INDUSTRY COMPONENT

Splitter Plates

Splitter plates are insulating components in arc chutes that divide and extinguish electrical arcs in circuit breakers and switches.

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Component Specifications

Definition
Splitter plates are critical insulating components within arc chutes, designed to divide, cool, and extinguish electrical arcs generated during circuit interruption in medium to high-voltage electrical equipment. These plates create multiple series gaps that increase arc voltage, stretch the arc path, and facilitate rapid deionization through thermal quenching and magnetic blow-out effects, ensuring safe interruption of fault currents.
Working Principle
Splitter plates operate by dividing a single high-energy arc into multiple smaller arcs across series gaps, increasing total arc voltage beyond the system voltage to force extinction. The plates absorb heat through thermal mass, cool arc plasma via gas generation from ablative materials, and utilize magnetic fields to drive arcs into narrow slots for elongation and fragmentation, accelerating deionization and preventing re-strike.
Materials
High-temperature thermoset plastics (glass-reinforced melamine, phenolic resins), ceramic composites (alumina, silicon carbide), or arc-resistant polymers with additives for gas generation; thickness: 3-10mm, dielectric strength: >15kV/mm, thermal conductivity: 0.5-5 W/m·K.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Flame RatingUL94 V-0
Arc Resistance>180 seconds (ASTM D495)
Dielectric Strength15-30 kV/mm
Thickness Tolerance±0.2mm
Operating Temperature-40°C to 250°C
Comparative Tracking Index>600V (IEC 60112)

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 14647, IEC 62271-1, ASTM D619

Parent Products

This component is used in the following industrial products

Arc Chute

A safety component in electrical contactors designed to extinguish electric arcs that form when contacts open under load.

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Arc Chute / Extinguisher

A safety component within an output circuit breaker designed to extinguish the electrical arc that forms when contacts separate under load.

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Arc Chute/Extinguisher

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

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown under overvoltage
  • Thermal degradation from repeated arcing
  • Mechanical cracking due to thermal stress
  • Contamination reducing insulation resistance
FMEA Triads
Trigger: Material carbonization from prolonged arcing
Failure: Reduced dielectric strength leading to insulation failure
Mitigation: Use materials with high arc resistance and regular inspection for carbon deposits
Trigger: Thermal stress from rapid temperature changes
Failure: Cracking or delamination of plates
Mitigation: Design with thermal expansion matching and robust mounting; use materials with high thermal shock resistance
Trigger: Contamination by dust or moisture
Failure: Surface tracking and reduced insulation performance
Mitigation: Apply protective coatings; ensure sealed enclosures and regular maintenance cleaning

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Dimensional tolerance ±0.2mm; dielectric tolerance ±10% of rated voltage
Test Method
Dielectric withstand test per IEC 62271-1; arc resistance test per ASTM D495; thermal cycling per ISO 14647

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 Splitter Plates

Manufacturer profiles associated with Splitter Plates.

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Frequently Asked Questions

What is the primary function of splitter plates in arc chutes?

Splitter plates divide and cool electrical arcs to extinguish them quickly, preventing damage and ensuring safe circuit interruption in electrical equipment.

How do splitter plates improve arc interruption efficiency?

By creating multiple series gaps, they increase arc voltage, stretch the arc path, and enhance cooling through thermal absorption and gas generation from material decomposition.

What materials are commonly used for splitter plates?

High-temperature thermoset plastics (like glass-reinforced melamine), ceramic composites, and arc-resistant polymers with additives for improved dielectric and thermal properties.

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.

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