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Covered conductors with voltage stabilizing inner layer

A conductor and inner layer technology, applied in the field of polymer compositions, can solve problems such as poor compatibility, and achieve the effect of improving compatibility and reducing voltage stabilizers

Active Publication Date: 2016-06-08
UNION CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional voltage stabilizers, such as the polycyclic aromatic compound family, such as acene, are poorly compatible with polyolefins

Method used

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  • Covered conductors with voltage stabilizing inner layer
  • Covered conductors with voltage stabilizing inner layer
  • Covered conductors with voltage stabilizing inner layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Example 1 contains 1.4% by weight 2-[4,6-bis(2,4-xylenyl)-1,3,5-triazin-2-yl]-5-(octyloxy)phenol (CAS2725-22-6, available LDPE from Cytec Industries).

Embodiment 2

[0088] Example 2 contains 2.8% by weight LDPE.

[0089] Comparative sample A is LDPE without a voltage stabilizer mixed at a temperature of 140°C.

[0090] Comparative sample B is LDPE containing 1% by weight of Chimassorb 944 (a hindered amine stabilizer).

[0091] Comparative sample C is LDPE containing 1% by weight of Cyassorb UV-3346 (a light stabilizer).

[0092] Comparative sample A (CS-A)

[0093] A series of 18 samples of Comparative Sample A were fitted to a 2-parameter Weibull failure distribution. The data showed significant non-linearity, resulting in poor correlation (r^2 is 0.75). It is found that the 3-parameter Weibull failure distribution is more suitable for describing the failure distribution (r^2 is 0.88), and the offset t0=8.8kV. After measurement, the 3-parameter Weibull characteristic voltage of comparative sample A is 11.7kV, and its 90% confidence interval is 10.7-13.7kV.

[0094] Comparative sample B (CS-B)

[0095] According to the same manner as the LDPE co...

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PUM

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Abstract

Polymer compositions having increased breakdown strength are disclosed. The polymer composition contains a polyolefin and a voltage stabilizer. The voltage stabilizer contains triazine. The triazine may include substituents that enable keto-enol tautomerization that would provide the voltage stabilizer with additional energy dissipation capability. The polymer composition of the present invention exhibits increased breakdown strength when applied as an insulation layer for power cables.

Description

Background technique [0001] A typical power cable includes one or more conductors in a cable core surrounded by one or more layers of polymeric material. Medium voltage (6-36kV) and high voltage (greater than 36kV) and ultra-high voltage (greater than 220kV) cables usually include a core surrounded by an inner semiconducting layer with an insulating layer outside the inner semiconducting layer, and then an outer semiconducting layer Layer and outermost layer (or protective sleeve). [0002] The carrying capacity of the cable system is partially limited by the heat transfer away from the conductor. Polyolefins (such as polyethylene) are often used in insulating and / or semiconducting layers. Polyethylene has low dielectric permittivity and relatively high electrical breakdown strength. [0003] A voltage stabilizer of a polyolefin composition is known, which increases the electrical breakdown strength of the insulating layer in a power cable. However, conventional voltage stabiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/44C08K5/3492H01B7/28H01B9/00
CPCC08K5/3492H01B3/441H01B7/2813C08L23/02H01B3/30H01B7/28H01B9/00
Inventor T.J.珀森J.M.科根
Owner UNION CARBIDE CORP
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