Rated voltage 8.7kV/15kV XLPE insulated steel tape（steel wire）armored PE (PVC) sheathed power cable product introduction

1 Conductor standard

GB/T 12706 Copper or aluminium conductor extruded plastic insulated power cables with rated voltages up to 35 Kv

IEC 502

GB/T 19666

IEC 60331

2 Conductor characteristics

2.1 Rated power-frequency voltage U0/U: 3.6/6kv～8.7/15kV.

2.2 Max admissible operating temperature of the conductor: 90℃.Max. Short-circuit temperature of conductor shall not be exceed 250C(5s maximum duration).

2.3 The ambient temperature under installation should not below 0 Deg C.

3 Cable type and description

3.1 code

3.1.1 conductor

copper conductor ………………………………………………………………………...T

aluminum conductor ……………..…………………………..……..……..……..…...L

3.1.2 insulation

PVC insulation …………………………………..……………..……..……..……..………V

XLPE insulation………………………………………………..……..……..……..……..…YJ

EPR insulation………………………………………..……..……..……..……..……..……E

3.1.3 sheath

PVC sheath ………………………………………………..……..……..……..……..………V

PE sheath ………………………………………………..……..……..……..……..……..….Y

metallic foil composite  sheath …………………………..……..……..……..…..A

3.1.4 armored

double tape armored ……………………………………………..……..……..……..…2

fine steel wire armoured  ………………………………………..……..……..……..3

thick steel wire armored ……………………………………………..……..……..……4

(double)non-magnetic  metallic belt armoured ………..……..……..…….6

non-magnetic metallic wire armoured ……………..……..……..……..……….7

3.1.5 outer sheath

PVC outer sheath……………………………………..……..……..……..……..……..….2

PE outer sheath ………………………………………..……..……..……..……..………..3

elastomer outer sheath …………………………………..……..……..……..……..…4

3.1.6 Features

Flame  retardant class A…………………………………..………………………………ZA

Flame  retardant class B………………………………..……..……..……..……..……….ZB

Flame  retardant class C………………………………..……..……..……………………..ZC

Halogen free………………………………………..………..……..……..……..……..………...W

Low smoke………………………………………….………..……..……..……..……..……..…..D

Refractory………………………………………………………..…………………………………...N

3.2 Type

3.3 Product Description

Description of product model (characteristic code, insulation, conductor, shield, Inner protective layer, armor layer, outer sheath, rated voltage), specifications (core, the nominal cross-section) and standard code.

For example：

(1) YJLV22-8.7/15KV-3*240

Aluminum conductor, XLPE insulated copper tape  screened, steel tape armoured PVC sheathed power cable, rated voltage is  8.7/15KV, three core nominal cross 240mm2

(2) FY-ZC-YJV32-8.7/15KV-3*300

Copper core XLPE insulated copper tape  shielding, steel wire armoured and PVC sheathed termite resistant and flame  retardant class C power cable, the rated voltage for 8.7/15KV, three core  ,nominal cross-section 300mm2

4 Product Structure

4.1 Product Structure Diagrams

Specification Model：YJV22-8.7/15kV-3*300mm2

Specification Model：YJLV32-8.7/15kV-3*240mm2

Specification Model：YJV22-8.7/15kV-3*240mm2

Specification Model：：YJV22-8.7/15kV-3*150mm2

4.2 Product Structure

4.2.1 Cable Conductor

The  conductor using twisted round tight wire core, pressure coefficient is not less than 0.9.

4.2.2 Conductor Screen

Conductor  screen using the semi conductive shield cross linking materials

squeeze out and wrap, semi conductive layer evenly coated on the  conductor, smooth surface, no obvious strand wale, no sharp corners, particles, burned, or scratch marks, in the stripped conductor shielding and semi  conducting layer is not stuck left between the conductors stranded.

4.2.3 Insulation

Insulating  materials is made of the United    States imported Dow Chemical Cross linked  polyethylene material water treeing resistance

4.2.4 Insulation Shield

Insulated shield  by cross linking of the U. S. Dow semi conductive non peeling type the outer  shielding material is extruded, and semi conductive layer evenly coated on the  insulation surface, smooth surface, no sharp corners, particles, burned, or  scratch marks

4.2.5 Metal Shield

The metal shielding composed of soft copper strip overlapping , the copper strip joint by arc spot  welding, and meet the  requirements of short circuit temperature; lap cover rate of not less than 20%,  does not allow negative tolerance.  Copper tape wrapping should be  continuous, uniform and smooth, not too tight, in the Allowable bending range  not fracture and wrinkling.

4.2.6 Phase Color Logo

A longitudinal  (yellow, green and red) phase color mark belt along the cable body is arranged  between the insulating shield and the metal shield. Its width is not less than 2mm.

4.2.7 Cable Filling

The cable core  is filled with non moisture absorbing and non air tight net rope, wrap around  with non-woven fabric, The inner liner and the  filler are adapted to the operating temperature of the cable, and do not have a detrimental effect on the insulating material.

4.2.8  Inner Lining

The inner liner  layer uses the packed black linear low density polyethylene (LLDPE) sheath  material. The lining must be complete, smooth, no scratches, perforation and  other defects. The minimum thickness of any point is not less than 85% of the  nominal value.

4.2.9 Steel Tape Armored

Steel tape  armored double galvanized steel tape, wrap around with glossy and smooth. The steel belt has a close, smooth surface, and  has a uniform pitch, no curling, no leakage and no defects.

4.2.10 Outer Sheath

The outer sheath  of the cable is extruded with the material of black high density polyethylene  sheath. Cable outer sheath closely, the surface of a round, smooth, the cross  section of the no visible voids, inclusion, bubble, not good plasticization and  coking and other undesirable phenomena.