ABB PSTX720 - Page 113

1SFC132081M0201 | Installation and commissioning manual | Functions 113
7.18.3 Thyristor overload warning
The thyristor temperature is higher than 90 % of the trip
level.
Thyristor overload warning has these parameters:
Parameter Description Setting range Default value
20.08 Thyristor OL out Identifies the Event groups this
warning is part of.
Eventgroup 0 ... 6 0000100
20.09 Thyristor OL Enables thyristor overload warning. Off, On Off
7.18.4 Current underload warning
The line current decreases below the specified value
during continuous operation.
Current underload warning has these parameters:
Parameter Description Setting range Default value
21.01 Curr underload level Sets the Current underload warning
level.
0.1 ... 1.0 × I
e
0.8 × I
e
21.02 Curr underload trip time Sets the time that the current is
lower than the Warning level to trip.
0 ... 30 s 1 s
21.03 Curr underload delay time Sets the time delay after Top of
ramp when the warning is enabled.
0 ... 30 s 5 s
21.04 Curr underload out Identifies the Event groups this
warning is part of.
Eventgroup 0 ... 6 0000100
21.05 Curr underload Enables Current underload warning. Off, On Off
7.18.5 Power factor underload warning
The power factor is below the warning level.
Power factor underload warning has these
parameters:
Parameter Description Setting range Default value
21.06 Pwr factor underload level Sets the Power factor underload limit. 0.0 ... 1.0 0.7
21.07 Pwr factor underload trip time The time it is below limit until trip. 0 ... 30 s 1 s
21.08 Pwr factor underload delay time The time until diagnoser starts to work in
Top of ramp.
0 ... 30 s 5 s
21.09 Pwr factor underload out Identifies the Event groups this warning is
part of.
Eventgroup 0 ... 6 0000100
21.10 Pwr factor underload Enables Power factor underload warning. Off, On Off
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