CuW Conductor for MV Switchgear

CuW conductor is a current-carrying element used where a section of an MV switchgear current path needs arc-resistant material, typically a short CuW segment inserted into a longer copper conductor at a make/break interface or at an arc-exposed connection point.

This is a basic conductor element listing, straight CuW with standard cross-sections, suitable for as-supplied use or for further machining into a finished contact assembly. For full rod stock see CuW Conductive Rod; for custom geometries see CuW Alloy Custom Component.

Specifications

Property	Value
Material Grade	CuW70 / CuW75 / CuW80
Tungsten Content	70, 75, or 80 wt%
Form	Straight conductor (round or square cross-section)
Cross-Section Range	Per drawing
Length Range	Per drawing
Tolerance	Per drawing
End Condition	Sawn (default) or faced; specify on order
Surface Treatment	As machined; silver plating optional
Electrical Conductivity	32–45% IACS depending on grade (per ASTM B702 typical)
Density	13.0–15.0 g/cm³ depending on grade
Working Voltage	Common MV ratings: 12 / 24 / 40.5 kV
Working Current	Application-specific; confirmed per design

Exact certified properties for your lot are available with material documentation on request.

Applications

• Arc-resistant insert in MV switchgear current paths at make/break interfaces
• CuW segment in compound conductors (Cu + CuW + Cu) for refurbishment programs
• Sub-supply to switchgear assemblers needing standard CuW conductor stock
• Replacement element in existing switchgear designs specifying CuW in the current path

Technical Notes

CuW conductor used in compound conductor designs (e.g. a copper bus with a short CuW section at a contact interface) gains the arc resistance of CuW only at the segment that needs it, while keeping the rest of the path in lower-cost copper. The joint between the CuW segment and the copper sections is typically brazed; the joint design affects both current carrying and mechanical strength.

For ordering, the difference between this SKU and the CuW Conductive Rod is intent: this listing is for as-installed or near-final use as a conductor element; the rod listing is for raw stock to be machined further. Operationally both are CuW bar with similar properties; choose the listing that matches your application.

Sourcing & OEM

Standard cross-sections and lengths produced to order. Plating, MOQ, and lead time vary by specification; contact us with your spec for a project-specific quote.