(Appendix to the standard)
Power frequency (frequency 50Hz) loss factor
This method uses a power frequency bridge or other measuring instruments to determine the loss factor. C1 Specimens and Electrodes
C1.1 Each group of specimens consists of three specimens, and the size should comply with the following regulations: 100mm long specimens are taken according to the original diameter. However, if the diameter of the pipe is too large and the test is difficult, block specimens with each side length of 100mm can be taken. If the wall thickness is 3mm or less, it is the original size; if the wall thickness is more than 3mm, it should be processed from one side to 2~3mm. 1.2 Electrode
Use a three-electrode system, as shown in Figure C1. C2 Test equipment
Any instrument that can meet the loss factor measurement and the error is not more than 10%. C3 Sample normalization treatment
Before the test, the sample is dried at a temperature of 70±2℃ for 41, and then placed in a dryer containing color-changing silica gel to cool for not less than 6 hours. C4 Test
After the sample is pasted with the electrode, it is measured by a bridge or other measuring instrument. The test voltage is in accordance with the product standard. If there is no regulation, 50[Iz, 1000V is used: adjust the bridge balance according to the instrument usage method, and read the measured value directly from the instrument. C5 Result
The test result is expressed as the arithmetic mean of each group of samples, read to 0.001. a
1—auxiliary measuring electrode: 2—protective middle electrode; 3—high voltage electrode: 4—sample diagram CI measurement of tubular sample loss due to the whole electrode configuration diagram 8
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JB/T3172
Lai 880b1230
19XXXX Ridge
100044
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