peebee,
there are 3 DC power supplies (208VAC single phase to 24VDC).
These power all the (low current) solenoids for the pneumatics, sensors, DeviceNet components and some of the smaller servo drives.
The rest are all 208 VAC single phase devices.
For instance, robot, other servo drives, PLC...
rbulsara, peebee,
It's a custom machinery. We did not buy it.
Inside is a robot and several servo drives, plc & pneumatics etc. So it did not come with a vendor nameplate.
I assume that Power Factor is most likely close to 95 or 1.
Makes sense.
I'll gather the ratings of each of the...
Thanks to everyone for helping me with this.
I understand it much better now.
To clarify one more thing.
We need to make up a Nameplate for this machinery that states the "Full Load Current".
I'm now assuming it will need to state 11Amps?
bulsara,
the 0.7 is not for pf. I used it to convert...
Thanks for your resonses guys.
The system does not use single or 3 phase motors.
I should be safe this way.
I think I understand that I need to use sqrt(3) when using the 3 phase power calculation.
However, I thought that I already did this when I figured 11 Amps for each phase.
phase Amps *...
We have an industrial machinery that uses 208VAC 3 phase power (3 wire + Earth ground).
I need to figure out the Full load current and power consumption in KWatts to specify a UPS unit.
Each phase is fairly well balanced and draws about 7 Amps peak each during normal operation.
For extra...
