Industry-Verified Manufacturing Data (2026)

Magnetic Field Coil

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Magnetic Field Coil used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Magnetic Field Coil is characterized by the integration of Coil Windings and Insulation Layer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper (windings) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An electromagnetic coil designed to generate a controlled magnetic field within a vacuum circuit breaker's arc chute assembly.

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Product Specifications

Technical details and manufacturing context for Magnetic Field Coil

Definition
A specialized electromagnetic component within the Medium Voltage Vacuum Circuit Breaker Arc Chute Assembly that produces a precisely oriented magnetic field to control and extinguish electrical arcs during circuit interruption by forcing the arc to rotate rapidly, preventing stationary arc spots and facilitating efficient arc quenching in the vacuum environment.
Working Principle
When current flows through the coil windings, it generates a magnetic field perpendicular to the arc path. This magnetic field interacts with the arc plasma (a current-carrying conductor), applying a Lorentz force that causes the arc to rotate rapidly around the contacts, distributing thermal energy evenly and preventing localized overheating, which aids in rapid arc extinction and contact protection.
Common Materials
Copper (windings), High-temperature insulation (e.g., polyimide film), Stainless steel or aluminum (structural support)
Technical Parameters
  • Coil diameter and dimensions must match arc chute geometry for optimal magnetic field distribution (mm) Per Request
Components / BOM
  • Coil Windings
    Conduct current to generate magnetic field
    Material: Copper
  • Insulation Layer
    Prevent electrical shorts between windings and to ground
    Material: Polyimide film or ceramic
  • Terminal Connectors
    Provide electrical connection points to circuit breaker system
    Material: Copper alloy
Engineering Reasoning
0.5-2.5 Tesla magnetic flux density at 20-100 A coil current
Coil temperature exceeding 180°C (Class H insulation limit) or magnetic flux density exceeding 3.0 Tesla (saturation threshold)
Design Rationale: Joule heating (I²R losses) exceeding thermal dissipation capacity, causing insulation breakdown via pyrolysis at 180°C; magnetic saturation at 3.0 Tesla reduces permeability to μ≈μ₀
Risk Mitigation (FMEA)
Trigger Coil current exceeding 120 A due to control system fault
Mode: Insulation carbonization and inter-turn short circuit
Strategy: Embedded NTC thermistor with 150°C trip point in coil winding
Trigger Mechanical vibration at 120 Hz resonance frequency from adjacent equipment
Mode: Wire fatigue fracture at bending stress > 200 MPa
Strategy: Epoxy vacuum impregnation with 95% fill ratio and vibration damping mounts

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Magnetic Field Coil.

vacuum circuit breaker magnetic coil arc chute electromagnetic coil high-temperature insulated copper coil magnetic field coil for electrical equipment custom magnetic coil manufacturing

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 10^-6 mbar (vacuum environment)
other spec: Max current density: 5 A/mm², Insulation resistance: >100 MΩ at 500VDC
temperature: -40°C to +150°C (operating), up to +200°C (peak transient)
Media Compatibility
✓ SF6 gas environment ✓ Vacuum (10^-3 to 10^-6 mbar) ✓ Dry air/nitrogen atmosphere
Unsuitable: Corrosive/conductive particulate environments (e.g., metal dust, salt spray)
Sizing Data Required
  • Required magnetic field strength (Tesla)
  • Available coil space dimensions (mm)
  • Power supply characteristics (VDC/Amp rating)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation Breakdown
Cause: Thermal cycling and overheating leading to degradation of insulating materials, often exacerbated by voltage spikes or poor cooling.
Coil Short Circuit
Cause: Mechanical vibration causing wire abrasion or insulation damage, or contamination (e.g., metallic debris, moisture) creating conductive paths between windings.
Maintenance Indicators
  • Audible buzzing or humming louder than normal operation, indicating loose windings or arcing.
  • Visible discoloration, charring, or smoke from the coil, signaling overheating or insulation failure.
Engineering Tips
  • Implement regular thermal imaging inspections to detect hotspots early and ensure cooling systems (e.g., fans, heat sinks) are clean and functional.
  • Use vibration analysis and mounting checks to minimize mechanical stress on the coil, and apply protective coatings or enclosures to shield against contaminants.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems IEC 60034-1 - Rotating Electrical Machines EN 61000-6-2 - Electromagnetic Compatibility (EMC)
Manufacturing Precision
  • Coil Winding Pitch: +/- 0.5% of nominal
  • Coil Resistance: +/- 2% of specified value
Quality Inspection
  • High Potential (Hi-Pot) Test - Dielectric Strength
  • Inductance Measurement Test - LCR Meter Verification

Factories Producing Magnetic Field Coil

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

S Sourcing Manager from United Arab Emirates Jan 04, 2026
★★★★★
"Found 16+ suppliers for Magnetic Field Coil on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from Australia Jan 01, 2026
★★★★☆
"The technical documentation for this Magnetic Field Coil is very thorough, especially regarding technical reliability. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Singapore Dec 29, 2025
★★★★★
"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Magnetic Field Coil so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

19 sourcing managers are analyzing this specification now. Last inquiry for Magnetic Field Coil from Vietnam (45m ago).

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Frequently Asked Questions

What are the key benefits of using copper windings in magnetic field coils?

Copper windings provide excellent electrical conductivity, thermal efficiency, and durability, ensuring consistent magnetic field generation and long-term reliability in demanding electrical applications.

How does this coil enhance vacuum circuit breaker performance?

The coil generates a controlled magnetic field that efficiently directs and extinguishes arcs within the arc chute assembly, improving breaker reliability, reducing maintenance, and extending equipment lifespan.

What insulation materials are recommended for high-temperature applications?

Polyimide film insulation is ideal for high-temperature environments, offering superior thermal stability, electrical insulation, and resistance to degradation in vacuum circuit breaker operations.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Electrical Equipment Manufacturing sector.

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