ABB LVS Digital FC610 - 3.3.2 Current Unbalance Supervision; 3.3.3 Voltage Unbalance Supervision

POWER QUALIT Y PR ODUCT FU NCTION S
1TNC9 2825 0M0201 22
Current unbalance supervision settings
Value range
0=Disable 1=Enable
Default value
0
Threshold
Value range
50-90 %
Defaults value
50 %
Step value
1 %
Hysteresis
Value range
0-10 %
Default value
2 %
Step value
1 %
3.3.3 Voltage unbalance supervision
FC610 monitors unbalanced voltage and voltage unbalanced condition.
Unbalanced voltage is presented as a percentage value following below calculation and displayed di-
rectly through HMI.







 






 






 





Where





 

 


The voltage unbalance threshold and hysteresis are both presented as percentage value. A volt-
age unbalance event is detected when voltage unbalance value U
nba
is above the threshold. The
event ends when the U
nba
is equal to or below the threshold minus the hysteresis.
Voltage unbalance supervision settings
Value range
0=Disable 1=Enable
Default value
0
Threshold
Value range
50-90 %
Default value
50 %
Step value
1 %
Hysteresis
Value range
0-10 %
Default value
2 %
Step value
1 %