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coaxial high current copper tube insulation

C

Chapuis

Jan 1, 1970
0
Dear All,

I am working on a project, I looks for coaxial high current copper tubes
assembly

Basically first tube surface should be coated hermetically by a ceramic
layer as insulator
a second tube having larger diameter will cover the first one coaxially and
again coated with a ceramic insulator.

Does some has an idea ? about this kind of assembly and where can i find

Thanks
 
B

Beachcomber

Jan 1, 1970
0
Dear All,

I am working on a project, I looks for coaxial high current copper tubes
assembly

Basically first tube surface should be coated hermetically by a ceramic
layer as insulator
a second tube having larger diameter will cover the first one coaxially and
again coated with a ceramic insulator.

Does some has an idea ? about this kind of assembly and where can i find

Thanks
Copper tube transmission line is quite commonly used in the broadcast
industry (TV and FM stations).

Check with Andrew Corporation, they may something you are looking for:

http://www.andrew.com/products/trans_line/ava/default.aspx
 
A

aflky

Jan 1, 1970
0
Chapuis said:
Dear All,

I am working on a project, I looks for coaxial high current copper tubes
assembly

Basically first tube surface should be coated hermetically by a ceramic
layer as insulator
a second tube having larger diameter will cover the first one coaxially and
again coated with a ceramic insulator.

Does some has an idea ? about this kind of assembly and where can i find

Thanks

What Frequency? What levels of current?
Why hermetically sealed?
Coating Copper with ceramic? Not good, will flake off.

Need more specifications or what your application is to determine next step.
 
M

mogwomp

Jan 1, 1970
0
Chapuis said:
Hello Aflky,
Frequency between 3 to 10 khz
Application is induction melting under vacuum that is why hermeticity
Coated with ceramic as insulator, alumina seems work good.
Voltage is variying 100 to 400 volts and power is max. 50 kwh.

I don't know exactly the reason of why they require coaxial solution
absolutely.
Seems much more easy to use 2 separated conductor flexible tube
Thanks
Pierre

Check the Induction Heating MFGRs.
They are probably using coax to keep the radiated emmissions down, or to go
through a glass seal.
 
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