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High Temperature GPO-3 Alternatives

High Temperature GPO-3 Alternatives

High Temperature GPO-3 Alternatives

(OP)
I am looking for cost effective alternatives to GPO-3. We currently have several units that we make out of GPO-3, however we are reaching temperatures in our unit of ~300°C (GPO-3 is only rated to 130°).
The material must have similar structural and electrical capabilites. Any ideas?

Thanks in advance for any help!
Fred S

RE: High Temperature GPO-3 Alternatives

The switchboards of old were made out of slate. That would probably meet the thermal and structural requirements. There are still a few of these boards in the UK in the older plants. They look like something from a Frankenstein movie.

I'm curious: what are you building?
  

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If we learn from our mistakes I'm getting a great education!
 

RE: High Temperature GPO-3 Alternatives

(OP)
Thanks for all the recommnedations- we are building a
Harmonic Filter Resistor-  

RE: High Temperature GPO-3 Alternatives

I assume that the conventional technique of a metal structure carrying individual porcelain insulators are unsuitable? That's the way Cressall build their big neutral earthing resistors - is this a similar design?
  

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If we learn from our mistakes I'm getting a great education!
 

RE: High Temperature GPO-3 Alternatives

(OP)
Cressal is actually a sister company to us- we are looking at pretty stringent space requirements and so require a little different design. We do however use many similar designs on our other products-   

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