Arc Splitter Plates: Plate Thickness 1.5-3.0 mm

Component Specifications

Definition

Arc splitter plates are precision-engineered metallic plates installed within arc chambers of circuit breakers, contactors, and switchgear. Their primary function is to split a single high-energy electrical arc into multiple smaller arcs, increasing the total arc voltage beyond the system voltage, thereby forcing arc extinction. These plates are arranged in parallel stacks with insulating barriers to create arc chutes that cool, elongate, and deionize the plasma, preventing arc re-ignition and protecting electrical equipment from thermal damage.

Working Principle

When an electrical fault occurs, contacts separate and create an arc. The arc is magnetically or thermally driven into the stack of splitter plates. Each plate acts as an additional anode/cathode pair, dividing the arc into series segments. This segmentation increases the total arc voltage drop, while the plates absorb heat and promote cooling through radiation and convection. The metallic plates also emit metal vapor that deionizes the arc path, increasing dielectric strength and preventing restrike.

Materials

Copper alloys (C11000, C14500) for high conductivity and arc resistance, sometimes with silver or tin plating; steel plates with copper coating; arc-resistant materials like chrome-copper or tungsten composites for extreme conditions. Insulating spacers made of ceramic, mica, or high-temperature plastics.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Plate Spacing	2-8 mm
Plate Thickness	1.5-3.0 mm
Operating Voltage	Up to 38 kV
Dielectric Strength	>30 kV/mm
Fault Current Rating	10-63 kA
Temperature Resistance	Up to 3000°C (arc contact)

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

Standards

ISO 14617-6, IEC 62271-1, ANSI/IEEE C37.04

Parent Products

This component is used in the following industrial products

Arc Chamber

A safety component in DC switches/isolators designed to contain, cool, and extinguish electrical arcs during circuit interruption.

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Engineering Analysis

Risks & Mitigation

Arc flash incidents
Thermal degradation of materials
Plate erosion reducing effectiveness
Insufficient cooling leading to restrike
Misalignment causing arc bypass

FMEA Triads

Trigger: Material erosion from repeated arcing
Failure: Reduced plate thickness decreases arc splitting efficiency
Mitigation: Regular inspection and replacement schedules; use erosion-resistant alloys

Trigger: Contamination or oxidation on plate surfaces
Failure: Increased contact resistance and poor arc transfer
Mitigation: Protective coatings; controlled environment sealing

Trigger: Mechanical vibration loosening plate stack
Failure: Misalignment allows arc to bypass plates
Mitigation: Secure fastening systems; vibration-resistant mounting

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm plate thickness, ±0.2 mm spacing uniformity

Test Method

High-current arc testing per IEC 62271-100; dielectric withstand testing; thermal cycling tests

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 Splitter Plates

Manufacturer profiles associated with Arc Splitter Plates.

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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 main purpose of arc splitter plates?

To safely extinguish electrical arcs by dividing them into smaller segments, increasing voltage drop and promoting cooling to prevent equipment damage.

Can arc splitter plates be reused after operation?

No, they are typically replaced after significant arc interruption as the surfaces erode and lose effectiveness.

What happens if arc splitter plates fail?

Failure can lead to sustained arcing, equipment explosion, fire hazards, and complete system failure due to thermal damage.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Arc Splitter Plates