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Power Cables

 

Type Of Power Cable

 

This power cable which has the XLPE insulation,PVC outer-sheath, good heat resistance of insulation, excellent electrical properties and low fault rate is suitable for transmission & distribution wiring and is the mainstream of high voltage cable nowadays. The allowable conductor temperature is max. 90℃ during normal continuous operating, max. 130℃ during normal emergency (not exceed 3 times within 12 consecutive months and not exceed 36 hours per each duration) and max.

 

250℃ during short circuit (Max. short circuit period not exceed 5 seconds). Besides, it is light in weight, easy to be installed and simple in terminal processing.

 

Max. conductor temperature 90℃ in normal continuous operation.
Larger Ampacity and Short Circuit Current Capacity while same conductor size.
Low Fault rate during overload period or short circuit.
Good Heat Resistance & Moisture Resistance, etc.
Good Resistance in Chemicals and atmosphere.
Excellent abrasion and cracking resistance.
Smaller overall diameter, Lighter Weight, Easy to be installed.
Simple and easy in Jointing and Termination.
Outer-sheath materials can be PVC or PE. Besides, the Company also recommend Low Smoke Free Halogen materials which have the properties in low smoke, low toxic and better flame retardancy to enhance the function in safety protection.

 

XLPE cable is suitable in low and high voltage Transmission & Distribution Wiring wherever in aerial, direct buried or Drawn In Pipes.
The main category of XLPE cable is classified as follows :
1.Transmission & Distribution Cable 4. Control Cable 7. Submarine Cable
2. Aerial Cable 5. Low Voltage Cable 8. Mining Cable
3. Underground cable 6. High Voltage Drop Wire 9. Concentric Neutral Cable

 

1. Deformation of Heat Resistance:
 

When PE cable is in overload or short-circuits condition, its temperature rises to 100℃ and PE insulation will become molten and soften then finally deformed. However, for XLPE cable, even if the distribution system incidents happened and its temperature rose to 130℃, it will not affect the cable life. The temperature can be rose to 250℃ during short circuits condition (max. 5 seconds).

   
2. Higher Operating Temperature:
 

Table of Operating Temperature VS Insulation Materials:

 

Condition

EPR

XLPE

PE

PVC

Normal Continuous Operating (Max.)

90

90

75

60

Emergency/Overload

130

130

95

100

Short Circuit
(Max. 5 seconds)

250

250

150

150

   
3. Electrical Characteristics:
 

The electrical characteristics of XLPE are similar to PE (before cross-linking) and better than EPR, the value is as follows:

 

Item

Unit

EPR

XLPE

PE

PVC

Volume Resistivity

Ω-cm

>1015

>1016

>1016

>1012

Dielectric Strength

V/mil

800

1000

1000

500

Dielectric Constant

3.5

2.3

2.3

4~7

Power Factor

%

1.5

<0.2

<0.2

>4

   
4. Excellent Chemicals Resistance:
 

XLPE possess good resistance in chemicals and atmosphere, more superior than PE, EPR, PVC, the values are given as follows :

 

Chemicals

EPR

XLPE

PE

PVC

Sulfuric Acid (30%)

H

H

H

H

Sodium Hydroxide (10%)

H

H

H

H

Alcohol  

H

H

G

G

Acetone (60%)

H

H

G

F

Dichloroethane  

P

G

P

P

Nitric Acid (10%)

H

H

H

H

Hydrochloric Acid (10%)

H

H

H

H

Acetic Acid (5%)

H

H

H

G

Lubricating Oil  

P

H

F

G

Gasoline (35%)

H

H

F

P

  H: High G: Good F: Fair P: Poor
   
5. Comparison between Physical & Other Properties:
 

Item

Unit

EPR

XLPE

PE

PVC

Tensile Strength

kgf/mm²

Min. 0.5

Min. 1.27

Min. 1.0

Min. 1.0

Elongation

%

Min. 300

Min. 350

Min. 350

Min. 350

Ozone Resistance (0.03%)

>25days

>25days

>25days

>10days

Value after aging (121℃)

%

>80

>80

Molten

<30

 

Type of XLPE Power Cable

Datasheet download

Type of XLPE Power Cable

Datasheet download
600V XLPE Power Cable
8kV XLPE Power Cable
2kV XLPE Power Cable
15kV XLPE Power Cable -CNS
3.3kV XLPE Power Cable
15kV XLPE Power Cable-A043
5kV XLPE Power Cable
25kV XLPE Power Cable-CNS
6.6kV XLPE Power Cable
25kV XLPE Power Cable-A043

 

Current Carrying Capacity Table
Formula of calculating electrical parameters
Rating Factor Table