UPS sizing for motor load
UPS sizing for motor load
(OP)
Does anyone have any tips for sizing a UPS when it is driving a motor load? My applicaiton requires the motor to start while under UPS power. My main concern is how to include the inrush current when calculating the load and run time?





RE: UPS sizing for motor load
RE: UPS sizing for motor load
UPSs have limited capacity to deliver short circuit current or starting current for loads such as motors.
Most UPS will transfer to it's static bypass source in 10 seconds if the load is more than 125% its rating.
Make sure this is acceptable for your application. Check against your motor's starting current and its duration (acceleration time) vs. UPS overload characteristics.
Using solid-state starters or VFD's should help.
RE: UPS sizing for motor load
RE: UPS sizing for motor load
"Venditori de oleum-vipera non vigere excordis populi"