Control cable differentiation

Copper core PVC insulated shielded PVC sheathed flexible wires RVVP300/300V Insulation thickness: The average value of insulation thickness shall not be less than the value specified in the product standard. However, the thickness at any point may be less than the specified value of 90%-0.1 mm. The average thickness of the jacket is not less than the value specified in the product standard, however, the thickness at any point may be less than the specified value as long as it is not less than 85%-0.1 mm of the specified value. BVR type 450/750V copper core PVC insulated flexible cable conductor nominal cross section mm stranded conductor single wire minimum number of insulation thickness specified value mm average outer diameter upper limit mm20°C maximum conductor resistance Ω/km70°C minimum insulation resistance Value MΩ · km copper core tinned copper core 2.5190.84.17.417.560.0114190.84.84.614.700.0096190.85.33.083.110.008410491.06.81.831.840.007216491.08.11.151.160.006225981.210.20.7270.7340.0058351331.211.70.5240.5290.0052501331.413.90.3870. 3910.0051701891.416.00.2680.2700.0045

PVC soft cable use conditions: 1, cable conductor long-term allowable maximum operating temperature of 70 °C; 2, the minimum ambient temperature when the cable is laid is 0 °C; 3, the cable allows bending radius: non-armored cable is not less than the cable diameter 8 times; armored cable is not less than 20 times the cable diameter; 4, when the short circuit (maximum duration does not exceed 5S), the maximum working temperature of the cable conductor is 160 °C;

Nominal section mm2

1.5

2.5

4

6

10

16

25

35

50

Conductor Maximum DC Resistance Ω/km at 20°C

13.3

7.98

4.91

3.3

1.91

1.21

0.78

0.554

0.389

Nominal section mm2

70

95

120

150

185

240

300

400

Conductor Maximum DC Resistance Ω/km at 20°C

0.272

0.206

0.161

0.129

0.106

0.0801

0.0641

0.0495

2. Minimum insulation resistance at 70°C:

Nominal section mm2

Minimum insulation resistance MΩ.km at 70°C

1.5

0.01

2.5

0.009

4

0.007

6

0.006

10

0.0056

16

0.0046

25

0.0044

35

0.0038

50

0.0037

70

0.0032

95

0.0032

120

0.0029

150

0.0029

185

0.0029

240

0.0028

300

0.0028

400

0.0026

3, industrial frequency AC withstand voltage test finished cable should withstand the following table specified AC 50Hz withstand voltage test should not breakdown:

Number of cable cores

experiment method

Sample length m

Voltage V

duration

Manufacturing length

Rated voltage

Test voltage

5min

Single core

Soaking 1h

450/750

2500

Multi-core and armored

Interphase

600/1000

3500



Main technical parameters of RVV flexible cable: The maximum DC resistance of the conductor at 1,20°C should meet the following requirements:

Approximate outer diameter and current-carrying capacity of PVC soft cable: compared with ordinary PVC insulated PVC sheathed power cable of the same specification, the outer diameter of the cable is generally increased: the conductor cross section is 95mm2 or less, and the outer diameter increases by 2~ 10mm; conductor cross section is 120mm2 and above, outside diameter increases 12~20mm; cable weight generally increases 4%~10%. The allowable ampacity of soft power cables can be reduced by 6% to 10% with reference to the current carrying capacity of VV series power cables of the same specification.

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