Arc Runner/Horn: Voltage Rating Up to 38kV

Q: What is the primary function of an arc runner/horn?

To attract and guide electrical arcs into the arc chute for safe extinguishment, protecting contacts and equipment.

Q: How does material selection impact arc runner performance?

Materials like copper-tungsten offer high conductivity and erosion resistance, crucial for durability and efficient arc movement under high thermal stress.

Component Specifications

Definition

The arc runner/horn is a precisely engineered conductive component within an arc chute/extinguisher system, designed to attract, guide, and elongate electrical arcs away from main contacts during circuit interruption. It facilitates arc movement into the quenching chamber where it is cooled, split, and extinguished, preventing damage to equipment and ensuring safe operation.

Working Principle

Works by providing a low-resistance, thermally conductive path that attracts the arc due to electromagnetic forces and thermal ionization. It directs the arc into arc splitter plates within the chute, increasing its length and surface area to enhance cooling and deionization, ultimately achieving current zero and extinction.

Materials

Typically made from copper alloys (e.g., copper-chromium, copper-tungsten) or silver-based composites for high electrical conductivity, thermal resistance, and arc erosion resistance. May include ceramic or refractory metal coatings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Current Rating	630A to 4000A
Material Grade	CuCr25 or equivalent
Voltage Rating	Up to 38kV
Arc Withstand Time	<100ms
Operating Temperature	-40°C to 125°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 62271-1, IEEE C37.04

Parent Products

This component is used in the following industrial products

Arc Chute/Extinguisher

A safety component in circuit breakers designed to extinguish electrical arcs that form when contacts separate during interruption.

View Product Details

Engineering Analysis

Risks & Mitigation

Arc flash hazards if improperly designed
Material degradation from repeated arcing
Misalignment causing ineffective arc guidance

FMEA Triads

Trigger: Material fatigue from thermal cycling
Failure: Reduced conductivity and arc guidance failure
Mitigation: Use high-grade alloys and regular thermal inspections

Trigger: Contamination or oxidation on surfaces
Failure: Increased contact resistance and erratic arc movement
Mitigation: Apply protective coatings and ensure clean installation environments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5mm dimensional tolerance per IEC 62271-100

Test Method

High-current arc testing per IEEE C37.09 for endurance and performance validation

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Arc Runner/Horn

Manufacturer profiles associated with Arc Runner/Horn.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of an arc runner/horn?