power flexible cable for telecommunication power supply application -尊龙登录



power flexible cable for telecommunication power supply application

http://www.ahdqjt.com     time: 11/20/10 08:34

 

it is used to transmit and distribute power of a.c rated voltage 0.6/1 kv or lower for power system. it has not only better performance of pvc insulation power cable, but also advantages of softness and flexibility as well

executive standard: yd/t1173-2001

type and description:


type

description

rv

soft power cable with cu core, pvc insulation

rvz

soft power cable with cu core, pvc insulation, flame resistant

rvv

soft power cable with cu core, pvc insulation and sheath

rvvz

soft power cable with cu core, pvc insulation & sheath, flame resistant

rvv22

soft power cable with cu core, pvc insulation & sheath, steel tape armor

rvvz22

soft power cable with cu core, pvc insulation & sheath, steel tape armor, flame resistant.

production condition

  1. max. temperature of cable conductor for long-term working is 70℃
  2. min. environment temperature for installing cable is 0℃
  3. bending radium allowed by cable:

it will be no less than 8 times that of cable o.d for inarmored cable and 20 times that of cable o.d for armored cable

  1. max. working temperature of cable conductor is 160℃ during short circuit (the longest lasting time shall be no more than 5 seconds). 

main technical parameter

  1. max. dc resistance value of conductor at 20℃ shall meet the requirements of the following table:

nominal cross section area

1.5

2.5

4

6

10

16

25

35

50

max. dc resistance of conductor at 20℃

13.3

7.98

4.91

3.30

1.91

1.21

0.780

0.554

0.389

nominal cross section area

70

95

120

150

185

240

300

400

 

max. dc resistance of conductor at 20℃

0.272

0.206

0.161

0.129

0.106

0.0801

0.0641

0.0495

 
  1. min. insulation resistance at 70℃

 

 

nominal cross section area (mm2)

min. insulation resistance at 70℃

nominal cross section area

min. insulation resistance at 70℃

1.5

0.01.

70

0.0032

2.5

0.009

95

0.0032

4

0.007

120

0.0029

6

0.006

150

0.0029

10

0.0056

185

0.0029

16

0.0046

240

0.0028

25

0.0044

300

0.0028

35

0.0036

400

0.0026

50

0.0037

/

/

testing condition:

  1. testing length: 5m
  2. time for immersion in the water is one hour
  3. temperature of water is 70℃
  1. a.c. voltage test under power frequency

the finished cable shall bear a.c. voltage test of 50hz listed in the following table without puncture


core no.

testing method

sample length

voltage

lasting time

rated voltage

testing voltage

5min

single core

immersing in the water for 1th

manufacturing length

450/750

2500

multi-core and armoring

interphase

600/1000

3500

 


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