Low Voltage (600V)， Medium & High Voltage (25kV) XLPE Power Cable

Low Voltage (600V)， Medium & High Voltage (25kV) XLPE Power Cable

600V ~ 25KV XLPE Cables are composed of XLPE insulation, PVC outer- sheath, high thermal resistance of insulation and possess excellent electrical properties and low failure rates, suitable for power transmission & distribution, being the mainstream of high voltage cable nowadays. Besides, it is light in weight, easy to be installed and simple in terminal processing. PEWC has produced 25kV cables for more than 40 years.

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Low Voltage (600V)， Medium & High Voltage (25kV) XLPE Power Cable

Product Description

XLPE 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.

Characteristics of XLPE Power Cable

• 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, PEWC also recommends Low

Smoke Free Halogen materials which have the properties in low smoke,low toxic and

better flame retardant to enhance the function in safety protection.

Purposes of XLPE Power Cable

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：

• Transmission & Distribution Cable

• Aerial Cable

• Underground Cable

• Control Cable

• Low Voltage Cable

• High Voltage Drop Wire

• Submarine Cable

• Mining Cable

• Concentric Neutral Cable

Comparison of Characteristics between XLPE Power Cable and Other Power Cable

• 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 risen to 250℃ during short circuits condition (max. 5 seconds).

• 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

• Electrical Characteristics
The electrical characteristics of XLPE are similar to PE (before cross-linking) and better than EPR. The values are given 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

• Excellent Chemicals Resistance
XLPE possess good resistance in chemicals and atmosphere, more superior than PE, EPR and PVC.
The values are given as follows：
(H:High G:Good F: Fair P: Poor)

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%）	P	H	F	P

• Comparison of 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. 150
Ozone Resistance (0.03%)	--	>25days	>25days	>25days	>10days
Value after aging (121℃)	%	>80	>80	Molten	<30