Water Tree Retardant XLPE Compound for 10KV and Below Power Cable

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Product Description:

Main Properties & Typical Values

Test Items

Unit

Test Method

Standard

Typical value

Tensile strength

MPa

GB/T1040.3

≥13.5

24.3

Elongation at break

%

GB/T1040.3

≥350

514

Heat ageing properties (Test temperature 135℃, 168hr)

Maximum tensile strength change      

Maximum elongation at break change

%

%

GB/T8815

±20

±20

8

0

Heat elongation (200±3)℃x15minx0.2MPa)

Maximum elongation change under load      

Maximum permanent elongation change after cooled

%

%

GB/T2951

≤80

≤5

55

0

Impact brittle temp. (-76℃)  

Impact brittle

Failure no.

GB/T5470

≤15/30

pass

Dielectric Strength

MV/m

GB/T1408.1

≥25

35

Dielectric loss factor 50Hz, 20℃

--

GB/T 1409

≤5×10-4

2.1×10-4

Dielectric constant 50Hz, 20℃

--

GB/T1409

≤2.35

2.24

Volume resistance (20℃)

Ω·m

GB/T 1410

≥1×1014

3.1×1014

Gel content

%

JB/T10437

≥80

85

*Relative size of water tree growth

%

Q/GHPX 114

≤50

35

Note: *Technical property meaning:The percentage of water tree growth size of the water tree retardant XLPE compound


All typical values were tested by press moulding sample under the condition of 180±2 ℃,15min, and pressure over 15Mpa, then cooling to room temperature


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