ABB RELION 620 Series Technical Manual page 698

Section 4
Protection functions
4.5.9.6
4.5.9.7
Table 650: LVRTPTUV Group settings (Basic)
Parameter
Voltage start value
Table 651: LVRTPTUV Non group settings (Basic)
Parameter
Operation
Num of start phases
Voltage selection
Active coordinates
Voltage level 1
Voltage level 2
Voltage level 3
Table continues on next page
692
Signals
Table 648: LVRTPTUV Input signals
Name
U_A_AB
U_A_BC
U_A_CA
U
1
BLOCK
Table 649: LVRTPTUV Output signals
Name
OPERATE
START
Settings
Values (Range) Unit
0.05...1.20 xUn
Values (Range) Unit
1=on
5=off
4=Exactly 1 of 3
5=Exactly 2 of 3
6=Exactly 3 of 3
1=Highest Ph-to-E
2=Lowest Ph-to-E
3=Highest Ph-to-
Ph
4=Lowest Ph-to-Ph
5=Positive Seq
1...10
0.00...1.20 xUn
0.00...1.20 xUn
0.00...1.20 xUn
Type Default Description
SIGNAL 0 Phase-to-earth voltage A or phase-to-phase
voltage AB
SIGNAL 0 Phase-to-earth voltage B or phase-to-phase
voltage BC
SIGNAL 0 Phase-to-earth voltage C or phase-to-phase
voltage CA
SIGNAL 0 Positive phase sequence voltage
BOOLEAN 0=False Block signal for activating the blocking mode
Type Description
BOOLEAN Operate
BOOLEAN Start
Step Default
0.01 0.90
Step Default
1=on
4=Exactly 1 of 3
4=Lowest Ph-to-
Ph
1 3
0.01 0.20
0.01 0.80
0.01 0.90
1MRS757644 F
Description
Voltage value below which function starts
Description
Operation Off / On
Number of faulty phases
Parameter to select voltage for curve
monitoring
Coordinates used for defining LVRT curve
1st voltage coordinate for defining LVRT
curve
2nd voltage coordinate for defining LVRT
curve
3rd voltage coordinate for defining LVRT
curve
Technical Manual
620 series