There is any problem in to connect two busbar of copper with bolt? 1

[Engenharia7]

Hello, Everyone!

There is any problem in to connect two busbar of cooper with bolt in medium voltage?
In this cause couldn't problem of heating

Thank so much!

 

[DTR2011]

It is very common for MV busbar to be connected in sections via a bolt(s). As a matter of fact, in many metal clad swgr applications the internal pieces would not fit as a single unit without having several different sections and bends. I'm no expert in this, but from what I've seen it's generally a (NEMA) 4 bolt connection. In modern SWGR, there is a
plastic boot that covers the connection. As far as the amount of overlap, hole size, hardware type, bolt torque & preparing each surface to be mated (tinning), I would check with experts.

 

[JG2828]

Yes, copper bus is connected with bolts. Here is a good, short, writeup on the subject.

https://www.powellind.com/sites/downloads/ProductAssets/01.4TB.053 Hardware for Bus Connections.pdf

 

[catserveng]

That was a nice summary article, thanks for sharing it.

MikeL.

 

[Engenharia7]

Thanks everyone for your time
It's help me a lot

 

[prc]

High tensile steel bolts and nuts are sufficient and these will not get heated by the flux from the current in bus bars. So stainless steel hard wares are not required unless from corrosion point of view. Large steel plain washers on either side are required to avoid metal flow in soft copper/aluminum. Belleville washer(disc spring) on either or one side will take care the differential thermal expansion.Spring washer instead of disc spring is not effective.