switch gear wire 3

[GOTWW]

what is switch gear wire, is that an "European" term. I gather that it is basically an over-insulated flexible wire for jumpers on MV instrumentation. Is there a US equivalent?

 

[davidbeach]

Type SIS.

 

[GOTWW]

Type SIS appears to be 600V rated. Is this what someone would use to hook-up a MV PT in say, inside the HV compartment of a Padmount XFMER?, routed carefully of course.

 

[busbar]

One product is called [slang, maybe?] “Natvar rod”—a round, semi-rigid solid-copper conductor with an orange plastic covering. It was not insulated for phase-to-ground contact, but likely to resist incidental contact in >600V applications. One use is in metalclad gear for instrument-transformer and arrester jumpers.

Can’t find a link for the material.

 

[davidbeach]

No SIS would not be the wire for VT primary connections. There is an insulated, but not shielded, conductor used for VT primaries, but I don't have the type at hand.

 

[GOTWW]

I have been looking at machine and apparatus wire #8 minimum
good for 5KV. But I remember working with high voltage microwave tubes that used a #14- #10 colored (PFTE?) that was used up to 30kV.

However, I do not think it was that good because I remember showing a tube to a sales rep. He said what is the pretty blue wire for?, shortly before being knocked to his butt.

The tube manufacturer quickly issued saftey bulletin for this!

 

[alehman]

This is commonly accomplished with 15kV rated cable from which the shield and semicon have been removed. You could try one of these also.

http://appprod.mysouthwire.com/ProductCatalog/XTEInterfaceServlet?contentKey=prodcatsheet49

http://appprod.mysouthwire.com/ProductCatalog/XTEInterfaceServlet?contentKey=prodcatsheet189

 

[busbar]

The material in §G of

http://www.ciic.com/pphlogger/dlcou...http://www.whsalisbury.com/images/catalog.pdf

makes decent ‘fully rated’ 15/25/35kV jumpers for use inside metalclad MV gear/unit substations. Midspan it may be supported by drilled Micarta or FRP sheet, spaced about the same distance as transfomer bushings or switch/breaker poles. Another means of support are Glastic knobs.

 

[GOTWW]

mucho gracias