Copper-chromium (CuCr) Contact for Vacuum Interrupter

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)
	Cu	Cr	O	N	Hardness HB (Mpa)	Density (g/cm3)	Electrical Conductivity (Ms/m)
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
	40.5kV	Ø76×5mm	1600A/25kA
	12kV	Ø70×4mm	1600A/40kA
		Ø82×5mm	3150A/50kA
		Ø122×6mm	6300A/80kA