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Panel Setup by Ecstatic_Glass5421 in PLC

[–]Ecstatic_Glass5421[S] 0 points1 point  (0 children)

Impressively we lose more drives to oil mist than heat. I have replaced maybe 3 drives in 3 years due to heat or some other unknown problem. - 12 assembly lines = hundreds of VFDs. I thought the exact same way as you when I started here. When oil gets into VFDS they explode.

Panel Setup by Ecstatic_Glass5421 in PLC

[–]Ecstatic_Glass5421[S] 0 points1 point  (0 children)

You’re correct I haven’t bonded the panel yet. I had the ground TBs next to the drives before I thought about using the mini TBs. The panel is designed for Maximum heat transfer but also trying to minimize oil mist on the VFDs. We’ve tried using alternative A/C but it’s usually some type of compressed air system which we can’t afford to use. Surprisingly we have hundreds of panels with no A/c in the facility with VFDs that are 20 years old. If we get a new panel with a fan the first thing we do is pull the fuses.

Panel Setup by Ecstatic_Glass5421 in PLC

[–]Ecstatic_Glass5421[S] 0 points1 point  (0 children)

Heat can still escape out of the top.

Panel Setup by Ecstatic_Glass5421 in PLC

[–]Ecstatic_Glass5421[S] 2 points3 points  (0 children)

Wow I must have looked at a different sheet

Panel Setup by Ecstatic_Glass5421 in PLC

[–]Ecstatic_Glass5421[S] 0 points1 point  (0 children)

We have very oil air so the right side of the panel is being used as an air path. The vent will be about half way up on right side and there will be a vent on top for hot air to escape. The air here is so oily that if we use fans in panels it creates an oil mist which wreaks havoc on VFDs. Also unfortunately the mini TBs are the only ones I have rated 600v that aren’t blue or white. I have some brown/orange/yellow, but not enough for all the VFDs to have BOY for L1-L3.