DISCLAIMER: I know little to nothing about electronics. :-(
We are in the US and the bulk of the Data Center is running 110-120v devices and outlets. Our Data Center's large central UPS system is being worked on this weekend. We have been told that while it's unlikely there will be any power issues, if commercial power goes while the UPS is down, devices will go down.
One particular older device has my manager worried. It has dual power supplies that can "automatically" switch between 120v and 240v. Both are presently on 120v.
We have a portable UPS but it is for 240v. What my manager wants me to do is to move the device from its 120v source to the 240v source WHILE IT IS STILL POWERED ON -- meaning that at one point, one power supply will have theoretically switched to 240v while the other is still running 120v.
Again, I know little or nothing - but the very idea made alarm bells go off. However, I couldn't tell him with any certainty that this would end badly.
I understand that it may depend on the hardware, manufacturer, the zodiac sign it was built under or whatever - but what is the general opinion here on what the outcome might be?
Thanks for any response, and I am sorry for my ignorance.