Application and description:

Three core cable design distribution range is 3.8/6.6KV to 19/33KV, frequency is 50Hz. Mainly used in the power supply station, indoor and outdoor pipelines, underground water and other places, as well as the industry, power station, power station cable installation.

 

Standard:

IEC 60502 Part (1.8/3KV) IEC 60502 Part 2 (3.6/6KV to 18/30KV)

 

Construction:

Conductor:

Plain annealed copper or aluminum conductor, accord with IEC 60228 (1 class and 2 class).

 

Conductor shield:

The conductor shield shall be non metallic, and shall include extruded semiconductive compound, that is applied to the top of the semiconductor compound. The conductor shielding layer is applied to the three extrusion process of the conductor and the insulation shield. The conductor shielding layer is made of non-metallic layer, and the extruded semiconductive compound must be firmly adhered to the insulation to exclude any gaps. Conductor shield for 1.8/3KV to 3.6/6KV PVC, EPR/HEPR insulated cables are not required.

 

Insulation:

1.8/3KV and 3.6/6KV cable range generally use PVC insulation, can also use XLPE, EPR/HEPR insulation.

 

Insulation shielding:

The utility model relates to extruded semi conducting crosslinked composite layer. The semiconductor extrusion layer shall include bonded, or stripped semiconductor composite layer, welding or terminating ability. As an option, the 1.5 conductive tape can be applied to the extrusion of semi conductive metal layer. The minimum thickness is 0.3 mm, the maximum resistivity is 500 ohm, at 90℃  shield is tightly mounted on the insulation to exclude all air voids and can easily be removed by hand in the field. Insulation shield for 1.8/3KV to 3.6/6KV PVC, EPR/HEPR insulated cable is not required. The shielding layer can be coated on the periphery of the waterproof layer of the semiconductor so as to realize longitudinal waterproof.

 

Inner covering and packing:

For composite metal layer cable or cable with metal layer for each single core, the inner semiconductor and the filler shall be coated on the periphery of the core. The inner layer is generally made of waterproof material, unless the cable is subjected to longitudinal waterproofing. The inner cover is generally extruded layer, but can overlap, if the void between the core and the core is filled.

 

Metal layer:

The metal layer can be applied to single core and can also be applied to the multi core periphery. 

1) metal shield

2) concentric conductor

3) metal sheath

4) metal armor

The metal shielding layer includes copper tape or concentric copper wire or copper wire and tape combination. The metal layer provides ground fault current path that the concentric conductor can

covered by insulation, covered with insulation or covered with inner sheath. A tight seamless tube of lead or lead alloy. Metal armor can be flat

 filiform armour, round armor and double tape armored.

 

The separation sheath (armored cable):

The separated sheath comprises extrusion layer, and the extrusion layer material is PVC, PE or LSZH, and the thickness of the extruded layer is generally 0.02Du 0.6mm, and the Du is protective layer  diameter calculated by technical parameters. Generally, the thickness of the separate sheath is more than 1.2mm. The separation sheath is generally applied to the outer layer of the lead sheath, 

the thickness of the separation sheath is less than 1.0mm.

Wrapping layer (lead sheath cable):

Wrapped cushion is composed by the impregnated / synthetic material, can also be composite of two layers, the band composed of special composite composition. Thickness in general is 

about 1.5mm.

 

The armored layer (for armored cable):

General for round steel wire armored, apply in separate outer sheath. For the flat wire armoured and more than 15mm diameter ordinary virtual armored cable, common 

flat armour thickness is 0.8mm, the diameter of the virtual cable armoring layer is 15mm, including 15mm. Tape armoured shows two layer spiral, outer layer generally make inner layer as axis, also tape armoured cables and wires need to add reinforcing layer pad.

 

Outer sheath:

The outer sheath comprises an extruded layer and extruded thermoplastic composite (PVC ST3 or PE ST7), or elastic composite (poly butylene chloride or CSP)

. The thickness of the outer sheath is 0.035 D, and the diameter of the outer sheath is D. Non armoured cable and non armored cable sheath total, metal shielding layer

 or concentric conductor, the outer sheath thickness should be less than 1.4mm, the total thickness of the outer sheath sheath of concentric conductor metal sheathed cable should be greater than 1.8mm.

 

Metal shielding minimum cross-sectional area:

Nominal cross-sectional area	Minimum cross-sectional area	The dc resistance of copper wire shielding
mm²	mm²	mm
≤120	16	1.06
150-300	25	0.72
400-630	35	0.51
800-1000	50	0.35

 

Conventional/operation/test:

Nominal voltage Uo/U	Working voltage  (Um)	Testing voltage (rms)
1.8/3KV	3.6KV	6.5KV
3.6/6KV	7.2KV	12.5KV
6/10KV	12KV	21KV
8.7/15KV	17.5KV	30.5KV
12/20KV	24KV	42KV
18/30KV	36KV	63KV
21/35KV	42KV	73.5(53)*KV
26/35KV	42KV	91(65)*KV

 

For more information about three core cable technical parameter, please contact us by E-mail [email protected] and our salemen will reply you in 24 hours. Thank you.