Underground Secondary Distribution Cable

18/30 (36) KV, 6/10 (12) KV ,185SQ.MM 3 CORE COPPER CONDUCTOR XLPE INSULATED ALUMINIUM WIRE ARMOURED underground cable

1. The cross-linkage PE insulated and wrinkled aluminum wrapper waterproof PVC sheathed power cable.

2. The cross-linkage PE insulated and wrinkled aluminum wrapper waterproof PE sheathed power cable.


Specific property for usage of 110KV~220KV XLPE high-voltage cable
1. Cable's conductor highest working temperature is allowed up to 90º C, and overload when meet an emergency is 130º C, When short circuit (in � 5 seconds) the highest temperature is 250º C
2. When installing or laying cable, the ambient temperature should be less than -20º C, and have to give a preheat to cable.
3. The minimum bending diameter(in follow the table):
Note: In form, D0 is a real test value to cable's outer diameter.
4. Allowed biggest axial traction force to outer diameter when laying cable (not consider the radial lateral-pressure at bent set ion) T=KÃ? Core NO. Ã? Section (kg), in formula, the coefficient K value should be: The copper core get 7, the aluminum core get 4.
5. Allowed biggest lateral-press P, when cable is being bent
The single core cable is required Pâ?¤ 500kg/m.
P=T/R (T is indicated axial traction force; R is indicated radius of bent-wheel), Knowing from above formula, as the traction force is made up by length and weight of cable. So it lets P to applying requirement as above. Then the diameter of bent-wheel should be widened.
http://www.alibaba.com/product-detail/240mm-300mm-400mm-500mm-630mm-800mm_60455062615.html?spm=a271v.8028081.0.0.ziQH7w

POWER CABLE,
Medium voltage cables armoured

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Power cable high voltage steel tape/wire/al wire armoured underground power cable

Construction specification
Standard412500540
Inner cond uctor(mm) 2.262.783.15
Dielectric(mm)9.3011.5013.03
Outer conductor(mm)10.5012.7013.72
Outer sheath(mm) 12.5014.7015.30

Attenuation(20f¦, fªdb/100m)electricial characteristics

Attenuation412500540
F(mhz)max db/100m max db/100m max db/100m
50.660.520.46
502.131.691.44
2004.363.483.04
3005.394.323.71
4006.285.044.33
4506.695.374.59
5007.075.694.89
5507.445.995.12
6508.156.565.65
7508.807.106.07
8509.427.616.51
100010.308.347.12
135013.8610.909.20
175015.7812.4110.69
215017.4813.2611.98

Dc resistance of inner conductor(¬+/km) 40 ccs 8.0 bc
Dc resistance of outer conductor(¬+/km)26 al 13 tc
Impedance(¬+)75f+2.0
Cpacitance(pf/m)52f+3.0
Waveve locity rate% 85%
Retum loss(>db) vhf 5-300mhz 20db
Uhf 300-960 mhz18db


According to the customers

Voltage
600V

Construction
Sino-cables type URD are manufactured with compacted 1350 aluminum or 8000 series aluminum alloy conductor insulated with black XLPE. Two or three insulated conductors and an neutral wire are cabled together.
Single core, duplex, triplex, quadruplex are available.

Standard
ASTM B231, B800, UL854,ICEA S-76-474, or other standards required by customers.