On Friday, 10 November 2017 19:00:30 UTC, wrote:
On Friday, 10 November 2017 17:05:19 UTC, Dave Plowman (News) wrote:

How do you get 415v from a UPS?

The same way you get it from a 3-phase mains connection. If the UPS
output happens at some moment to be phase shifted by 120 degrees
relative to a nearby mains-powered device then the phase to phase
voltage will be 415V.

The chance of connecting yourself between two line connections in
a 3-phase mains system or in a mains plus UPS situation is vanishingly
small, so no need to worry in either case.

However, nobody seems to worry about UPSs but they do about 3-phase mains.

John

2x UPSes can output 480v ac between them when mains power goes down. RCDs much reduce the shock risk.


NT