WEG SSW-06 - Page 162

CHAPTER 7 - PROGRAMMING INFORMATION AND SUGGESTIONS
162
Overpower are more sensitive and detect variations in both voltage
and current.
Example of Overcurrent setting:
Nominal motor current of 100A.
There is a normal ±10A load oscillation in this application.
The motor Service Factor (S.F.) is 1.15.
In percentage:
There is a normal load oscillation of ±10% of the nominal motor current.
The motor tolerates a 15% overload according to the S.F.
In order to get Overload protection, the Overcurrent protection can be
programmed higher than 15%.
P401=100A
P612=20%
P613=1s
Therefore, when there is an increase higher than 20% in the motor
current, regarding the nominal current, the protection will trip.
The same sequence demonstrated above is valid also for Overtorque
and Overpower; however the respective parameters for the desired
functionmustbeadjusted.