Some standard content:
China State Shipbuilding Corporation Department Standard
CB115786
Technical Conditions for Rubber Cables for Hydrophones
Published on April 14, 1986
China State Shipbuilding Corporation
Implemented on May 1, 1987
China State Shipbuilding Corporation Department Standard
Technical Conditions for Rubber Cables for Hydrophones
CB1157—86
Classification Number: U67
This standard applies to cables for ship hydrophones. The cable is insulated with ethylene propylene rubber and its AC rated voltage is 250V. Working environment temperature
In seawater or fresh water: -2~+32℃;
Movable in air: -10~+55℃;
Fixed in air: -30~+55℃.
2 Models and specifications (see Table 1)
China State Shipbuilding Corporation Issued on April 14, 1986, implemented on May 1, 1987
CB 1157 86
ST*0/9T
ST0/91
In the model:
Long-term water-tight cable:
EPR rubber insulation,
Chlorosulfonated ethylene sheath:
Shielding.
② In the structure
Conductive core:
Braided shield
Sheath:
Filling sheath or wrapping tape:
Shielding insulation.
3 Technical requirements
CB 1157 --8B
8.1 The conductivity of copper conductive cores shall comply with the provisions of GB3956-83 "Copper and aluminum conductive cores of electrical equipment wires and cables". The structure is shown in Table 1. The conductive cores shall be tinned. The single-wire elongation at break of the conductive core shall not be less than 15%. 3.2 The performance of EPDM insulation shall comply with the provisions of Table 2. The standard insulation thickness shall comply with the provisions of Table 1. The average insulation thickness shall not be less than the standard value, and the thickness at the thinnest point shall not be less than 90% of the standard value minus 0.1mm.
The insulation cores of the cable shall be color-coded.
Table 2 Finished cable EPDM insulation properties
Long-term allowable working temperature of conductive core,
Mechanical properties before aging
Tensile strength, N/mm
Elongation at break, %
Mechanical properties after oven aging
Aging conditions: temperature 135±2℃, time 168hMaximum change rate of tensile strength, %
Maximum change rate of elongation at break, %
Mechanical properties after air bomb aging
Aging conditions: temperature 127℃, time 40hPressure 56N/cm2
Maximum change rate of tensile strength, %
Maximum change rate of elongation at break, %
Hot extension test
Treatment temperature 250±2℃
Time under load 15min
Mechanical pressure 20N/mm2
Maximum elongation under load, %
Maximum permanent elongation, %
Insulation resistance constant K (at 20℃), MQ·kmmesh
CB1157—86
Table 2 continued
Increase rate of AC capacitance after flooding with 50±2℃ water, %AC.
Additional aging test for finished cable
Aging conditions: temperature 95±2℃, duration 168hMaximum change rate of tensile strength, %
Maximum change rate of elongation at break, %
3.3 Cabling according to the required number of cores, and the pitch ratio of the cabling shall not be greater than 10.
For single-core cables, wrap a layer of latex glass cloth or other appropriate materials around the insulating core, and then shield it. The requirements are the same as those in 3.4.
For two-core cables, twist the two cores into a cable and wrap them with a layer of latex glass cloth or other appropriate materials, and then shield it. The requirements are the same as those in 3.4.
For four-core cables, first shield two of the cores separately, and the requirements are the same as those in 3.4, then wrap them with appropriate insulating tape, and then twist the four cores into a star-shaped cable, as shown in Table 1.
The insulating cores should not be bonded to each other, and the cable should be round. Fillers or latex glass cloth or other appropriate materials can be added during cabling. 3.4 The shielding is woven with tinned copper wire, the diameter of the copper wire is 0.12mm, and the shielding braiding density is not less than 90%. The shielding layer should adopt noise reduction measures, and the noise voltage value of the finished cable is not greater than 1mV. 3.5 The sheath of the cable may be made of chlorosulfonated polyethylene whose performance conforms to Table 3 or other dense materials that have small water absorption under water pressure and can bond with chloroprene rubber.
The standard thickness of the sheath shall conform to the provisions of Table 1. The average thickness of the sheath shall not be less than the standard value, and the thickness at the thinnest point shall not be less than 85% of the standard value minus 0.1mm.
Table 3 Performance of chlorosulfonated polyethylene sheath of finished cable No.
Long-term allowable operating temperature of the conductive core of the sheathed cable, ℃ Mechanical properties before aging
Tensile strength, N/mm2
Elongation at break, %
Mechanical properties after oven aging
CB1157 --86
Continued Table 3
Aging conditions: temperature 120±2℃, time 168hMaximum change rate of tensile strength, %
Maximum change rate of elongation at break, %
Mechanical properties after oil immersion
Oil immersion conditions: temperature 100±2℃, time 24hMaximum change rate of tensile strength, %
Maximum change rate of elongation at break, %
Finished cable ignition testWww.bzxZ.net
Cable sample length|| tt||600±25mm
T=60+W
Continuous fire supply time
Where: T
Time, 8
Mass of cable sample, more
After the flame is removed, the burning
burns out by itself, and the burnt
or affected part
should be
50mm outside the bottom of the clamp on the sample
The cable sheath should be printed with the model, number of cores, cross-section, and length marks. The distance between two adjacent marks should not exceed 50mm, and the handwriting should be clearly legible and durable.
3.6 The outer diameter of the finished cable should not exceed the maximum outer diameter specified in Table 1. 3.7
The DC resistance of the conductive core of the finished cable should meet the values specified in Table 4. Table 4 Conductive core DC resistance
Nominal cutoff
DC resistance
3.8 The finished cable should be able to withstand 1.5kV, AC 50Hz voltage test for 5min between core and core, core and shield, and 100V, AC 50Hz voltage test for 5min without breakdown. The insulation resistance of the finished cable (at +20℃) should comply with the provisions of Table 5. 3.9
CB1157-86
Table 5 Insulation resistance
Insulation resistance of cable core at +20CMQ·km>1700
The working capacitance of the finished cable single core is not greater than 100pF/m at 1kHz, and the working capacitance of the two-core cable is not greater than 3.10
180pF/m at 1kHz. When the two-core cable is delivered, the capacitance change rate under pressure cycle should be provided. 3.11 The finished cable should be able to withstand the horizontal water tightness test, the test pressure is 2.94MPa, and the duration is 2h. The cable should not drip during the test.
3.12 The cable should be soft, have good bending performance, and should withstand the flexure test. 3.13 The finished cable should withstand the low temperature performance test of -20℃ and 2h. 3.14 The insulation resistance of the cable after 90 days of immersion in tap water at room temperature: between the core and the core, it should be no less than 100MQ·km; between the core and the shield, it should be no less than 100MQ·km; between the shield and water, it should be no less than 1MQ·km3.15 The surface of the cable should be smooth, without sand and bubbles. The shape of the cable should be round and without oil sticks. 3.16 The cable should have the manufacturer's name and the year of manufacture. Test method
Insulation thickness inspection
According to GB2951.2-82 "Wire and cable
4.2 Sheath thickness inspection
Insulation thickness measurement method".
According to GB2951.3-82 "Wire and cable
Sheath thickness measurement method".
4.3 Cable outer diameter inspection
According to GB2951.4-82 "Wire and cable
4.4 Insulation and sheath mechanical properties test
According to GB2951.582 "Wire and cable
Mechanical properties test method".
4.5 Oven aging test
According to GB2951.7-82 "Wire and Cable"
4.6 Air bomb aging test
According to GB2951.8-83 "Wire and Cable"
4.7 Oil immersion test
According to GB2951.15-82 "Wire and Cable
4.8 Low Temperature Performance Test
According to GB2951.12-82 "Wire and Cable
Test Method".
4.9 Hot Extension Test
According to GB2951.1882 "Wire and Cable
4.10 Flame Test
According to GB2951.1982 "Wire and Cable
Outer Diameter Measurement Method".
Insulation Mechanical Performance Test Method" and GB2951.6-82 "Wire and Cable Sheath Machine Air Box Thermal Aging Test Method".
Oil Immersion Test Method".
Low Temperature Winding Test Method" and GB2951.13-82 "Wire and Cable Low Temperature Tensile and Hot Extension Test Method".
Flammation Test Method".
4.11 Flexure test
CB1157—86
Perform in accordance with GB2951.21-82 "Flexure test method for flexible wires and cables". 4.12 Conductive core DC resistance inspection
Perform in accordance with GB3048.4-83 "Conductive core DC resistance test method for wires and cables". 4.13 Finished cable insulation resistance inspection
4.13.1 The insulation resistance test should be carried out after the voltage test. The insulation resistance should be measured on the entire finished cable. The measuring device and specific method should be carried out in accordance with GB3048.5-83 "Wire and cable insulation resistance test method galvanometer comparison method" or GB3048.6-83 "Wire and cable insulation resistance test method voltage-current method". 4.13.2 The measuring voltage is 200~500V DC. The test voltage should be applied between each conductor and all other shielded conductors. 4.13.3 The insulation resistance shall be read 1 minute after the DC voltage is applied. In some cases, the charging time can be extended to 5 minutes in order to achieve basic stability of the measurement.
4.13.4 The insulation resistance measured at ambient temperature shall be converted to the value at 20°C using the temperature correction coefficient, which is the result obtained by testing the insulating material. 4.14 Voltage test
It shall be carried out in accordance with GB3048.8-83 "AC voltage test method for wires and cables". 4.15 Water immersion capacitance increase rate test
4.15.1 Sample preparation
The sample consists of a 4.5m long insulated wire core. This sample has been subjected to the specified high voltage test, and any sheath other than insulation shall be removed.
4.15.2 Test equipment
The main test equipment is a water tank, which should be able to immerse a 3m long section in the middle of the sample in water, with 0.75m at each end above the water surface. The water tank can keep the water temperature at 50±2℃ and the water level remains unchanged. 4.15.3 Test procedure
The sample should first be dried in an air oven at 70-75℃ for 24h. When the sample is taken out of the air oven, it should be immediately placed in tap water preheated to 50℃. The sample is immersed in water for 14 days. 4.15.4 Capacitance measurement
The capacitance between the wire and the water should be measured with a low-voltage AC bridge with a frequency of 800 or 1000Hz. The measurement time is: at the end of the first day, the capacitance C is measured.
At the end of the seventh day, the capacitance C is measured.
At the end of the fourteenth day, the capacitance Ci* is measured. During the entire measurement process, the water temperature should be kept constant and the water level should remain unchanged. 4.15.5 Calculation of capacitance increase rate
The capacitance increase rate is calculated according to formula (1) and (2): C.-C,
AC, (%) =
4C,(%)
4.16 Durability test of printed characters on cable sheath C1+-C,
(2)
This test method is used to test the abrasion resistance of printed digital marks, manufacturer's name and trademark characters on insulation and sheath. Gently wipe ten times with a ball of absorbent cotton or a piece of cotton cloth soaked in water. The inspection result should meet the requirements of Article 3.5. 4.17 Working capacitance inspection
4.17.1 Measurement error: not more than ±1%. Measurement frequency: 1Hz.
Specimen: finished cable not less than 100 times the outer diameter of the insulation. 4.17.3
4.17.4 Measurement method and result calculation
Measurement can be performed using two-terminal or three-terminal methods. a
Calculate capacitance:
CB1157-86
Two-terminal method: Open one end of the sample and connect the shielding layer of the other end to the ground terminal of the capacitance bridge. According to formula (3), C=2 (C.+Cb) -C.
Where: C—working capacitance per unit length between the two cores of the tested sample, pF/m; C,—capacitance between core A and core B connected to the shield, PF; capacitance between core B and core A connected to the shield, PF; Cb—
capacitance between cores A and B connected to the shield, PF; l—length of the tested sample, m.
b. Three-terminal method: Open one end of the sample and use the other end for test connection. The capacitance is calculated by formula (4): C = 4Ca + C. + c?
Where: C—working capacitance per unit length between the two cores of the tested sample, PF/m; capacitance between a core A and a core B, with the shield connected to the ground end of the capacitance bridge, PF; Ca
C. Capacitance between a core A and the shield, with the core B connected to the ground end of the capacitance bridge, PF; capacitance between a core B and the shield, with the core A connected to the ground end of the capacitance bridge, PF; Cf
! —length of the tested sample, m.
In order to eliminate the influence of stray capacitance between the core and the surrounding objects, the sample should be suspended, and the distance between the sample and the surrounding objects shall not be less than 1m.
4.18 Cable transverse watertightness test
Sample: The sample is a 2.5m long finished cable. Test device: A hydraulic box (cylinder) with sealed stuffing boxes at both ends. 4.18.2
4.18.3 Test procedure
4.18.3.1 Bend the sample 10 times on a cylinder with a diameter of 5 times the outer diameter of the cable (bend the cable 180° and then straighten it to its original position as one time).
4.18.3.2 Place the bent sample in a water pressure box (cylinder), and the two ends of the cable extend out of the water tank through the sealing stuffing box. The pressure in the water tank and the duration should meet the requirements of Article 3.11. 4.18.4 Qualification requirements
There should be no dripping of water on the cable ends exposed outside the box within the specified time. 4.19 Tin layer continuity test of tinned copper wire
4.19.1 Sample preparation
Strip the sheath and insulation of a cable sample about 300mm long to expose the conductor. Avoid damaging the copper wire coating. Remove several wire segments from the outer layer of each conductor and cut them into appropriate lengths so that they can be completely immersed in the ammonium persulfate solution. Then clean them thoroughly with a suitable solvent (such as gasoline or petroleum ether) and dry them with a clean soft cloth. The ends of each wire segment are completely waxed to protect the exposed copper. Prepare two test specimens from the cable sample. The total length of each test specimen shall be calculated using the formula L = 300/d, where d is the nominal wire diameter. Both L and d are expressed in mm. The waxed ends shall not be included in the measured length L. 4.19.2 Test solution
4.19.2.1 Test solution (ammonium persulfate) Dissolve 10 g of ammonium persulfate crystals with an ammonium persulfate content of not less than 95% in 500 mL of distilled water, add 75 mL of chemically pure ammonia water (density 0.9 g/cm\), and dilute to 1000 mL with distilled water. Prepare fresh ammonium persulfate solution on the day of the test. The temperature should not be higher than 35°C.
4.19.2.2 Reference color standard (copper sulfate-ammonium hydroxide) 8
CB1157-86
Dissolve 0.2g of anhydrous copper sulfate (CuS0.) in distilled water. Add 75mL of chemically pure ammonia solution (density 0.9g/cm\) and dilute to 1000mL.
4.19.3 Test procedure
Use a test tube of appropriate size as a container, immerse each sample of the required length in 100mL of test solution at a temperature of 18±3℃ for 15min, then remove the sample, compare the test solution with the reference color standard placed in a similar test tube at the same depth, and observe the solution along the longitudinal direction of the test tube to compare the color.
4.19.4 Qualification requirements
The color of the test solution in which the sample is immersed should not be darker than the color of the reference color standard solution. Both samples should meet this requirement. 4.20 Shielding braiding density inspection
Measure the following data of the braided layer from the tested cable sample: c
Number of braided strands;
Number of braided wires per strand,:
Diameter of each braided wire, mm;
Braiding pitch, mm;
Braiding inner diameter, mm.
Calculate the braided layer density according to formula (5):
K(%)=（2F-F2)×100
Where:
2Psina
Where is the angle of the braided wire to the longitudinal axis of the cable. 4.21 Low noise inspection
Perform according to Appendix A (reference).
4.22Perform the capacitance change rate test under pressure cycle according to Appendix B (reference).
5 Acceptance rules
V(元D)I+P
5.1'The product shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory, and a product inspection certificate shall be attached. 5.2 Tests are divided into factory tests and type tests
Type tests shall be carried out at least once every four years, and shall also be carried out when the first batch is put into production or when the product structure, process, materials and formula are changed. Factory tests shall be carried out when the products leave the factory. Factory test items
Insulation thickness inspection;
Sheath thickness inspection;
Cable outer diameter inspection;
Conductive core DC resistance inspection:
Voltage test;
Insulation resistance inspection:
Horizontal watertightness test;
Capacitance change rate test under pressure cycle (only provide data, no assessment). Type test items
In addition to all factory test items, the following tests are also required: a.
Insulation and sheath mechanical properties test;
Oven aging test;
Air bomb aging test;
Oil immersion test:
Low temperature performance test:
Hot extension test;
Flame retardation test;
Water immersion capacitance increase rate test
Insulation and sheath printing handwriting durability test Working capacitance inspection;
Low noise inspection:
Tinned copper wire layer continuity test;
Shielding braiding density inspection;
Bend test;
Insulation resistance inspection after immersion in tap water for 90 days. Packaging and marking
GB1157 --86
The cable is supplied in drums and should be properly packaged, and the cable ends should be sealed. The cable drum should indicate the correct direction of rotation. Each cable drum should be attached with a label indicating the following items: Manufacturer name;
Cable model:
Cable specification (number of cores × nominal cross-section mm\) Rated voltage: V;
Length: m
Mass: kg:
Date of manufacture: year, month.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.