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Medium Voltage Aluminum Conductor XLPE Insulated Steel Tape Armored PE Sheathed Power Cable

Medium Voltage Aluminum Conductor XLPE Insulated Steel Tape Armored PE Sheathed 3 Core Power Cable

Rated voltage: 3.6/6(7.2)kV, 6/6(7.2)kV, 6/10(12)kV, 8.7/10(12)kV

No. of Cores: 3 core

The ambient temperature for installation: ≥0℃

Max. conductor temperature in normal operation: ≤90℃

Max. operating temperature of conductor when cable short-circuited (5s maximum duration): 250℃

Content:
Medium Voltage Aluminum Conductor XLPE Insulated Steel Tape Armored PE Sheathed 3 Core Power Cable
 
Construction

Conductor: Stranded aluminium conductor to IEC60228 class 2

Conductor Screen: Extruded semi-conductive compound

Insulation: XLPE (cross-linked polyethylene) rated at 90°C

Insulation Screen: Extruded semi-conductive compound

Metallic Screen: copper tape or a concentric layer of copper wires

Color for core identification: Red, Yellow, Blue tape shall be applied between insulation screen and metallic screen (The above identifying can be changed as user requirement)

Assembly: Three screened cores are laid up together, if necessary filled with non-hygroscopic material compatible with insulation and covered with a layer of PE sheath

Inner Sheath: Extruded layer of PE

Armour: Double of galvanized steel tape

Outer Sheath: PE

 

Standards:
  • IEC60502,IEC 60228,IEC60332, BS 5467, BS 6622, IS 1554, IS 7098 and ICEA S-66-524 etc.
  • Hongda Cable can also design and produce for special application requirement.
Technical data :
1.D.C. Resistance and Short-circuit Current of Aluminum Conductor (reference value)

Nominal Section Area of Aluminum Conductor

(mm2)

Max. Permissible D.C. Resistance of Conductor at 20℃ (Ω/km)

Maximum Permissible Short-circuit Current for Conductor (1s) (kA)

1.5

-

0.13
2.5 12.1 0.22
4 7.41 0.34
6 4.61 0.51
10 3.08 0.99
16 1.91 1.56
25 1.20 2.42
35 0.868 3.37
50 0.641 4.79
70 0.443 6.68
95 0.320 9.03
120 0.253 11.4
150 0.206 14.2
185 0.164 17.5
240 0.125 22.6
300 0.100 28.2
400 0.0778 37.65
500 0.0605 47.0
630 0.0469 58.0

2.Capacitance and Inductance of Cable (reference value)

(1)Capacitance

Nominal Section Area of Aluminum Conductor (mm2) Rated Voltage (kV)
3.6/6 6/6 6/10 8.7/10 8.7/15 12/20 18/30 21/35 26/35
Capacitance for Each Phase (μF/km)
25 0.2423 0.1922 0.1576

-

-

-

-

35 0.2684 0.2116 0.1725 0.1502

-

-

-

50 0.3022 0.2367 0.1917 0.1661 0.1363 0.1239 0.1150
70 0.3462 0.2693 0.2167 0.1868 0.1508 0.1365 0.1263
95 0.3875 0.2999 0.2400 0.2060 0.1643 0.1483 0.1368
120 0.4236 0.3266 0.2603 0.2228 0.1760 0.1584 0.1460
150 0.4647 0.3570 0.2834 0.2418 0.1893 0.1700 0.1563
185 0.5059 0.3873 0.3123 0.2656 0.2060 0.1815 0.1665
240 0.5430 0.4290 0.3439 0.2916 0.2207 0.1972 0.1805
300 0.5589 0.4706 0.3755 0.3175 0.2387 0.2128 0.1945
400 0.5940 0.5311 0.4213 0.3551 0.2648 0.2354 0.2146
500 0.6167 0.5839 0.4613 0.3880 0.2876 0.2551 0.2321
630 0.6848 0.6481 0.5099 0.4278 0.3151 0.2789 0.2333

(2) Inductance for single core cable (S=2D)

Nominal Section Area of Aluminum Conductor (mm2) Rated Voltage (kV)
3.6/6 6/6 6/10 8.7/10 8.7/15 12/20 18/30 21/35 26/35
Inductance (MH/km)
25 0.5954 0.6143 0.6474

-

-

-

-

35 0.5753 0.5932 0.6248 0.6390

-

-

-

50 0.5543 0.5711 0.6011 0.6145 0.6501 0.6675 0.6751
70 0.5357 0.5486 0.5765 0.5919 0.6252 0.6394 0.6467
95 0.5172 0.5318 0.5608 0.5726 0.6043 0.6180 0.6279
120 0.5059 0.5197 0.5473 0.5586 0.5891 0.6051 0.6118
150 0.4949 0.5079 0.5341 0.5449 0.5740 0.5895 0.5959
185 0.4885 0.5006 0.5252 0.5354 0.5640 0.5760 0.5839
240 0.4790 0.4890 0.5143 0.5216 0.5487 0.5615 0.5677
300 0.4749 0.4818 0.5032 0.5102 0.5376 0.5484 0.5540
400 0.4660 0.4702 0.4927 0.4991 0.5219 0.5343 0.5395
500 0.4600 0.4619 0.4848 0.4907 0.5128 0.5224 0.5272
630 0.4547 0.4563 0.4748 0.4827 0.5012 0.5101 0.5161

Note: S-The distance between the two adjacent cable center, D-The overall diameter of the cables.

3. The Laying of the Cable Ampacity Correction in Different Environments

(1) Rating factors of current rating for ambient temperature:

Ambient Temperature 20℃ 25℃ 30℃ 35℃ 40℃ 45℃ 50℃
Rating Factors 1.18 1.14 1.10 1.05 1.0 0.95 0.89

(2) Directly buried into ground

a) When the single core cables are installed separately, the distance between the cables is 2 times of the cable’s diameter.

b) Ambient temperature: 25℃

c) Soil thermal resistivity: 1.0℃.m/W

d) Depth: 0.7m

e) Rating factors under different ambient temperature

Ambient Temperature 15℃ 20℃ 25℃ 30℃ 35℃ 40℃ 45℃
Rating Factors 1.07 1.04 1.00 0.96 0.92 0.87 0.83

f) The correct coefficients of ground thermal resistivity

Thermal Resistive ℃.m/W 0.6 0.8 1.0 1.2 1.4 1.6 2.0
Rating Factors 1.17 1.08 1.00 0.94 0.89 0.84 0.77

Current Rating Conditions:

Ground Temperature: 25°C

Ambient Temperature (air): 30°C

Depth of Soil: 0.8 m

Thermal Resistance of Soil: 1.0℃.m/W
Installation :
     
Application :

XLPE insulated cable functions well for electricity transmission and distribution lines for its excellent electrical and physical properties, including the advantage of simplicity in construction, lightness in weight; convenience in application besides its excellent electrical, thermal, mechanical and anti-chemical corrosion properties. Laying indoors, in tunnel, fixed on the bracket, pipe and buried in the soil, the cable cannot bear external mechanical forces.

 
Packing and shipping :
 
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