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Electric cable for rated voltage 0.6/1KV
Type |
Name |
Allplication |
VV |
Copper conductor, PVC insulated, PVC sheathed electrical cable |
For laying indoors, in tunnel or cable trench, unable to bear external mechanical forces. Single core cable in magnetic duct is not permissible.
|
VLV |
Aluminium conductor, PVC insulated, PVC sheathed electrical cable |
|
VY |
Copper conductor, PVC insulated, PE sheathed electrical cable |
|
VLY |
Aluminium conductor, PVC insulated, PE sheathed electrical cable |
|
VV22 |
Copper conductor, PVC insulated, steel tape armoured, PVC sheathed electrical cable |
For laying indoors, in tunnel or cable trench, able to bear external mechanical forces, but unable to bear large pulling force.
|
VLV22 |
Aluminium conductor, PVC insulated, steel tape armoured, PVC sheathed electrical cable |
|
VV23 |
Copper conductor, PVC insulated, steel tape armoured, PE sheathed electrical cable |
|
VLV23 |
Aluminium conductor, PVC insulated, steel tape armoured, PE sheathed electrical cable |
|
VV32 |
Copper conductor, PVC insulated, steel wire armoured, PVC sheathed electrical cable |
For laying indoors, in tunnel, cable trench, well and direct buried. Able to bear external mechanical forces and determinate pulling force. |
VLV32 |
Aluminium conductor, PVC insulated, steel wire armoured, PVC sheathed electrical cable |
|
VV33 |
Copper conductor, PVC insulated, steel wire armoured, PVC sheathed electrical cable |
|
VLV33 |
Aluminium conductor, PVC insulated, steel wire armoured, PVC sheathed electrical cable |
Installation and operation of cable
l In air
1. The centre distance between of single cores laid in paralled
Cross section mm2 |
Centre distance |
Less than or equal to 185mm2 |
Twice of the cable diameter |
Above 185mm2 |
90mm |
2. Ambient air temperature: 40°C
3. Maximum operating temperature of conductor: 70°C
4. Current carrying rating factor for different ambient air temperature
Ambient air temperature(°C) |
20 |
20 |
30 |
35 |
40 |
45 |
Rating factor |
1.29 |
1.22 |
1.15 |
1.08 |
1.0 |
0.91 |
l Direct in ground
1. The single cables are installed separately. The centre distance between cables is twice of he cable diameter.
2. Soil temperature: 25°C
5. Maximum operating temperature of conductor: 70°C
3. Thermal resistivity of soil: 1.0°C. m/W
4. Depth of direct buried: 0.7m
5. Current carrying rating factor for different soil temperature
Soil temperature(°C) |
20 |
20 |
30 |
35 |
40 |
Rating factor |
1.04 |
1 |
0.96 |
0.92 |
0.87 |
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