行业组件数据 · 2026

绝缘外壳

Insulating housing for circuit breaker arc chutes that provides electrical isolation and thermal protection.

技术定义与适配语境
典型 绝缘外壳 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

A critical insulating component in circuit breaker arc chutes designed to contain and extinguish electrical arcs during fault interruption. It prevents arc flashover to adjacent components, withstands high temperatures up to 3000°C momentarily, and maintains dielectric strength under extreme electrical and thermal stress. The housing channels arc plasma through quenching plates while preventing tracking or carbonization that could compromise insulation.

组件规格

定义
A critical insulating component in circuit breaker arc chutes designed to contain and extinguish electrical arcs during fault interruption. It prevents arc flashover to adjacent components, withstands high temperatures up to 3000°C momentarily, and maintains dielectric strength under extreme electrical and thermal stress. The housing channels arc plasma through quenching plates while preventing tracking or carbonization that could compromise insulation.
工作原理
Works by providing high dielectric resistance (typically >20 kV/mm) to isolate live parts, with arc-resistant materials that decompose endothermically to absorb thermal energy. The geometry creates turbulence in arc plasma flow, enhancing cooling and deionization while preventing restrike. Thermal management occurs through material ablation and gas generation that displaces ionized gases.
材料
Glass-reinforced thermoset polymers (GRP)mineral-filled phenolic resinsor ceramic composites. Common specifications: DMC (Dough Molding Compound) with 15-25% glass fiberthermal class 180°C minimumCTI >600VUL94 V-0 rated. High-performance versions use alumina-filled silicone or polyimide for extreme environments.
Flame Rating
UL94 V-0
Arc Resistance
>180 seconds
Volume Resistivity
>10^12 Ω·cm
Dielectric Strength
>20 kV/mm
Comparative Tracking Index
>600 V
Heat Deflection Temperature
>200°C
标准
IEC 62271-1IEC 60947-2ASTM D495UL 746A

行业分类与别名

绝缘外壳 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Surface contamination from dust or moisture->Reduced dielectric strength leading to flashover->Regular cleaning, hydrophobic coatings, sealed designs
Repeated thermal cycling->Microcracking and loss of mechanical integrity->Thermal stress analysis, crack-resistant materials, expansion joints
Partial discharge in voids->Progressive insulation degradation->Vacuum impregnation, void-free molding, partial discharge testing

工业生态与工程逻辑

0
Dielectric breakdown under contamination
1
Thermal degradation reducing insulation
2
Tracking formation on surface
3
Mechanical cracking from thermal shock

合规与检测

tolerance
±0.5mm on critical dimensions, surface roughness Ra < 3.2μm
test method
Dielectric withstand test per IEC 60243, tracking resistance per IEC 60112, thermal cycling per IEC 60068-2-14

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of an insulating housing in arc chutes?

To electrically isolate arc plasma from surrounding components while withstanding extreme thermal and electrical stresses during fault interruption.

Why are thermoset materials preferred over thermoplastics?

Thermosets maintain dimensional stability at high temperatures, have better arc resistance, and don't melt or drip during arc events.

How does housing geometry affect arc quenching?

Specific geometries create turbulence that cools plasma, elongate arcs to increase voltage drop, and direct decomposition gases to deionize the path.

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CNFX Industrial Component Index · 电气设备制造

数据基础

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初步技术归类
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请求制造能力信息: 绝缘外壳

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URN:CNFX:ME:UNIT:INSULATING_HOUSING