JB/T 5332.1-1991 Electric submersible pump cables with rated voltage up to and including 3.6/6kV Part 1 General provisions
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 5332.1-1991
Electric submersible pump cables with rated voltage of 3.6/6kV and below Part 1 General provisions
Published on June 28, 1991
Implementation on July 1, 1992 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
General provisions for electric submersible pump cables with rated voltage of 3.6/6kV and below
Part 1
1 Subject content and scope of application
JB/T 5332.1-1991
1.1 This standard specifies the product classification, general technical requirements, test methods, inspection rules, marking and packaging of electric submersible pump cables with rated voltage of 3.6/6kV and below.
1.2This standard applies to lead-in cables and power cables for electric submersible (including submersible and submersible brine) pump units with rated voltages of 3.6/6kV and below.
1.3This standard should be used together with JB5332.2 "Electric submersible pump cables with rated voltages of 3.6/6kV and below Part 2 Electric submersible pump lead-in cables", JB5332.3 "Electric submersible pump cables with rated voltages of 3.6/6kV and below Part 3 Electric submersible pump flat power cables", and JB5332.4 "Electric submersible pump cables with rated voltages of 3.6/6kV and below Part 4 Electric submersible pump round power cables".
2 Reference standards
GB2072
GB2900.10
GB2951
GB2952
GB3048
GB3953
GB3957
GB4005
GB4909
GB4910
GB7594
GB8815
JB5331
Nickel and nickel alloy strip
Electrical terminology
Part 10 Wires and cables
Methods for testing the mechanical and physical properties of wires and cables Cable outer sheath
Test methods for electrical properties of wires and cables
Electrical round copper wire
Copper and aluminum conductive wire cores of power cables
Wire and cable delivery trays
Galvanized steel strip for armored cables
Test methods for bare wires
Tinned round copper wire
Rubber insulation and rubber sheath for wires and cables
Soft polyoxyethylene plastic for wires and cables
Polyimide fluorine 46 composite film wrapped steel round wire 3 Terms, symbols, and codes
8.1 Terms
3.1.1 Rated voltageWww.bzxZ.net
Rated voltage is the reference voltage for cable design and electrical properties test, expressed as U./U, in kV. U. The effective value of the voltage between any main insulated conductor and "ground" (metal shield, metal coating or metal sheath). U-The effective value of the voltage between any two phase conductors of a multi-core cable. 8.1.2 Oil-resistant cushion layer
The oil-resistant and heat-resistant covering layer that protects the cable sheath from crude oil infiltration is usually composed of oil-resistant and heat-resistant films, such as polytetrafluoroethylene (F4), ethylene (F40), trifluorochloroethylene film, etc., and a braided layer of oil-resistant and heat-resistant fibers (such as glass fibers, nylon fibers, polyester fibers, etc.).
3.1.3 Combined insulation
Insulation composed of two or more insulating materials. 3.2 Symbols, codes and product representation methods
3.2.1 Symbols, codes
3.2.1.1 Series code
Submersible pump lead cable
Submersible pump power cable
2 Conductor material code
Copper conductor
3.2,1.3 Insulation material code
Polypropylene (including modified polypropylene)
Cross-linked polyethylene
EPR
Polyimide-tetrachloroethylene hexafluoropropylene copolymer (F 46) composite film/EPR combined insulation Polyimide-tetrachloroethylene hexafluoropropylene copolymer (F 46) composite film/fusible polytetrafluoroethylene combined insulation
3.2.1.4 Sheath (including inner sheath) material code Lead (lead alloy)||tt| |EPR
Chlorosulfonated polyethylene
NBR polyvinyl chloride compound
Nitrile rubber
3.2.1.5 Structural feature code
Outer sheath code
3.2.2 Product representation method
3.2.2.1 The product is represented by model, rated voltage, specification and the number of this standard. Its specific composition is shown in the figure 0
JB5332.1—91
Number of cores×section
Rated voltage
Outer sheath code
Shape feature code
Inner sheath code
Insulation code
Series code
According to GB2952
JB/T5332.1-1991
a. Rated voltage 1.8/3kV polypropylene insulation nitrile rubber inner sheath bare steel tape interlocking armored sectoral submersible pump power cable, 3×16mm, expressed as: WQPN10-1,8/33×16JB5332.391b. Rated voltage 3.6/6kV EPDM insulation EPDM rubber sheath steel tape interlocking armored polyoxyethylene outer sheath round submersible pump power cable, 3×33.5mm2, expressed as: WQEEY12-3.6/63×33.5J B5332.4-91C. Rated voltage 1.8/3kV polyimide-fluorine 46 composite film/ethylene propylene rubber combined insulation lead inner sheath bare steel tape interlocking armored fan-shaped submersible pump lead-in cable, 3×20mm2, expressed as: WQJYEQ10-1.8/33×20JB5332.2-914 Technical requirements
4.1 Materials
4.1.1 Insulation polypropylene (including modified polypropylene) shall comply with the provisions of Appendix A of this standard. 4.1.2 Insulation fusible polytetrafluoroethylene shall comply with the provisions of Appendix B of this standard. 4.2 Conductor
4,2.1 When the conductor adopts a stranded structure, its pitch diameter ratio and lay direction shall comply with the provisions of GB3957. When the conductor adopts solid round copper wire, the round copper wire shall comply with the provisions of TR type in GB3953. The individual wires in the conductor can be non-tinned or tinned copper wires. The individual wires of the conductor with polypropylene insulation shall be tinned. Tinned round copper wires shall comply with the provisions of GB4910. The individual wires with a diameter greater than 4.0mm shall comply with the provisions of Appendix H of this standard. 4,2.2 Stranded conductors can be either non-compacted or compacted. The diameter of a compacted conductor is approximately 92% of the diameter of a non-compacted conductor of the same specification.
4,2,3 The gaps between the individual wires of a stranded conductor are allowed to be filled. 4.2.4 The surface of the conductor shall be smooth without obvious corrosion and rust spots. 4,2.5 The conductor structure shall be specified in subsequent standards. 4.3 Insulation
4.3.1 Insulation thickness
The nominal thickness of insulation shall be specified in the subsequent standards. 4,3.1.1
The average insulation thickness shall not be less than the specified nominal value, and the thinnest thickness shall not be less than 90% of the nominal value minus 0.1mm. 4.3.2 Single insulation
Single insulation is composed of one of the following:
EPDM
Cross-linked polyethylene
Polypropylene
The mechanical and physical properties of EPDM and cross-linked polyethylene shall comply with the provisions of Table 1. The insulation shall be tightly wrapped on the conductor, the insulation surface shall be flat, and the cross section shall be free of pores. 4.3,3 Combined insulation
4.3.3.1 Combined insulation is composed of polyimide-fluorine 46 composite film wrapped steel round wire and extruded EPDM or wrapped (or extruded) fusible polytetrafluoroethylene.
The copper round wire wrapped with polyimide-fluorine 46 composite film shall comply with the requirements of JB5332.1~5332.4, and the model is MYFS-7.25. 4.8.38.2 The mechanical and physical properties of EPDM rubber shall comply with the provisions of Table 1. When the adhesive sealing structure cannot be sampled, the raw materials shall be used for inspection. 4.4 Insulated core voltage test
4,4.1 The insulated core shall be subjected to the AC or DC voltage test specified in Table 2, and the sample shall be immersed in warm water for at least 4 hours before the test. 4.4.2 The power frequency spark test of the insulated core specified in GB3048.9 can be used instead of the immersion voltage test, and the test voltage value is as specified in Table 3. 4.5 Inner sheath of flat cable
4.5.1 The outer surface of the insulated core of the flat cable should be covered with an inner sheath. The types and application range of the inner sheath are specified in Table 4. 3
Specimen before aging
Tensile strength
Elongation at break
Air oven heat aging test
Aging conditions
Tensile strength after aging
Elongation at break after aging
Hot extension test
Test conditions
Elongation under load
Permanent deformation after cooling
Oil resistance test (using No. 20 engine oil)
Test Conditions
Tensile strength
Elongation at break
Note: 1)
Intermediate value
Intermediate value
Rate of change
Rate of change
JB/T5332.11991
Air temperature
Loading time
Mechanical stress
Rate of change
Rate of change
E1 is used at a parallel temperature of 120℃ or below.
E2 is used at a parallel temperature of 120℃ or above and 150℃ or below. MPa
Test voltage
Rated voltage U.
Nominal insulation thickness
1.5<8≤2.0
NBR and NBR-PVC composite sheath EPDM sheath
Chlorosulfonated polyethylene sheath
Lead sheath
135±2
250±3
121±2
AC (effective value)
135±2
250±3
121±2
Cross-linked polyethylene
135±3
200±3
Applied voltage time||tt| |Effective value
Single insulation and combined insulation core
Polyimide-fluorine 46 composite film/EPDM combined insulation corePolyimide-fluorine 46 composite film/EPDM combined insulation coreCombined insulation core
4.5.2The performance of the inner sheath shall comply with the following provisionsJB/T5332.1-1991
Nitrile rubber and polyvinyl chloride composite sheath shall comply with the provisions of Appendix C of this standard; EPDM sheath shall comply with the provisions of Appendix D of this standard; Chlorosulfonated polyethylene sheath shall comply with the provisions of XH-31A type in GB759410The lead sheath is made of pure lead or lead alloy. The lead alloy shall contain 0.4% to 0.8% antimony and 0.08% or less copper, and the rest shall be lead. Lead alloys with performance not lower than this may also be used. The lead sheath shall be free of defects such as sand holes, cracks and impurities. 4.5.3The nominal thickness of the inner sheath shall be specified in subsequent standards. 4,5.4 The average value of the inner sheath thickness shall not be less than the specified nominal value, and the thickness at the thinnest point shall not be less than 80% of the nominal value minus 0.2mm. 4.5.5 The inner sheath shall be tightly wrapped on the insulation and have a smooth surface. 4.6 Oil-resistant cushion layer
4.6.1 The inner sheath of the flat electric wire core is allowed to have an oil-resistant cushion layer outside the inner sheath, which is composed of a wrapping layer and a braided layer. 4.6,2 The outer surface of the inner sheath is wrapped with polytetrafluoroethylene stretched film or other equivalent films. The nominal thickness of the film is 0.05mm. The wrapping overlap rate should be not less than 15%. The number of wrapping layers is not less than 2 layers, and 1 layer can also be wrapped, but the wrapping overlap rate should not be less than 50%. 4.6,3 The outer surface of the wrapping layer is woven with polyester yarn or nylon yarn or equivalent fibers, and the braiding density should be not less than 90%. It is allowed to use a structurally stable wrapping layer instead of a braided layer. 46.4 The thickness of the oil-resistant cushion layer should not be less than e25mm. 4.7 Cable core
4.7.1 Flat cable core
The flat cable core is composed of 3 parallel-arranged wire cores covered with inner sheath or oil-resistant cushion layer. The gaps between the wire cores are allowed to be filled with oil-resistant materials, and a layer of polyester film is allowed to be wrapped around the parallel cable cores. 4.7.2 Round cable core
The round electric core is twisted by insulated wire cores. If there is no special provision, the twisting direction is right-handed. 4.8 Round cable inner sheath
4.8, 1 The round electric core should be wrapped with an inner sheath. The sheath is allowed to have spline grooves, and the thickness of the convex part is not assessed. The type and performance of the inner sheath shall comply with the following provisions: NBR and NBR polyvinyl fluoride composite sheaths shall comply with the provisions of Appendix C of this standard; EPDM rubber sheaths shall comply with the provisions of Appendix D of this standard; and fluorosulfonated ethylene sheaths shall comply with the provisions of XH--31A type in GB7594.10. 4.8.2 The nominal thickness of the inner sheath shall be specified in subsequent standards. 4.8.8 The average value of the inner sheath thickness shall not be less than the specified nominal value, and the thickness at the thinnest point shall not be less than 80% of the nominal value minus 0.2mm. 4.9 Outer sheath
4.9.1 Armor
The flat cable core and round cable sheath shall be provided with Z-type and S-type steel belt interlocking armor layers respectively. In addition to complying with the provisions of GB2952, the armor shall also meet the following requirements.
4.9.1.1 The armor steel belt is allowed to use Ncu28-2.5-1,5 soft monel alloy steel belt that meets the provisions of GB2072. 4.8.1.2 The thickness of the steel strip is specified in the subsequent standards, and the overlap rate of the steel strip should not be less than 35%. 4.9.1.3 The galvanized steel strip after armoring should not have visible zinc layer cracking, peeling, missing plating and other phenomena. 4.9.2 Outer sheath
The outer sheath should comply with the provisions of GB2952. The thinnest thickness of the outer sheath of flat cables and round cables is 1.0mm. The mechanical properties of the outer sheath should meet the requirements of PVC-S1 in GB2952.
4.10 Finished cable
JB/T5332.11991
4.10.1 The overall dimensions of the finished cable should comply with the provisions of the subsequent standards. 4.10.2 The DC resistance of the conductor at 20C of the finished cable should comply with the provisions of the subsequent standards. The unbalance of the conductor resistance should not be greater than 3%. When measuring the unbalance, short-circuit the three-phase conductors at one end of the cable, and measure the DC resistance of the three circuits at the other end of the cable. The sample is the whole cable, and the conductor resistance unbalance is calculated as follows: Conductor resistance unbalance Circuit maximum value of the circuit Minimum resistance × 100% Circuit resistance average value
4.10.8 The insulation resistance of the finished cable at 20C shall comply with the provisions of the subsequent standards. 4.104 The leakage current of the finished cable at 15.6℃ shall comply with the following provisions; Polypropylene, cross-linked ethylene insulated cable
15kV DC voltage test value
EPDM and insulated cable
15kV DC voltage test value 1)
≤15uA/km
Note; 1) Under consideration, if it is necessary to evaluate this performance, it should be determined by negotiation between the user and the manufacturer. 4.10.5 After the finished cable sample is tested at high temperature and high pressure, the insulation resistance shall not be less than 500MQ. 4.10.6 If the finished stranded conductor cable has conductor sealing performance requirements, it shall be subjected to air differential pressure test, with a sample length of 305mm, an air pressure of 34.3kPa, and a test duration of 1h. 4.10.7 The physical and mechanical properties of the insulation shall comply with the provisions of Article 4.3.2.2 of this standard. The fusible polytetrafluoroethylene in the finished cable performance polypropylene insulation and combined insulation shall not be tested. In case of dispute, the material may be inspected in accordance with the provisions of Appendix A or Appendix B of this standard.
4,10,8 The inner sheath shall comply with the provisions of Article 4.5.2 or Article 4.8.1 of this standard. 4.10.9 The finished cable shall be subjected to the voltage test specified in Table 2. 4.10.104h High voltage test
Take 5 to 10m of finished cable, remove all outer sheaths, immerse the core in water for at least 1h, and apply 3U between the conductor and the water. The test voltage is 4h, and the test voltage of the rated voltage 3.6/6kV cable is 10,8kV. 4.10.11 The finished armored cable shall be subjected to bending test. 4.10.12 The finished outer sheath shall be subjected to the power frequency spark test of the anti-corrosion sleeve. 4.10.13 The finished cable shall have a marking tape, on which the manufacturer's name, product model and voltage shall be printed. The marking line may also be used instead of the marking tape.
4.11 Delivery length
4.11.1 The cable shall be delivered according to the length agreed by both parties. 4.11.2 The length measurement error shall not exceed ±0.5%. 5 Test methods
5.1 Special test methods are specified in the appendix of this standard. 5,2 Cable test methods are specified in subsequent standards. 6 Inspection rules
6.1 Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can leave the factory. The products leaving the factory shall be accompanied by a product quality inspection certificate. 6.2 Products shall be accepted according to the specified tests.
For the definitions of type test (T), sampling test (S) and routine test (R), please refer to GB2951.1. 6, 8 The number of samples for each batch shall be agreed upon by both parties. If the user does not make any requirements, it shall be determined by the manufacturer. 6
JB/T5332.11991
When the test results of the sampling items are unqualified, double sampling should be carried out for the second test. If it is still unqualified, 100% test should be carried out. 6.4 The appearance of the product should be checked visually (normal vision) piece by piece. 7 Packaging
7.1 The cable should be packaged in a reel and wound neatly. The distance between the outermost layer of cable and the edge of the side plate of the cable reel should be no less than 100mm, and there should be a protective iron plate on the reel.
The cable reel should comply with the provisions of GB4005 and adopt an all-steel structure. 7.2
Each cable reel should be accompanied by a label indicating
Manufacturer name
Cable model and specifications
Cable length
Gross weight kg;
Manufacture date;
An arrow indicating the correct rotation direction of the cable reel, and the number of this standard.
JB/T5332.1-1991
Material performance requirements for polypropylene (including modified polypropylene) (supplement)
Material performance requirements for polypropylene (including modified polypropylene) are shown in Table A1. Table
Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after air oven aging
Aging conditions
Tensile strength change rate
Elongation at break
Oxidation induction period
Electrical properties
200℃
Volume resistivity 20℃
Dielectric loss tangent (tg8)
50Hz or 1MHz
Dielectric constant 50Hz or 1MHz
Breakdown strength
Melt index
Brittle temperature\）
High temperature pressure test2)
Test temperature
Test time
Indentation depth
Note: 1)
135±2
Can be replaced by low temperature winding test, the nominal diameter of the conductor is 1.5~2.5mm, the nominal thickness of the insulation is 1.0~1.5mm, and the test is carried out at -35℃ according to GB2951.12
. The sample should be free of cracks. The test can also be carried out on the cable insulation core. 2)
Appendix B
Performance requirements of fusible polytetrafluoroethylene
(Supplement)
Performance requirements of fusible polytetrafluoroethylene are shown in Table B1. Table
Tensile strength
Elongation at break
Dielectric constant
Residual resistivity
300~310
JB/T5332.11991
Mechanical and physical property requirements of nitrile rubber and nitrile polyvinyl chloride composite sheaths (supplement)
Mechanical and physical property requirements of nitrile rubber and nitrile polyvinyl chloride composite sheaths are shown in Table C1. C1
Note: 1)
Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)1)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
ASTM No. 2 oil is used for arbitration.
N-butyl rubber
100±2
121±2
Requirements for mechanical and physical properties of EPDM rubber sheath (supplement)
Requirements for mechanical and physical properties of EPDM rubber sheath are shown in Table D1. No.
Energy requirements
Tensile strength at 100% elongation (fixed elongation)Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
NBR polyvinyl chloride composite
121±2
121±2
135±2
121±2
E1Testing equipment
JB/T 5332.11991
Appendix E
Test of sealing performance of stranded conductor
(Supplement)
E1.1 Air compressor (air pressure 0.5MPa, error ±5%), or other air pressure source. E1.2 Compressed gas hose connector for connecting cable core (connecting cable sample core). E1.3 Water bucket
E2 Sample preparation
Take 305mm insulated core samples from each phase of the finished cable, cut both ends neatly, and the insulation should not be scratched. Strip off the additional layer outside the insulation of one end to an appropriate length (based on the connection box connection). E3 Test steps
E3.1 Fill the bucket with water
Connect the treated end of the core to the connection box, which should be sealed and leak-proof. Put the other end of the cable core under the water in the bucket. E8.3
Start the compressor to add air pressure to the cable core through the connector. When the air pressure increases to 0.0343MPa, start timing and maintain the pressure for 1h. E4 Test results
Within 1h of pressure maintenance, no gas should come out of the water for the three samples. Appendix F
High temperature and high pressure test of finished cable
(Supplement)
F1 Test equipment
F1.1 High temperature and high pressure vessel
The high temperature and high pressure vessel can be a tubular pressure vessel or other vessels with equivalent effectiveness. The structure and heating principle of the tubular pressure vessel are shown in Figure F1. The electric buffer is allowed to be led out at one end of the vessel. The high temperature and high pressure vessel should be able to reach the pressure and temperature specified in Table F1. F1.2 Test medium
HU-20 or HU-30 turbine oil and water combination, the ratio is 1:1, a.
b. Water (tap water).
Any of the above media can be used for the test, but in the arbitration test, any one of them shall be selected by negotiation between the two parties. F1.3 Test instrument
2500V megohmmeter, groundable high resistance meter or other equivalent instrument. F2
Sample preparation
F2.1 Take a sample of about 1m from the finished cable, remove the inner sheath of the cable or the additional layer outside the lead sheath, and pay attention that the surface of the inner sheath should not be damaged. Remove about 20mm of insulation and not less than 50mm of sheath from the three cores or one end of a single core. 1012
It is stipulated that the test should be conducted at -35℃, and the sample should be free of cracks. The test can also be conducted on the cable insulation core. 2)
Appendix B
Performance requirements of fusible polytetrafluoroethylene
(Supplement)
Performance requirements of fusible polytetrafluoroethylene are shown in Table B1. Table
Tensile strength
Elongation at break
Dielectric constant
Residual resistivity
300~310
JB/T5332.11991
Mechanical and physical performance requirements of nitrile rubber and nitrile polyvinyl chloride composite sheath (Supplement)
Mechanical and physical performance requirements of nitrile rubber and nitrile polyvinyl chloride composite sheath are shown in Table C1. C1
Note: 1)
Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)1)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
ASTM No. 2 oil is used for arbitration.
N-butyl rubber
100±2
121±2
Requirements for mechanical and physical properties of EPDM rubber sheath (supplement)
Requirements for mechanical and physical properties of EPDM rubber sheath are shown in Table D1. No.
Energy requirements
Tensile strength at 100% elongation (fixed elongation)Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
NBR polyvinyl chloride composite
121±2
121±2
135±2
121±2
E1Testing equipment
JB/T 5332.11991
Appendix E
Test of sealing performance of stranded conductor
(Supplement)
E1.1 Air compressor (air pressure 0.5MPa, error ±5%), or other air pressure source. E1.2 Compressed gas hose connector for connecting cable core (connecting cable sample core). E1.3 Water bucket
E2 Sample preparation
Take 305mm insulated core samples from each phase of the finished cable, cut both ends neatly, and the insulation should not be scratched. Strip off the additional layer outside the insulation of one end to an appropriate length (based on the connection box connection). E3 Test steps
E3.1 Fill the bucket with water
Connect the treated end of the core to the connection box, which should be sealed and leak-proof. Put the other end of the cable core under the water in the bucket. E8.3
Start the compressor to add air pressure to the cable core through the connector. When the air pressure increases to 0.0343MPa, start timing and maintain the pressure for 1h. E4 Test results
Within 1h of pressure maintenance, no gas should come out of the water for the three samples. Appendix F
High temperature and high pressure test of finished cable
(Supplement)
F1 Test equipment
F1.1 High temperature and high pressure vessel
The high temperature and high pressure vessel can be a tubular pressure vessel or other vessels with equivalent effectiveness. The structure and heating principle of the tubular pressure vessel are shown in Figure F1. The electric buffer is allowed to be led out at one end of the vessel. The high temperature and high pressure vessel should be able to reach the pressure and temperature specified in Table F1. F1.2 Test medium
HU-20 or HU-30 turbine oil and water combination, the ratio is 1:1, a.
b. Water (tap water).
Any of the above media can be used in the test, but in the arbitration test, any one of them shall be selected by negotiation between the two parties. F1.3 Test instrument
2500V megohmmeter, groundable high resistance meter or other equivalent instrument. F2
Sample preparation
F2.1 Take a sample of about 1m from the finished cable, remove the inner sheath of the cable or the additional layer outside the lead sheath, and pay attention that the surface of the inner sheath should not be damaged. Remove about 20mm of insulation and not less than 50mm of sheath from the three cores or one end of a single core. 1012
It is stipulated that the test should be conducted at -35℃, and the sample should be free of cracks. The test can also be conducted on the cable insulation core. 2)
Appendix B
Performance requirements of fusible polytetrafluoroethylene
(Supplement)
Performance requirements of fusible polytetrafluoroethylene are shown in Table B1. Table
Tensile strength
Elongation at break
Dielectric constant
Residual resistivity
300~310
JB/T5332.11991
Mechanical and physical performance requirements of nitrile rubber and nitrile polyvinyl chloride composite sheath (Supplement)
Mechanical and physical performance requirements of nitrile rubber and nitrile polyvinyl chloride composite sheath are shown in Table C1. C1
Note: 1)
Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)1)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
ASTM No. 2 oil is used for arbitration.
N-butyl rubber
100±2
121±2
Requirements for mechanical and physical properties of EPDM rubber sheath (supplement)
Requirements for mechanical and physical properties of EPDM rubber sheath are shown in Table D1. No.
Energy requirements
Tensile strength at 100% elongation (fixed elongation)Mechanical properties before aging
Tensile strength
Elongation at break
Mechanical properties after aging
Aging conditions
Change rate of tensile strength
Change rate of elongation at break
Oil resistance test (using No. 20 engine oil)
Test conditions
Change rate of tensile strength
Change rate of elongation at break
NBR polyvinyl chloride composite
121±2
121±2
135±2
121±2
E1Testing equipment
JB/T 5332.11991
Appendix E
Test of sealing performance of stranded conductor
(Supplement)
E1.1 Air compressor (air pressure 0.5MPa, error ±5%), or other air pressure source. E1.2 Compressed gas hose connector for connecting cable core (connecting cable sample core). E1.3 Water bucket
E2 Sample preparation
Take 305mm insulated core samples from each phase of the finished cable, cut both ends neatly, and the insulation should not be scratched. Strip off the additional layer outside the insulation of one end to an appropriate length (based on the connection box connection). E3 Test steps
E3.1 Fill the bucket with water
Connect the treated end of the core to the connection box, which should be sealed and leak-proof. Put the other end of the cable core under the water surface of the bucket. E8.3
Start the compressor to add air pressure to the cable core through the connector. Start timing when the air pressure increases to 0.0343MPa and maintain the pressure for 1h. E4 Test results
Within 1h of pressure maintenance, no gas should come out of the water for the three samples. Appendix F
High temperature and high pressure test of finished cable
(Supplement)
F1 Test equipment
F1.1 High temperature and high pressure vessel
The high temperature and high pressure vessel can be a tubular pressure vessel or other vessels with equivalent effectiveness. The structure and heating principle of the tubular pressure vessel are shown in Figure F1. The buffer is allowed to be led out at one end of the vessel. The high temperature and high pressure vessel should be able to reach the pressure and temperature specified in Table F1. F1.2 Test medium
HU-20 or HU-30 turbine oil and water combination, the ratio is 1:1, a.
b. Water (tap water).
Any of the above media can be used in the test, but in the arbitration test, any one of them shall be selected by negotiation between the two parties. F1.3 Test instrument
2500V megohmmeter, groundable high resistance meter or other equivalent instrument. F2
Sample preparation
F2.1 Take a sample of about 1m from the finished cable, remove the inner sheath of the cable or the additional layer outside the lead sheath, and pay attention that the surface of the inner sheath should not be damaged. Remove about 20mm of insulation and not less than 50mm of sheath from the three cores or one end of a single core. 10
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