产品详情
CuCr25 真空灭弧室触头
CuCr25 真空灭弧室触头。铜铬触头片及按图零件。
技术问答
关于此产品的常见问题。
Why CuCr25 rather than CuCr50 for a standard VCB?
CuCr25 has higher conductivity (≥28 MS/m vs ≥16 MS/m for CuCr50), so it runs cooler under continuous current, the dominant duty in distribution-class breakers. CuCr50's advantages (lower chopping current, better anti-weld) matter most at higher interruption ratings and in capacitor / generator switching. Match the grade to your duty.
Is CuCr25 cast or sintered?
CuCr25 is typically produced by casting or vacuum induction melting, which gives high conductivity and a fine chromium distribution. Higher-chromium CuCr50 is typically infiltrated. Both processes meet GB/T 26867-2011 for their respective grades.
Can you supply the contact pre-brazed to a copper stem?
Yes. CuCr contact brazed to a copper or copper-alloy conductive stem as a sub-assembly is routine. Specify both the contact and the stem drawing.
What contact geometries are available in CuCr25?
Flat butt for lower ratings, AMF (axial magnetic field) and RMF (radial magnetic field) for higher ratings. See CuCr Contact Disc for geometry detail. Made to your drawing.
Are CuCr25 contacts compliant with GB/T 26867-2011?
Yes. Material specifications follow GB/T 26867-2011 minimums (≥8.25 g/cm³, ≥28 MS/m, ≥70 HB, gas content within limits). Material certification per lot available on request.
What is the typical lead time?
Lead time varies by geometry, dimensions, quantity, and any pre-brazed stem assembly. Contact us with your specifications.
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