Synthetic Arc-Quenching Fuse Tubes for MV/HV Links
Engineered arc-quenching liner materials for high clearing energy. Synthetic arc-quenching tubes are formulated to absorb and extinguish arc energy in MV/HV links. The material is selected against clearing current and voltage, not guessed. We build the liner or body in the specified arc-quenching grade and verify it against your qualification test plan. The material formulation absorbs arc energy
Engineered arc-quenching liner materials for high clearing energy. Synthetic arc-quenching tubes are formulated to absorb and extinguish arc energy in MV/HV links. The material is selected against clearing current and voltage, not guessed. We build the liner or body in the specified arc-quenching grade and verify it against your qualification test plan. The material formulation absorbs arc energy
Technical specifications
| Material | Synthetic arc-quenching composite |
| Use | MV/HV high-energy links |
| Qualification | Per your test plan |
| Standard | ASTM D7049 (melamine), IEC 60269 (fuse dimensions), UL 94 V-0. |
| Operating temperature | -40 °C to +130 °C (arc-facing up to 155 °C) |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- MV expulsion fuse outer barrels (arc-quenching vent side)
- High-breaking-capacity fuse bodies needing arc-steering grooves
- Switchgear fuse sleeves in aggressive switching duty
- Transformer and capacitor protection fuse barrels
- Drop-out fuse extinguisher bodies
- Fuse bodies with internal channels machined for gas expansion
Why glass melamine for this application
Glass-melamine tubes resist surface tracking under repeated arc exposure, so machined channels keep steering the products of quenching instead of carbonising a path. Higher arc resistance than vulcanized fibre makes it the first choice where the wall sees the arc.
Melamine swells under prolonged moisture + voltage. Seal end caps and specify conditioned stock for HV. Vent geometry is duty-specific, not a catalog default.
Standards: IEC 60269 / IEC 60282-1, ASTM D709 (glass-melamine), UL 94 V-0.
Feature and remaining-wall review
CNC turning and milling for precise dimensions; brittle material requires sharp, low-speed tools. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Ceramic-Filled Epoxy Fiberglass Tubes
Related insulation component from the WELLELE catalog.
Medium & High Voltage Fuse Link Bodies
Related insulation component from the WELLELE catalog.
G5/G9 Melamine Tubes
Related insulation component from the WELLELE catalog.
Common questions
What standards apply to melamine tubes?
ASTM D7049 (melamine), IEC 60269 (fuse dimensions), UL 94 V-0. Material COA supplied per batch.
Can melamine be threaded?
Yes. CNC threading is possible but brittleness requires sharp, low-speed tools. Feature depth and remaining wall must be reviewed per drawing.
Is melamine suitable for arc-facing applications?
Yes, for moderate-energy arcs. For high-clearing-energy MV/HV fuses, use ceramic-filled or synthetic arc-quenching composites.
What tolerance can you hold?
ID/OD ±0.05 mm standard; ±0.02 mm available with precision grinding on straight, unwound sections.
What makes a tube arc-quenching?
ID/OD ±0.05 mm standard; ±0.02 mm available with precision grinding on straight, unwound sections.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Synthetic Arc-Quenching Fuse Tubes for MV/HV Links
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.