JB/T 2171-1999 Agricultural direct-buried aluminum core plastic-insulated plastic-sheathed wire with rated voltage of 450/750V and below
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T2171
450/750V
1999-08-06
2000-01-01
JB/T2171
This standard is a revision of JB2171-85k rated voltage 450/750V and below agricultural direct buried aluminum core plastic insulated plastic sheathed wire. Appendix A of this standard is the appendix of the standard.
This standard replaces JB2171-85 from the date of implementation. This standard is proposed and managed by the National Wire and Cable Standardization Technical Committee. The drafting unit of this standard: Shanghai Cable Research Institute. The main drafter of this standard: Zhou Tongde
1 Fanquan
Chicken cheek Xinkui Lu Wa Art Group
Chicken 450/750V Chicken Can
JB/T2171
Both JB217185
This standard specifies the technical requirements, test methods, inspection rules, delivery length, marking and packaging of agricultural direct buried aluminum core plastic insulated plastic sheathed wires with rated voltage of 450/750V and below. This standard applies to rural underground direct buried power lines, aluminum core plastic insulated plastic sheathed wires (referred to as agricultural buried wires) used for connecting fixed distribution lines and electrical equipment with AC rated voltage U./U of 450/750V and below. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, 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/T 2900.10—1984
Electrical terminology-Electrical wires and cables
GB/T 2951—1997
GB/T 2952—1989
GB/T 3048—1994
GB/T 3956—1997
GB/T 4909—1985
JB/T 8137--1999
General test methods for cable insulation and sheath
Outer sheath of electric rope
Test methods for electrical properties of wires and cables
Conductors of cables
Test methods for bare wires
Delivery trays of wires and cables
3 Terms, symbols, codes and product representation methods 3.1 Terms
The terms and definitions of this standard are explained in GB/T2900.10. 3.2 Symbols and codes
3.2.1 Series codes
Agricultural straight wires
3.2.2 Conductor codes
Aluminum conductor
3.2.3 Insulation code
Polyethylene
Polyvinyl chloride
3.2.4 Sheath code
Polyethylene
Polyvinyl chloride
Wa Extremely slow 1999-08-06 tumor
2000-01-01 small cable
3.2.5 Environmental resistance characteristic code
+*++*+1*1++P++
Anti-white mosquito
3.3 Product representation method
JB/T2171
Cables are represented by model, nominal section and standard number. For example, agricultural direct buried aluminum core polyethylene insulation, polyurethane sheathed wire, nominal section 25mm, expressed as:
NLYV25JB/T2171-1999
4 Model
The model of the wire is shown in Table 1
NLYV-H
NLYV-Y
NLVV-Y
5 Specification
Agricultural direct buried aluminum core polyethylene insulation, polyurethane sheathed wire, agricultural direct buried aluminum core polyethylene insulation, cold-resistant polyvinyl chloride sheathed wire, agricultural direct buried aluminum core polyethylene insulation, anti-recovery polyvinyl chloride sheathed wire, agricultural direct buried aluminum core polyethylene insulation, black polyethylene sheathed wire, agricultural direct buried aluminum core polyvinyl chloride insulation, polyvinyl chloride sheathed wire, agricultural direct buried aluminum core polyvinyl chloride Polyethylene contact edge, mosquito-proof polyoxyethylene protective wire and wire specifications are shown in Table 2.
NLYV-H
NLYV-Y
Technical requirements
6.1 Conductor
Rated voltage
450/750
Nominal cross section
Rated voltage
450/750
Applicable areas
General areas
General and Seleng areas
General areas
General areas
Nominal cross section
6.1.1 Conductor Solid conductor, national stranded conductor or compact round stranded conductor are allowed. The conductor shall comply with the provisions of GB/T3956. 6.1.2 The conductor structure shall comply with the provisions of Table 3.6.2 Insulation
6.2.1 The insulation of NLYV, NLYV-H, NLYV-Y, NL.YY type wires shall be PE type, and the insulation of NLVV, NLVV-Y type wires shall be PVC-II type: The insulation performance shall comply with the provisions of Table 4.
6.2.2 The average insulation thickness shall not be less than the nominal insulation thickness value specified in Table 3, and the thickness at the thinnest point shall not be less than 90% of the nominal value-0.1mm.
The insulation thickness measurement shall take a cable sample at 3 locations at least 1m apart. Take 3 insulation samples for each insulated core, and measure the average value of 18 values (expressed in mm), which shall be calculated to 2 decimal places, and rounded according to the following provisions, and then take this value as the average insulation thickness. When calculating, if the second decimal place is 5 or greater than 5, the first decimal place shall be rounded up by 1. For example, 1.74 should be rounded to 1.7, and 1.75 should be rounded to 1.8. The minimum value of all measured values in JB/T21711999 should be taken as the minimum thickness of insulation at any location. 6.2.3 The insulation should be tightly packed on the conductor and should be easy to peel off without damaging the insulator and conductor. The insulation surface should be flat and uniform in color, without mechanical damage and bubbles.
Abalone standard
Root/single line
Nominal standard
Test items
Tensile strength and elongation at break
Original properties
Tensile strength,
Elongation at break,
Air box heat aging test:
Treatment degree
Treatment time
Tensile strength:
Change.
Elongation at break
Change rate,
loss test
Processing temperature
Processing time
Weight loss, maximum
anti-cracking test
Bounce temperature
Processing time
Test results
High temperature pressure test
Processing temperature
Deformation rate.
Low Si coil burning test
Temperature
Test results
Low temperature tensile test
Treatment temperature
Elongation,
Sheath nominal
Average outer diameter
Phi pressed
Conductive wire core
Conductive plastic core
At 20℃
Not more than
Insulating resistance is not less than
Mn·km
NLYY, NEYV-H
NLYV, NEYY-Y
NLVV-Y
Performance requirements
PVC-11
150±3
No cracking
-15±2
No cracking
—15±2
70'℃
20, elongation without cracking
Test items
Low temperature impact test
Treatment temperature
Test results
Oxidation induction period (200℃) minimum
Melt efficiency
JB/T21711999
Table 4 (end)
g/10min
0, 25~2. 0
Performance requirements
PVC-I1
—15±2
No cracking
6.2.4 The insulated wire core shall be able to withstand the AC 50Hz spark test specified in B/T3048.9 as an intermediate test. The spark test voltage shall comply with the provisions of Table 5.
Insulation thickness 6
6.3 Sheath
Test voltage (effective value)
6.3.1 Different types of wires shall use different sheaths. NLYV, NLVV
NLYV-H
NLYV--Y,NLVV--Y
SIe++e
The sheath performance shall comply with the requirements of Table 6.
Test items
Tensile strength and elongation at break
Original properties
Tensile strength
Elongation at breakbzxZ.net
Heat aging test in air box:
Treatment temperature
Treatment time
Tensile strength,
Rate of change,
Elongation at break,
Rate of change,
Weight loss test
Treatment temperature
Treatment time
Anti-cracking test
Treatment temperature
Treatment time
Test results
Nominal thickness of insulation 6
1. 5≤8<2. 0
Test voltage (effective value)
PVC—S1 type
PVC--II Type
PVC--Y type
PE--S type
Performance requirements
PVc--S1
150±3
No cracking
150±3
No cracking
Test items
High temperature pressure test
Processing temperature
Deformation rate,
Low temperature coiling test
Processing temperature
Test results
Low temperature tensile test
Processing temperature
Elongation,
Low temperature impact test
Processing temperature
Test results||tt| |Biological determination KT50
Environmental stress cracking
JB/T2171
Table 6 (end)
PVC--S1
—15±2
No cracking
—15±2
No cracking
Performance requirements
—25±2
No cracking
—25±2
No cracking
6.3.2 The average value of the sheath thickness shall not be less than the nominal value of the sheath thickness specified in Table 3, and the thickness of the thinnest point shall not be less than 85% of the nominal value 0.1 mm.
A section of cable sample shall be taken at 3 locations at least 1m apart. The average value of all values (expressed in mm) measured from the three sections of the jacket should be calculated to 2 decimal places, and rounded as follows, and then the value is taken as the average value of the jacket thickness. When calculating grams, if the second decimal place is 5 or greater than 5, the first decimal place should be rounded up to 1. For example, 1.74 should be rounded to 1.7, and 1.75 should be rounded to 1.8.
The minimum value of all measured values should be taken as the minimum thickness of any insulation. 3.3 The jacket should be tightly wrapped on the conductor and should be easy to peel off without damaging the insulation. The jacket surface should be flat and uniform in color, without mechanical damage and air pockets.
6.3.4 The jacket color should preferably be black. 6.4 Finished wires
6.4.1 The outer diameter of the wire shall comply with the provisions of Table 3. The difference between the maximum outer diameter and the minimum outer diameter measured on the surface of the wire (F value> shall not exceed 15% of the upper limit of the average outer diameter specified in Table 3. Measure two places and take the maximum difference. 6.4.2 The conductor resistance of the wire shall comply with the provisions of Table 3. 6.4.3 The wire shall be subjected to the AC 50Hz voltage test specified in Table 7. Table?
Test conditions
Finished cable voltage test
Specimen length
Immersion time, minimum
Test voltage
Voltage over time
Finished cable insulation Core voltage test
Minimum sample length
Minimum immersion time
Test voltage
Minimum voltage application time
Performance change
Manufacturing length
JB/T21711999
6.4.4 The insulation resistance of the wire shall comply with the provisions of Table 3. At 20C, the insulation resistance shall be tested on each manufacturing length. At 70C, the insulation resistance test shall be carried out on the awl core after the voltage test specified in Table 7 No. 2 according to Table 8. Table 8
Test specimen
Minimum test length
Minimum immersion time
6. 4.3 Temperature alternation test
Performance requirements
The wire shall be subjected to a temperature alternation test with an ambient temperature of 50°C to -50°C and a relative condensation degree of air of 98% and a temperature of 5°C to 5°C. The test shall be carried out in the following manner: take a 3m long finished wire, bend it into a circle with a diameter of not less than 0.5m, place it at 50±3°C for 1h, then place it at -50±3°C for another 1h, and then place the sample in a climate box with a relative humidity of 90% and a temperature of 35±3°C for 1h. After this, the sample shall be able to withstand a 50 Hz AC voltage of 2.5 kV applied according to GB/T 3048.8 for 5 min No breakdown. 6.4.6 Current heating test
The wires shall be subjected to current heating test. The test shall be carried out as follows: the finished wires with a maximum length of 1.5m shall be bent into a U shape with a bending diameter of 0.5m, and the conductor temperature shall be heated by current to reach 70±3℃ and maintained for 3h. At this time, the surface temperature of the wire shall not be lower than 50±3℃, and then the heating shall be stopped: and the sample shall be maintained at room temperature for not less than 1h, and then a 50Hz AC voltage of 2.5kV shall be applied according to GB/T3048.8. No breakdown shall occur after the test for 5min.
6.4.7 Short-circuit current test
The wire should be subjected to short-circuit current test. The test is carried out as follows: take a 1.5m long finished wire, bend it into a U shape with a bending diameter of 0.5m, and subject it to short-circuit current cycle heating for 5s each time at room temperature for a total time of no more than 5h. Each heating makes the wire conductor temperature rise to 130±2°C. After each heating, the sample should be cooled to room temperature for five cycles. After heating, the wire should be placed under room temperature for 1h, and then apply 50H AC voltage 2.5kV according to GB/T3048.8. The test should not be broken for 5min. 6.4.8 The printed mark of the wire should be resistant to abrasion. After gently rubbing it with a ball of soaked absorbent cotton or a piece of cotton cloth for 10 times, the mark should still be clearly visible. Inspection Specifications
7.1 Products can only be shipped after passing the inspection of the manufacturer. Each batch of products shipped should be accompanied by the manufacturer's product quality inspection certificate. 7.Z Products shall be inspected according to the specified tests. The number of samples for each batch shall be agreed upon by both parties. If the user does not make any request, if the test results of the sample inspection items specified by the manufacturer are unqualified, double sampling shall be carried out for the unqualified items for a second test. If they are still unqualified, the whole batch of products shall be tested again.
7.3 The appearance of the products shall be inspected with normal visual inspection. 7.4 Products shall be inspected according to the provisions of Table 9.
Inspection items
Structure and size inspection
Conductor structure
Insulation degree
Sheath thickness
1.4 outer diameter
Conductor resistance test
Product voltage test
Finished wire
Finished wire insulation core
Insulation resistance test
Insulation resistance test at 20℃
Insulation resistance test at 70℃
Insulation physical and mechanical properties test
Tensile strength before and after aging
Elongation at break before and after aging
Weight loss test
High temperature pressure test
Low temperature winding test
Low temperature tensile test
Low temperature impact test
Anti-cracking test
Oxidation induction period test
Body index test
Physical and mechanical properties test
Tensile strength before and after aging
Breaking elongation before and after aging
Weight loss test
Anti-cracking test
High temperature pressure test
Low temperature test
Low temperature tensile test
Low temperature impact test
Biological assay test
6.10 Environmental stress cracking resistance test
Temperature alternation test
Current heating test
Short circuit current test
Printed mark abrasion resistance test
Standard bar
StThis standard stipulates that it is 6 months.
JB/T21711999
Test type
T, St
IT, st
T, st
T, St
2 No. 3.1 Finished wire test The number of tests can be reduced according to the agreement between the user and the manufacturer. E
Test method
GB/T 4909.2
GE/T 2951.1
GB/T 2951.1
GB/T 2951.1
GB/T 2951.1
GB/T 3048. 4
GB/T 3048.B
GB/T 3048, 8
CB/T 3048. 5 or. 6
GB/T 3048. 5 or. 5
GB/T 2951. 1 and.2
GB/T 2951. 1 and, 2
GB/T 2951. 7
GE/T 2951. 6
GB/T 2951. 4
GB/T 2951. 4
GB/T 2951.4
G8/T 2951.6
GB/T 2951.37
GB/T 2951.8|| tt||GB/T 2951.1 and. 2
GB/T 2951.1 and - 2
GB/T 2951..?
GB/T 2551. 6
GB/T 2951. 6
GB/T 2951. 4
GB/T 2951. 4
GB/T 2951. 4
Appendix A||tt| |GB/T 2951.8
8 Delivery length
JB/T21711999
81 The delivery length of the wire shall not be less than 200m. For wires with a conductor surface of 10mm or less, short sections of wires not shorter than 50m are allowed. The quantity of the finished wires delivered shall not exceed 10% of the total length of the wires delivered. &.2 According to the agreement between the two parties, any length of finished wires can be delivered. 8.3 The measurement error of the length of the finished wires shall not exceed ±0.5%, 9 Marking 9.1 The surface of the sheath of the finished wire should have the manufacturer's name and model, or the manufacturer's name, model and voltage in a continuous pattern. The marking should be clear and recognizable, and resistant to abrasion. It can be printed on the insulation or sheath, or it can be stamped on the sheath using a concave or convex die. 9.3 allows the use of marking tape, which should be placed continuously between the insulation and the sheath. The marking tape should be printed with Manufacturer name, product model and voltage. The thickness of the marking tape should not exceed 0.05 mm and the width should not exceed 5 mm. 9. The distance between a complete end and the beginning of the next mark should not exceed 500 mm on the sheath and No more than 200mm, the marking tape should not exceed 200mm9.5 The coiled or coiled wires should be neatly wound and properly packaged. The cable reels should comply with the provisions of JB/T8137. 9.6 Each coil or reel should be labeled and marked ：Manufacturer's name, stock trademark
b) Wire model and specification (conductor structure): mm\c) Rated voltage: V;
d) Length, mt
e) Volume ：kg+
Date of manufacturing, year, month:
g) Standard number, JB/T2171—1999
b) Correct rotation direction of the cable reel.
9.7 When packing, the box shell should be marked with: a) Manufacturer name:;
b) Product model, specification and rated voltage: mm, V: e) Box size and Weight: mmXmmXmm, kg#d) Anti-traceability, anti-throwing standard.
10 Usage Guidelines
The rated voltage of the wire is U./U is 450/750V
The rated voltage is the wire Quasi-voltage for design and electrical performance test, expressed as U./U, unit: V. U is the effective value of the voltage between any two phase conductors in the wire system. U. Any insulated conductor and "ground" (gold fan shield The effective value of the voltage between the wire and the metal sheath or the surrounding medium. When the wire is used in an AC system, the rated voltage of the wire should not be less than the nominal voltage of the system. When used in a DC system, the nominal voltage of the system should be Not more than 1.5 times the rated voltage of the wire. The operating voltage of the system is allowed to be no more than 10% of the nominal voltage. 10.2 The long-term working temperature of the wire should not exceed 70℃. 16.3 The ambient temperature of the wire during installation should not be lower than 0℃. The allowable bending radius is: the wire with a conductor nominal cross-section of 35 mm or less should be no less than 6 D. The conductor nominal cross-section of the wire is 50mm* or less, and should not be less than 8D (D wire outer diameter: mm). 10.4 The depth of the wire should be greater than 0.8m. In areas where the frozen soil depth is greater than 0.8m, it should be laid in Below the frozen soil layer. 8
A1 Scope of application
JB/T2171
Thanks A
【Appendix to the standard】
Mosquito-proof sheath material Bioassay method
This test method is suitable for the bioassay of anti-mosquito sheath materials. A2 Test conditions
The test should be carried out at 25±1°C.
Each piece should be artificially tested with not less than 20 house termite workers of 10 months. A2.2
A3 Sample preparation
The anti-termite sheath material should be pressed into a 1mm original test piece. Test steps
Place a glass or hard plastic ring with an inner diameter of 40mm on the sample. Put termites in the test tube and record the time (min) when the number of termites reaches 50% (i.e. 10 termites).
A5 Test results and requirements
Test results Take three samples and record the arithmetic time The average initial KT50(min) is not more than 400(min)
After heat treatment (80℃×7d), KT50(min) is not more than 800min). 9
Shu Yingjia
Xin Kui Lu
450/750V Suiba
JB/T2171
Chu880b1230
19XX Nest XX Cabin
100044
Dai Duan x/X
Rectangle XXX.XXX
19XX Nest XX Ridge
Purchase XXX.XX Guest
Pengxian Jiji Wantie5 The coiled or coiled wires should be wound neatly and properly packaged. The cable reels should comply with the provisions of JB/T8137. 9.6 Each coil or reel should be labeled and marked with: manufacturer name and trademark
b) Wire model and specification (conductor structure): mm\c) Rated voltage: V;
d) Length, mt
e) Weight: kg+
Date of manufacture, year and month:
g) Standard number, JB/T2171—1999
b) Correct rotation direction of the cable reel.
9.7 When packing, the outer shell of the box should be marked with: a) Manufacturer name:;
b) Product model, specification and rated voltage: mm, V: e) Box size and weight: mmXmmXmm, kg#d) Anti-tracing and anti-throwing mark.
10 Guidelines for use
The rated voltage U./U of the wire is 450/750V
The rated voltage is the quasi-voltage used for wire design and electrical performance testing, expressed as U./U, unit: V. U is the effective value of the voltage between any two-phase conductors in the wire system. U. is the effective value of the voltage between any insulated conductor and the "ground" (metal shield, metal sheath or surrounding medium). When the wire is used in an AC system, the rated voltage of the wire should not be less than the nominal voltage of the system. When used in a DC system, the nominal voltage of the system should not be greater than 1.5 times the rated voltage of the wire. The operating voltage of the system is allowed to exceed 10% of the nominal voltage. 10.2 The long-term operating temperature of the wire should not exceed 70℃. 16.3 The ambient temperature during the installation of the wire should not be lower than 0'℃, and the allowable bending rate is: the wire with a nominal conductor section of 35 mm and below should not be less than 6D. The wire with a nominal conductor section of 50mm* and below should not be less than 8D (D wire outer diameter: mm). 10.4 The installation depth of the wire should be greater than 0.8m. In areas where the frozen soil layer is greater than 0.8m, it should be laid below the frozen soil layer. 8
A1 Scope of application
JB/T2171
Thanks A
【Appendix to the standard】
Biological determination method of anti-mosquito sheath material
This test method is applicable to the biological determination of anti-white mosquito sheath material. A2 Test conditions
The test should be carried out at 25±1°C.
Each piece should be artificially tested with not less than 20 workers of 10-month-old house termites. A2.2
A3 Sample preparation
The anti-termite sheath material should be pressed into a 1mm original test piece. Test steps
Place a glass or hard plastic ring with an inner diameter of 40mm on the sample, put termites in it, and record the time (min) when the termites reach 50% (i.e. 10 heads).
A5 Test results and requirements
Test results Take the arithmetic mean of the recorded time of three samples (initial KT50 (min) is not less than 400 (min))
After heat treatment (80℃×7d), KT50 (min) is not more than 800min). 9
Shu Yingqia
Xin Kui Lu
450/750V Suiba
JB/T2171
Chu880b1230
19XX Nest XX Cabin
100044
Dai Duan x/X
Rectangle XXX.XXX
19XX Nest XX Ridge
Purchase XXX.XX Guest
Peng Xian Ji Key Wantie5 The coiled or coiled wires should be wound neatly and properly packaged. The cable reels should comply with the provisions of JB/T8137. 9.6 Each coil or reel should be labeled and marked with: manufacturer name and trademark
b) Wire model and specification (conductor structure): mm\c) Rated voltage: V;
d) Length, mt
e) Weight: kg+
Date of manufacture, year and month:
g) Standard number, JB/T2171—1999
b) Correct rotation direction of the cable reel.
9.7 When packing, the outer shell of the box should be marked with: a) Manufacturer name:;
b) Product model, specification and rated voltage: mm, V: e) Box size and weight: mmXmmXmm, kg#d) Anti-tracing and anti-throwing mark.
10 Guidelines for use
The rated voltage U./U of the wire is 450/750V
The rated voltage is the quasi-voltage used for wire design and electrical performance testing, expressed as U./U, unit: V. U is the effective value of the voltage between any two-phase conductors in the wire system. U. is the effective value of the voltage between any insulated conductor and the "ground" (metal shield, metal sheath or surrounding medium). When the wire is used in an AC system, the rated voltage of the wire should not be less than the nominal voltage of the system. When used in a DC system, the nominal voltage of the system should not be greater than 1.5 times the rated voltage of the wire. The operating voltage of the system is allowed to exceed 10% of the nominal voltage. 10.2 The long-term operating temperature of the wire should not exceed 70℃. 16.3 The ambient temperature during the installation of the wire should not be lower than 0'℃, and the allowable bending rate is: the wire with a nominal conductor section of 35 mm and below should not be less than 6D. The wire with a nominal conductor section of 50mm* and below should not be less than 8D (D wire outer diameter: mm). 10.4 The installation depth of the wire should be greater than 0.8m. In areas where the frozen soil layer is greater than 0.8m, it should be laid below the frozen soil layer. 8
A1 Scope of application
JB/T2171
Thanks A
【Appendix to the standard】
Biological determination method of anti-mosquito sheath material
This test method is applicable to the biological determination of anti-white mosquito sheath material. A2 Test conditions
The test should be carried out at 25±1°C.
Each piece should be artificially tested with not less than 20 workers of 10-month-old house termites. A2.2
A3 Sample preparation
The anti-termite sheath material should be pressed into a 1mm original test piece. Test steps
Place a glass or hard plastic ring with an inner diameter of 40mm on the sample, put termites in it, and record the time (min) when the termites reach 50% (i.e. 10 heads).
A5 Test results and requirements
Test results Take the arithmetic mean of the recorded time of three samples (initial KT50 (min) is not less than 400 (min))
After heat treatment (80℃×7d), KT50 (min) is not more than 800min). 9
Shu Yingqia
Xin Kui Lu
450/750V Suiba
JB/T2171
Chu880b1230
19XX Nest XX Cabin
100044
Dai Duan x/X
Rectangle XXX.XXX
19XX Nest XX Ridge
Purchase XXX.XX Guest
Peng Xian Ji Key Wantie
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