Pump motor controlled by Abb frequency drive
Pump motor controlled by Abb frequency drive
(OP)
Hi, I am involved with cooling industry and I saw something that I cannot understand:
- one water pump motor, 480V,60Hz, 265kW, 383A, cos 0,87, T=50 degrees.
- one frequency drive ABB ACS550-02-486A-4
What I do not understand is that: at 81,6%load current is 393A, at around 50Hz. That means more than nominal current of the motor. Also voltage is lower than nominal at 50Hz, of course. The current should not be less than nominal at this 50Hz? Who makes increasing current possible?
- one water pump motor, 480V,60Hz, 265kW, 383A, cos 0,87, T=50 degrees.
- one frequency drive ABB ACS550-02-486A-4
What I do not understand is that: at 81,6%load current is 393A, at around 50Hz. That means more than nominal current of the motor. Also voltage is lower than nominal at 50Hz, of course. The current should not be less than nominal at this 50Hz? Who makes increasing current possible?





RE: Pump motor controlled by Abb frequency drive
If that is so, it looks like you have a slight overload.
It is also possible that the drive is in scalar mode and has been set incorrectly. The "Pump Curves" are not always correct - or using the right "corner point".
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Pump motor controlled by Abb frequency drive
RE: Pump motor controlled by Abb frequency drive
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...