UPS effect on Arc Flash
UPS effect on Arc Flash
(OP)
I'm running an arc flash analysis and the system has a 60 kVA UPS attached. Upstream of this UPS I am getting numbers of 0.5 cal/cm^2, but I look on the side that the UPS would be powering and it jumps to 136 cal/cm^2.
Is this a common effect of a UPS in arc flash analysis?
I find it interesting that this happens.
Is this a common effect of a UPS in arc flash analysis?
I find it interesting that this happens.






RE: UPS effect on Arc Flash
In reality, no UPS is going to be able to produce this much energy. So you need to do a reality check and figure out what is really going to happen when a short circuit occurs downstream of a UPS.
RE: UPS effect on Arc Flash
RE: UPS effect on Arc Flash
RE: UPS effect on Arc Flash
I have worked on UPS systems where the UPS's method of operation under an output 'short' condition had 12 different programmable parameters.