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Copper-chromium (CuCr) Contact for Vacuum Interrupter

Copper-chromium (CuCr) Contact for Vacuum Interrupter
The CuCr contact materials have good performance of breaking and withstand voltage. We have set up four production lines for producing copper-chromium (CuCr) electrical contacts: 1.Vacuum casting
2.VCR(vacuum arc remelting)
3.Vacuum infiltration
4.Powder sintering
We have annual capacity of 8 million pieces of contact, and now have been the largest vacuum contact manufacturing base in the world.
Product Details:

Copper-chromium (CuCr) contact materials for  vacuum interrupter

Product Details:

1.The chemical composition and properties:

Material

Chemical Compositions (wt%)

Mechanical Properties

Cu

Cr

Gas Content

Hardness

HB (Mpa)

Density

(g/cm3)

Electrical Conductivity

(Ms/m)

O

N

CuCr50I

Balance

47.1-52.0

<0.050

<0.0040

80-120

≥7.90

≥16.0

CuCr10C

Balance

7.0-12.0

<0.050

<0.0030

70-100

≥8.60

≥40.0

CuCr25C

Balance

24.0-28.0

<0.080

<0.0050

70-105

≥8.30

≥28.0

CuCr30C

Balance

28.1-33.0

<0.080

<0.0050

75-110

≥8.20

≥26.0

CuCr40C

Balance

37.0-42.0

<0.080

<0.0050

80-120

≥8.00

≥20.0

CuCr40A

Balance

37.0-43.0

<0.060

<0.0030

85-125

≥8.00

≥20.0

CuCr50A

Balance

47.0-52.0

<0.060

<0.0030

85-140

≥7.90

≥18.0

CuCr25P

Balance

24.0-28.0

≤0.060

≤0.0050

70-105

≥8.10

≥28.0

CuCr30P

Balance

28.1-33.0

≤0.065

≤0.0050

75-110

≥7.90

≥26.0

Remark: C-vacuum casting;I-vacuum infiltration; A-vacuum arc-melting; P-Powder sintering

2.Some results of type tests as follow:


Material

Voltage

Contact   Size

Rated   current/Rated short-circuit current

CuCr50I

126kV

Ø100×5mm

2000A/40kA

40.5kV

Ø79×4.5mm

2000A/31.5kA

Ø76×5mm

 1600A/25kA

12kV

Ø70×4mm

1600A/40kA

Ø82×5mm

3150A/50kA

Ø122×6mm

6300A/80kA

3.At the customer's request, contact parts  can be customized by special design.


4. Free samples can be offered.


5. Contact material in VI.


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