UPS bypass mode is a state of the system where no power is being supplied to the equipment or hardware.
What a UPS does
A UPS or Uninterruptible Power Source System is a machine that provides emergency power to computers and other data sources if power should fail. A UPS system will give you surge protection and battery power in the critical moments when there is a power cut and you need to backup, save and shut down your electronic systems properly.
What happens when a UPS system is in bypass mode?
When a UPS system goes into Bypass mode it goes offline and if there is a power cut you will not have protection to your electronics. Bypass mode is often used when you need to carry out system maintenance, but there are other tweaks you can get for your UPS system so that even in bypass mode you are protected from losing all your data.
Watch this video to find out more about how UPS systems workHere's more about this from the technology boards //technology.blurtit.com/3214460/whats-the-difference-between-offline-ups-and-online-ups
And one from the employment board: //employment.blurtit.com/232440/what-are-the-differences-between-avr-and-ups