Using Glastic on MV Bus Bar

[RiggsPSK]

I have an application where I have 4.16kV bus where I need the bus bars to have better rigidity where I am attaching lugs for cables. Everything is already supported by rated insulator posts, this would be in addition.

My mechanical guy wants to machine out some supports using Glastic (GPO-3) between the phases and possibly to the enclosure walls also.

My question: Can this be done not only under code, but from a practical sense also? Is the glastic enough of an insulator where I don't have to worry about the 4.16kV from either phase or ground? I already have 5" spacing between phases, and over 6" from nearest ground.

I have purchases supports in the past, but never tried cooking up our own glastic ones before.

Thank for any and all thoughts on this!

 

[Jraef]

You would likely have to have a Hi-Pot dielectric test done on the added supports and then a new BIL test on the gear itself after the supports are added.

 

[xptpcrewx]

Gear modifications will require UL field inspection/certification and approval by AHJ.

 

[Terminator5047]

I would be Leary of this because at high enough voltage dirt will conduct electricity and who knows how easy the dust will stick to that