Voltage Swell Supervision - ABB LVS Digital FC610 User Manual

P OWER QUA LIT Y
3.3.5
Voltage swell is the condition when the voltage in the electrical system temporarily increase
above a threshold.
The swell threshold and hysteresis voltage settings are a percentage of the system rated volt-
age Un.
In single-phase system, when U
returns to or below the swell threshold minus the hysteresis, the alarm is reset.
In three-phase system, when U
The alarm is reset when U
hysteresis value.
Voltage swell supervision settings
Value range
Default value
Threshold
Value range
Default value
Step value
Hysteresis
Value range
Default value
Step value
1T N C928 25 0M0 201

Voltage swell supervision

rise above the threshold, an alarm is triggered; when U
swl
of any phase rise above the threshold, an alarm is triggered;
swl
of three-phase is returned to or below the threshold minus the
swl
0=Disable 1=Enable
0
5-20 %
10 %
1 %
0-10 %
2 %
1 %
PR OD UCT FU NCTI ONS
swl
2 4