ABB PSTX Series Installation And Commissioning Manual page 105

7.17.5 Power factor underload protection
The power factor is below the normal level.
Use the Power factor underload protection to supervise
the load of the motor. If the load decreases the power
factor also decreases.
This protection only operates in the Top of ramp state.
Power factor underload protection has these
parameters:
Parameter
14.06 Pwr factor underload level
14.07 Pwr factor underload trip time
14.08 Pwr factor underload delay time
14.09 Pwr factor underload out
14.10 Pwr factor underload op
7.17.6 Current imbalance protection
This protection senses if there is imbalance in the
currents. Correctly all 3 phases have the same current.
This protection only operates in the Top of ramp state.
Current imbalance protection has these parameters:
Parameter
14.11 Curr imb level
14.12 Curr imb trip time
14.13 Curr imb delay time
14.14 Curr imb out
14.15 Curr imb operation
Description
Sets the Power factor underload
trip level.
Sets the time that the Power
factor is below the trip level to
trip.
Sets the time after Top of ramp
that the protection is enabled.
Identifies the Event groups this
protection is part of.
Sets the operation of this
protection.
Description
Sets the permitted Current
imbalance level between the phase
with the highest current and the
phase with the lowest current.
Sets the time that the Current
imbalance is below the trip level to
trip.
Sets the time after Top of ramp that
the protection is enabled.
Identifies the Event groups this
protection is part of.
Sets the operation of this
protection.
1SFC132081M0201 | Installation and commissioning manual | Functions
Setting range Default value
0.0 ... 1.0 0.5
0 ... 30 s 10 s
0 ... 30 s 5 s
Eventgroup 0 ... 6 0000010
Off, Stop manual, Off
Stop auto, Indication.
Setting range Default value
10 ... 80% 80%
1 ... 30 s 10 s
1 ... 30 s 5 s
Eventgroup 0 ...6 0000010
Off, Stop manual, Off
Stop auto, Indication.
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