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6-35 kV XLPE Insulated Power Cables

Group: XLPE insulated power cables

 

ТУ 16.К71-335-2004  ТУ 16.К71-359-2005

ТУ 3530-033-05742781-2010

ТУ 3533-396-00217053-2009

ТУ 16.К71-374-2006

1. Application


The cables are intended for transmission and distribution of electric energy in stationary installations for the alternating voltage 10, 20 and 35 kV, frequency 50 Hz for the circuits with insulated and grounded neutral conductor.
Embodiment of the conductors and performance attributes meet the requirements of IEC 60502-2 and HD 620 S2.
Cables are manufactured singles-core or three-core. Armored cables  are manufactured only single-core cables.

Application of XLPE insulated Power

Type of  cable

 
Cable description

Application

 

Class of fire threat

Copper core

Aluminium core

ПвП АПвП

Polyethylene sheathed XLPE insulated Power Cables

The cables are intended for burying in trenches and must be defended from mechanical failures

О2.7.2.3 О2.7.1.3
ПвПу АПвПу

Polyethylene sheathed XLPE insulated Power Cables The sheath is strengthened


The cables are intended for burying in irregular shape trenches and must be defended from mechanical failures


О2.7.2.3 О2.7.1.3
ПвВ АПвВ

PVC sheathed XLPE insulated Power Cables

The cables are intended for single laying in cable and industrial structures

 

О1.7.2.3

ПвВнг-LS** АПвВнг-LS**

Low fire risk PVC sheathed XLPE insulated Power Сables

The cables are intended for group laying in cable and industrial structures

П1.7.2.2

(for low-smoke cables)

2.7.2.2

(for low-smoke cables)

ПвБП АПвБП

Three-core cable or aluminum conductors, XLPE, armored, in a shell of polyethylene


For laying in soils, except for the heaving and subsiding soil

О2.7.2.3 О2.7.1.3
ПвБВ  АПвБВ 

Three-core cable or aluminum conductors, XLPE, armored, in a shell of flexible PVC

For laying in soils, except for the heaving and subsiding soil, and for laying single cable lines in the cable structures 
 

О1.7.2.3
ПвБВнг-LS** АПвБВнг-LS**

Low fire risk PVC sheathed XLPE insulated Power Сables

The cables are intended for group laying in cable and structures in the absence of tensile stress during operation

П1.7.2.2

(for low-smoke cables)
 

П2.7.2.2

(for low-smoke cables)

** - Low-Smoke

2. Construction
Current-conducting core: copper or aluminium, multiwire, compacted.
Conductor one-core cable is rated section 50-800mm2.
The screen on the current-conducting core is made of an electrically conductive cross-linked polyethylene polymer composition.
Insulation made of peroxide sewed polyethylene.
Electric-conducting screen: electrically conducting cross-linked polymer compositions of polyethylene.

3. Service and operating instructions
All types of the Polyethylene sheathed XLPE insulated Power Cables are intended for burying in different corrosive type of soil.
Under the extra fire-prevention arrangements the Polyethylene sheathed XLPE insulated Power Cables can be laid in open air, for instance in cable structures.


Laying single-core cable in a steel pipe is not allowed.

All types of the PVC sheathed XLPE insulated Power Cables are intended for burying. Defended from mechanical failures , PVC sheathed XLPE insulated Power Cables can be laid in an innavigable tanks.


XLPE insulated Power Cables with strengthened sheath are destined to be used in irregular shape section of cable line containing more than 4 turnings at an angle of more than 30°C. XLPE insulated Power Cables with strengthened sheath can also be used in cable line containing 20 m long rectilineal section with more than 4 tube changes or 40 m long rectilineal section with more than 2 tube changes.


PVC sheathed XLPE insulated Power Cables and low fire risk PVC sheathed XLPE insulated Power Cables can be buried in dry soil.


Low fire risk PVC sheathed XLPE insulated Power Cables can be laid in highly explosive zone.


The cables are intended for laying in unlimited level cabling lines.


Temperature for cables laying without preheating:
— for Polyethylene sheathed XLPE insulated Power Cables — not less than -20°C;
— for PVC sheathed XLPE insulated Power Cables and Low fire risk PVC sheathed XLPE insulated Power Cables — not less than -15°C.

Continuous operating temperature of cable core heating should not exceed 90°С.

At short-circuit duration for not more than 4 sec.:
— maximum allowable temperature of cable core - 250°С;
— maximum allowable temperature of copper screen - 350°С;
— maximum allowable temperature of cable core by the terms of cable non-inflammability - 400°С.

Allowable temperature of cable core under the overload conditions is not more than 130°С.
Period of cable service under the overload conditions must not exceed 8 hours a day and 1000 hours during the life time.


Calculated values of capacitance cables with round conductors are shown in the table as a reference.



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