ABB Relion 620 Series - Settings

10.4.6 Signals
Table 1052: VSQVUB Input signals
Name Type Default Description
U_A SIGNAL 0 Phase A voltage
U_B SIGNAL 0 Phase B voltage
U_C SIGNAL 0 Phase C voltage
U
1
SIGNAL 0 Positive phase se-
quence voltage
U
2
SIGNAL 0 Negative phase se-
quence voltage
U
0
SIGNAL 0 Zero sequence volt-
age
BLOCK BOOLEAN 0=False Block all outputs ex-
cept measured values
Table 1053: VSQVUB Output signals
Name Type Description
MN_UNB_AL BOOLEAN Alarm active when 3 sec volt-
age unbalance exceeds the
limit
PCT_UNB_AL BOOLEAN Alarm active when percentile
unbalance exceeds the limit
OBS_PR_ACT BOOLEAN Observation period is active
10.4.7 Settings
Table 1054: VSQVUB Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation
1=on
5=off
1=on Operation On/Off
Unb detection
method
1=Neg Seq
2=Zero Seq
3=Neg to Pos Seq
4=Zero to Pos Seq
5=Ph vectors Comp
3=Neg to Pos Seq Set the operation
mode for voltage
unbalance calcula-
tion
Unbalance start Val 1...100 % 1 1 Voltage unbalance
start value
Trigger mode
1=Single
2=Periodic
3=Continuous
3=Continuous Specifies the ob-
servation period
triggering mode
Table continues on the next page
1MRS757644 H Power quality measurement functions
620 series
Technical Manual
1115