computer shielding cable (cable for dsc system) -尊龙登录



computer shielding cable (cable for dsc system)

http://www.ahdqjt.com     time: 11/04/10 10:32

it is used as connection cable of inspection devices and instruments with high demand on interference resistant performance in computer network and control system.
executive standard:
q/tk.j.04.030-2004 or bs5308 standard for reference
performance for usage:
1. ac rated voltage u0/u: 300/500v. long term working temperature of cable conductor is 70℃ & 105℃ for cable with pvc insulation, 70℃ for cable with pe insulation and 90℃ for cable with xlpe insulation.(xlpe insulation includes silane xlpe & irradiation xlpe insulation.)
2. min. environment temperature is -40℃ for fixed laying and -15℃ for non-fixed laying. environment temperature shall be no less than 0℃ for installing.
3. min. bending radius allowed by cable is no less than 6 times that of cable od for non-armored soft cable or braided shielding cable and 12 times that of cable od for cable with metallic tape wrapped shielding or steel wire/steel tape armor.
type, description and definition
example: djyp3vp3-32
32: steel wire winding armor pvc outer sheath
p3: aluminum-plastic compound tape wrapped general shielding 
v: pvc inner sheath
p3: aluminum-plastic compound tape wrapped individual shielding
y: pe insulation
dj: series number of computer cable
main technical parameter

  1. dc resistance of conductor at 20℃

nominal cross section area (mm2)

pieces of conductor/diameter of single piece

dc resistance of conductor at 20℃

a

b

c

a, b

r

0.5

1/0.80

7/0.30

16/0.20

≤36.0

≤39.0

0.75

1/0.97

7/0.37

24/0.20

≤24.5

≤26.0

1.0

1/1.13

7/0.43

32/0.20

≤18.1

≤19.5

1.5

1/1.38

7/0.52

30/0.25

≤12.1

≤13.3

2.5

1/1.78

7/0.68

49/0.25

≤7.41

≤7.98

2. insulation resistance at 20℃


performance item

pvc insulation

pe, xlpe insulation

insulation resistance at 20℃

≥25

≥500

3. cable shall endure a.c. voltage test of 2000v under power frequency for 1min without puncture of insulation. and testing temperature is environment temperature.


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