INDUSTRY COMPONENT

Ceramic Insulator Housing

High-voltage ceramic housing for vacuum circuit breaker arc chutes providing electrical insulation and mechanical support.

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Component Specifications

Definition
A precision-engineered ceramic component that forms the insulating housing for medium voltage vacuum circuit breaker arc chutes, designed to withstand high electrical stress, thermal cycling, and mechanical forces while preventing electrical breakdown and arc flash propagation in switchgear applications.
Working Principle
Provides dielectric insulation between conductive parts in vacuum interrupters by utilizing ceramic's high resistivity and dielectric strength, while containing and directing arc plasma during circuit interruption to ensure safe arc extinction and prevent restrikes.
Materials
High-alumina ceramic (Al₂O₃ ≥ 95%), typically with controlled porosity <0.5%, fired at 1600-1700°C, with metallized surfaces (Mo-Mn or active brazing alloys) for hermetic sealing to metal end caps.
Technical Parameters
  • Leak Rate <1×10⁻¹² mbar·L/s (helium)
  • Flexural Strength ≥300 MPa
  • Surface Roughness Ra ≤ 0.8 μm
  • Volume Resistivity >10¹² Ω·cm at 500°C
  • Dielectric Strength ≥25 kV/mm
  • Thermal Conductivity 20-30 W/m·K
  • Operating Temperature -40°C to +500°C
Standards
ISO 14617-6, IEC 62271-100, DIN VDE 0670-1000, ASTM F19

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ceramic Insulator Housing.

ceramic insulator housing vacuum circuit breaker components arc chute insulation high-voltage ceramic parts electrical switchgear insulation alumina ceramic housing medium voltage insulation Ceramic Insulator Housing in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Medium Voltage Vacuum Circuit Breaker Arc Chute Assembly

Critical arc quenching component for medium voltage vacuum circuit breakers in electrical distribution systems.

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown under contamination
  • Mechanical fracture from thermal shock
  • Vacuum leakage at ceramic-metal joints
  • Surface tracking from moisture absorption
FMEA Triads
Trigger: Thermal stress from rapid temperature changes
Failure: Crack propagation leading to vacuum loss
Mitigation: Design with gradual thermal gradients, use ceramics with high thermal shock resistance, implement controlled heating/cooling cycles during operation
Trigger: Surface contamination accumulation
Failure: Reduced dielectric strength leading to flashover
Mitigation: Regular cleaning protocols, application of hydrophobic coatings, proper enclosure sealing to prevent contamination ingress
Trigger: Mechanical stress from improper installation
Failure: Fracture during operation or maintenance
Mitigation: Precision mounting fixtures, torque-controlled fastening, stress analysis during design phase

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerance ±0.2% or ±0.5mm (whichever is smaller), concentricity within 0.1mm TIR
Test Method
High-potential testing at 2× rated voltage + 1kV for 1 minute, helium leak testing per ASTM F2391, thermal cycling (-40°C to +125°C, 100 cycles)

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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A precision rotating shaft in transformer winding machines that holds and rotates the coil form during wire winding operations.
Arc Plates
Arc plates are metallic plates within circuit breaker arc chutes that split and cool electrical arcs during interruption to ensure safe circuit disconnection.

Frequently Asked Questions

Why is ceramic preferred over polymer for vacuum circuit breaker housings?

Ceramic offers superior dielectric strength at high temperatures, better thermal shock resistance, lower outgassing in vacuum, and maintains dimensional stability under electrical stress, crucial for maintaining vacuum integrity over decades of operation.

What maintenance is required for ceramic insulator housings?

Regular visual inspection for cracks or surface tracking, cleaning with non-abrasive solvents to prevent contamination buildup, and periodic dielectric testing. No routine replacement needed if properly installed and undamaged.

How are ceramic housings sealed to metal components?

Using metallization processes (Mo-Mn or active metal brazing) that create hermetic ceramic-metal joints capable of withstanding thermal cycling and mechanical stress while maintaining vacuum integrity.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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