Bus Bar Temp Too High

• Reduce the load.
• Tighten the fastenings
• Ventilate it better
• Etc.

First acquire an infrared thermometer and locate the source of the heat. It maybe just as simple as a loose connection as PWSlack refers to tighten the fastenings.

Bus bar is under rated! Fit bigger

Hi:

If this is the original design and it used to work just fine; then most likely you have a poor connection between two copper plates, which causes the metal to overheat, erode and make it a worse contact 'till it self destructs.

Hopefully you're in time to disassemble it, rectify the surfaces, cover them with Cool-Amp and make a tight connection; and now that you're embarked, replace all isolators and check for clogged water lines as well.

Who sized this busbar?. What factors were considered while sizing?. Did they consider ambient temp,ventilation,emissivity/purity of copper,gap between phases/earth etc. Is the load constant or cyclic or with periodic peaks?.

"...too high ..."

Two words unexpected from an engineer!

Temperature is ___ degrees C

Acceptance criteris is ____ degrees C

Acceptance criteria is from ____ documnet or standard.

Fill in the blanks.

Many technicians and work supervisors come to me with "..too high..."

I hate thermography cameras and handheld infrared temperature measuring devices.

I always ask, is the paint blistered? Is the electrical tap insulation bubbled up?

I'll bet your bus bar ran fine until you implemented a temperature monitoring program, right?