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LOW-VOLTAGE POWER
CABLES
WITH PVS INSULATED COPPER CONDUCTORMany kinds of power cable constructions
are required to transport electrical energy from the power stations to the consumer. The
cable should be economical to use.
An optimum cross-sectional area can be calculated based on the capital costs of the
cable and its installation and the running costs incurred by the power losses in the
cable.
The following factors are important when selecting a suitable cable construction:
- Maximum operating voltage
- Insulation level
- Frequency
- Load to be carried
- Daily load curve
- Magnitude and duration of possible overloads
- Magnitude and duration of short-circuit currents
- Details of neutral points in system (insulated, earthed direct, earthed Petterson coil,
others)
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- Connection between overhead and cable line (direct or via
transformer)
- Insulation level of equipment (bare-conductor insulators, arresters, etc.)
- Voltage drop
- Length of line
- Profile of line
- Mode of installation (underground -direct or in ducts-,in air - tunnel-)
- Chemical and physical properties of soil (rocky, sandy, clay or boggy, moist or dry,
corrosive or not)
- Maximum and minimum ambient air and soil temperatures (other factors liable to heat the
cables)
- Specification and requirements to be met
Low-voltage (0,6/1 kV) 3 1/2 core power cables with PVC
insulated copper conductor has been manufactured by TÜRKKABO A.O. according Turkish
Standard TS-212 (VDE 0271), since 1974 and by the registered name VİNAL ®.
Power cables according to other standards, regulations or specifications will be
manufactured on the request of our customers.
TURKKABLO A.O. manafactures three
diffirent types VINAL cable in 10... 185 mm² cross sectional area.
1-
VİNAL -D ( YVV - NYY )
VİNAL-D, 3 1/2 cores low-voltage power cable,
with PVC insulated copper conductor and PVC sheathed, for indoor and outdoor heavy duty
installations, in ducts or conduits, power stations, industrial areas, underground power
distribution nets in different soil (dry, moist, wet, sand, gray, etc.) conditions where
the mechanical factors to damage insulation has been prevented.
2- VİNAL -K ( YVMV - NYCY )
VİNAL-K, 3 cores low-voltage power cable, with concentric neutral copper conductor
and PVC insulated copper phase conductors and PVC sheathed, for indoor and outdoor heavy
duty installations, in ducts or conduits, power stations, industrial areas, underground
power distribution nets, in different soil (dry, moist, wet, sand, gray, etc.) conditions.
The concentric copper conductor prevent cable against external electrical and mechanical
effects.
3- VİNAL -Z ( YVŞV - NYFGbY )
VİNAL-Z, 3 1/2 cores low-voltage steel armored power cable, with
PVC insulated copper conductors and PVC sheathed, for indoor and outdoor heavy duty
installations, in ducts or conduits, power stations, industrial areas, underground power
distribution nets in different soil (dry, moist, wet, sand, gray, etc.) , river and sea
conditions.
DESIGN of VINAL CABLES
| Conductors |
: |
10 - 16 mm2
round solid copper(re) |
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16 - 25 mm2 round stranded and
compacted, round-shaped copper conductor (rm) |
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35... 185 mm2 stranded and compacted, sector (sm) or round (rm) shaped copper |
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conductor |
| Insulation |
: |
Extruded PVC - color core
identification |
| Laying-up |
: |
Four or three insulated cores laid-up |
| Inner sheath |
: |
Extruded PVC or plastic tape |
| Reduced neutral |
: |
A concentric layer of copper wires and an open
helix of copper conductor tape |
| concentric.conductor |
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| Metallic sheath |
: |
Flat galvanized steel wire |
| Metallic sheath tape |
: |
PVC plastic or metallic tape |
| Outer sheath |
: |
Extruded black PVC |
| Sheath marking |
: |
Name of the manufacturer, type designation,
cross-sectional area of conductors |
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rated voltage and manufacturing standard
embossed on outer sheet. |
| Standards |
: |
VDE 0271 or TS-212 or TS-11178 (IEC 502) or
other standards by request |
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VİNAL® CABLE CONSTRUCTIONAL DATA
VİNAL CABLE |
EQUIVALENT
ALUIMINIUM |
VİNAL - D |
VİNAL - K |
VİNAL - Z |
Numberxphase conductor/neutral
Cross Section
mm² |
Numberxphase conductor/neutral
Cross Section
mm² |
Outer diameter
mm |
Unit weight
kg/km |
Standard lenght on reel
m |
Outer diameter
mm |
Unit weight kg/km |
Standard lenght on reel
m |
Outer diameter
mm |
Unit weight
kg/km |
Standard lenght on reel
m |
3x10re
/10re |
3x16 /16 |
20 |
740 |
1,000 |
21 |
730 |
1,000 |
23 |
1,150 |
1,000 |
3x16re(rm)/16re(rm) |
3x25 /16 |
23 |
980 |
1,000 |
23 |
1,040 |
1,000 |
25 |
1,430 |
1,000 |
3x25rm/16re(rm) |
3x35 /16 |
27 |
1,440 |
1,000 |
28 |
1,500 |
1,000 |
29 |
1,990 |
1,000 |
3x35sm(rm)/16re(rm) |
3x50 /25 |
25 |
1,520 |
1,000 |
27 |
1,60 |
1,000 |
28 |
2,050 |
1,000 |
3x50sm(rm)/25rm
|
3x70 /35 |
30 |
2,150 |
1,000 |
31 |
2,220 |
1,000 |
32 |
2,770 |
1,000 |
3x70sm(rm)/35sm(rm) |
3x95 /50 |
33 |
2,900 |
1,000 |
34 |
2,990 |
1,000 |
36 |
3,610 |
1,000 |
3x70sm(rm)/35sm(rm)
|
3x120 /70 |
33 |
2,900 |
500 |
34 |
2,990 |
500 |
36 |
3,610 |
500 |
3x95sm(rm)/50sm(rm) |
3x150 /70 |
38 |
3,900 |
500 |
39 |
4,000 |
500 |
40 |
4,740 |
500 |
3x120sm(rm)/70sm(rm) |
3x185 /70 |
41 |
5,000 |
50 |
42 |
4,990 |
500 |
41 |
5,970 |
500 |
3x150sm(rm)/70sm(rm) |
3x240 /70 |
45 |
5,900 |
500 |
46 |
6,020 |
500 |
48 |
7,120 |
500 |
3x185sm(rm)/95sm(rm) |
2x3x95/50 |
49 |
7,300 |
500 |
51 |
7,420 |
500 |
52 |
8,590 |
500 |
VİNAL® CABLE ELECTICAL PROPERTIES
VİNAL CABLE |
Unit |
Copper phase conductors |
Cross section |
mm² |
10 |
16 |
25 |
35 |
50 |
70 |
95 |
120 |
150 |
185 |
Max.DC-resistance
at +20°C |
ohm/km |
1,83 |
1,16 |
0,727 |
0,524 |
0,387 |
0,268 |
0,193 |
0,153 |
0,124 |
0,0991 |
Contininuos
current-carrying (*),
in ground |
A |
75 |
98 |
128 |
157 |
185 |
228 |
275 |
313 |
353 |
399 |
Max. pemissible
short-circuit currents
1 s. |
kA |
1,1 |
1,8 |
2,8 |
4,0 |
5,8 |
8,0 |
10,9 |
13,8 |
17,2 |
21,3 |
- Ambient ground temperature +20°C
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- Maximum permissible temperature of conductor
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- Thermal resistivity of soll 1,0 K m/W
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in continuous
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- Maximum permissible temperature of conductor
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- Depth of laying, in ground 70 cm.
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in short- circuit up to s+160°C
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INSTALLATION
and JOINTING SYSTEM
Minimum permissible bending radii
during laying
Particular attention must be paid to the bending radii during laying of power cables.
The radii should be not smaller 15 times of the outer diameter of the cable, in general.
Maximum permissible tensile forces during laying
During laying of the power cables particular attention must be paid to the permissible
tensile forces.
- Maximum permissible tensile forces when pulling by cable stocking:
F = A1 x 10...15 N/mm2 (cable with aluminium conductor)
F = A1 x 10...20 N/mm2 (cable with copper conductor)
but maximum value is 8500 N
- Maximum permissible tensile forces when pulling by eye attached to the conductors:
F = A1 x 15 N/mm2 (cable with aluminium conductor)
F = A1 x 50 N/mm2 (cable with copper conductor)
but maximum value is 20 000 N
- Maximum permissible tensile forces when pulling by is attached to the armour wires:
F = A2 x 100 N/mm2
A1 = total cross-sectional area of conductors in mm2
A2 = total cross-sectional area of armour wires in mm2
Minimum permissible cable temperatures during laying
While laying power cables, the temperature of cables should not be below 0 ºC
.
At lower temperature the cables must be adequately warmed up beforehand. This can be
done by storing in a heated area for several days or by means of special hot air
equipment.
Jointing
We prefer to use heat shrinkable sleeves with a hot-melt adhesive for to ensure a perfect
sealing of cable splices, connections and through-out joints.
For the performance of the cable, particular attention must be paid when supplying
accessories and fittings for the splicing and termination of power cable. The
installation of the splice must be according to the supplier instructions.
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