INDUSTRY COMPONENT

Shield Assembly

Shield Assembly for Medium Voltage Vacuum Interrupter Modules providing electromagnetic shielding and arc containment

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Component Specifications

Definition
A critical component in medium voltage vacuum interrupter modules designed to provide electromagnetic shielding, contain arcing phenomena, and maintain dielectric integrity during circuit interruption. It consists of multiple conductive and insulating layers arranged concentrically around the vacuum interrupter's contact system to manage electric field distribution and prevent external electromagnetic interference.
Working Principle
Operates on electromagnetic shielding principles using conductive materials to create a Faraday cage effect around the vacuum interrupter. During circuit interruption, it contains and dissipates electromagnetic energy from arcing, maintains uniform electric field distribution to prevent corona discharge, and provides thermal management through conductive heat transfer paths.
Materials
Multi-layer construction: Outer layer - Stainless steel 304/316 (0.8-1.2mm thickness), Intermediate layer - Copper mesh or foil (99.9% purity, 0.3-0.5mm), Inner layer - Ceramic insulator (Alumina Al2O3 95-99%, 3-5mm thickness), Fasteners - Stainless steel A2/A4 grade
Technical Parameters
  • Weight 0.5-2.5kg
  • Dimensions Custom per interrupter size
  • Voltage Rating 7.2-36kV
  • Temperature Range -40°C to +105°C
  • Dielectric Strength >30kV/mm
  • Shielding Effectiveness >40dB @ 100MHz-1GHz
Standards
ISO 14617-12, IEC 62271-1, IEC 62271-100, DIN EN 62271-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shield Assembly.

vacuum interrupter shield assembly medium voltage shielding electrical insulation components electromagnetic shielding arc containment vacuum circuit breaker parts Shield Assembly Shield Assembly in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Medium Voltage Vacuum Interrupter Module

Core vacuum switching component for medium voltage circuit breakers and contactors.

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown due to contamination
  • Reduced shielding effectiveness from material degradation
  • Thermal stress cracking in ceramic components
  • Corrosion in conductive layers affecting performance
FMEA Triads
Trigger: Contamination accumulation on insulating surfaces
Failure: Partial discharge leading to dielectric breakdown
Mitigation: Regular cleaning protocols and sealed assembly design
Trigger: Thermal cycling stress
Failure: Cracking in ceramic insulating layers
Mitigation: Use of thermal expansion-matched materials and stress-relief design features
Trigger: Corrosion of conductive layers
Failure: Reduced shielding effectiveness and increased contact resistance
Mitigation: Corrosion-resistant materials and protective coatings

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm dimensional tolerance, ±5% shielding effectiveness, dielectric withstand: 1.2 x rated voltage for 1 minute
Test Method
IEC 62271-100 for dielectric tests, IEC 61000-4-3 for electromagnetic compatibility, thermal cycling per IEC 60068-2-14

Buyer Feedback

★★★★☆ 4.9 / 5.0 (32 reviews)

"The technical documentation for this Shield Assembly is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Shield Assembly so far."

"Testing the Shield Assembly now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the primary function of the Shield Assembly in vacuum interrupters?

The primary functions are electromagnetic shielding to prevent interference, containment of arcing phenomena during circuit interruption, and maintaining dielectric integrity through controlled electric field distribution.

How does material selection affect Shield Assembly performance?

Material selection directly impacts shielding effectiveness, thermal management, and durability. Stainless steel provides structural integrity, copper offers optimal conductivity for shielding, and ceramic ensures dielectric strength and thermal stability.

What maintenance is required for Shield Assemblies?

Regular visual inspection for physical damage, cleaning of conductive surfaces to maintain contact integrity, and dielectric testing during scheduled maintenance intervals. Replacement is typically required only after visible damage or failed dielectric tests.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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