HG/T 2583-1994 Determination of physical properties of rubber coated fabric insulating tape
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T 2583—94
Rubber coated fabric insulating tape
Determination of physical properties
Published on February 9, 1994
Ministry of Chemical Industry of the People's Republic of China
Implementation on January 1, 1995
Chemical Industry Standard of the People's Republic of China
Rubber coated fabric insulating tape
Determination of physical properties
1 Subject content and scope of application
HG/T2583---94
This standard This standard specifies the method for determining the physical properties of rubber-coated fabric insulating tapes for electrical use (abbreviated as insulating tapes). This method includes the determination of the thickness, width, adhesion, number of light-transmitting points of metal corrosion, power frequency breakdown strength and withstand voltage of 10, 15 and 20 mm wide low-voltage insulating tapes. This standard is applicable to the determination of the physical properties of insulating tapes for general-purpose wire and cable wrapping protection insulation, which are made of fiber fabrics coated with insulating rubber and can be used in an environment with a temperature range of -10 to +40°C and a voltage not exceeding 380V. 2 Reference standards
GB/T7537 Accelerated aging test for rubber coated fabrics GB/T7538 Determination of the properties of rubber coated fabrics in a roll GB/T7539 Standard environment for parking and testing of rubber coated fabrics HG2179 Rubber coated fabric insulating tape
3 General requirements for testing
3.1 Each insulating tape sample shall be freely parked in the standard environment A specified in the GB/T7539 standard. The parking time shall be no less than 16 hours, and the test shall also be carried out in the same standard environment. If it cannot be parked and tested in the standard environment, it must be noted in the report. 3.2 When taking the sample, remove at least 1m from the end of each sample before taking the sample. 3.3 The size, specification, appearance quality and sampling rules of the sample shall comply with the provisions of HG2179. 3.4 The surface of the sample shall be kept clean and shall not be touched by other substances. 4 Width measurement
4.1 Sample
The sample is a whole roll of insulating tape.
4.2 Test equipment
Steel ruler: Steel ruler with an accuracy of 0.5mm
4.3 Test stepsWww.bzxZ.net
Put the sample on a smooth table, use a steel ruler to measure the width of the edge of the insulating tape perpendicular to the disc, record the reading, and randomly measure the width at five different positions in the length direction with an interval of not less than 0.9m. 4.4 Test results
The test results are expressed as the average width of each disc sample, and its value is the arithmetic mean of the five measurement results. Approved by the Ministry of Chemical Industry of the People's Republic of China on February 9, 1994 and implemented on January 1, 1995
5 Thickness measurement
5.1 Sample
The sample is a whole disc of insulating tape.
5.2 Test device
HG/T 2583 —
Thickness: Use the thickness gauge specified in 6.1 of GB/T 7538. 5.3 Test steps
Place the sample on the platform of the thickness gauge, gently lower the pressure foot, record the reading of the thickness gauge, and randomly measure the thickness at five different positions in the length direction with an interval of not less than 0.9m. 5.4 Test results
The test results are expressed as the average thickness of each plate of samples, and its value is the arithmetic mean of the five measurement results. 6 Determination of metal corrosion performance
6.1 Samples
Two samples are cut from each plate of samples, and the length of each sample is 110±5mm. 6. 2 Test device
6. 2. 1 Copper rod: The rod is electrolytic copper. The diameter of the copper rod is 7~10 mm; the length is 75~80 mm. The number is 3 (one of which is a blank test rod). 6.2.2 Seal the test tube or ground-mouth bottle. 6.2.3 Constant temperature box. 6.3 Test steps 6.3.1 Polish the copper rod with 180-grit sandpaper, and then wipe it with degreased gauze to make its surface clean and bright. Then rinse it with anhydrous ethanol and let it air dry. 6.3.2 Start wrapping the insulating tape 10 to 12 mm away from the top of the steel rod. When wrapping, the adhesive surface should face the copper rod and wrap it in a spiral shape, and the latter spiral should overlap half of the former spiral. 6.3.3 Put the copper rod wrapped with the sample and the blank rod into a clean sealed test tube (or ground-mouth bottle) respectively, and keep them in a constant temperature box at a temperature of 100 ± 2t for 16 h. 6.3.4 Put the sealed test tube (or ground-mouth bottle) into a constant temperature box at 100 ± 2t for 16 h. Bottle) and place it in the standard environment A specified in GB/T7539 for 2~3h. Then take out the copper rod, remove the insulating tape, wash the steel rod with No. 120 gasoline, and visually observe whether there is corrosion on the surface of the copper rod that is in contact with the insulating tape.
6.4 Test results
The test results are expressed by whether there is corrosion on the surface of the copper rod. If the surface appears blue, bright color or spots, it is corrosion. Otherwise, there is no corrosion.
7 Determination of the number of light-transmitting points
7.1 Sample
Take 1200mm long from each reel of insulating tape as a sample. 7. 2 Test device
The test device is a test box. The appearance and dimensions of the test box are shown in Figure 1. 2
HG/T 2583 —94
Figure 1 Schematic diagram of light transmission point test box
1—The position where the white paint is applied is the glass plate surface; 2—Blank part, its brightness can be adjusted according to the brightness of the sensitive test sample; 3—The dimensions shown in the figure are the inner wall dimensions of the box, unit is mm, the inner wall of the test box is painted with white paint, and a glass plate is embedded in the observation port of the box surface. The size of the observation port is 300mm×50mm, and the rest of the plate surface is painted black except for the position occupied by the test sample. An 8W scanning lamp is used as the light source in the test box, and the distance between the light source and the sample observation port is about 80mm.
7.3 Test steps
7.3.1 Align the sample with the observation port, observe the sample continuously by visual inspection, and record the light transmission points within a length of 1200mm. Number 7.3.2 Place the sample on a smooth platform, use a steel ruler (the steel ruler should meet the requirements of 4.2) to measure the width of the vertical tape edge, measure 5 points on a length of 1200mm, record the readings, and calculate the arithmetic mean. 7.4 Test results
Expressed as the number of light-transmitting points per unit area, 8 Determination of adhesion
8.1 Samples
Take 5 samples from each insulating tape, and the length of each sample shall not be less than 650mm. 8.2 Test instrument
Use an automatic adhesive force testing machine,
The adhesive force testing machine consists of three parts: operation, measurement, and timing. The sample rolling time is 60±3s; the constant time after the sample is rolled is 180±5s; the sample is under the action of the drop code. The falling time is 60±3s. The length of the sample rolling and falling is indicated by the extension ruler.
8.3 Test steps
8.3.1 Connect the instrument to the power supply, preheat for 10 minutes, press the clutch switch, and make the pointer of the extension ruler zero. 8.3.2 Stick one end of the sample to the rotating shaft of the adhesion machine and roll it up for one circle. Clamp the other end of the sample into the fixture and hang the upper magnetic code (the quality of various base codes should meet the requirements of Table 1). 3
Sample width mm
Base code quality g
HG/ T 2583 — 94
Table 1 Adhesion test code quality
Rotation method
Dew after aging
Note: When the missing code quality is less than or equal to 1000 g, the allowable error is ±0.5g; when it is greater than 1000 g, the allowable error is ±1. 0g. 8.3.3 The sample glued to the rotating shaft must be flat and taut, then start the roll-up switch of the adhesive machine, after rolling up for 60±3s, the adhesive machine automatically stops, and reads the value of the sample curling length. 8.3.4 After the sample is kept under the action of the roll-up base code for t80±5s, the adhesive machine sends a flute signal, immediately remove the code and replace it with the falling base code (the code quality is shown in Table 1).
8.3.5 After the code is replaced, immediately start the instrument's drop switch, and the sample begins to fall under the action of the falling code. 8.3.6 After the sample falls for 60±3s, the adhesive machine automatically stops Stop the operation, and read the value of the sample's falling length. 8.4 Retest of adhesion after aging
Cut the sample according to 8.1, and then put the adhesive side of the sample facing outwards, spirally wrap it around a clean glass rod (the sample should not overlap), and hang it in a constant temperature box at a temperature of 70±1°C (the constant temperature box should meet the requirements of 3.2 of GB/T7537 standard), keep it for 24 hours, then take out the sample and place it in the standard environment A specified in GB/T7539 standard for 1 to 4 hours, and then you can test it according to the test steps of 8.3.1 to 8.3.6
8.5 Test results
The results of the adhesiveness test are expressed as the relative drop length of the insulating tape, calculated according to formula (1): L
Where: L--relative drop length, %;
L,--the reading of the dial when the sample is rolled up; L2--the reading of the dial when the sample falls
The final result is the median of the five test results. 9 Determination of withstand voltage and power frequency breakdown strength
9. Sample
L,-L2
Five samples are cut from each roll of sample, each with a length of about 300m. 9.2 Test device
9.2.1 Electrode
× 100
9.2.1.1 The shape and size of the electrode are shown in Figure 2, and the electrode device is shown in Figure 3. (1)
HG/T 2583—94
Figure 2 Electrode shape and size
1--Upper electrode (its height is adjusted according to the requirement of upper electrode mass 50g): 2 Sample: 3-Lower electrode
Figure 3 Schematic diagram of electrode device
1-Location hole: 2 Sample: 3-Electrode bracket (upper and lower insulating plates, fixed by positioning screws) 9.2.1.2 The electrode material is electrolytic steel. The electrode should be clean, smooth and without dents. 9.2.1.3 The upper and lower electrodes should be concentric. The diameter of the upper and lower electrodes is 6mm. The sharp edges of the two horizontal ends should be made into a through angle with a radius of 1mm.
9.2.1.4 The mass of the upper electrode is 50g
9.2.1.5 The electrode device should have a structure that makes the upper and lower electrodes concentric. 9.2.1.6 The volume resistivity of the insulating material should be greater than 101°1·m. The insulating material block should be able to ensure that it will not be broken down during the test. 9.2.2 High-voltage breakdown device
9.2.2.1 Test transformer
The capacity of the test transformer should ensure that the secondary rated current is not less than 0.1A. The power supply is a sine wave with a frequency of 50Hz, and its waveform distortion rate is not more than 5%. The operating current of the overcurrent relay should make the secondary current of the transformer less than its rated value. 9.2.2.2 Voltage regulator
The voltage regulator should be able to adjust the voltage evenly and make the breakdown occur between 10 and 20s. 9.2.2.3 The accuracy of the voltmeter should not be lower than level 1.5. HG/T.2583-94
9.2.2.4 It should have a circuit breaker that automatically cuts off the circuit when the sample is broken down. 9.3 Test precautions
9.3,1 Before the test, check whether the grounding of the instrument is good. 9.3.2 During the test, the upper and lower electrodes should be aligned with the center. 9. 4 Test steps
9.4,1 Withstand voltage test
9.4.1.1 Install the sample as shown in Figure 3. 9.4.1.2 Start the test voltage from zero and continuously increase it to 1kV at a speed of 100 V/s and maintain it for 1 min. After 1 min, quickly return the voltage regulator handle to zero.
9.4.2 Breakdown strength test
9.4.2.1 According to Figure 3 Install the sample as shown. 9.4.2.2 Start the test voltage from zero and continuously increase the voltage at a rate of 100V/s until the sample breaks down (the sample breaks down in an average of 10 to 20 seconds. Read the breakdown voltage value and record it. After the test, quickly return the voltage regulator handle to zero. Test 5 points on each sample and record the readings respectively. 9.4.2.3 Place the sample on the platform of the thickness gauge (the thickness gauge should meet the requirements of 5.2), gently lower the pressure foot, and record the thickness gauge readings. Measure 5 points on each sample and record their values respectively. 9.4.2.4 Test other samples according to the methods of 9.4.2.1 to 9.4.2.3 and record their values respectively. 9.5 Test results
9.5. 1 Withstand voltage test results
The test results are expressed by whether the sample is broken down. 9.5.2 Breakdown strength test results
For each sample, the lowest value of the 5-point breakdown voltage is taken as the breakdown voltage value. For each sample, the arithmetic mean of the 5-point thickness values is taken as the thickness value. The breakdown strength is calculated according to formula (2):
Where: E—breakdown strength, kV/mm;
U breakdown voltage, kV;
d-thickness, mm.
Take the median of the breakdown strength of 5 specimens as the final result. 10 Test report
The test report should include the following contents:
Product name and specification;
Test room temperature and humidity;
Standard number of the test basis;
Test item;
Test result;
Test date;
Tester:
Additional remarks:
HG/T 2583—94
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafter of this standard is Fei Kanghong.
This standard adopts ASTMD691990 "Test Methods for Insulating Tapes". From the date of implementation of this standard, the original national standard of the People's Republic of China GB5569--85 "Determination of Physical Properties of Insulating Tapes" will be invalidated.
People's Republic of China
Chemical Industry Standards| |tt||Rubber coated fabric insulating tape
Determination of physical properties
HG/T 258394
Editor: Chemical Industry Standard Editorial Department
(Standardization Research Institute, Ministry of Chemical Industry)
Postal Code: 100013
Printer: Standardization Research Institute, Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format: 880×12301/16Number of sheets: 13000First edition in June 1994
First printing in January 1994
Print run: 1—500
Cost: 3.40 Yuan
HG/T 2583 —942 The test voltage starts from zero and is continuously increased at a rate of 100V/s until the sample breaks down (the sample is broken down in an average of 10 to 20 seconds. Read the breakdown voltage value and record it. After the test, quickly return the voltage regulator handle to zero. Test 5 points on each sample and record the readings respectively. 9.4.2.3 Place the sample on the platform of the thickness gauge (the thickness gauge should meet the requirements of 5.2), gently lower the pressure foot, and record the reading of the thickness gauge. Measure 5 points on each sample and record their values respectively. 9.4.2.4 Test other samples according to the methods of 9.4.2.1 to 9.4.2.3 and record their values respectively. 9.5 Test results
9.5. 1 Withstand voltage test results
The test results are expressed by whether the sample is broken down. 9.5.2 Breakdown strength test results
For each sample, the lowest value of the 5-point breakdown voltage is taken as the breakdown voltage value. For each sample, the arithmetic mean of the 5-point thickness values is taken as the thickness value. The breakdown strength is calculated according to formula (2):
Where: E—breakdown strength, kV/mm;
U breakdown voltage, kV;
d-thickness, mm.
Take the median of the breakdown strength of 5 specimens as the final result. 10 Test report
The test report should include the following contents:
Product name and specification;
Test room temperature and humidity;
Standard number of the test basis;
Test item;
Test result;
Test date;
Tester:
Additional remarks:
HG/T 2583—94
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafter of this standard is Fei Kanghong.
This standard adopts ASTMD691990 "Test Methods for Insulating Tapes". From the date of implementation of this standard, the original national standard of the People's Republic of China GB5569--85 "Determination of Physical Properties of Insulating Tapes" will be invalidated.
People's Republic of China
Chemical Industry Standards| |tt||Rubber coated fabric insulating tape
Determination of physical properties
HG/T 258394
Editor: Chemical Industry Standard Editorial Department
(Standardization Research Institute, Ministry of Chemical Industry)
Postal Code: 100013
Printer: Standardization Research Institute, Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format: 880×12301/16Number of sheets: 13000First edition in June 1994
First printing in January 1994
Print run: 1—500
Cost: 3.40 Yuan
HG/T 2583 —942 The test voltage starts from zero and is continuously increased at a rate of 100V/s until the sample breaks down (the sample is broken down in an average of 10 to 20 seconds. Read the breakdown voltage value and record it. After the test, quickly return the voltage regulator handle to zero. Test 5 points on each sample and record the readings respectively. 9.4.2.3 Place the sample on the platform of the thickness gauge (the thickness gauge should meet the requirements of 5.2), gently lower the pressure foot, and record the reading of the thickness gauge. Measure 5 points on each sample and record their values respectively. 9.4.2.4 Test other samples according to the methods of 9.4.2.1 to 9.4.2.3 and record their values respectively. 9.5 Test results
9.5. 1 Withstand voltage test results
The test results are expressed by whether the sample is broken down. 9.5.2 Breakdown strength test results
For each sample, the lowest value of the 5-point breakdown voltage is taken as the breakdown voltage value. For each sample, the arithmetic mean of the 5-point thickness values is taken as the thickness value. The breakdown strength is calculated according to formula (2):
Where: E—breakdown strength, kV/mm;
U breakdown voltage, kV;
d-thickness, mm.
Take the median of the breakdown strength of 5 specimens as the final result. 10 Test report
The test report should include the following contents:
Product name and specification;
Test room temperature and humidity;
Standard number of the test basis;
Test item;
Test result;
Test date;
Tester:
Additional remarks:
HG/T 2583—94
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafter of this standard is Fei Kanghong.
This standard adopts ASTMD691990 "Test Methods for Insulating Tapes". From the date of implementation of this standard, the original national standard of the People's Republic of China GB5569--85 "Determination of Physical Properties of Insulating Tapes" will be invalidated.
People's Republic of China
Chemical Industry Standards| |tt||Rubber coated fabric insulating tape
Determination of physical properties
HG/T 258394
Editor: Chemical Industry Standard Editorial Department
(Standardization Research Institute, Ministry of Chemical Industry)
Postal Code: 100013
Printer: Standardization Research Institute, Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format: 880×12301/16Number of sheets: 13000First edition in June 1994
First printing in January 1994
Print run: 1—500
Cost: 3.40 Yuan
HG/T 2583 —94
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