JB/T 866-1999 Copper core paper insulated star twisted lead sleeve high frequency symmetrical communication cable

This standard specifies the technical requirements, test methods, inspection rules, delivery length, packaging and marking of copper core paper insulated star twisted lead sheathed symmetrical communication cables. This standard applies to copper core paper insulated star twisted lead sheathed symmetrical communication cables. The transmission frequencies of cable carrier communication in this standard are: 252 kHz, 15 6k Hz, 12 3k H: three types; the power supply voltage of the line is AC 50 Hz, 500 V or DC 700 V or less. JB/T 866-1999 Copper core paper insulated star twisted lead sheath high frequency symmetrical communication cable JB/T866-1999 standard download and decompression password: www.bzxz.net

People's Republic of China Press Machinery Ring Industry Standard JB/T8661999
1999-08-064
Double
Female
2000-01-01
JB/T866±1999||tt| |e
This standard is a revision of JB866-81 "Copper core paper insulated star twisted lead sleeve high frequency symmetrical communication cable. This standard will replace JB866-81 from the date of implementation. This standard is proposed and administered by the National Technical Committee for Standardization of Wires and Cables. This standard was drafted by: Shanghai Cable Factory, Xi'an Cable Factory, Chengdu Cable Factory, Houma Cable Factory and Shanghai Cable Research Institute. The main drafters of this standard: Zhu Denghe, Yan Ruiqing, Liu Furong, Zhao Zhanwei, Lu Qisong1
G20 xpe/
JB/T8661999||tt| |JB86681
This standard specifies the technical requirements, test methods, inspection rules, delivery length, packaging and marking of copper core paper insulated star twisted lead sheathed symmetrical communication cables.
This standard applies to copper core paper insulated star twisted lead sheathed symmetrical communication cables. The transmission frequencies of cable carrier communication in this standard are: 252, 156 and 123kHz; the power supply voltage of the line is AC 50Hz, 500V or DC 700V or less.
2 Reference standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T469—1995
GB/T2952—1989
GB/T3048—1994
GB/T3953—1983
GB/T5441——1985||tt| |Lead ingot
Cable outer sheath
Electrical performance test method for wires and cables
Electrical round copper wire
Test method for communication cables
GB/T6109. 7-1990 Enameled round winding wire 130 grade polyester enameled copper round wire JB5268.2--1991
JB/T8137-1999
Cable metal sheath lead sheath
Wire and cable exchange Pallet
3 symbols, codes and product representation methods
3.1 symbols, codes
3.1.1 series codes
3.1.2 structure and insulation codes||tt| |Symmetric structure
Paper insulation...
3.1.3 Metal sleeve code
Lead sleeve
3.k4 Outer sheath code||tt ||3.2 Product Representation Method
Provincial Road
According to GB/T2952
Cable model, transmission frequency, star twist group number, signal line number and standard number. For example: copper core paper insulated star twisted lead sheathed steel tape armored PVC sheathed high frequency symmetrical communication cable 7 star twisted groups, 6 signal lines, expressed as: HEQ22-2527X4X1.2+6X0.9JB/T866-- 1999麺www.bzxz.net
1999-08-06rat
2000-01-01
4 model
The cable model is shown in Table 1.
HEQ33|| tt||HEQ41
5 specifications
JB/T8661999
Table 1
Copper core paper insulated star twisted bare lead sleeve high frequency symmetrical communication cable copper core paper insulated star twisted lead sleeve PVC sleeve high frequency symmetrical communication cable copper core paper insulated star twisted lead sleeve Polyethylene sheathed high frequency symmetrical communication cable
Copper core paper insulated star pattern lead sheath steel tape armored sheath PVC sheath high frequency symmetrical communication cable copper core paper insulated star twisted lead sheath steel tape inscribed polyethylene sheath High frequency symmetrical communication cable copper core paper insulated star lead sheath fine steel wire PVC sheath High frequency communication cable copper core paper insulated star lead sheath fine steel wire armored polyethylene sheath high frequency communication cable copper core paper insulated star lead Thick steel wire armored fiber jacket high frequency communication cable copper core paper insulated star strand lead sheath thick steel wire armored PVC sheath high frequency communication cable copper core paper insulated star strand lead sheath thick steel wire armored polyethylene sheath high frequency communication The number of wire groups of cable 5.1 is one, three, four and seven star twisted groups. 5.2 frequencies are 252, 156 and 123kHz. 5.3 According to the user's needs, 26 signal lines can be added to the cable. 6 Technical Requirements
6.1 Conductor
6.1.1 The conductor of the twisted group adopts soft copper wire with a nominal diameter of 1.20mm. 6.1.2 The signal line conductor single group cable adopts enameled round wire with a nominal diameter of 0.60mm. Multiple sets of cables use soft copper wires with a nominal diameter of 0.90mm, of which the red and green wires are enameled round copper wires. Enameled round copper wire should comply with GB/T6109.7 regulations. 6.2 Insulation
6.2.1 The insulated core of the star twisted group is insulated with paper rope and paper tape. The overlap rate of paper tape wrapping should be no less than 15% when wrapping one layer, and not less than 10% when wrapping two layers. The color of the outer paper tape should be obvious and comply with the chromatographic requirements in Figure 1. 6.2.2 Signal lines are insulated with paper.
Portuguese
Figure 1A star twist group chromatogram
6.3 twist
The four insulated wire cores in the 6.3.1 star twist group press The chromatogram is red, green, yellow (natural color), and blue, as shown in Figure 1. Pad cores can also be added. The red and yellow, green and blue wire cores at diagonal position 2
JB/T866±1999
each form a working pair. Looking towards end A, the green wire core should be on top of the red wire core. Clockwise to the side. Colored cotton yarn or other colored fiber materials should be loosely wound around the outside of the star twist group, and the color should comply with the chromatographic requirements in Figure 2. 6.3.2 The star twisted group and the signal wire in the cable core are twisted to the right in concentric circles, as shown in Figure 2. Looking towards the cable A end, the green star twisted group should be on the clockwise side of the red star twisted group. The stranding pitch of each star strand group within the same cable should be different from each other. After the cable is formed, it should be wrapped with at least two layers of cable paper tape. 6.3.3 The color of the paper tape and yarn should still be identifiable after 1 minute at +190°C. Yellow
Single-group cable
(Yellow) White
Three-group cable
Figure 2 A-end cable core chromatogram| |tt||Yellow
Four sets of cables
Yellow
Green Asia
Seven sets of cables||tt| |6.4 A length of marking tape with the factory name and year of manufacture should be placed vertically inside the cable. The year of manufacture can also be printed on the bag tape. 6.5 Lead sheath
6.5.1 The thickness of the lead sheath shall comply with the requirements in Table 2. Number of wire groups
One star twisted group
Three star twisted groups
Four wire groups
Seven star twisted groups
Most||tt ||small
standard
JB/T8661999||tt ||Table 2
HEQQ2, HQ03, HEQ22, HEQ23
Weight
1.60||tt| |1.60
Note : The minimum lead sheath thickness in the table does not apply to the joints when the lead pressing machine is parked. 6.5.2 The alloy composition of the lead sheath should comply with the provisions of 4.1 in JB5268.2--1991. 6.5.3 When the inner diameter of the lead sleeve is greater than 15mm, it shall undergo an expansion test. 6.5.4 The lead sleeve should be sealed.
6.6 Outer sheath
The outer sheath of the cable shall comply with the regulations of GB/T2952. 6.7 Electrical performance
The electrical performance of the cable should comply with the requirements in Table 3. Table 3
Serial number
Project name
DC resistance at 20℃ is not greater than
1) Single wire: 1.20 mm
2) The ratio of the resistance difference between the two conductors of the same pair in the star twisted group and its loop resistance is not greater than
The insulation resistance at 20°C is not less than
The wire core is connected to the lead sleeve 1) Star twisted group wire core
2) Signal wire core 0.90mm
Working capacitance
1) Nominal value| |tt||Single group cable and steel wire armored cable
Multiple group cable
2) Allowable deviation
Near-end crosstalk attenuation is not less than
1) Full frequency band
2) All data for at least one end of more than 50% of the cable lengths in delivery
MQ·km
nF/ km
dB/850m
Indicator
10000||tt| |5000
standard
Weigh
Conversion formula
HEQ3, HEQ33, HEQ41, HEQ42, HEQ43 most
Test method
GB/T3048.4
GB/T3048.5||tt| |Standard
Weighing
Inspection regulations
100%||tt| | 1.100% | Each signal line must be
less one
GB/T5441.2
GB/T5441.6
and this standard 7.2
100%| |tt||100%
Serial number
Project name
Far-end crosstalk defense is not less than
1) Single cable full band
2) Multiple groups of electric seam full frequency band
which allows:
a) Seven groups of cables have 9 data, four groups of electric
cables have 4 data, There are 3 data for the three groups of cables b) 10% of the delivered electrical panel has 2 data in the provisions of item a
Insulation electrical strength
Test voltage 50Hz effective value, || tt||1) Star twisted group, 2min
All wire cores to lead sleeves
Core to core
2) Signal wire pair star twisted group connected to lead sleeves, 2 sec| |tt||Note
1L is the length of the cable under test.
The 2 sampling test values ??must be greater than 2 times the specified index. 6.8 Raw materials
The main raw materials used for manufacturing cables should comply with: JB/T8661999
Table 3 (End)
dB/850m
1) Circle Copper wire - TR type in GB/T3953; 2) Lead - GB/T469;
3) Rounded copper wire
7 test method
GB/T6109.7.
refers to
standard
1000|| tt||2000
Conversion formula
-10lg850
Test method
GB/T5441.6
and 7.2 of this standard | |tt | The overlap rate of paper tape wrapping is checked on the cable insulated core.
7.2 When measuring crosstalk, the line under test should be terminated with a non-inductive resistor of 172±1α. 7.2.1 The near-end crosstalk attenuation in the star twisted group should be measured at both ends (1/2). Record the measured value of the highest transmission frequency and the lowest value of the full frequency band, as well as its frequency. It can also be represented by the measured values ??of the following frequencies: 1) 252kHz cable - 156, 204 and 252kHz; 2) 156kHz cable - 123 and 156kHz; 3) 123kHz cable - 123kHz.
But when the measured value at the highest transmission frequency is 66.0dR/850m and above, other frequencies are not allowed to be measured. 7.2.2 The near-end crosstalk attenuation between star twisted groups is only measured at the A end at the highest transmission frequency (1/2). 7.2.3 The far-end crosstalk defense of the star twisted group is allowed to be measured only at the A end at the highest transmission frequency. Test 1/2 between groups, and test 1/2 and 2/1 within groups. Take the smaller of the two data. When both data are less than 73.8dB/850m, only -~ data is counted. 8 Inspection Rules
8.1 Products can only leave the factory after passing the inspection by the technical inspection department of the manufacturer. Each batch of products leaving the factory should be accompanied by the manufacturer's product quality inspection certificate.
8.2 The electrical properties of the cable are tested according to Table 3, and other properties are tested according to Table 4. Serial number
Project name
Structure and appearance
Lead sleeve: thickness| |tt||Alloy lead composition
Expansion performance
Sealing performance
Outer sheath
Length
9 delivery length
JB /T866±1999
Table 4
Standard provision number
6.1, 6.2, 6.3, 6.4
6.5.2||tt ||6.5.3
9.1 The delivery length of the cable should comply with the following regulations: 1) Multi-group cable - 850= iem or 425±5m. One 860=5. m or 430±5m.
2) Single group cable—
Test method
Visual force, micrometer or caliper
5.2 in JB5268.2—1991
JB5268.2—1991 Medium 5.1
JB5268.2—1991 Medium 5.5
JB5268.2—1991 Medium 5.3
GB/T2952
Meter counter or length mark
Inspection regulations
Intermediate control
Intermediate control, at least once per shift
Intermediate control, at least once per shift
100%| |tt||100%
9.2 Short sections of cables with a length of not less than 200m are allowed to be delivered, and their quantity should not exceed 10% of the total number of deliveries. Cable delivery of any length is permitted upon mutual agreement.
9.3 The length measurement error should not exceed ±1%. 10 Packaging and marking
10.1 Cables should be packaged and delivered on cable drums that comply with JB/T8137 regulations. Only one cable is allowed on each disk. The simplified diameter should be no less than 25 times the outer diameter of the cable, and the cable end should be sealed and fixed on the cable drum. The valve should be welded to one end of the cable. The end protruding outside the cable drum should be nailed with a protective cover.
10.2 The cable should be filled with 0.3~0.8MPa dry air or nitrogen. 10.3 When the near-end crosstalk attenuation values ??of cable ends A, B or A and B are greater than 62.5dB/850m, mark "A Excellent", "B Excellent" or "A, B" respectively on the side panel of the cable tray. Excellent" words. 10.4. A quality certificate hidden in an impermeable bag should be fixed on the inside of the side panel of each cable tray. Each cable drum should be marked with: a) manufacturer name and trademark;
b) cable model, specification and length;
c) cable end "A inside" or "A outside"; d) Gross weight: kg;
e) Manufacturing date: year, month;
f) Arrow indicating the correct rotation direction of the cable drum: g) Standard number: JB/T866—1999. 6|| tt||Art
JB/T8661999
g|| tt||degree by g
880A1230
19XXA XX
halogen
100044
tt||XXX.XX0
|tt||6661~998
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